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Hydroxypivalic acid

Self-condensation of hydroxypivalic acid (also known as 3-hydroxy-a,a-dimethylpropionic acid and as 2-hydroxy-1,1-dimethylpropionic acid) only yields low molecular weight polymers and it is more convenient to prepare the polymer from pivalolactone (also known as a,a-dimethyl-[3-propiolactone) using tributylphosphine as an initiator Figure 25.28). [Pg.739]

Manufacture. Hydroxypivalyl hydroxypivalate may be produced by the esterification of hydroxypivalic acid with neopentyl glycol or by the intermolecular oxidation—reduction (Tishchenko reaction) of hydroxypivaldehyde using an aluminum alkoxide catalyst (100,101). [Pg.375]

The first six systems listed in Table 1.8 show that the Tmax.(exotherm)-value of the epoxy/alifatic acid systems is related with the strength (pKa-value) of the acid used. The inductive action of the hydroxyl-group in hydroxypivalic acid, for example, causes a pKa-value decrease from 5.03 (pivalic acid) to 4.50 (hydroxypivalic acid). This difference results in a Tmax.(exotherm)-value decrease of 24°C. Subsequently, a still stronger acid, di-ethylmallonic acid (DEMA), was tried. [Pg.47]

Propanoic acid, 3-hydroxy-,2,2-dimethyl- hydroxypivalic acid H0H2C-C(CH3)2-C00H 2917a ... [Pg.191]

Steinbiichel and co-workers also revealed the synthesis of methylated scl-PHAs when C. necator, B. cepacia and Rhodococcus ruber were cultured in a mineral salt medium containing tighc acid (C. necator, B. cepacia) or () )-3-hydroxypivalic acid R. ruber), respectively (Fiichtenbusch et al. 1996, 1998). [Pg.148]

Ftichtenbusch B, Fabritius D, Steinbiichel A (1996) Incorporation of 2-methyI-3-hydroxybutyric acid by axenic cultures in defined media. FEMS Microbiol Lett 138 153-160 Ftichtenbusch B, Fabritius D, Waltermann M, Steinbiichel A (1998) Biosynthesis of novel copolyesters containing 3-hydroxypivalic acid by Rhodococcus ruber NCIMB 40126 and related bacteria. FEMS Microbiol Lett 159 85-92... [Pg.173]

Hydroxypivalyl hydroxypivalate or 3-hydroxy-2,2-dimethylpropyl 3-hydroxy-2,2-dimethylpropionate (9) is a white crystalline solid at room temperature. It is used to manufacture polyester resias for use ia surface coatiags where good resistance to weatheting and acid rain are of particular importance (6). [Pg.374]

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,... [Pg.331]


See other pages where Hydroxypivalic acid is mentioned: [Pg.16]    [Pg.59]    [Pg.173]    [Pg.99]    [Pg.198]    [Pg.362]    [Pg.365]    [Pg.932]    [Pg.103]    [Pg.58]    [Pg.175]    [Pg.261]    [Pg.646]    [Pg.16]    [Pg.59]    [Pg.173]    [Pg.99]    [Pg.198]    [Pg.362]    [Pg.365]    [Pg.932]    [Pg.103]    [Pg.58]    [Pg.175]    [Pg.261]    [Pg.646]    [Pg.375]    [Pg.375]   
See also in sourсe #XX -- [ Pg.103 ]




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