Method for the preparation of copolyester elastomer having high viscosity
US5407981A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Jul 23, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/138
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparation of a polyether-ester elastomer. The method comprises admixturing dibasic acid with short chain diol for the formation of a short chain ester monomer represented :into general formula (I) and with polyglycol for the formation of a long chain ether moromet represented into general formula (II), adding the alkali salt of dialkylsufoisophthalate to the admixture to react the admixture until the discharge of methanol is tip to above 70%, adding stabilizing agent to perform the polymerization reaction, and then, blending phenolic alkali metal salt. ##STR1## wherein R is a biradical obtained by removing carboxyl group from a dicarboxylic acid having a molecular weight not more than 400, PA1 D is a biradical obtained by removing hydroxyl group from a short chain diol having a molecular weight not more than 250, and PA1 G is a biradical obtained by removing hydroxyl group from a long chain ether glycol having a molecular weight of a range of about 400 to 4,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.