Method for imparting releasability to a substrate surface

Details Method for imparting releasability to a substrate surface Method for imparting releasability to a substrate surface

1986-04-04

1988-02-23

Page, Thurman K.

Coating processes

Electrical product produced

Welding electrode

427387, B05D 306

Patent

active

047269642

ABSTRACT:
The invention provides a method for imparting releasability to the surface of a plastic film or paper by coating the surface with an organopolysiloxane composition followed by curing, in which the curing is complete by heating at a relatively low temperature and the cured surface film of the composition is very stable and free from the problem of transfer to another body in contact therewith. The composition comprises a vinyl-containing organopolysiloxane, an organohydrogenpolysiloxane and a platinum compound to catalyze the addition reaction between the silicon-bonded vinyl groups and silicon-bonded hydrogen atoms. Different from conventional organohydrogenpolysiloxane having a linear molecular structure, the organohydrogenpolysiloxane used in the invention is represented by the general unit formula (RSiO.sub.1.5).sub.m (RHSiO.sub.0.5).sub.n, in which R is a monovalent hydrocarbon group free form unsaturation and m and n are each a positive integer with the proviso that the ratio of n/m is from 0.1 to 3.0, or a combination thereof with a linear organohydrogenpolysiloxane.

REFERENCES:
patent: 4559396 (1985-12-01), Sasaki et al.
patent: 4585705 (1986-04-01), Broderick et al.
patent: 4600484 (1986-07-01), Drahnak
patent: 4603086 (1986-07-01), Fujii

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