Low consistency, one-part silicone elastomers

Details Low consistency, one-part silicone elastomers Low consistency, one-part silicone elastomers

C - Chemistry, Metallurgy

08

L

400/5315

C08L 83/04 (2006.01) C08K 5/00 (2006.01) C08K 5/5425 (2006.01) C08K 5/544 (2006.01) C08K 5/5455 (2006.01) C08K 5/549 (2006.01) C08K 9/10 (2006.01) C08K 13/00 (2006.01) C08K 13/02 (2006.01)

Patent

CA 1288884

LOW CONSISTENCY, ONE-PART SILICONE ELASTOMERS Abstract A one-part silicone elastomeric composition that is flowable or easily extruded is prepared by mixing a hydroxyl endblocked polydiorganosiloxane, a difunctional silane having two amido radicals, and an organic peroxide suitable for vulcanizing silicone rubber. A nonacidic filler is optional. After being put in place, the composition is exposed to moisture to activate a chain extension reaction that increases the molecular weight of the polydiorganosiloxane, to improve the physical properties of the cured silicone elastomer. After chain extension has taken place, the composition is heated to activate the organic peroxide, thereby crosslinking the composition into a silicone elastomer. The composition is useful as a potting and encapsulating material.

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