Methods of post-polymerization injection in condensation polymer production
US6573359B2 · kind B2 · utility
36Cited by
35References
88Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is a novel method for the late introduction of additives into a process for making condensation polymers. The method employs a reactive carrier that functions as a delivery vehicle for one or more additives. The reactive carrier reacts with the condensation polymers, thereby binding the reactive carrier in the polymer resin and preventing the emergence of the reactive carrier from the polymer resin during subsequent thermal processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.