Process for the preparation of glycidylesters of branched carboxylic acids
US6570028B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2000 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D303/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the manufacture of diglycidylesters of &agr;,&agr;′-branched dicarboxylic acids, comprising(a) the reaction of the &agr;,&agr;′-branched dicarboxylic acid with a halo substituted monoepoxide such as an epihalohydrin, in a 1.1-20 acid equivalent ratio relative to the &agr;,&agr;′-branched aliphatic dicarboxylic acid, optionally in the presence of water and water-miscible solvent, and in the presence of a catalyst in an amount of at most 45 mol % of the acid equivalent amount of the &agr;,&agr;′-branched aliphatic dicarboxylic acid, at a temperature in the range of from 30 to 110° C., during a period in the range of from 0.5 to 2.5 hr,(b) addition of alkali metal hydroxide or alkali metal alkanolate up to an acid equivalent ratio as to the &agr;,&agr;′-branched aliphatic dicarboxylic acid in the range of from 0.9:1 to 1.2:1, and reaction at a temperature of from 0 to 80° C.,(c) distillation of the obtained reaction mixture to remove the excess halo substituted monoepoxide and the solvent and water formed, and(d) removal of alkali metal halide salt, preferably by washing the obtained diglycidylester with water mixed with an inert organ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.