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NEOPENTYL GLYCOL

 


2,2-dimethylpropane-1,3-diol = Neopentyl glycol = Dimethylolpropan


CAS NO:126-30-7 
EC NO:204-781-0
Linear Formula:(H2C=CHCO2CH2)2C(CH3)2


Neopentyl glycol (IUPAC name: 2,2-dimethylpropane-1,3-diol) is an organic chemical compound. It is used in the synthesis of polyesters, paints, lubricants, and plasticizers. When used in the manufacture of polyesters, it enhances the stability of the product towards heat, light, and water. By esterification reaction with fatty or carboxylic acids, synthetic lubricating esters with reduced potential for oxidation or hydrolysis, compared to natural esters, can be produced.


Reactions
Neopentyl glycol is synthesized industrially by the aldol reaction of formaldehyde and isobutyraldehyde. This creates the intermediate hydroxypivaldehyde, which can be converted to neopentyl glycol with either excess formaldehyde or by palladium on carbon hydrogenation. 


Neopentyl glycol is used as a protecting group for ketones, for example in gestodene synthesis.


A condensation reaction of neopentyl glycol with 2,6-di-tert-butylphenol gives CGP-7930.


Organoboronic acid esters of neopentyl glycol are useful in the Suzuki reaction


Research
Neopentyl glycol has been reported that plastic crystals of neopentyl glycol exhibit a colossal barocaloric effect (CBCEs), which is a cooling effect caused by pressure-induced phase transitions. The obtained entropy changes are about 389 joules per kilogram per kelvin near room temperature. This CBCE phenomenon is likely to be very useful in future solid-state refrigeration technologies.


Properties
Chemical formula        C5H12O2
Molar mass        104.148 g/mol
Melting point        129.13 °C (264.43 °F; 402.28 K)
Boiling point        208 °C (406 °F; 481 K)
Solubility in water        good
Solubility        soluble in benzene, chloroform, very soluble in ethanol, diethyl ether


Neopentyl glycol is a propane-1,3-diol carrying two methyl groups at position 2.
Neopentyl glycol is a white crystalline solid. Melting point 130°C.


Industry Uses in Neopentyl glycol 
Adhesives and sealant chemicals
Agricultural chemicals (non-pesticidal)
Dyes
Fillers
Fuels and fuel additives
Intermediates
Lubricants and lubricant additives
Paint additives and coating additives not described by other categories
Plasticizers
Processing aids, specific to petroleum production


Consumer Uses in Neopentyl glycol
Adhesives and sealants
Agricultural products (non-pesticidal)
Fabric, textile, and leather products not covered elsewhere
Lubricants and greases
Paints and coatings
Paper products
Personal care products
Plastic and rubber products not covered elsewhere
polyesters


Industry Processing Sectors
Adhesive manufacturing
All other basic organic chemical manufacturing
All other chemical product and preparation manufacturing
Food, beverage, and tobacco product manufacturing
Paint and coating manufacturing
Paper manufacturing
Petrochemical manufacturing
Petroleum lubricating oil and grease manufacturing
Plastic material and resin manufacturing
Plastics product manufacturing
Textiles, apparel, and leather manufacturing
Wholesale and retail trade
personal care and cosmetics
resin manufacturing only


Application: Powder Coatings Resins


Sustainability performance:


Biomass balanced Neopentyl Glycol
Using a biomass balance approach, BASF is replacing a certain amount of fossil raw materials with renewable feedstock
The method is subject to third party certification 


Neopentyl glycol  is the industry standard glycol component in high-quality polyester resins for industrial coatings and fiberglass-reinforced plastics applications. Most polyester resin formulations contain Neopentyl glycol  as the sole glycol component, or it is used in conjunction with a modifying glycol to achieve desired properties.


Neopentyl glycol are the primary components for polyester powder coating resins. 
Neopentyl glycol delivers the overall toughness, stain and detergent resistance, and outdoor weathering performance required of coil coatings for appliances and products for exterior applications. Gel coats containing unsaturated polyesters made from NPG and Neopentyl glycol  provide excellent weatherability and water and stain resistance.


Neopentyl glycol  is also used in polyester polyols for polyurethane coatings for the automotive, industrial maintenance, transportation, and aerospace markets.


Neopentyl glycol  is available in three forms:


Platelets in bags that exhibit excellent caking stability on storage.
Bulk molten shipped in tank trucks that require a heated tank for storage.
Neopentyl glycol , a liquid at or above 38°C containing 90 parts NPG and 10 parts water, is delivered in bulk and can be stored at a much lower temperature than molten NPG.


Applications/uses
Adhesives/sealants-B&C
Architectural coatings
Auto OEM
Auto refinish
Automotive
Building materials
Coil coatings
Construction chemicals
Equipment & machinery
Inks
 
Intermediates
Lubricants
Paints & coatings
Polycarbonate
Polymer modification
Process additives
Protective coatings
Textile
Wind energy


Polyol synthesized by the reaction of isobutyraldehyde with formaldehyde.
Neopentyl glycol is a raw material for polyester resins.


Formula: C5H12O2 / (CH3)2C(CH2OH)2
Molecular mass: 104.2
Boiling point: 210°C
Melting point: 127°C
Density: 1.1 g/cm³
Solubility in water, g/100ml at 20°C: 83
Vapour pressure, Pa at 20°C: 30
Relative vapour density (air = 1): 3.6
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.0
Flash point: 107°C
Auto-ignition temperature: 388°C
Explosive limits, vol% in air: 1.1-11.4
Octanol/water partition coefficient as log Pow: -0.84 


Physical State; Appearance
COLOURLESS-TO-WHITE HYGROSCOPIC CRYSTALS. 


Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 


Chemical dangers
Reacts violently with oxidants.


Neopentyl glycol has two primary hydroxyl groups.
Neopentyl glycol is a white material in flakes. 
Neopentyl glycol is used in saturated polyesters for powder coatings, coil coatings and other stoving enamels, unsaturated polyesters for gel coats and reinforced plastics and in esters for synthetic lubricants.


Used to make plasticizers and polyesters and as modifier of alkyd resins; 
Used in chemical synthesis and in the polymers industry;
 Used to make large scale and fine chemicals, rubber products, plastic products, textiles, leather, fur, wood and wood products, pulp-paper and paper products, non-metallic mineral products (i.e. plasters and cement), in printing and reproduction of recorded media, building and construction work, scientific research and development, and consumer construction chemicals.


Uses
Neopentyl glycol (NPG) is used primarily in base resins for coatings. Important uses are also found in hydraulic fluids, synthetic lubricant oils, greases, metal-working fluids and aircraft engine lubricants. Other outlets include textiles, pharmaceuticals, pesticides, plasticisers and petroleum. 
Neopentyl glycol  is shipped as flake, molten and slurry.


Technology
There are two main routes to Neopentyl glycol using isobutyraldehyde and formaldehyde. In one, the raw materials react with a strongly alkaline catalyst to form Neopentyl glycol. But, large amounts of formate salts are formed as byproduct and the process is only economically viable when a profitable use is found for the formate.


In a second and more common process, the aldolisation reaction is carried out in the presence of an amine catalyst. This is further hydrogenated in the presence of a catalyst and the molten Neopentyl glycol is solidified by means of a flaking roll, or a crystallising or cooling belt.


Neopentyl glycol, also known as Dimethylolpropan, is a colorless-to-white, hygroscopic crystalline, organic chemical compound that is used in the synthesis of paints, polyesters, lubricants, and plasticizers.  The combustible, slightly toxic compound can be harmful if ingested or is absorbed through skin contact.
Neopentyl glycol is known to cause skin and eye irritation.


The chemical formula for Neopentyl glycol is C5H12O2. 
Neopentyl glycol is CAS is 126-30-7. 
The crystalline Neopentyl glycol is synthesized industrially by the aldol reaction of formaldehyde and isobutyraldehyde, which creates the intermediate Neopentyl glycol. 
This can be converted to Neopentyl glycol with either excess formaldehyde or catalytic hydrogenation of the aldehyde group to an alcohol group.


Neopentyl glycol is soluble in water, benzene, chloroform, and very soluble in ethanol and diethyl ether.


The industrial uses for the combustible organic compound include dyes, functional fluids in closed systems, intermediates, lubricants and lubricant additives, paint and coating additives, and processing aids specific to petroleum production.


Consumer uses include adhesives and sealants, paints and coatings, and paper products.


Neopentyl Glycol, NPG (2, 2-dimethylpropane-1, 3-diol) is the standard diol for high performance coating resins. 
The polyesters synthesized by Neopentyl Glycol with saturated or unsaturated di-acids offer a great ingredient for paints, lubricants, plasticizers and fiberglass-reinforced plastics applications. 
Neopentyl Glycol enhances stability toward heat, light, and water.  
Neopentyl Glycol achieves high performance of resins due to its resistance to oxidation, its non-polar chemical nature, and steric retardation of hydrolysis. 
Most polyester resin formulations contain Neopentyl Glycol as the sole glycol component, or feature Neopentyl Glycol in conjunction with a modifying glycol to achieve the desired properties.


Neopentyl Glycol is a white crystalline solid with a melting point of 127⁰C. This solid flake form has a tendency to fuse together and form a block, becoming difficult to separate, transfer, and handle.


There are several forms of Neopentyl Glycol  available for selection, depending on conditions specified for manufacturing and application:
Neopentyl Glycol ,transported at high temperature, ships in heated tank trucks. 
For molten Neopentyl Glycol  to arrive at the plant intact  it is necessary for the heated storage tank to maintain a temperature at or above 140⁰C.


A slurry / suspension form of Neopentyl Glycol  in water (90% NPG by weight) is a liquid at or above 38°C. 
This form of Neopentyl Glycol  ships in bulk at temperatures ranging from 50 – 70⁰C, enabling storage at a much lower temperature than molten NPG, at around 55 – 60⁰C.


Key Applications
Polyester coatings; gel coatings; synthetic marble; polyurethane coatings; synthetic lubricants


Product Description
Neopentyl Glycol  can be used as an intermediate for both plasticizers and for synthetic lubricants. 
In most polyester resin formulations, Neopentyl Glycol  is used as the sole glycol component. 
Neopentyl Glycol offers excellent thermal stability, weathering, and stain resistance.


Title: Neopentyl Glycol
CAS Registry Number: 126-30-7
CAS Name: 2,2-Dimethyl-1,3-propanediol
Additional Names: dimethyltrimethylene glycol
Molecular Formula: C5H12O2
Molecular Weight: 104.15
Percent Composition: C 57.66%, H 11.61%, O 30.72%
Literature References: Prepd from isobutyraldehyde.
Properties: Needles from benzene, mp 127°. bp760 208°. Solubility in water ~65% w/w. Freely sol in alcohol, ether.
Melting point: mp 127°
Boiling point: bp760 208°
Use: In the manuf of plasticizers, polyesters, as modifier of alkyd resins.


About this substance
Helpful information
This substance is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 100 000 to < 1 000 000 tonnes per annum.


This substance is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.


Consumer Uses
Neopentyl Glycol  is used in the following products: adhesives and sealants, coating products and fillers, putties, plasters, modelling clay. 
Other release to the environment of Neopentyl Glycol  is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use, outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials), indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment) and indoor use in long-life materials with high release rate (e.g. release from fabrics, textiles during washing, removal of indoor paints).


Article service life
Release to the environment of Neopentyl Glycol  can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal) and of articles where the substances are not intended to be released and where the conditions of use do not promote release.
Other release to the environment of Neopentyl Glycol  is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials), indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment) and outdoor use in long-life materials with high release rate (e.g. tyres, treated wooden products, treated textile and fabric, brake pads in trucks or cars, sanding of buildings (bridges, facades) or vehicles (ships)).
Neopentyl Glycol  can be found in products with material based on: stone, plaster, cement, glass or ceramic (e.g. dishes, pots/pans, food storage containers, construction and isolation material).


Widespread uses by professional workers
Neopentyl Glycol  is used in the following products: coating products.
Neopentyl Glycol is used in the following areas: scientific research and development.
Other release to the environment of Neopentyl Glycol  is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use, outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials), outdoor use in long-life materials with high release rate (e.g. tyres, treated wooden products, treated textile and fabric, brake pads in trucks or cars, sanding of buildings (bridges, facades) or vehicles (ships)) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).


Formulation or re-packing
Neopentyl Glycol  is used in the following products: polymers.
Release to the environment of Neopentyl Glycol  can occur from industrial use: formulation of mixtures, formulation in materials and in the production of articles.


Uses at industrial sites
Neopentyl Glycol  is used in the following products: polymers, fillers, putties, plasters, modelling clay, laboratory chemicals and non-metal-surface treatment products.
Neopentyl Glycol  is used in the following areas: printing and recorded media reproduction and building & construction work.
Neopentyl Glycol  is used for the manufacture of: plastic products, chemicals, mineral products (e.g. plasters, cement), rubber products, pulp, paper and paper products, textile, leather or fur and wood and wood products.
Release to the environment of Neopentyl Glycol  can occur from industrial use: in processing aids at industrial sites, for thermoplastic manufacture, as an intermediate step in further manufacturing of another substance (use of intermediates), in the production of articles, formulation of mixtures, formulation in materials, as processing aid and as processing aid.


[Chemical Structure]


The chemical formula for Neopentyl glycol (NPG) is C5H12O2, and it is a propane-1,3-diol carrying two methyl groups at position 2.
Neopentyl glycol is soluble in water, benzene, chloroform, and very soluble in ethanol and diethyl ether. 
Neopenty lglycol (NPG) is a unique polyalcohol offering superior performance advantages in many end-use applications due to its high chemical and thermal stability. 
It is a unique diol offering superior performance advantages in many end-use applications. These advantages are derived from its chemical structure. 
The location of the hydroxyl groups on primary carbon atoms allows rapid esterification. 
Additionally, the two methyl groups, instead of the usual two hydrogen atoms, on the alpha carbon atom are responsible for the high chemical and thermal stability of Neopentylglycol and its derivatives.


Application
Neopentyl glycol is used in the synthesis of polyesters, paints, lubricants, and plasticizers. 
When used in the manufacture of polyesters, it enhances the stability of the product towards heat, light, and water. 
By esterification reaction with fatty or carboxylic acids, synthetic lubricating esters with reduced potential for oxidation or hydrolysis, compared to natural esters, can be produced. 
Neopentyl glycol is used primarily in base resins for coatings. In powder coating formulations, Neopentyl glycol offers the additional advantage of providing small differences between the glass transition temperature and melting point.
Important areas of application include general metal, appliance, metal furniture, automotive and machinery coatings. Important uses are also found in hydraulic fluids, synthetic lubricant oils, greases, metalworking fluids and aircraft engine lubricants. Other outlets include textiles, pharmaceuticals, pesticides, plasticizers and petroleum.
High quality Neopentyl glycol is shipped as flake, molten and slurry. 
The high-quality Neopentyl glycol is the component in polyester resins for industrial coatings and fiberglass-reinforced plastics applications, and most polyester resin formulations contain Neopentyl glycol as the sole glycol component, or it is used in conjunction with a modifying glycol to achieve desired properties. 
Neopentyl glycol is also used in polyester polyols for polyurethane coatings for the automotive, industrial maintenance, transportation, and aerospace markets.


Appearance :Crystalline or chunks
Physical State :Solid
Storage :Store at room temperature
Melting Point :123-127° C
Boiling Point :209° C at 760 mmHg
Density :1.06 g/cm3 at 20° C


Neopentyl Glycol can be used in the synthesis of paints, polyesters, plasticizers, and lubricants. Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.


Product Description
Neopentyl Glycol (NEO) is a polyhydric alcohol containing two primary hydroxyl groups. 
Neopentyl Glycol is a white crystalline material in flakes.
Neopentyl Glycol is well known for its advantages providing high UV, hydrolytic and chemical resistance. 
This in combination with excellent balance between hardness and flexibility as well as superior performance in terms of control and reactivity during esterification and curing makes it ideal in several different applications.


Segment Applications
Polyester resins for powder coating, coil coating and can coating
Unsaturated polyesters for gel-coats and reinforced plastics
Alkyd resins, solvent and waterborne
Polyurethanes for coating, foams and elastomers
Lubricant esters


Properties: 
Neopentyl glycol is white crystal solid substance without bad smell. 
Neopentyl glycol is hygroscopic and at the normal temperature, it is mutually dissolved with water and low level ketone and arene compound.


Usage: 
Neopentyl glycol has a wide range of functions, among which the main role is to produce oil freeze alkyd resin, unsaturated polyester resin, flexible soft foam of polyurethane, insulated materials, print inks, synthetic plasticizers, aircraft lubricant agent, surfactant and etc.


Neopentyl Glycol Diheptanoate is an emollient used in skin care products for its properties as a skin conditioning and viscosity increasing agent. It is formed as a combination of neopentyl glycol (film-forming agent and solvent) and heptanoic acid (fatty acid made from grapes), according to CosmeticsCop.com. Neopentyl Glycol Diheptanoate is seen as a good alternative to silicones and is light and velvety on the skin, with excellent spreadability (source).


Functions:


Neopentyl Glycol is an emollient used in skin care products for its properties as a skin conditioning and viscosity increasing agent. 
It is formed as a combination of neopentyl glycol (film-forming agent and solvent) and heptanoic acid (fatty acid made from grapes), according. 
Neopentyl Glycol is seen as a good alternative to silicones and is light and velvety on the skin, with excellent spreadability (source).


Neopentyl glycol is a mixture of texture-enhancing ingredient neopentyl glycol and grape-derived fatty acid heptanoic acid. 
The compound functions as a non-aqueous skin-softening agent and thickener.


A clear, odorless, very light emollient ester that helps to achieve light textures. 
Neopentyl glycol  has great spreadability, a good slip, and a silky skin feel.  
Neopentyl glycol's ideal to solubilize sunscreen agents and fragrances. 
Neopentyl glycol's also touted as a volatile (evaporates from the skin rather than absorbs into it) silicone alternative, especially to replace Cyclomethicone mixes.


IUPAC names
1,3-Propanediol, 2,2-dimethyl-
2,2-Dimethyl-1,3-propanediol
2,2-dimethyl-1,3-Propanediol
2,2-dimethyl-1,3-propanediol
2,2-dimethylpropan-1,3-diol
2,2-Dimethylpropane-1,3-diol
2,2-dimethylpropane-1,3-diol
2,2-dimethylpropane-1,3-diol
2,2-dimethylpropane-1,3-diol (neopentyl glycol)
NEOPENTYL GLYCOL
Neopentyl Glycol
Neopentyl glycol
NEOPENTYL GLYCOL
Neopentyl glycol
Neopentyl Glycol (NPG)
Neopentylglycol
propylene glycol


Other names: 1,3-Propanediol, 2,2-dimethyl-; Dimethylolpropane; Neopentanediol; Neopentylene glycol; 2,2-Dimethyl-1,3-propanediol; Dimethyltrimethylene glycol; Hydroxypivalyl alcohol; NPG; Neol; 1,3-Dihydroxy-2,2-dimethylpropane; 2,2-Dimethyl-1,3-dihydroxypropane; 2,2-Dimethylpropane-1,3-diol; NPG Glycol; 2,2-Dimethyltrimethylene glycol; NSC 55836


SYNONYMS:
1,3-Propanediol, 2,2-dimethyl- [ACD/Index Name]
126-30-7 [RN]
2,2-Dimethyl-1,3-propandiol [German] [ACD/IUPAC Name]
2,2-Dimethyl-1,3-propanediol [ACD/IUPAC Name]
2,2-Diméthyl-1,3-propanediol [French] [ACD/IUPAC Name]
2,2-dimethylpropane-1,3-diol
204-781-0 [EINECS]
4-01-00-02551 [Beilstein]
MFCD00004685 [MDL number]
Neopentanediol
Neopentyl glycol [Wiki]
Neopentylene glycol
Neopentylglycol
NPG Glycol
Propanediol, 2,2-dimethyl-, 1,3-
QI80HXD6S5
TY5775000
UNII-QI80HXD6S5
1,3-Dihydroxy-2,2-dimethylpropane
2, 2-Dimethyl-1, 3-propanediol
2,​2-​dimethylpropane-​1,​3-​diol
2,2-Bis(hydroxymethyl)propane
2,2-Dimethyl-1,3 propanediol
2,2-Dimethyl-1,3-dihydroxypropane
2,2-Dimethyl-1,3-propylene glycol
2,2-Dimethylolpropane
2,2-Dimethyltrimethylene glycol
2,3-Dimethyl-1,3-propanediol
2-ethylpropane-1,3-diol
Dimethyltrimethylene glycol
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:143768
Hydroxypivalyl alcohol

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