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Propene acid is an organic compound with the formula CH2=CHCOOH.
Propene acid is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus.
CAS Number: 79-10-7
EC Number: 201-177-9
IUPAC Name: Prop-2-enoic acid
Chemical Formula: C3H4O2
Other names: ACRYLIC ACID, 2-Propenoic acid, 79-10-7, prop-2-enoic acid, Propenoic acid, Vinylformic acid, Acroleic acid, Ethylenecarboxylic acid, Propene acid, ACRYLATE, Propenoate, 9003-01-4, Glacial acrylic acid, Kyselina akrylova, Acrylic acid, glacial, RCRA waste number U008, Acide acrylique, Acido acrilio, Caswell No. 009A, Carbopol 934p, Viscalex HV 30, NSC 4765, CCRIS 737, Acrylic resin, HSDB 1421, UNII-J94PBK7X8S, EINECS 201-177-9, J94PBK7X8S, Carbopol 940, BRN 0635743, ACRLYLIC ACID, DTXSID0039229, CHEBI:18308, AI3-15717, NSC-4765, DTXCID8028, Aron, Antiprex A, Versicol E9, NSC4765, EC 201-177-9, Acrylic acid resin, Acrysol ase-75, C3:1n-1, Versicol E 7, Versicol E15, 4-02-00-01455 (Beilstein Handbook Reference), Acrysol A 1, Acrysol A 3, Acrysol A 5, Acrysol A-1, Acrysol AC 5, Carbopol 960, Carboset 515, Primal Ase 60, Revacryl A191, Versicol K 11, Versicol S 25, Dispex C40, Acrysol WS-24, Cyguard 266, Joncryl 678, Jurimer AC 10H, Jurimer AC 10P, Nalfloc 636, Good-rite K 37, Revacryl A 191, Junlon 110, Viscon 103, Good-rite K 702, Good-rite K 732, Good-rite WS 801, NCGC00166246-01, Synthemul 90-588, Aron A 10H, Carboset Resin No. 515, ACRYLIC ACID (IARC), ACRYLIC ACID [IARC], OLD 01, PA 11M, PAA-25, Carbopol, P 11H, P-11H, WS 24, Acido acrilio [Spanish], Acide acrylique [French], WS 801, Kyselina akrylova [Czech], R968, UN2218, RCRA waste no. U008, allenediol, Acrysol lmw-20X, XPA, Aqueous acrylic acid, 25987-55-7, Dow Latex 354, Ethene carboxylic acid, Acrylic acid, inhibited, CH2=CHCOOH, (stabilized with MEHQ), Carbomer 934 (NF), Carbomer 940 (NF), Carbomer 941 (NF), Carbopol 910 (TN), Carbopol 934 (TN), Carbopol 940 (TN), Carbopol 941 (TN), Carbomer 934P (NF), Carbopol 934P (TN), Carbomer 910 (USAN), ACRYLIC ACID [MI], Carbomer 1342 (NF), Carbopol 1342 (TN), ACRYLIC ACID [HSDB], WLN: QV1U1, average Mv ~450,000, UN 2218 (Salt/Mix), Acrylic acid, p.a., 99%, CHEMBL1213529, STR00040, Tox21_112372, LMFA01030193, MFCD00004367, NSC106034, NSC106035, NSC106036, NSC106037, NSC112122, NSC112123, NSC114472, NSC165257, NSC226569, STL281870, AKOS000118799, DB02579, NSC-106034, NSC-106035, NSC-106036, NSC-106037, NSC-112122, NSC-112123, NSC-114472, NSC-165257, NSC-226569, CAS-79-10-7, Poly(acrylic acid), 25% soln in water, BP-30259, 1ST001124, DB-220116, DB-251641, A0141, NS00001146, EN300-17959, C00511, C19501, D03392, D03393, D03394, D03395, D03396, D03397, Acrylic Acid contains 200ppm MEHQ as inhibitor, Acrylic acid, inhibited [UN2218] [Corrosive], A830860, Q324628, Z57127944, F0001-2070, InChI=1/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5, Acrylic acid, anhydrous, contains 200 ppm MEHQ as inhibitor, 99%, Acrylic acid, SAJ first grade, >=97.0%, contains 190-210 ppm MEHQ as stabilizer, 1204391-75-2, 55927-87-2, 9063-87-0
This colorless liquid has a characteristic acrid or tart smell.
Propene acid is miscible with water, alcohols, ethers, and chloroform.
More than a million tons are produced annually
Because Propene acid and its esters have long been valued commercially, many other methods have been developed.
Most have been abandoned for economic or environmental reasons.
An early method was the hydrocarboxylation of acetylene ("Reppe chemistry"):
This method requires nickel carbonyl, high pressures of carbon monoxide, and acetylene, which is relatively expensive compared to propylene.
Propene acid was once manufactured by the hydrolysis of acrylonitrile, a material derived from propene by ammoxidation, but this route was abandoned because it cogenerates ammonium side products, which must be disposed of.
Other now abandoned precursors to Propene acid include ethenone and ethylene cyanohydrin.
Propene acid is an organic molecule and the simplest of the unsaturated acids.
At room temperature, Propene acid is a liquid and has a characteristic acid and tart aroma.
Propene acid is corrosive in liquid and vapor forms. Propene acid is used mainly in the formation of polymers.
Propene acids uses include plastics, coatings, adhesives, elastomers, paints, and polishes.
Additionally, Propene acid is used in the production of hygienic medical products, detergents, and wastewater treatment chemicals.
The low toxicity of Propene acid is due to its corrosive nature.
Studies have suggested that Propene acid poses some reproductive hazards; however, conflicting data exist regarding the genotoxicity of Propene acid.
Propene acid's production and use in the manufacture of plastics, paint formulations, leather finishings, paper coatings, and in medicine and dentistry for dental plates, artificial teeth, and orthopedic cement may result in its release to the environment through various waste streams.
Propene acid has also been identified in nine species of chlorophyceae algae, 10 species of rhodophyceae algae, and in the rumen fluid of sheep.
If released to air, a vapor pressure of 3.97 mmHg at 25 °C indicates Propene acid will exist solely as a vapor in the ambient atmosphere.
Vapor-phase Propene acid will be degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 2 days.
If released to soil, Propene acid is expected to have very high mobility.
Volatilization from moist soil surfaces is expected to be slow.
Propene acid may potentially volatilize from dry soil surfaces based upon its vapor pressure.
If released into water, Propene acid is not expected to adsorb to suspended solids and sediment in the water column.
Biodegradation under both aerobic and anaerobic conditions is expected to occur.
Propene acid is an important polymer as raw material for many industrial and consumer products.
Propene acid can numerous to apply for surface coatings, textiles, adhesives, paper treatment, baby diapers, feminine hygiene products detergents and super absorbent polymers as known .
Currently, most Propene acid is obtained from the catalytic partial oxidation of propene which is a by-product of ethylene and gasoline production.
In this two-step oxidation reaction via acrolein is usually preferred, achieving about 90 % overall yield.
However, this conventional process affects global CO2 emissions: 175 kg/ton of CO2 has been released in converting propene to Propene acid (Segawa, 2014) and petrochemical carbons sources are limited and not renewable.
The global Propene acid market sizes is growing. Because Propene acid demands for super absorbent polymers is expected the growth.
This process feedstock, propene, is related to volatile crude oil prices.
Therefore, alternative methods have been studied such as biomass resources.
Propene acid is encouraging to find renewable alternatives to produce Propene acid in more environmentally friendly and economical way.
Most of the feedstock for producing the Propene acid, the quantitative conversion to lactic acid would open a new market for renewable resources.
There are recent advances in the research and development of Propene acid via the fermentation of renewable sources using microorganisms that ferment the 3-hydroxyproponic acid that is then dehydrated to from Propene acid.
In this paper, we focus on the process after the dehydration of 3-hydroxypropionic acid to produce Propene acid.
We conducted simulations and designed proposed model using commercial simulators that referred as the patent product components.
This process introduced a quencher using solvent to cool the main stream in order to separate water in extractor unit and to avoid Propene acid polymerization.
Propene acid remove water from fermentation reaction of biomass and catalytic dehydration reaction of 3-HP.
By first removing water from the quencher through solvent, the initial investment cost and the operating cost of the separation process can be reduced.
Appearance: Clear, colorless liquid
Odor: Acrid
Density: 1.051 g/mL
Melting point: 14 °C
Boiling point: 141 °C
Solubility in water: Miscible
log P: 0.28
Vapor pressure: 3 mmHg
Acidity (pKa): 4.25 (H2O)
Molecular Weight: 72.06 g/mol
XLogP3: 0.3
Hydrogen Bond Donor Count: 1
Hydrogen Bond Acceptor Count: 2
Rotatable Bond Count: 1
Exact Mass: 72.021129366 g/mol
Monoisotopic Mass: 72.021129366 g/mol
Topological Polar Surface Area: 37.3Ų
Heavy Atom Count: 5
Complexity: 55.9
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes
Propene acid is used in the manufacture of plastics, paint formulations, and other products. Exposure occurs primarily in the workplace.
Propene acid is a strong irritant to the skin, eyes, and mucous membranes in humans.
No information is available on the reproductive, developmental, or carcinogenic effects of Propene acid in humans. Animal cancer studies have reported both positive and negative results.
EPA has not classified Propene acid for carcinogenicity.
Propene acid is used in the manufacture of plastics, paint formulations, and other products.
Exposure occurs primarily in the workplace.
Propene acid is a strong irritant to the skin, eyes, and mucous membranes in humans.
No information is available on the reproductive, developmental, or carcinogenic effects of Propene acid in humans.
Animal cancer studies have reported both positive and negative results.
EPA has not classified Propene acid for carcinogenicity.
Copolymer hydrogels of Propene acid (AA) with N,N-dimethylacrylamide (NNDMAAm) were synthesized by solution free radical polymerization at different feed mol monomer ratios.
The monomer reactivity ratios were determined by Kelen-Tüdös method.
According to that, the monomer reactivity ratios for poly(AA-co-NNDMAAm) were r1 = 0.650 (M1=AA) and r2= 1.160 (M2=NNDMAAm), (r1 x r2= 0.753).
The effect of reaction parameters including:
the concentration of cross-linking reagent, monomer concentration, pH, temperature, salt solutions, and solvent polarity on the water absorption have been studied.
The hydrogels achieved water-absorption values of 544 g water/ g xerogel for the copolymer poly(AA-co-NNDMAAm) 3:1 atpH 5.
Low critieal solution temperature (LCST) values of hydrogels, showed an increase whenthe hydrophilic Propene acid moiety eontent increased in the copolymers.
In recent years, considerable research attention has been focused on intelligent polymer materials, especially hydrogels that contain functional groups and are able to alter their volume or other properties in response to environmental stimuli, such as pH, temperature and electric field, among others.
Propene acid is cross-linked three-dimensional hydrophilic polymer networks that swell but do not dissolve when brought into contact with water.
Propene acid are a class of polymeric materials with the ability to hold a substantial amount of water, presenting a soft, rubbery-like consisteney, and low interfacial tensión parameters.
Propene acid properties mainly depend on the degree of cross-linking, the chemical composition of the polymeric chains, and the interaction between the network and surrounding liquids..
Hydrophilicity or high water retention in hydrogels is attributed to the presence of hydrophilic groups, such as carboxylic acids, amides, and alcohols.
The structural features of these materials domínate its surface properties, permeselectivity and permeability, giving hydrogels their unique, interesting properties, and the similarity of their physical properties to those present in livingtissues.
The important swelling of hydrogels based on Propene acid is facilitated by the presence of carboxylic acid groups in the polymer chain, which are strongly associated with water molecules.
These groups are readily ionisable and sensitive to the effeets of pH and ionic strength.
Thus, the equilibrium swelling of Propene acid copolymers are affected by the solution's pH and ionic strength in which they are swelled.
Polymer gels play an important role in many emerging technological areas such as drug delivery, sensors, and superabsorbent materials.
Copolymerization reaction of two monomers is an effective method to modify the physical properties of polymer gels
Several authors have studied the Low Critieal Solution Temperature (LCST) in poly(isopropyl acrylamide) hydrogels (PNIPAAm) and reported that incorporation of an hydrophilic comonomer leads to a higher values of LCST, while incorporation of a hydrophobic monomer decreases the Low Critieal Solution Temperature.
A good balance between hydrophilic and hydrophobic interactions in the polymer, explains this sharp phase transition.
The transition temperature ofthe cross-liked gels changed according to the feed monomer ratio used in the copolymerization reaction.
The pH value ofthe solution strongly affected the swelling ratio.
Several methods to detect LCST have been reported, including light scattering to detect the coil-to-globule transition , turbidimetric measurements to achieve phase transition or differential scanning calorimetry (DSC) to measure the transition heat.
Propene acid are also used in pharmacological applications, in controlled release, water purification, drug reléase system, and others.
We have previously published the synthesis and swelling properties of hydrogels from functional vinyl monomers.
These systems showed that the copolymers containing Propene acid and acrylamide derivative moieties are very sensitive to stimuli as pH, temperature, ionic strength, and copolymer composition.
Thus, the influence of water absorption at room temperature was strong at pH 5 and pH 7, with maximums between 1200 and 1600 %, when the poly(2-hydroxyethylmethacrylate-co-maleoylglycine) P(HEMA-co-MG) was richest in HEMA monomer unit.
The aim of this paper is to synthesize by solution, free radical polymerization copolymers of Propene acid (AA) with N,N¢-dimethylacrylamide (NNDMAAm), at different feed monomer ratios and degrees of cross-linking, and to study the swelling properties of these hydrogel systems in distilled water and ethanol at different pH, temperature, time, and salt concentration.
The thermal properties of the copolymers, specially the glass transition temperatures (Tg), and the thermal decomposition will also be determined.
Propene acid esters in water-based coating, in particular butyl acrylates, are replacing more an more solvent borne paints.
Typical commodity esters of Propene acid are methyl-, ethyl-, n-butyl- and 2-ethylhexyl (2EHA)- esters.
The strongest growth rates are expected with 2EHA, followed by butyl acrylate, methyl acrylate and ethyl acrylate.
Esters from alcohols like polyols, isobutanol, hexanol and iso-octanol are of less importance in the polymer industry.
Acrylic polymers are considered as non toxic and are gaining more and more importance.
Typically these esters are catalysed at a temperature range between 70°C (160°F) and 130°C (265°F) to avoid the formation of the ethers from the alcohols.
Propene acid is an unsaturated carboxylic acid.
Propene acid reacts as a vinyl compound and as a carboxylic acid.
Propene acid readily undergoes polymerization and addition reactions.
Propene acid can be used as a carboxylic acid to produce acrylic esters, acrylamide, N-substituted acrylamides and acrylyl chloride by common methods.
Copolymers can be produced with acrylic and methacrylic esters, acrylonitrile, maleic acid esters, vinyl acetate, vinyl chloride, vinylidene chloride, styrene, butadiene and ethylene.
Homopolymers of Propene acid and copolymers which contain a preponderance of Propene acid have a glassy consistency and are frequently soluble in water.
They can be used in the form of their free acids and ammonium and alkali salts in many different applications, such as thickeners, dispersing agents, flocculants, protective colloids for stabilizing emulsions and polymer dispersions, wetting agents, coatings and textile finishes.
Propene acid readily undergoes addition reactions with a wide variety of organic and inorganic compounds.
This makes it a very useful feed-stock for the production of many low molecular compounds.
For instance, Propene acid can be used to produce derivatives of propionic acid with water, alcohols, amines, halogens and chlorinated hydrocar-bons.
Propene acid can also be used with other substances to produce unsaturated fatty acids, heterocyclic compounds and Diels-Alder addition products.
Propene acid and esters are versatile monomers used as building blocks for thousands of polymer formulations.
They are flammable, reactive, volatile liquids based on an alpha-, beta-unsaturated carboxyl structure.
Incorporation of varying percentages of acrylate monomers permits the production of many formulations for latex and solution copolymers, copolymer plastics and cross-linkable polymer systems.
Their performance characteristics—which impart varying degrees of tackiness, durability, hardness, and glass transition temperatures—promote consumption in many end-use applications.
Major markets for the esters include surface coatings, textiles, adhesives, and plastics.
PolyPropene acid or copolymers find applications in superabsorbents, detergents, dispersants, flocculants, and thickeners.
Superabsorbent polymers (SAPs) are used primarily in disposable diapers.
Crude Propene acid (CAA) is made by the oxidation of propylene.
About half of the CAA is converted to acrylate esters, and the remaining half is purified to 98–99.5% purity to glacial Propene acid (GAA).
In turn, GAA is converted into polyPropene acid, which can be further modified to produce superabsorbent polymers (SAPs) and other polyPropene acid copolymers used as dispersants/antiscalants, anionic polyelectrolytes for water treatment, and rheology modifiers.
Growth in GAA consumption is forecast at about 3.5% per year during 2020–25.
More information on the superabsorbent polymers market can be found in the CEH Superabsorbent Polymers report.
Acrylate esters impart many desirable qualities to polymeric materials, such as color stability and clarity, heat and aging resistance, good weatherability, and low-temperature flexibility.
One of the important properties of acrylate esters is their glass transition temperature (Tg), which influences the characteristic temperature at which the resultant polymer undergoes a change from a brittle system to a softer, more flexible one.
The Tg has a major influence on the minimum film formation temperature of the coating or adhesive.
(The minimum film formation temperature is also influenced by the levels and types of cosolvents and coalescing agents, plasticizers, and other additives added to the polymer or to the coating formulation.)
The shorter-chain monomers (e.g., methyl acrylate) produce harder, more brittle polymers, while the longer-chain monomers (e.g., 2-ethylhexyl acrylate) impart softness and flexibility.
Growth in demand for crude Propene acid is forecast at 3.5–4% per year during 2020–25, driven by growth in superabsorbent polymers and acrylate esters.
SAP growth will be strongest in mainland China and other parts of Asia, but will be much more moderate in the mature regions of North America, Western Europe, and Japan.
SAP is being used in greater quantities as the population in developing nations continues to increase its use of disposable diapers and incontinence products.
Acrylic esters are used principally in coatings and adhesives, which are also areas of growth in developing countries.
Clear, colorless liquid with a characteristic acrid odor. It is miscible with water, alcohols and ethers.
Propene acid will undergo the typical reactions of a carboxylic acid, as well as reactions of the double bond similar to those of the acrylate esters.
Propene acid lends itself to polymer preparation as well as use as a chemical intermediate.
Acrylate esters, both mono- and multifunctional, are generally prepared from Propene acid
Paints and Coatings
Adhesives
Detergents
Diapers
Floor Polish
Variety of Medical Applications
Impact strength, flexibility, durability, toughness
Weather resistance, moisture resistance
Crosslinking sites, acid group reacts readily with alcohols, acrylates and styrenics
Hardness, wet and dry adhesion and abrasion resistance are also properties of GAA copolymers
Acrylic, any of a broad array of synthetic resins and fibres that are based on derivatives of acrylic and methPropene acid.
Both Propene acid (CH2=CHCO2H) and methPropene acid (CH2=C[CH3]CO2H) have been synthesized since the mid-19th century, but the practical potential of materials related to these compounds became apparent only about 1901, when German chemist Otto Röhm published doctoral research on polymers of acrylic esters.
Beginning on a commercial basis in the 1930s, esters of Propene acid were polymerized to form the polyacrylate resins, which are now important constituents of acrylic paints, and methPropene acid esters were polymerized to polymethyl methacrylate, a clear plastic sold under trademarks such as Plexiglas and Perspex.
In 1950 Orlon, the first commercially successful acrylic fibre, was introduced by E.I. du Pont de Nemours & Company (now DuPont Company). Acrylic and modacrylic fibres are based on polyacrylonitrile.
Other acrylics include cyanoacrylate resins, made into fast-acting adhesives; poly-2-hydroxyethyl methacrylate, abbreviated polyHEMA, made into soft contact lenses; polyacrylamide resins, used as flocculents in water clarification; and rubber products made of polyacrylate elastomer.
Propene acids are colorless and pungent-smelling acids that exist as liquids at room temperature and pressure.
There are 2 commercial grades, which are used for esterification (94%) and used to make water-soluble resins (98%-99.5%). It polymerizes easily when exposed to light, heat or metal.
An x indicator must always be present for polymerization.
Propene acid belongs to the class of organic compounds, it is also specified as 2-Propenoic Acid or Acrylate.
Propene acid exists as a water-soluble liquid and a weakly acidic chemical compound.
Propene acid is also known as the simplest chemical compound of p-Unsaturated carboxylic acid.
When its structure is examined, Propene acid is seen that a vinyl group is attached to a carbonyl group and that these compounds of this acid go through processes similar to the reactions of carboxylic acids.
A double bond and a functional carboxylic acid group in its structure play an important role in giving characteristic reactions similar to the properties of the carboxylic acid.
Propene acid is an organic acid with the formula CH2 = CH-COOH, also called propenoic acid.
In industry, the reaction of acetylene and carbon monoxide with nickel catalyst in the presence of water is obtained by hydrolysis of the more common acrylonitrile compounds.
Propene acid is the starting material for the production of polymers.
Acrylic compounds are the raw material of various compounds such as molded building materials, optical instruments, woven fiber, jewellery, adhesives, coating materials.
For example, orlon and acrylan are the trade names of tab acrylic materials for plexiglass glass and acrylic yarns.
The sprayed members of the group of polymers known as polyacrylic are acrylic and methPropene acids.
Methyl esters of acids easily polymerize in the presence of peroxide catalysts.
Propene acids are colorless and pungent-smelling acids that exist as liquids at microcosm temperature and pressure.
There are two commercially available grades of mating, the hard-to-use (94%) and the water-soluble resin (98% - 99.5%).
Propene acid polymerizes easily when exposed to light, heat or metal.
Propene acid (IUPAC: prop-2-enoic acid) is an organic compound with the formula CH2 = CHCO2H.
Propene acid is the simplest unsaturated carboxylic acid containing the vinyl group directly attached to the carboxylic acid terminus.
This colorless liquid has a characteristic acrid and sour odour.
Miscible with alcohols, ethers, water and chloroform.
More than one billion kilograms are produced annually.
Propene is obtained from Propene acid, a by-product of gasoline and ethylene production.
Propene acid Reactions and Uses:
When Propene acid is reacted with alcohol; The carboxylic acid is subjected to typical reactions to form the ester.
Propene acid esters and salts are also known collectively as acrylates or propenoates.
Propene acid is the most common alkyl esters, methyl, butyl, ethyl and ethylhexyl acrylates.
Propene acid and its esters are used in various productions to form homopolymers or copolymers, by reacting them in double bonds to form polyPropene acid or other monomers such as acrylamide, vinyl,
Propene acid is combined with styrene and butadiene to produce plastics, adhesives, coatings, elastomers, as well as paints and floor varnishes.
Propene acid Substituents:
The substituent Propene acid may be present as a carboxyalkyl group as a continuation of the removal of an acyl group or molecular group.
Propene acid Safety:
Propene acid is a very serious irritant to the skin and respiratory tract.
Eye contact is extremely inconvenient and can cause irreversible damage.
Propene acid (propenoic acid) ; Propene acid is an organic and strong acid.
They are colorless and sharp-smelling liquid acids at room conditions.
Usage areas
Propene acid is the starting material in the production of polymers.
They are used in the production of many materials such as plastics, coatings, adhesives, paint and varnish.
Propene acid is the raw material of weaving fiber.
Propene acid is used in the paper industry.
Optical instruments are used as the main raw material in jewelery making.
In industry, Propene acid is obtained by the reaction of acetylene and carbon monoxide with water in the presence of a nickel catalyst or by the hydrolysis of acrylonitrile compounds.
Propene acid is the starting material in the production of polymers.
Acrylic compounds Acrylic compounds are the raw material of various compounds such as molded building materials, optical instruments, jewellery, adhesives, coating materials and textile fibers.
For example, orlon and acrylan are the trade names of acrylic yarns, and plexiglass is the trade name of glass-like acrylic materials.
The main members of the family of polymers known as polyacrylic are acrylic and methPropene acids.
The methyl esters of these acids easily polymerize in the presence of peroxide catalysts.
Propene acids are colorless and pungent-smelling acids that exist as liquids at room temperature and pressure.
There are 2 commercial grades, which are used for esterification (94%) and used to make water-soluble resins (98%-99.5%).
Propene acid polymerizes easily when exposed to light, heat or metal. Bi x indicator should always be present for polymerization.
Paint color appears in every aspect of our lives.
Today, its usage areas are expanding and its consumption is gradually increasing.
Propene acid is a chemical coating material that provides protection against external factors by forming a thin film layer on the surface on which the paint is applied, as well as giving the surface a decorative feature.
A paint formulation consists of a mixture of several materials.
Basically, there are four main elements in the structure of the paint.
These; binders, pigments, additives and solvents.
The usage rates of these materials vary for different types of paints.
Pigments are organic and inorganic substances that provide color, covering and protection to the paint.
Pigments are substances that are insoluble in any solution.
Those used to give color are called color pigments, those used for filling power and cost reduction are called fillers.
Fillers can make up 20-50% of paints.
These substances are used in paint formulations to control rheological properties, reduce gloss, increase mechanical properties, or improve the barrier properties of the paint film.
Titanium dioxide, iron oxide, zinc oxide, zinc phosphate are examples of commonly used pigments.
Titanium dioxide is the most common pigment used in paint.
Calcium and barium compounds, calcite, dolomite, gypsum, talc and limestone are examples of fillers.
Calcite is the most common filler used in paint.
Turkey's paint industry is Europe's 6th largest paint producer based on total production.
While the rate of imported raw materials is approximately 65%, Turkey's paint industry is dependent on foreign sources.
Considering the increase in production, foreign dependency in raw materials is increasing day by day.
The most common type of dispersion additive used for inorganic pigments in water-based paints is polyelectrolytes.
They are divided into inorganic and organic polyelectrolytes.
Examples of organic polyelectrolytes are polyPropene acids (PAA) and acrylic-maleic anhydride P(AA-MA) copolymers.
PolyPropene acids and their derivatives are used as thickening, dispersing, suspending and emulsifying agents in disposable diapers, ion exchange resins, coatings; It is used in the pharmaceutical, cosmetic and paint industries.
Propene acid and P(AA-MA) derivatives with molecular weights between 1,000 and 20,000 g/mol are the most commonly used dispersants in the paint industry.
These substances are neutralized with ammonium, sodium or potassium hydroxide to ensure their solubility in water.
The sodium salt of polyPropene acid (NaPAA) is the most widely used dispersant agent in water-based paint formulations.
Propene acid is generally produced by free radical polymerization method.
Polymers with molecular weights from a few thousand to several hundred thousand can be obtained.
The molecular weights of PAAs, which are used as the most common dispersants in the paint industry, are between 1,000 and 20,000 g/mol.
The molecular weight can be controlled by adjusting the amount of initiator and chain transfer agent.
controlled radical polymerization; There are three different types: nitroxide-mediated polymerization (NMP), atom transfer radical polymerization (ATRP), and reversible addition-fragmentation chain transfer (RAFT).
In the production of Propene acid by NMP polymerization, there is a problem of degradation of nitroxide in an acidic medium.
In the atom transfer radical polymerization of Propene acid, metal attachment to the polymer cannot be controlled.
Therefore, the most suitable method to produce polyPropene acid with low molecular weight and low PDI value is the reversible addition-fragmentation chain transfer (RAFT) method.
In this study, the stabilization of water-based paint formulations using NaPAA and acrylic-maleic anhydride copolymer sodium salt (NaP(AA-MA)) as dispersant was studied.
Propene acid was synthesized from the controlled radical polymerization of Propene acid with the "Reversible addition-fragmentation chain transfer" method and from the controlled radical copolymerization of P(AA-MA), acrylic and maleic anhydride with the same method.
NaPAA and NaP(AA-MA) were obtained from neutralization of PAA and P(AA-MA) with sodium hydroxide (32% by weight).
NaPAA, to determine the most suitable polymerization parameters; It was synthesized in four different ways by varying the amount of chain transfer agent, changing the ratio of initiator and monomer, changing the feed time of monomer and initiator, and changing the amount of solvent.
In addition, AA/MA: 1:1 and AA/MA: 1:0.5 ratios were synthesized to determine the desired Propene acid-maleic anhydride monomer ratio.
In addition, AA/MA: 0.5:1 ratio was tried to be synthesized, but the product crystallized due to the tendency of high amount of maleic anhydride to crystallize at room temperature.
The synthesized samples were structurally determined by FTIR.
The FTIR spectrum gave the expected peaks due to the chemical structure of PAA, NaPAA, P(AA-MA) and Na(AA-MA).
The solid contents of the synthesized polymers were determined with a rapid solids meter.
The Brookfield viscosities of the polymers were measured at 6 rpm at 20°C.
Molecular weight and molecular weight distributions were determined by 4-way RALS and GPC with LALS, RI, UV and viscometer detectors.
The amount of unpolymerized Propene acid monomer in the synthesized PAAs was determined by HPLC.
The percent conversion of Propene acid was calculated using the amount of unpolymerized Propene acid monomer.
According to the percentage conversions of the calculated Propene acid; As the amount of NaHyp used as the chain regulating agent and the solution used increase, the conversion increases.
When the APS/AA ratio is 5, 6 and 7.5%, over 94% monomer conversion can be obtained.
When the initiator feed time was increased from 4.5 hours to 5.5 hours, the monomer conversion remained almost the same, and the highest monomer conversion was achieved with 98.72% when the initiator feed time was 6.5 hours.
1H-NMR analyzes were performed to determine the Propene acid and maleic anhydride monomer ratios of the synthesized NaP(AA-MA) copolymers.
Copolymer samples dried in microwave oven were dissolved in deutero water and given to NMR device.
Although the theoretical maleic anhydride monomer ratio of C1_Na copolymer is 33%, according to the 1H-NMR analysis results obtained; In the C1_Na copolymer with an AA/MA monomer ratio of 1:0.5, the ratio of maleic anhydride monomer is 23% and the Propene acid monomer ratio is 77%.
In addition, although the theoretical maleic anhydride monomer ratio of the C2_Na copolymer, which is another synthesized copolymer, is 50%, according to the 1H-NMR analysis results; The ratio of maleic anhydride monomer is 38% and Propene acid monomer ratio is 62% in the C2_Na copolymer with an AA/MA monomer ratio of 1:1.
The reason for this difference between the theoretical and actual monomer ratios is steric hindrance.
Maleic anhydride exhibits little tendency to copolymerization in aqueous media.
In the propagation step of the copolymerization, the monomer molecule is sterically hindered by the propagating radical group.
Thus, the propagation step of the copolymerization takes place extremely slowly.
To determine the dispersion efficiency, an aqueous mixture containing 5 micron calcium carbonate with a solid content of 66% was prepared.
Then, the aqueous mixture and the synthesized NaPAA or NaP(AA-MA) dispersing agents were placed in a dispersion container and mixed with a mechanical mixer at 2000 rpm for 20 minutes until a homogeneous mixture was formed.
To determine the dispersion efficiency of NaPAA polymers and NaP(AA-MA) copolymers, the viscosities of calcite slurries were measured with a Brookfield DV-II model viscometer at 20°C at 60 rpm.
Viscosities were recorded to form the slope containing varying amounts of NaPAA and NaP(AA-MA) dispersing agent versus viscosities of calcite slurries.
To examine the stabilization of calcite slurries with varying amounts of NaPAA or NaP(AA-MA) added as a dispersing agent, the zeta potential of the slurry was measured with a zeta potential meter.
Then, to examine the performances of water-based paint formulations, a sample water-based plastic paint formulation with a PVC value of 74 and prepared with NaPAA polymers or NaP(AA-MA) copolymers as dispersing agent was selected.
Grindometer measurements of paint formulations were performed to confirm the fineness of the dispersion and to detect oversized particles in the paint dispersion.
Paint films were applied to the covering cards.
In the next step; In order to calculate the opacity of the prepared paints, the light reflection intensities of the black and white areas of the cards were measured with a spectrophotometer.
In order to determine the dispersion and stabilization activities of the synthesized NaPAA polymers and NaP(AA-MA) copolymers in the paint, the initial viscosities of the paint formulations were measured with a Brookfield DV-II model viscometer.
The changes in the rheological stability of the prepared paint formulations over time and under temperature were determined by storing them for one month at 52±1°C and measuring Brookfield viscosities at 20°C, one week apart.
Measurement of storage viscosities explains that paint formulations improve dispersion efficiency as the molecular weight and molecular distribution of the polymeric dispersing agent decrease.
Sodium hypophosphite can be used as a chain modifier in a mixture of isopropyl alcohol and water to easily obtain NaPAA, which has a low molecular weight and a narrow molecular weight distribution.
In addition, the feed time of the monomer and initiator affects the molecular weight and molecular weight distribution of NaPAA.
As the feeding time increased, the molecular weight decreased and the molecular weight distribution narrowed.
In addition, NaP(AA-MA) with 1:0.5 AA/MA monomer ratio offers better storage stability performance when used as a dispersing agent instead of NaPAA in water-based paint formulations
Propene acid undergoes undesirable reactions during its manufacture to form higher molecular weight compounds.
Uncontrolled, these reactions can cause sludge deposits and loss of recovery.
Current industry standard inhibitor treatments are only partially effective, causing a unit to combat contamination issues.
Nalco Water technology addresses the limitations of standard inhibitors and offers Propene acid manufacturers a more effective solution and competitive advantage.
Propene acid is produced from ethylene and propylene, a byproduct of gasoline production:
CH2=CHCH3 + 3⁄2 O2 → CH2=CHCO2H + H2O
Since propane is a significantly cheaper raw material than propylene, significant research work is being done to develop a process based on the one-step selective oxidation of propane to Propene acid.
Carboxylation of ethylene to Propene acid under the supercritical condition of carbon dioxide is thermodynamically feasible once an efficient catalyst has been developed.
Since Propene acid and its esters have long been commercially valuable, many other methods have been developed, but most have been abandoned for economic or environmental reasons.
An early method was the hydrocarboxylation of acetylene ("Reppe chemistry"):
HCCH + CO + H2O → CH2=CHCO2H
This method requires nickel carbonyl and high carbon monoxide pressures.
It was once produced by the hydrolysis of acrylonitrile derived from propene via ammoxidation, but has been abandoned because it constitutes a method of cogeneration of ammonium derivatives.
Other now-abandoned precursors for Propene acid include etenone and ethylene cyanohydrin.
The Dow Chemical Company and its partner OPX Biotechnologies are investigating the use of fermented sugar to produce 3-hydroxypropionic acid (3HP), an Propene acid precursor.
The aim is to reduce greenhouse gas emissions.
Reactions and uses
Propene acid undergoes typical reactions of a carboxylic acid. When it reacts with an alcohol, it forms the corresponding ester.
Esters and salts of Propene acid are collectively known as acrylates (or propenoates).
The most common alkyl esters of Propene acid are methyl, butyl, ethyl and 2-ethylhexyl acrylate.
Propene acid and its esters combine easily with themselves (to form polyPropene acid) or with other monomers (for example, acrylamides, acrylonitrile, vinyl compounds, styrene and butadiene) by reacting at their double bonds to form homopolymers or copolymers used in manufacturing.
various plastics, coatings, adhesives, elastomers, as well as floor varnishes and paints.
Propene acid is a compound used in many industries, such as the diaper industry, the water treatment industry, or the textile industry.
Propene acid is estimated that the worldwide consumption of Propene acid will exceed an estimated 8,000 kilotonnes by 2020.
This increase is expected to result from the use of this product in new applications, including personal care products, detergents and products.
Used for adult incontinence.
Substitutions Substitution
Exclusively, Propene acid may exist as an acyl group or a carboxyalkyl group depending on the removal of the group from the molecule.
More specifically, these are:
Acryloyl group by removal of -OH from carbon-1.
The 2-carboxytenyl group with the removal of a −H from carbon-3. This substituent group is found in chlorophyll.
Propene acid acts as a precursor in the production of 3-hydroxypropionic acid.
Propene acid is used in the preparation of water-absorbing resins.
Propene acid reacts with alcohols to prepare the corresponding esters.
Propene acids esters are used as raw materials for synthetic resins, rubbers, coating adhesives, water-based paints, floor varnishes and adhesives.
Propene acid is also used to form homopolymers or copolymers by reacting with other monomers such as acrylamides, acrylonitrile, vinyl, styrene and butadiene.
Propene acid (propene acid) is a clear, colorless, corrosive and flammable liquid, acrid/sharp small and miscible with water, alcohol, ether, benzene, chloroform and acetone.
Propene acid is a versatile and valuable industrial chemical as it is a chemical intermediate used in the manufacture of many industrial and consumer products.
Miscible with alcohol, ether and many other organic solvents
Highly refractive, flammable, colorless liquid
Clear and colorless liquid, which finds widespread use thanks to its chemical structure that allows easier combination with large chain or polymer-forming compounds.
miscible with water
Propene acids are colorless and pungent-smelling acids that exist as liquids at room temperature and pressure.
Propene acid has 2 commercial grades, one used for esterification and one used to make water-soluble resins.
Propene acid polymerizes easily when exposed to light, heat or metal.
