Release coating for silicone pressure sensitive adhesives
AssigneeAmerican Tape Co.
InventorJohn K. Tynan, Jr.
Life of this patent
Estimating the term…
Abstract
A laminate comprising a substrate, a continuous layer of a release coating on one surface thereof, and a layer of a silicone pressure sensitive adhesive on the surface of said release coating, said release coating being a mixture of a resin having perfluoro side chains and a film forming resin which binds said resin having said perfluoro side chains to said substrate, wherein said film forming resin is selected from the group consisting of polyester, polyamides, functionalized polyolefins, and nitrile polymers and copolymers.
Claims15
A laminate comprising a substrate, a continuous layer of a release coating on one surface thereof, and a layer of a silicone pressure sensitive adhesive on the surface of said release coating, said release coating being a mixture of a resin having perfluoro side chains and a film forming resin which binds said resin having said perfluoro side chains to said substrate, wherein said film forming resin is the reaction product of an alkyd resin and an aminoplast resin, said mixture comprising said resin having perfluoro side chains being present in an amount of about 2 to 10% dry weight, said alkyd resin being present in an amount of about 40 to 90% dry weight, and said aminoplast resin being present in an amount of about 10 to 50% dry weight.
A backing for a pressure sensitive tape or a release liner comprising a substrate having a continuous coating on the surface thereof comprising a cured composition of a film forming resin and a resin having perfluoro side chains, the film forming resin being the reaction product of an alkyd resin and an aminoplast resin, said composition comprising said resin having perfluoro side chains being present in an amount of about 2 to 10% dry weight, said alkyd resin being present in an amount of about 40 to 90% dry weight, and said aminoplast resin being present in an amount of about 10 to 50% dry weight.
A pressure sensitive adhesive tape comprising a flexible substrate having a first surface and a second surface, said first surface having a continuous layer of a release coating thereon and said second surface having a layer of a silicone pressure-sensitive adhesive thereon, said release coating being a cured composition of a film forming resin and a resin having perfluoro side chains, wherein said film forming resin is the reaction product of an alkyd resin and an aminoplast resin said composition comprising said resin having perfluoro side chains being present in the mixture in an amount of about 2 to 10% dry weight, said alkyd resin being present in an amount of about 40 to 90% dry weight, and said aminoplast resin being present in an amount of about 10 to 50% dry weight.
Dependencies are inferred from the claim text.