Medical tape preparation
First Claim
1. A medical tape preparation comprising a pressure-sensitive adhesive layer and a release liner laminated in that order on one side of a support, wherein the pressure-sensitive adhesive layer comprises a pressure-sensitive adhesive that is a mixture of two different pressure-sensitive adhesives:
- (A) a pressure-sensitive adhesive polymer A comprising a copolymer whose constituent components comprise 2-acetoacetoxyethyl methacrylate ester and another vinyl monomer, and(B) a pressure-sensitive adhesive polymer B comprising a copolymer different from pressure-sensitive adhesive polymer A, whose constituent components comprise an alkyl (meth)acrylate ester with a C4-10 alkyl group and another vinyl monomer,wherein the proportion of the pressure-sensitive adhesive polymer A and the pressure-sensitive adhesive polymer B is 1;
9-4;
1,and the content of the 2-acetoacetoxyethyl methacrylate ester in pressure-sensitive adhesive polymer A is 10 wt %-45 wt % with respect to the total weight of the copolymer in pressure-sensitive adhesive polymer A.
2 Assignments
0 Petitions
Accused Products
Abstract
A medical tape preparation which comprises a support and, superposed on one side thereof in the following order, a pressure-sensitive adhesive layer and a release liner. The pressure-sensitive adhesive layer can contain a large amount of an oleophilic oily matter. The tape preparation is excellent in adhesion, cohesiveness, and stability even when no crosslinking agent is used. The pressure-sensitive adhesive layer in the medical tape preparation comprises a blend of two tacky polymers, which are a tacky polymer (A) comprising a copolymer obtained from 2-acetoacetoxyethyl methacrylate and other vinyl monomer(s) as constituent ingredients and a tacky polymer (B) comprising a copolymer which is obtained from a C4-10-alkyl(meth)acrylate and other vinyl monomer(s) as constituent ingredients and is different from the tacky polymer (A).
19 Citations
5 Claims
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1. A medical tape preparation comprising a pressure-sensitive adhesive layer and a release liner laminated in that order on one side of a support, wherein the pressure-sensitive adhesive layer comprises a pressure-sensitive adhesive that is a mixture of two different pressure-sensitive adhesives:
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(A) a pressure-sensitive adhesive polymer A comprising a copolymer whose constituent components comprise 2-acetoacetoxyethyl methacrylate ester and another vinyl monomer, and (B) a pressure-sensitive adhesive polymer B comprising a copolymer different from pressure-sensitive adhesive polymer A, whose constituent components comprise an alkyl (meth)acrylate ester with a C4-10 alkyl group and another vinyl monomer, wherein the proportion of the pressure-sensitive adhesive polymer A and the pressure-sensitive adhesive polymer B is 1;
9-4;
1,and the content of the 2-acetoacetoxyethyl methacrylate ester in pressure-sensitive adhesive polymer A is 10 wt %-45 wt % with respect to the total weight of the copolymer in pressure-sensitive adhesive polymer A. - View Dependent Claims (2, 3, 4, 5)
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Specification