Abstract A self cross-linking pressure-sensitive acrylate adhesive and tape based on an adhesive copolymer of monomers comprising a major amount of a medium chain length alkyl acrylate monomer and preferably a minor amount of a cohesion inducing short chain monomer, plus a very small amount of an alkoxy silyl polymerizable cross-linking monomer and a relatively small amount, i.e., about 2-6 parts by weight of the total monomer solids, of a catalytic acid monomer selected from the group consisting of acrylic acid, methacrylic acid, and itaconic acid. The catalytic acid monomer acts as a built-in or internal catalyst which causes the adhesive copolymer to be self crosslinking. A stabilization system for this self cross-linking system also is disclosed.
A pressure-sensitive adhesive sheet according to claim 1 wherein said monomers also include about 10- 30 parts per 100 parts by weight of the total monomer solids of a cohesion inducing short chain monomer copolymerizable with monomer (a).
Claim 2
Dependent Claim
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A pressure-sensitive adhesive sheet according to claim 2 wherein said cohesion inducing short chain monomer is selected from the group consisting of vinyl acetate, methyl acrylate, and methyl methacrylate.
Claim 3
Dependent Claim
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A pressure-sensitive adhesive sheet according to claim 2, wherein said catalytic acid monomer is acrylic acid and said copolymer comprises about 2.5- 4.5 parts per 100 parts by weight of the total monomer solids thereof.
Claim 4
Dependent Claim
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A pressure-sensitive adhesive sheet according to claim 4, wherein said medium chain length acrylate monomer is 2-ethyl hexyl acrylate. 6 A pressure-sensitive adhesive sheet according to claim 1, wherein said cross-linking monomer comprises alkoxy silyl alkyl groups according to the following general formula:
Claim 5
Dependent Claim
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A pressure-sensitive adhesive sheet according to claim 7, wherein said cross-linking monomer is