Process for the preparation of crystalline copolyesters
US5187216A · kind A · utility
15Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Apr 18, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of crystalline copolyesters from substantially amorphous, diethylene glycol-containing copolyesters wherein the a zeolite is incorporated in the substantially amorphous copolyester to promote crystallization upon heating a particulate form of the resulting copolyester at crystallizing effective temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.