Patent ID: 6013754
Filing Date: 2000-01-11
Classification: C08G,C09D

Abstract:
A method for priming a substrate to promote adhesion of a room temperature vulcanizable silicone rubber fouling-release coating to a substrate, before the substrate is exposed to a fouling environment, comprising:applying to the substrate a composition which consists essentially of: a room temperature curable polysiloxane selected from the group consisting of: polyhydro-organosiloxane and polydiorganosiloxane, said polysiloxane having a first repeating unit of the formula: ##STR4## for polyhydro-organosiloxane and ##STR5## for a polydiorganosilane where R.sup.3 is an aliphatic group having 1 to 12 carbon atoms and a terminal unit of the formula: ##STR6## where R.sup.1 is an aliphatic group having from 1 to 12 carbon atoms, where R.sup.2 is such that O--R.sup.2 is selected from the group of radicals consisting of: oximino, benzamido, acetoxy, and alkoxy, the radical having less than 10 carbon atoms, the terminal unit susceptible to hydrolysis under atmospheric conditions so as to form a reactive hydroxyl group,a compound having a condensation reactive group, said compound selected from a group consisting of silanol, silane, organic acid, alcohol and hydroxy terminated siloxane capable of undergoing a condensation reaction with the reactive hydroxyl group at room temperature and the condensation reaction proceeds without the presence of an organometallic catalyst;an additive selected from the group consisting of: aminosilane, chlorinated polyolefin, functionalized silane, pigment, mineral filler, thixotropic agent, stabilizer, surfactant, anti-oxidant agent, plasticizer and desiccant; andallowing said composition to cure on the substrate.