Process for the preparation of crystalline poly(cyclohexanedimethylene terephthalate)
US5106941A · kind A · utility
5Cited by
3References
4Claims
0Family size
Inventors
Key dates
| Filing date | Jun 24, 1991 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Jun 24, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a crystalline poly(cyclohexanedimethylene terephthalate) comprising PA1 (A) preparing an admixture of molten poly(cyclohexanedimethylene terephthalate) and a 4A zeolite, and PA1 (b) cooling the admixture at a rate less than about 1000.degree. C. per minute to a temperature less than about 80.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.