Pressure-sensitive adhesive tape
First Claim
1. A flexible pressure-sensitive adhesive tape that can bear a shearing force, comprising:
- a sheet backing comprising polybutadiene foam having a substantially closed cell foam structure and having a density within the range of 0.05 to 0.50 g/cm3 ; and
a pressure-sensitive adhesive composition on a surface of the sheet backing, the pressure-sensitive adhesive composition comprising;
(A) an acrylic copolymer prepared from a mixture comprising;
(i) at least one acrylic ester having an alkyl radical containing, on average, 4 to 12 carbon atoms as an alcohol residue; and
(ii) polymerizable unsaturated carboxylic acid, wherein the content of the polymerizable unsaturated carboxylic acid is within the range of 5 to 15 parts by weight relative to 55 to 95 parts of the acrylic ester;
(B) a polymer having a hydrolyzable silicon-containing radical; and
(C) a polyfunctional isocyanate compound,wherein said adhesive composition is free of a silanol condensation catalyst that is used for the condensation of said hydrolyzable silicon-containing radical.
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Accused Products
Abstract
Disclosed is a pressure-sensitive adhesive tape comprising: a sheet backing composed of polybutadiene foam having a substantially closed cell foam structure; and a layer of pressure-sensitive adhesive composition provided on a surface of the sheet backing. The pressure-sensitive adhesive composition in the present invention comprises: (A) an acrylic copolymer prepared from a mixuture composing: (i) at least one acrylic ester monomer having an alkyl radical containing, on average, 4 to 12 carbon atoms as an alcohol residue; and (ii) polymerizable unsaturated carboxylic acid monomer; (B) a polymer having a hydrolyzable silicon-containing radical; and (C) a polyfunctional isocyanate compound. The adhesive composition of the present invention needs no silanol condensation catalyst.
35 Citations
15 Claims
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1. A flexible pressure-sensitive adhesive tape that can bear a shearing force, comprising:
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a sheet backing comprising polybutadiene foam having a substantially closed cell foam structure and having a density within the range of 0.05 to 0.50 g/cm3 ; and a pressure-sensitive adhesive composition on a surface of the sheet backing, the pressure-sensitive adhesive composition comprising; (A) an acrylic copolymer prepared from a mixture comprising; (i) at least one acrylic ester having an alkyl radical containing, on average, 4 to 12 carbon atoms as an alcohol residue; and (ii) polymerizable unsaturated carboxylic acid, wherein the content of the polymerizable unsaturated carboxylic acid is within the range of 5 to 15 parts by weight relative to 55 to 95 parts of the acrylic ester; (B) a polymer having a hydrolyzable silicon-containing radical; and (C) a polyfunctional isocyanate compound, wherein said adhesive composition is free of a silanol condensation catalyst that is used for the condensation of said hydrolyzable silicon-containing radical. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A pressure-sensitive adhesive tape comprising:
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a sheet backing comprising a polybutadiene foam material; and a pressure-sensitive adhesive composition on a surface of the sheet backing, the pressure-sensitive adhesive composition comprising; (A) an acrylic copolymer prepared from a mixture comprising; (i) at least one acrylic ester having an alkyl radical containing, on average, 4 to 12 carbon atoms as an alcohol residue; and (ii) polymerizable unsaturated carboxylic acid, wherein the content of the polymerizable unsaturated carboxylic acid is within a range of 5 to 15 parts by weight relative to 55 to 95 parts of the acrylic ester; (B) a polymer having a hydrolyzable silicon-containing radical; and (C) a polyfunctional isocyanate compound, wherein said adhesive composition is free of a silanol condensation catalyst that is used for the condensation of said hydrolyzable silicon-containing radical.
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Specification