Polymer precursor composition, crosslinked polymers, thermosets and ceramics made with silyl and siloxyl substituted carboranes with unsaturated organic end groups
US5981678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Feb 27, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A precursor composition includes (1) at least one crosslinking compound resented by the formula: ##STR1## wherein: u and x are independently selected positive integers, v and w are independently selected integers greater than or equal to zero, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl and mixtures thereof, A and E are independently selected from the group consisting of O, an aliphatic bridge, an aryl bridge and mixtures thereof; and R.sup.9 and R.sup.10 are unsubstituted or substituted vinyl or ethynyl groups, (2) at least one organosilicon compound containing at least two silicon hydride moieties per molecule, and (3) a hydrosilation catalyst. A cross-linked polymer is formed by reacting the crosslinking compound of formula I with the organosilicon compound via a hydrosilation reaction. A thermoset polymer is formed by thermally curing the crosslinked polymer. A boron-carbon-silicon ceramic formed by pyrolyzing the cross-linked polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.