초록 ▼

An electron beam irradiated release film is formed from a melt processible composition including a silicone component crosslinked by the reaction of a hydride-containing silicone and a silicone containing an unsaturated substituent within a polymeric thermoplastic matrix to form a silicone pseudo-in

An electron beam irradiated release film is formed from a melt processible composition including a silicone component crosslinked by the reaction of a hydride-containing silicone and a silicone containing an unsaturated substituent within a polymeric thermoplastic matrix to form a silicone pseudo-interpenetrating polymer network. The crosslinking of the silicone component by reaction of the hydride and unsaturated substituents is inititated during thermoplastic melt-mixing and film forming of the component with the matrix. Coated films are preferably formed by coextrusion of a polymeric thermoplastic film and a crosslinkable mixture of the silicone components and a polymeric thermoplastic. Alternatively, extrusion coating of the mixture onto a preformed film may be used to form the coated films. Preferably, these films have a thickness of from 0.000005 to 0.2 inch. The film is electron beam irradiated with a dose of from about 50 rad to about 50 Mrad.

대표청구항 ▼

An electron beam irradiated release film having a peak release force of from about 6 grams/inch of width to about 115 grams/inch of width using pressure sensitive adhesive tape, comprising: a film formed from a melt processible composition, said composition comprising (i) a silicone component having

An electron beam irradiated release film having a peak release force of from about 6 grams/inch of width to about 115 grams/inch of width using pressure sensitive adhesive tape, comprising: a film formed from a melt processible composition, said composition comprising (i) a silicone component having an alkylene containing silicone portion and a hydride containing portion and (ii) a polymeric thermoplastic component, said silicone component being crosslinked in the presence of said polymeric thermoplastic component by the reaction of the hydride-containing silicone portion and the alkylene containing silicone portion under the influence of heat in the presence of a siloxane platinum complex catalyst to form a silicone pseudointerpenetrating polymer network, said crosslinking of said silicone component being initiated during thermoplastic melt-mixing and film forming of said components, and irradiating said network with an electron beam with a dose of from about 50 rad to about 50 Mrad to form the release film, said film having a thickness of from 0.000005 to 0.2 inch.