Title: Method for imparing releasability to a substrate surface
Application Number: 86102386 Application Date: 1986.04.09
Publication Number: 1005285 Publication Date: 1986.11.26
Approval Pub. Date: 1991.01.02 Granted Pub. Date: 1991.01.02
International Classifi-cation: C08G77/06;C08G77/20;C09D183/04;C09J7/02
Applicant(s) Name: Sinyutsukagaku Chemical Industry Co. Ltd. Address:
Inventor(s) Name: Kenichi Isobe;Yasnaki Hara
Attorney & Agent: REN ZONGHUA LIN BAINAN
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 (RSiO1.5)m(RHSiO0.5)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.
Time: 4
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