C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
402/306, 117/31,
C09J 4/00 (2006.01) C08L 33/06 (2006.01) C09J 7/02 (2006.01) C09J 133/08 (2006.01)
Patent
CA 1276377
CURABLE ACRYLIC/FUMARIC PRESSURE-SENSITIVE ADHESIVES Abstract of the Disclosure There is provided a curable pressure-sensitive-adhesive layer comprising an interpolymerized hard-monomer system including one alkyl methacrylate present in an amount up to about 25% by weight, based on the total weight of the monomers, and a soft-monomer system present in an amount of from about 50% to about 95% by weight, and comprising at least one alkyl monoester or diester of an unsaturated dicarboxylic acid containing 4 carbon atoms wherein each alkyl group independently contains from 4 to about 8 carbon atoms, the monoester or diester being present in a total amount of up to about 30% by weight, based on the total weight of the monomers, and at least one alkyl acrylate. Cure occurs by electron-beam radiation or by ultraviolet radiation, the former at a dosage of up to 200 kiloGrav, after application to a substrate. A multifunctional monomer may be used to enhance radiant-energy cure. The invention allows the use of diesters of unsaturated dicarboxylic acids, for example, dibutyl fumarate, in combination with energy curing, to enhance adhesive properties, an ability not shown by the prior art.
541396
Holguin Daniel L.
Sasaki Yukihiko
Van Ham Robert
Avery International Corporation
Fetherstonhaugh & Co.
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