Room temperature vulcanizable silicone compositions

Details Room temperature vulcanizable silicone compositions Room temperature vulcanizable silicone compositions

C - Chemistry, Metallurgy

08

G

C08G 77/18 (2006.01) C08K 5/57 (2006.01) C08L 83/04 (2006.01) C08L 83/06 (2006.01) C09D 183/06 (2006.01)

Patent

CA 2056569

Docket No. 60Sl-1394 Abstract of the Disclosure Room temperature vulcanizable silicone compositions are provided having improved shelf life, primerless adhesion, deep section cure, and low toxicity properties, comprising by weight: A. 100 parts of a polydiorganosiloxane having a viscosity of from about 100 to about 1,000,000 centipoise at 25°C., wherein the silicon atoms at each polymer end chain is terminated with at least two alkoxy radicals, the organic group being a C1-15 monovalent hydrocarbon radical; B. an effective amount of a diorganotin bis beta-diketonate condensation catalyst; C. from about 0.1 to about 1.5 parts of a scavenger for hydroxy functional groups, preferably a disilazane or polysilazane; D. from about 0.6 to about 5 parts of an adhesion promoting polyalkoxysilane functionalized with ether, epoxy, isocyanato, cyano, acryloxy, and acyloxy, preferably with apoxy; and E. from 0 to about 10 parts of a crosslinking polyalkoxysilane.

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