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PVA 1788

CAS Number: 9002-89-5
Formula: (C2H4O)x

PVA 1788 (PVA BP17)
PVA 1788 (PVA BP17) has excellent film forming,, and properties.
PVA 1788 is also resistant to oil, grease and.
PVA 1788 (PVA BP17) is odorless and nontoxic.
PVA 1788 has high tensile strength and flexibility, as well as high oxygen and aroma barrier properties.
However these properties are dependent on , in other words, with higher humidity more water is absorbed.
The water, which acts as a plasticiser, will then reduce its tensile strength, but increase its elongation and tear strength. PVA is fully degradable and is a quick dissolver. PVA has a melting point of 230°C and 180190°C for the fully hydrolysed and partially hydrolysed grades. It decomposes rapidly above 200°C as it can undergo at high temperatures.
PVA 1788 (PVA BP17) is an material but exhibits as the groups are small enough to fit into the lattice without disrupting it.

Uses：
Preparation of is the largest use for polyvinyl alcohol in the U.S. and western Europe.
PVA 1788s use as a polymerization aid is the largest market in China.
In Japan the major use is vinylon fiber production.

Some other uses of PVA 1788 (PVA BP17) include:
-Adhesive and thickener material in latex paints, paper coatings, hairsprays, shampoos and glues.
-Textile agent
-barrier in (PET) bottles.
-for use as synthetic vessels in flow testing.
-Movie and children's play or slime when combined with .
-Feminine hygiene and adult incontinence products as a plastic backing sheet.
-As a because materials such as do not stick to it.
-As a water-soluble film useful for packaging.
-As fiber reinforcement in concrete
-As a surfactant for the formation of polymer encapsulated nanobeads
-Used with polyvinyl acetate to make Elmer's glue
-Used in eye drops and hard solution as a lubricant.
-Used in protective chemical-resistant gloves
-Used as a for specimen collection, especially stool samples
-When doped with iodine, PVA can be used to polarize light.
-As an agent in medical procedures

Polyvinyl alcohol is high polymer with excellent characters to dissolve easily in water but not to dissolve in common organic solvent and organic acids, and with excellent film-forming property,oil resistant, chemical-resistant.
PVA 1788 can react with formaldehydes to form polyvinyl acetal.
The PVA production facilities of our company have been perfecting day by day with the long-term absorption and technological transformation on the basis of importing the complete set of technology from European Company.
PVA produced by our company is good in performances and stable in quality.
PVA 1788 enjoys a great reputation both at home and abroad.

Application
Preparation of polyvinyl butyral is the largest use for polyvinyl alcohol in the U. S. And western Europe.
PVA 1788s use as a polymerization aid is the largest market in China.
In Japan the major use is vinylon fiber production.

Architectural coatings commonly use Polyvinyl Alcohol PVA 1788 and PVA 1799.
Polyvinyl Alcohol is derived from the hydrolysis of Polyvinyl Acetate, and can not derived by the polymerization of Vinyl Alcohol.
Because Vinyl Alcohol is very unstable, there can be no free Vinyl Alcohol Monomer.
The formula of Polyvinyl Alcohol is (CH2CH)OH, wherein the degree of hydrolysis and degree of polymerization has a great influence on the physical properties of Polyvinyl Alcohol.
The polymerization degree of the Polyvinyl Alcohol can be divided into a high polymerization degree, medium polymerization degree and low degree of oligomerization, and recently, the development of an ultra-high degree of polymerization products.
There are three typically kinds of alcoholysis, namely, 78 %, 88 % and 98 %.

The complete alcoholysis of Polyvinyl Alcohol is 98 % to 100 %, partial alcoholysis of alcoholysis typically is 87 % to 89 %.
For convenience, we often fetching thousands of polymerization degree, rounded at the front, percentages in the back alcoholysis.
Therefore, PVA 1788 means that polymerization is 1700, with diethylene glycol 88 %, PVA 1799 means that polymerization is 1700, with diethylene glycol 99 %.
PVA 1788 is with good water solubility, whether in cold water, was quickly dissolved in hot water, but PVA 1799 only dissolves in hot water at 95 ℃ or above.
Due to Polyvinyl Alcohol PVA to neutral, at the time of dissolution does not need special corrosion requirements, but it’s best to use stainless steel or enamel reaction kettle, because these materials will not rust and contamination of the solution.

PolyvinylAlcohol PVA 1788 and PVA 1799 can be used for emulsion polymerization of Vinyl Acetate emulsion stabilizer.
Polyvinyl Alcohol can be used in the manufacturing of water-soluble adhesives, and can be used as modification of starch adhesive agents.
And also can be used to preparation of photosensitive adhesive and benzene class solvent resistant sealant.
Polyvinyl Alcohol also can be used as release agents, dispersants and so on.

Polyvinyl alcohol (abbreviated as PVA) is a kind of water-soluble resin produced by polymerization and alcoholysis of vinyl acetate.
Due to its unique features of high cohesiveness, membrane tenacity, smoothness, solvent resistance, gas inhibitor, wear resistance, protective colloid, and waterproof after specially treated, polyvinyl alcohol is widely applied in textile, building, papermaking, packing, timber processing, agriculture, printing, polymer chemical, ceramic, iron and steel, electronic, electrolytic, electroplating and other industries.
Liwei PVA can produce PVA 1799 to replace Kuraray PVA 117, and PVA 1788 to replace Kuraray PVA 217.

1,PVA 1788 is mainly used for the feedstock of vinylon fiber.
The vinylon staple yarn and vinylon tow-to yarn manufactured from the PVA1788 exhibits white color,high strength,perfect hygroscpy,abrasion resistance,sunshine resistance and corrosion resistance.
They can be blended with cotton,wool and glue fiber for weaving separately ,which is widely used for clothing ,tarpaulin ,tire cord ,fishingnets and ropes, and they are also an idea substitute of asbestos.
2,PVA1788 also can used in the field of paper manking,especially used as surface sizing.
With good adhesion,good filming and strengthing to paper, PVA water solution can be used as surface sizing to substitute casein and starch which is more expensive and easy to be corrosible.
The whiteness and gloss of the wove paper coated with PVA solution will be perfect,not easy to be crimped and with lower cost.
Therefore,PVA 1788 is widely used in art paper ,craft paper,clothing paper and other high-grade paper.
3,PVA 1788 can also used as paper bonding ,vinyl acetate emusification &polymerization,inorganic binder , construction material additives,inorganic binder,cosmetic,medicine and temporary material additives etc.

PVA 1788 & PVA 1799 Specification:
-PVA1788 is partially hydrolyzed:
Appearance:White crystalline powder
Degree of alcoholysis (mol/mol) %:86.0-90.0
Viscosity mpa.s:20.0-28.0
Volatiles (%) max:5.0
Sodium Acetate(%) max:2.5
PH value:5-7

We supply PVA 1788, PVA 0588, PVA1799 can replace PVA 217 & PVA 205& PVA117.
The feature of the products:
1.high tensile strength and flexibility
2.high oxygen and aroma barrier properties3.elongation and tear strength

Property
Solubility: soluble in water at room temperature, quick solubility, high alcohol.
Membrane made:The solution is easy to form the film, the film is superior tensile strength and abrasion resistance.
Viscosity of aqueous solution: Viscosity of aqueous solution Degree is due to the temperature of polymerization change. Lower than other water-soluble polymer.
Contains its own sales foam, has the advantage of less blistering, lower cost.

Form: Powder
Color: White
Formula: (C2H4O)x
Melting Point: 200 deg C
Density: 1.19 g/cm3
Boiling Point: 228 deg C
Flash Point: 79.44 deg C (174.99 deg F; 352.59 K)
Degree of alcoholysis (mol/mol) %:99.0-100
Viscosity mpa.s:20.0-28.0
Volatiles (%) max:5.0
Sodium Acetate (%) max:2.5
PH value:5-7

With alkali lignin and PVA as the primary materials, glutaraldehyde as the cross-linker, and glycerin as the plasticizer, alkali lignin/PVA cross-linking reaction film was prepared by casting.
The process conditions were evaluated one at a time for different variables.
Mechanical properties of the composite film were tested.
The performance of the reaction film was analysed by XRD, TG, SEM, and FT-IR.
The results showed that when the mass ratio of alkali lignin/PVA was 1/5, glutaraldehyde content 1.67%, and glycerol content 7.1% (w/w) of the dry matter, respectively, the reaction film had satisfactory mechanical properties.

Under the best conditions, the mechanical properties of the reaction film were better than that of pure PVA film.
The thermal stability of the reaction film was higher than the stability of PVA film.
Compared with pure PVA film, the crystallinity of the reaction film decreased a little.
SEM images indicated that compatibility of alkali lignin and PVA was good.
The FT-IR analysis showed that a cross-linking reaction occurred between alkali lignin and PVA(1788).
But the aldol reaction between the lignin and PVA(1788) was weak.

Polyvinyl alcohol PVS is a type of the water-soluble pitch produced by polymerization and alcoholysis of vinyl-acetic ester.
Thanks to the high knitting ability, a sticky blanket, an elastichneost, uniformity, resistance to water solutions, wear resistance, a protective colloid, water resistance after special processing polyvinyl alcohol is widely used in the textile industry, construction, paper production, packing, in wood processing, agriculture, the printing industry, production of polymeric products, ceramics, iron and steel, electronics, electrical equipment and other areas.

PVA 1788 & PVA 1799 Application:
PVA 1788 is chiefly used for coatings, adhesive, dispersing agents, emulgents, textile sizing materials, sensitize coatings and so forth.
PVA 1799 is chiefly used to produce textile sizing materials, coatings, adhesive and it is widely used for paper processing, emulsifying agents, dispersants and blocking colloids.
Besides, it can be employed as membranes, soil modifiers,and production materials of vinylon fiber.etc.

PVA 1788 by Liwei chemical (Sinochem) is partially hydrolyzed, polyvinyl alcohol high polymer grade.
Soluble in water while insoluble in organic solvent and organic acids.
Exhibits excellent film-forming property, oil resistance, chemical resistance and good stability.
PVA 1788 can react with formaldehydes to form polyvinyl acetal.
PVA 1788 by Liwei chemical (Sinochem) is recommended for coatings, adhesive, dispersing agents, emulgents, textile sizing materials, sensitize coatings and so forth.

Polyvinyl alcohol is a resin with Avirulent insipidity, no pollution, can dissolve in the 80-90C water.

-Solution has good adhesion and film.PVA can be seen as a linear polymer with a hydroxyl polymer.
-Hydroxyl of molecules which has high activity can be a typical chemical reaction of low-alcohol, such as esterification, etherification, acetal, etc and can also react with a number of inorganic compounds or organic compounds.

Solubility
The Polyvinyl alcohol powder can be dissolved in water.
PVA with Less than 95%alcoholysis degree can be dissolved in water at room temperature and PVA with more than 99.5% alcoholysis degree can only be dissolved in hot water above 95C.

Thermal Stability
The heat can make PVA soften and there is no significant change below 40C but 160C or more, for a long time heated , PVA 1788 will gradually be colored .
when 220C above PVA 1788 is decomposed to produce water, acetic acid, acetaldehyde and propylene aldehyde.

Application
PVA Is mainly used in textile warp sizing agent, fabric finishing agent, vinylon fiber raw materials;
Architectural decoration industry external walls, 107 glue, coatings, adhesives;
The chemical industry used as polymer emulsifier and dispersing agent and polyvinyl formal,shrink acetaldehyde, butyral resins; Paper industry is used as paper adhesive;
Agriculture used to soil amendments, pesticides adhesion synergistic agent and polyvinyl alcohol film;
Can also be used for daily cosmetics and high frequency quenching agent, etc.

PVA 117 & PVA 217 Application:
PVA 117 is chiefly used to produce textile sizing materials, coatings, adhesive and PVA 1788 is widely used for paper processing, emulsifying agents, dispersants and blocking colloids.
Besides, PVA 1788 can be employed as membranes, soil modifiers,and production materials of vinylon fiber.etc.
PVA 217 is chiefly used for coatings, adhesive, dispersing agents, emulgents, textile sizing materials, sensitize coatings and so forth.

Product Description:
We are one of the eminent importers and suppliers of specially formulated Alcohol Powder in different grades.
The chemical is water soluble, which is used as a thickener in some suspensions and emulsions.
Amorphous in structure, it can be drawn into a semi-crystalline fiber but the melting point of the crystallites is above the thermal degradation temperature.

Polyvinyl alcohol (PVA) is a kind of heavy polymer.
PVA 1788 is usually a white or slight yellow floccules,flake,granular or powder in apperance.
PVA is non-toxic,insipid and non-polluting.
PVA is a kind of water-soluble resin with good chemical stability.
PVA 1788 also has good adhesion,film-forming ability, insulation, oil resistance, abrasion resistance and gas berrier properties, and has typical chemical properties of polyols and can make esterification,etherification, acetalization reactions.
PVA 1788 usually used into the Textile industry,construction and decoration industries,chemical industry, pape-rmaking,agriculture, petroleum exploitation, and also cosmetics,pharmaceuticals,printing,ceramics,steel,electronics,electroplating, and so on.
Polyvinyl alcohol (PVA) powder series of products is specialized in construction industry as an additive in all kinds of dry powder putty, dry mortar, tile adhesive, especially used for building putty and Mortar, improving the flexibility, water retention and increase viscosity of mortar and putty.
PVA 1788's adhesion very good and used to be widely with paper making, sizing material for textile, adhesive, film, and dry mortar field.

Polyvinyl alcohol is obtained by the hydrolysis of polyvinyl acetate, PVA 1788 can not be obtained directly from the polymerization of vinyl alcohol, because vinyl alcohol is very unstable. Free vinyl alcohol monomer can not be existed.
The molecular formula weight of PVA is (C2H4O)x.
PVA 1788s physical properties can be greatly affected by the degree of hydrolysis and polymerization degree.
PVA 1788s degree of polymerization of polyvinyl alcohol can be divided into high degree, medium degree and low degree of polymerization.
Recently a new kind of products with ultra-high degree of polymerization is developed.
There are usually three kinds of hydrolysis degrees, that is 78%, 88% and 98%. 98%-100% is complete alcoholysis PVA, 87%-89% is part alcoholysis PVA.
PVA1788 usually means the polymerization degree is 1700 while the hydrolysis degree is 88%.
PVA 1799 means the polymerization degree is 1800 while the hydrolysis degree is 99%

Polyvinyl alcohol solution of complete alcohol solution is 98 % to 100% , alcoholysis alcoholysis is usually part of 87% to 89% , in order to facilitate said polymerization degree often take hundreds and thousands digits on the front, the percentage of alcohol solution of the behind , thus PVA-1788 means that the degree of polymerization of 1700 , degree of hydrolysis of 88%, PVA-1799 indicates a degree of polymerization of 1700 , degree of hydrolysis of 99 %.
PVA 1788 is partly alcoholyzed product while PVA1799 is completely alcoholyzed product.
Then what is partly alcoholysis and what is complete alcoholysis?
Complete alcoholysis means this kind of PVA will not be soluble unless the heat is up to 95 degree.
While for partly alcoholyzed PVA, PVA 1788 can be soluble when the temperature is 85 degree.

Recently a new kind of products with ultra-high degree of polymerization is developed.
There are usually three kinds of hydrolysis degrees, that is 78%, 88% and 98%. 98%-100% is complete alcoholysis PVA, 87%-89% is part alcoholysis PVA.
PVA 1788 usually means the polymerization degree is 1700 while the hydrolysis degree is 88%.
PVA 1799 means the polymerization degree is 1800 while the hydrolysis degree is 99%

The aim of this work is to study the potential degradation of polyvinyl alcohol (PVA) by a novel fungus Eutypella sp.
BJ isolated from soil compost.
When PVA 1788 was cultured on a semi-synthetic medium containing PVA at 30 °C and 160 rpm for 8 days, the removal rates of PVA 1788, 1799 and 2488 reached 87.40%, 86.31% and 44.80%, respectively.
Fourier transform infrared spectroscopy (FTIR) indicated that some substances containing carbonyl groups (likely aldehydes or ketones) might have been produced during the biodegradation process.
These results indicate that the isolate has potential for degrading PVA.
This study provides the first demonstration that Eutypella has the ability to assimilate PVA.

Note: the difference of PVA properties is mainly determined by PVA 1788s polymerization degree and alcoholysis degree.

The influence of polymerization degree on its properties:
With the increase of polymerization degree, molecular weight and viscosity
The solubility and permeability decrease with the increase of polymerization degree
The characteristics of protective colloid increase with the increase of polymerization degree

PVA resin is a kind of heavy polymer, it is non-toxic, insipid and harmless.
PVA is water-soluble and the solvent provide good viscosity and film building.
PVA 1788 can withstand oils, lubricants, hydrocarbons and most other organic solvents.
PVA has better chemical stability and insulatibility and provide ease in firm building; PVA 1788 possess the typical chemical properties of polyols and can carry out process of esterification, etherealization, aceatalization etc.

Fucntion:
Used in the manufacture of polyvinyl acetal, gasoline resistant pipes and vinylon synthetic fibers, fabric treatment agents, emulsifiers, paper coatings, adhesives, etc.

Adhesive
Raw material of polyvinyl alcohol panel and PVA thin film
Paint and Coatings
Medicinea cosmetic and functional materials
Emulgator and dispersing agent.

Storage The material is very stable with no risk of molding and deteriorating.
Under dry condition.
Indefinite when protected from moisture.

Pouring a certain amount of water into the dissolving tank, the water temperature should be below 30 a, then start the blender and pour into PVA slowly, the filling speed with PVA should be keep into 10 kilograms per minutes advisable.
Confirm the PVA powder has fully dispersed (about 10-20 minutes) then heat the solution, and it can be completely dissolved when heat to 90 a about 1 hour.

Method of analysis: Viscosity is measured in 4% aqueous solution at 20 a.
By a Brook field type viscosity meter.
PH is measured in 4% aqueous solution at 20 a Ash expressed as Na2O.

Uses: It can be used as emulsifying agent and dispersing agent for polymerization.
Pva 1788 is also used as adhesion agent to replace starch.
Pva is widely used in textile, paper making, building materials, packing, glass, and medicine.
also pva 1788 can be used as textile warp size, fabric finishing agent, reagent and additive in polymerization for industry of fine chemicals, adhesion agent for construction coating, and packing material film.

Product use
In textile industry ,PVOH is mainly used as a warp dressing agent, textile finishing agent and the raw material of vinylon.
In construction and upholstery industry 107 gule, PVA 1788’s used as an additive of cement and mortar, inner and outer wall paints, and moulding board binder; and in chemical industry.
PVA 1788’s used as a polymer emulsifying agent, dispersing agent and used to produce PVOH formal, PVOH acetal and PVOH butyral.
PVA 1788’s used as an adhesive in lumbering and paper-marking industies, used as a soil improving agent, pesticide reinforcing agent and PVOH thin film in agriculture, and used as a well-fixing agent in pertroleum exploitation .
PVA 1788 can also be used into cosmetic, medicine, printing, ceramics ,steel-marking, electronics and plating.

PVA 1799 product Feature
Polyvinyl alcohol has excellent film forming, emulsifying, and adhesive properties.
PVA 1788 is also resistant to oil, grease and solvent.
PVA 1788 is odorless and nontoxic.
PVA 1788 has high tensile strength and flexibility, as well as high oxygen and aroma barrier properties.

However these properties are dependent on humidity, in other words, with higher humidity more water is absorbed.
The water, which acts as a plasticiser, will then reduce PVA 1788s tensile strength, but increase PVA 1788s elongation and tear strength.
PVA is fully degradable and is a quick dissolver.
PVA has a melting point of 230C and 180-190C for the fully hydrolysed and partially hydrolysed grades, respectively.
PVA 1788 decomposes rapidly above 200C as PVA 1788 can undergo pyrolysis at high temperatures.