Polyester, process for producing the same and molding product therefrom
US5852164A · kind A · utility
29Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Apr 15, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/199
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyester comprises a dicarboxylic acid moiety comprising terephthalic acid or its ester forming derivative and a diol moiety comprising ethylene glycol and 1,4-cyclohexanedimethanol of 10 to 60 mol % based on the whole diol moiety, the intrinsic viscosity of the polyester being 0.68 to 0.95 dl/g, the "b" value of color tone of the produced pellets of polyester being -5 to 5, the number of the carboxylic acid terminals being not more than 30 eq/ton, and the sum of the numbers of the vinyl terminals, the vinylidene terminals and the methylcyclohexene terminals being not more than 25 eq/ton.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.