Self-adhering silicone compositions and preparations thereof

Details Self-adhering silicone compositions and preparations thereof Self-adhering silicone compositions and preparations thereof

1977-05-23

1978-05-02

Jacobs, Lewis T.

Stock material or miscellaneous articles

Composite

Of quartz or glass

252 1, 260 37SB, 260 465UA, 260 465G, 428447, C08G 7704, B32B 1706

Patent

active

040875857

ABSTRACT:
Mixing vinyl-containing polyorganosiloxane, a silicon-bonded hydrogen containing organosilicon compound, a platinum catalyst, a polysiloxane having at least one silicon-bonded vinyl radical and at least one silicon-bonded hydroxyl radical and an epoxy-containing, alkoxy silane provides a composition which exhibits improved adhesion to many substrates without the aid of a primer when heat cured in contact with the substrate. An example of the polysiloxane is a hydroxyl endblocked polymethylvinylsiloxane and an example of the epoxy silane is ##STR1## The compositions not only have self-adhering properties but also exhibit an extended pot life. The compositions can be prepared by mixing the polysiloxane and epoxy silane at room temperature and thereafter adding the mixture to the other ingredients. The remaining ingredients can be in the form of a two package product in which the polysiloxane-epoxy mixture is added to one package before the packages are mixed to form a curable product.

REFERENCES:
patent: 4033924 (1977-07-01), Mine et al.

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