Silicone release coated polyester film and a process for coating the film
AssigneeHoechst Celanese Corporation
InventorsKenneth J. Muschelweicz, Robert G. Posey
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Abstract
A silicone release polyester film coated with an aqueous silicone coating composition on one surface. The aqueous silicone release coating composition is made up of an alkylvinylpolysiloxane containing vinyl groups, a tin or platinum catalyst, a glycidoxysilane and an alkylhydrogenpolysiloxane. A process for coating a polyester film with the aqueous silicone coating composition is also disclosed, where the coating occurs in-line, disclosing the manufacturing process for the film before it is heat-set. The silicone release coated polyester film has an acceptable release value when subjected to solvents or heat.
Claims22
A polyester release film comprising an oriented polyester film and an effective amount of a silicone release coating composition on said film to release an adhesive backed article from the silicone coating, said silicone release coating comprising
- a) an alkylvinylpolysiloxane containing vinyl groups;
- b) a catalyst selected from the group consisting of platinum complex and tin complex;
- c) a glycidoxysilane;
- and
- d) an alkylhydrogenpolysiloxane containing 1.5 to 2 mol % hydrogen.
A silicone release coating composition comprising:
- a) an alkylvinylpolysiloxane containing vinyl groups;
- b) a catalyst selected from the group consisting of platinum complex and tin complex;
- c) a glycidoxysilane;
- and
- d) an alkylhydrogenpolysiloxane containing 1.5 to 2 mol % hydrogen.
Dependencies are inferred from the claim text.