Method of producing elastomeric silicone foam

Details Method of producing elastomeric silicone foam Method of producing elastomeric silicone foam

C - Chemistry, Metallurgy

08

L

403/51

C08L 83/07 (2006.01) C08J 9/02 (2006.01) C08K 5/05 (2006.01) C08L 83/06 (2006.01)

Patent

CA 1270095

METHOD OF PRODUCING ELASTOMERIC SILICONE FOAM Abstract A method of producing elastomeric silicone foams from a two-part system is disclosed. The method mixes the ingredients then allows a froth to form and cure at ambient temperature to an elastomeric silicone foam. The method mixes a vinyl-containing polydiorganosiloxane (1), a hydroxylated polydiorganosiloxane (2), a platinum catalyst (3), an organohydrogensiloxane (4) and a profoamer (5). The profoamer is a resinous, benzene-soluble organosiloxane copolymer consisting essentially of SiO4/2 units, silicone- bonded hydroxyl groups, (CH3)3SiO1/2 units, and fluorine- containing units. An embodiment of the method includes a liquified blowing agent and stores the mixture under superatmospheric pressure, forming a foam by releasing the mixture to atmospheric pressure. Another embodiment includes an alcohol in the mixture to provide a foam of lower density. When lauryl alcohol is used and the alcohol is mixed with (1), (3), and (5) before (2) is admixed, the foam has a Bashore resiliency of less than 20.

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