Polymer compositions having improved molding characteristics
US5091464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Dec 19, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are novel blends of fully aromatic copolyesters which comprise (a) 1-19 parts by weight of a polyester comprising recurring moieties of dihydroxybenzene, nonvicinal benzene dicarboxylate, para oxybenzoate to (b) 1 part by weight of a polyester comprising recurring moieties of diphenol, nonvicinal benzene dicarboxylate, para oxybenzoate; wherein the polyester (a) has a melting point in the range of about 340 C. to 400 C., a crystallization temperature of from about 300-340 C., and a crystallization rate of at least 1,000 counter per minute. The blends display improved surface properties, particularly improved blistering resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.