Patent ID: 7641967
Filing Date: 2010-01-05
Classification: C09J,H01L,Y10T

Abstract:
1. A heat resistant masking tape, comprising: (1) a heat resistant backing film layer; and (2) a pressure-sensitive adhesive layer disposed on the heat resistant backing film layer, wherein the pressure-sensitive adhesive layer comprises a partially or fully cross-linked polymer resulting from: (a) polymerizing a polymerizable solution to yield a polymer dissolved in an organic solvent, said polymerizable solution consisting essentially of a polymerization initiator and a monomer mixture consisting of three distinct monomers in said organic solvent, the monomer mixture consisting of an alkyl (meth)acrylate monomer with an alkyl group having 4 to 15 carbon atoms, a glycidyl(meth)acrylate monomer and a (meth)acrylic acid monomer, the glycidyl(meth)acrylate monomer being present in an amount of 2 to 13% by weight of the total weight of monomers, the (meth)acrylic acid monomer being present in an amount of 1 to 7% by weight of the total weight of monomers, and the alkyl (meth)acrylate monomer accounting for a balance of the total weight of monomers; (b) removing said solvent by drying; and (c) at least partially cross-linking said polymer by drying and optionally with additional heating, causing a reaction between a glycidyl group and carboxylic group in said polymer.