Reduction of silicone foam density using buffers

Details Reduction of silicone foam density using buffers Reduction of silicone foam density using buffers

C - Chemistry, Metallurgy

08

J

403/51

C08J 9/00 (2006.01) C08J 9/02 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2034337

PATENTS 60SI-1329/0214m Abstract of the Disclosure A method is provided for preparing a silicone foam having reduced density of about 5 to about 6 pounds per cubic foot, comprising the step of agitating a mixture of ingredients comprising (A) a silicone composition, comprising by weight: (1) 100 parts of a vinyl-terminated polydiorganosiloxane (2) about 0.5 to about 5 parts by weight of an aqueous buffer solution having a pH in the range of about 9 to about 10; and (3) about 25 to about 140 parts per million of a platinum catalyst; (B) about 2.5 to about 20 parts of a substantially linear hydride polysiloxane (C) about 0.1 to about 15 parts or a cyclic hydride polysiloxane; and (D) about 0.1 to about 5 parts of a hydroxyl source selected from the group consisting of water, organic alcohol, or a mixture of the foregoing.

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