Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1994-10-11
1995-11-21
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 35, 528 37, 524477, C08G 7706
Patent
active
054688299
ABSTRACT:
A method for preparing in situ reinforced silicone elastomers and the compositions prepared by the method. The method comprises forming a mixture comprising an end-functional diorganopolysiloxane; a stoichiometric excess of a hydrolyzable siloxane having hydrolyzable functionality described by formula--R.sup.2 SiQ.sub.3-b R.sub.b, were each R is independently selected from a group consisting of alkyls comprising one to six carbon atoms, alkenyls comprising two to six carbon atoms, and aryls, R.sup.2 is a divalent hydrocarbon radical comprising one to 12 carbon atoms, each Q is independently selected from a group consisting of hydroxy, acyloxys comprising one to six carbon atoms, alkoxys comprising one to six carbon atoms, and substituted alkoxys comprising one to six carbon atoms, and b=0 to 2; and a tin salt catalyst and contacting the mixture with water to effect curing. The resulting silicone elastomers are in situ reinforced to provide high strength.
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Bergstrom Debora F.
Burns Gary T.
Giwa-Agbomeirele Patricia A.
Boley William F.
Dow Corning Corporation
Glass Margaret W.
Marquis Melvyn I.
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