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Neopentyl
Glycol
Application,
Process, Patent, MSDS, Company Profile&Consultants, Suppliers, Study
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Neopentyl glycol (IUPAC name 2,2-dimethyl-1,3-propanediol) is an organic
chemical compound. It is used in the synthesis of polyesters, paints,
lubricants, and plasticizers.
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When
used in the manufacture of polyesters, it enhances the stability of the
product towards heat, light, and water.
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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.
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Neopentyl glycol(NPG) 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 catalytic hydrogenation of the aldehyde
group to an alcohol group.
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NPG is
used primarily in base resins for coatings. Important uses are also
found in hydraulic fluids, synthetic lubricant oils and aircraft engine
lubricants. Other outlets include textiles, pharmaceuticals, pesticides
and plasticisers. NPG is shipped as flake, molten and slurry.
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POLYPLEX is a high performance, low colour, medium reactivity casting
resin based on isophthalic Acid and Neopentyl Glycol.
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Neopentyl Glycol is a white crystalline material in flakes or colourless
liquid in molten
form.
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Polycor ISO/NPG series gel coats are formulated to yield high
performance against water and certain chemicals. This series is made
with neopentyl glycol and was primarily developed for sanitary and
quality marine applications.
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Preparation of neopentyl glycol polyesters by reacting neopentyl glycol
with carboxylic acids or derivatives thereof in the presence of minor
amounts of glycols which boil at lower temperatures than neopentyl
glycol.
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Neopentyl glycol hydroxypivalate (NGH) is isolated from a mixture
containing NGH, lower and higher boiling products and inorganic salts
and purified in a two-stage process.
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In the
process for production of NGH granules by depositing a neopentyl glcol
hyderoxypivalate melt on a chill surface, on which the melt solidifies
as a flat film which after solidification is comminuted to give
granules.
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