Electrosprayable release coating

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 5/46 (2006.01) B05D 5/08 (2006.01) C08F 290/14 (2006.01) C09D 183/10 (2006.01)

Patent

CA 2248312

Free-radically polymerizable release coating compositions containing conductivity enhancers, which are capable of being electrosprayed onto a substrate. The compositions comprise (a) about 100 parts by weight of one or more free-radically polymerizable vinyl monomer(s), (b) from about 0.05 to about 250 parts by weight of one or more polydiorganosiloxane polymer(s) copolymerizable with the vinyl monomer(s), and (c) from about 0.10 to about 10 parts by weight, based on 100 parts by weight of (a) and (b), of one or more non-volatile conductivity enhancer(s), which are soluble in the monomer(s) and which do not interfere with polymerization, wherein the composition may be electrosprayed. The composition may further comprise from about 0.1 to about 5 parts by weight of one or more initiator(s) based on 100 parts by weight of monomer(s) and polydiorganosiloxane polymer(s). Another embodiment of the present invention further comprises at leas 0.1 part by weight, based on 100 parts by weight of monomer(s) and polydiorganosiloxane polymer(s), of one or more dissociation enhancing agent(s) soluble in the monomer(s).

La présente invention concerne des compositions de revêtement polymérisables par libération de radicaux libres contenant des agents favorisant la conductivité, qui peuvent être appliquées par électrodiffusion sur un substrat. Lesdites compositions comprennent (a) environ 100 parties en poids d'un ou plusieurs monomères vinyliques polymérisables par libération de radicaux libres, (b) de 0,05 parties environ à environ 250 parties en poids d'un ou plusieurs polymères polydiorganosiloxane copolymérisables avec le ou les monomères vinyliques et (c) de 0,10 environ à environ 10 parties en poids sur la base des 100 parties en poids desdits (a) et (b), d'un ou plusieurs agents favorisant la conductivité non volatils qui sont solubles dans lesdits monomères et qui ne doivent pas interférer dans le processus de polymérisation, ce qui permet d'électrodiffuser ladite composition. La composition peut en outre comporter d'environ 0,1 à environ 5 parties en poids d'un ou plusieurs initiateurs sur la base des 100 parties en poids desdits monomères et desdits polymères polydiorganosiloxane. Un autre mode de réalisation de la présente invention comporte en outre au moins 0,1 partie en poids, sur la base des 100 parties en poids desdits monomères et desdits polymères polydiorganosiloxane, d'un ou plusieurs agents favorisant la dissociation, solubles dans lesdits monomères.

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