Polyester process and product
US4100142A · kind A · utility
65Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Oct 20, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/78
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A continuous process for producing high molecular weight polyester of fiber-forming quality is described. The process includes the direct esterification of a dicarboxylic acid with a glycol to yield a prepolymer mixture of ester and low molecular weight polyester condensable under conditions of elevated temperature and vacuum into polymer of high intrinsic viscosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.