Process for producing a fine pored silicone foam

Details Process for producing a fine pored silicone foam Process for producing a fine pored silicone foam

1993-10-22

1994-10-18

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 72, 521 82, 521154, C08J 902

Patent

active

053569407

ABSTRACT:
A process for producing a high quality silicone foam by free foaming, in which a two-component addition crosslinking system is used, comprised of a component A which contains a silicone polymer having at least two double bonds per molecule, preferably vinyl groups, a complexed organo-platinum for example with butanol, fumed silica, and water, as well as further additives, if appropriate, and a component B which contains a silicone polymer having at least two double bonds per molecule, preferably vinyl groups, fumed silica, and polydimethyl hydrogen siloxane as SiH crosslinking agent. The two components A and B are mixed, and the reaction mixture is subsequently pressurized, preferably using compressed air or nitrogen, in a storage vessel over several hours so that the gas is present in the mixture in a dissolved form. Subsequently, the reaction mixture is heated and made to react, preferably by applying it over an area and with a desired thickness, which results in the formation of a fine pored homogenous silicone foam.

REFERENCES:
patent: 4888217 (1989-12-01), Jones

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