Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From boron reactant having at least one boron to hydrogen or...
Patent
1998-02-27
1999-11-09
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From boron reactant having at least one boron to hydrogen or...
528 15, 528 31, 556403, C08G 7756
Patent
active
059816783
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.
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Marciniec, Bodgan, ed., Comprehensive Handbook on Hydrosilylation, Pergamon Press, Oxford, New York, 1992 Chapter 1.
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Houser Eric J.
Keller Teddy M.
Edelberg Barry A.
Marquis Melvyn I.
Milstead Mark W.
The United States of America as represented by the Secretary of
Webb Ralph T.
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