Synthesis of oligomeric poly(silarylene-siloxane-acetylene)'s and their conversion to high temperature plastics, elastomers, and coatings
US6787615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/52
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention comprises a networked polymer comprising the formula: wherein n≧1; wherein n is an average value obtained by averaging all repeating units of the networked polymer; wherein m≧1; wherein Y is a divalent group containing one or more acetylenic groups, one or more crosslinks, or both;wherein z is the average number of crosslinks per Y group; wherein Ar1 and Ar2 are independently selected aromatic groups; and wherein each R is independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and combinations thereof. The invention also includes prepolymers and precursors needed to make the networked polymer and processes for making all of the above. The invention also includes a ceramic composition made by pyrolysis of the networked polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.