Heat-resistant injection-moldable copolyester resins and resin blends of the same
US5189140A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1992 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A heat-resistant moldable copolyester resin is the copolymerization reaction product of a diol monomer component comprised mainly of 1,4-cyclohexanedimethanol, and an acid monomer component which includes first and second carboxylic acid comonomers. The first acid comonomer is a napthalenedicarboxylic acid or an ester-forming derivative thereof, while the second acid comonomer is 4,4'-diphenyldicarboxylic acid or an ester-forming derivative thereof. The first and second comonomers are present in amounts which satisfy the molar fraction ratio: EQU 3/7.ltoreq.A/B.ltoreq.8.5/1.5 wherein A and B are the molar fractions of the first and second acid comonomers, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.