Method of making siloxane-based polymides
USRE38116E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Nov 8, 2021 |
Classification
- Technology area (CPC —)General
Abstract
A method of making siloxane-based polyamides which includes at least one repeating unit represented by the formula wherein X is a linear or branched C1-C30 alkylene chain; Y is a linear or branched C1-C20 alkylene chain; DP is an integer having a value of 10-500; n is an integer having a value 1-500. The method involves heating an intimate reaction mixture containing an olefinic acid and an organic diamine at a temperature greater than 100° C. and forming an organic diamide; and thereafter reacting the organic diamide with a hydride-terminated polydimethylsiloxane in the presence of a hydrosilylation catalyst to form the siloxane-based polyamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.