Neopentyl glycol esters

Dimethyl-, 3-hydroxy-2,2-dimethylpropyl hydraoryl-ate EINECS 214-222-2 Esterdiol 204 HSDB 5783 Hydracrylic acid, 2,2-dimethyl-, 3-hydroxy-2,2-dimethyl-propyl ester Hydroxyneopentyl hydroxypivalate Hydroxypivaiic acid neopentyl glycol ester Hydroxypivalyl hydroxypivalate Neopentyl glycol monohydroxypivalate,... 

Fatty acids, tall oil, esters with neopentyl glycol. See Neopentyl glycol tallate Fatty acids, tall oil, esters with pentaerythritol. See Pentaerythrityl tallate Fatty acids, tall oil, neopentyl glycol ester. See Neopentyl glycol tallate Fatty acids, tall oil, potassium salts. See Potassium tallate... 

Polyols. Several important polyhydric alcohols or polyols are made from formaldehyde. The principal ones include pentaerythritol, made from acetaldehyde and formaldehyde trimethylolpropane, made from -butyraldehyde and formaldehyde and neopentyl glycol, made from isobutyraldehyde and formaldehyde. These polyols find use in the alkyd resin (qv) and synthetic lubricants markets. Pentaerythritol [115-77-5] is also used to produce rosin/tall oil esters and explosives (pentaerythritol tetranitrate). Trimethylolpropane [77-99-6] is also used in urethane coatings, polyurethane foams, and multiftmctional monomers. Neopentyl glycol [126-30-7] finds use in plastics produced from unsaturated polyester resins and in coatings based on saturated polyesters. 

Esters. Neopentyl glycol diesters are usually Hquids or low melting soflds. Polyesters of neopentyl glycol, and in particular unsaturated polyesters, are prepared by reaction with polybasic acids at atmospheric pressure. High molecular weight linear polyesters (qv) are prepared by the reaction of neopentyl glycol and the ester (usually the methyl ester) of a dibasic acid through transesterification (37—38). The reaction is usually performed at elevated temperatures, in vacuo, in the presence of a metallic catalyst. 

Polyol ester turbine oils currendy achieve greater than 10,000 hours of no-drain service in commercial jet aircraft with sump temperatures ranging to over 185°C. Polyol esters are made by reacting a polyhydric alcohol such as neopentyl glycol, trimethylol propane, or pentaerythritol with a monobasic acid. The prominent esters for automotive appfications are diesters of adipic and a2elaic acids, and polyol esters of trimethylolpropane and pentaerythritol (34). 

Cy—oxo-derived acids are the principal derivatives of the C —oxo aldehydes, and ia analogy to oxo aldehyde market appHcations, are used chiedy to make neopolyol esters, ie, those based on neopentyl glycol, trimethylolpropane, or pentaerythritol. These synlubes are employed almost entirely ia aeromotive appHcations. Heptanoic acid is also employed to make tetraethylene glycol diheptanoate, a plasticizer used with poly(vinyl butyral). 

The flexibiHty of the final film is partiy controUed by the ratio of aromatic to aHphatic dibasic acids. The esters of highly substituted polyols such as neopentyl glycol (NPG) (2,2-dimethyl-l,3-propanediol) [126-30-7] 1,4-dimethylolcyclohexane (cyclohexanedimethanol (CHDM)) [27193-23-3] ... 

The direct isolation of the well defined and stable neopentyl glycol arylboronic esters, without the need for an intermediate aqueous work-up. 

The conversion of arylboronic acids to the corresponding neopentyl glycol arylboronic esters has several advantages The esters are readily soluble in organic solvents, shelf stable, non-hygroscopic and easily characterized as a single entity.9 Furthermore, boronic esters can be utilized in many of the transformations where arylboronic acids usually are employed, making them an attractive alternative from a practical point of view. 

Synthesis of oligomers. The oligomers were esters of tere- or isophthalic acid (T or I) with the dlols glycol (G), 1,4-butane-dlol (B) or neopentyl glycol (N). Using these symbols the materials can be indicated simply as, for Instance GTG (first oligomer of ethylene terephthalate) or (BI)3B (third oligomer of butylene isophthalate). 

By this approach, esters such as di(2-ethylhexyl) adipate and an oligomeric ester of neopentyl glycol have been synthesized recently by alcoholysis of dimethyl adipate ester and the corresponding alcohols, with alkaline earth metal compounds as the catalysts (171) (Scheme 30). These types of esters find application as lubricants, and it is suggested that they can be used as environment-friendly substitutes for petroleum-derived lubricants. The reactions were carried out with isooctane as a... 

Thermoset polymeric esters consisting of neopentyl glycol, propylene glycol, trimethylol propane, adipic acid, maleic anhydride, and 2-ethyl hexanol were prepared by McAlvin et al. (3) and were used in blends containing styrene monomer. The mixture was cured by pultrusion and had improved weatherabil-ity characteristics. 

Cimbura and Kofoed (50),mentioned earlier, used GLC to separate amphetamine and methamphetamine after acetylation with acetic anhydride in methanol. Derivatives were extracted using diethyl ether and chromatographed op columns of either 3% OV-17, OV-1, or SE-30. Column temperature was 160°C. They also reported the chromatographic determination of acetylated morphine on 3% SE-30, OV-1, or OV-17 at temperatures of 220°C. Cruickshank et al.(21) separated 21 amino acids as their trifluoroacetylated methyl esters. The column was 5% neopentyl glycol succinate on Gas Chrom P. Column temperatures were both isothermal and programmed 65°C for 20 min at 1.5°C/min then 2°C/min until 42.5 min then 4°C/min until 60 min then isothermal until about 75 min (see Figure 12.2). Chang et al. (19), used BSA/pyridine to form the TMS derivatives of levodopa, methyldopa, tyrosine. 

Gas chromatography indicates a 92% yield of product. Using a 10 ft. by 0.25 in. column packed with 20% NPGSE (Neopentyl Glycol Sebacate Ester) suspended on Chromosorb W heated to 235° and a helium flow rate of 60 ml. per minute,... 

Esters Apiezon L benzyldiphenyl carbowax 20M cyclodextrin acetate diethylene glycol adipate di-(2-ethylhexyl) sebacate diisodecyl phthalate dimer acid/OV-1 (50/50, v/v) Hallcomid M18 neopentyl glycol succinate propylene glycol SE-30 SE-52 XE-60 Friton X-100 Tween-80... 

Jiao [40] has reported results of Poly (neopentyl glycol diacid ester)s (PNEs) which present an intermediate structures between those of PIB and PCL. Scheme 4.1 shows the structures of PIB, PCL, and PNE. 

Polyesters. A large number of polyester phases have been used, particularly for the separation of fatty acid esters. These phases include neopentyl glycol... 

Use Intermediate for rubber antioxidants and accelerators, for neopentyl glycol synthesis of amino acids, cellulose esters, flavors, etc. 

Polyol esters are made by reacting a polyhydric alcohol, such as neopentyl glycol (NPG), trimethylol propane (TMP) or pentaerythritol (PE), with a monobasic acid to give the desired ester. When making neopolyol esters, excess acid is used because the acid is more volatile than the neopolyol glycol and therefore easier to recover from the ester product. 

Polyol or hindered esters prevent 3-hydrogen abstraction by eliminating the P-hydrogen. These are manufactured by reacting polyhydric alcohols such as neopentyl glycol, trimethylolpropane and pentaerythritol with mono-acids ranging from pentanoic, nCs, to decanoic, Cio [10] ... 

---