Crystalline polyester resins and process for their preparation
US5986040A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/85
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A moldable linear polyester resin consisting essentially of a polyester having the formula: ##STR1## where R is an alkyl from 1 to 6 carbon atoms and n is greater than about 70, said polyester resin being derived from the transesterification reaction of a starting DMCD and a starting CHDM wherein the trans-cis ratio of repeating units derived from DMCD is preferably greater than about 8 to 1, and the trans-cis ratio of repeating units derived from DMCD is preferable greater than about 1 to 1, said polyester resin having crystalline properties with a preferable viscosity greater than 4500 poise and a melting temperature greater than 216 degrees Centigrade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.