Latently-curable organosilicone release coating composition

Claim 1

A process comprising the steps: (a) providing a latently-curable organosilicone composition by mixing at ambient temperatures (1) an ethylenically-unsaturated polysiloxane, (2) a polyhydrosiloxane, (3) an effective amount of a metal-containing hydrosilation catalyst to facilitate the addition cure reaction of components (1) and (2), and (4) an amount of a hydrosilation inhibitor 1,4-dicarboxylic acid compound sufficient to inhibit premature gelation of the mixture of components (1), (2), and (3) at low, ambient or room temperature but insufficient in amount to prevent hydrosilation of the mixture at an elevated temperature, said hydrosilation inhibitor having the structural formula ##STR10## wherein R 2 is ethynylene or cis-ethenylene; R 3 is a saturated or unsaturated organic group having 1 to 12 carbon atoms which is unsubstituted or substituted by 1 to 23 halogen atoms, and has up to 25 hydrogen atoms; and X is --O-- or ##STR11## in which R 4 is the same as defined for R 3 , and R 3 and R 4 together with the N can form a saturated azacyclic ring, (b) coating a substrate with said admixture, and (c) elevating the temperature of the resulting coated admixture when cure of said admixture is to be effected.