Stretchable patch

Details Stretchable patch Stretchable patch

2007-05-29

2007-05-29

Woodward, Michael P. (Department: 1615)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Web, sheet or filament bases; compositions of bandages; or...

C424S400000, C424S443000, C424S447000, C514S772000, C514S772300

Reexamination Certificate

active

09959420

ABSTRACT:
A stretch plaster comprising a support membrane having a thickness of 1 to 50 μm and a drug containing adhesive layer having a thickness of 3 to 400 μm, wherein(i) the support membrane comprising a copolymer of 0 to 90% by weight of vinyl acetate, 10 to 97% by weight of alkyl (meth)acrylate having 3 to 14 of a mean carbon number of alkyl group and 0 to 15% by weight of (meth)acrylic acid,(ii) the copolymer is cross-linked by polyvalent metal such as aluminum or a poly-functional chain compound, wherein the cross-linking ratio is 20% or more of the theoretical total number of carboxyl group of the copolymer when the polymer is cross-linked by the polyvalent metal such as aluminum, and is 1 to 10% expressed by copolymerized ratio of the poly-functional chain compound when the copolymer is cross-linked by poly-functional chain compound,(iii) the support membrane has 150 g or less of self adhesion shown by an adhesion between the support membranes and(iv) the support membrane has 70% or more of an elasticity recovery when it stretches 10% of itself.

REFERENCES:
patent: 5298258 (1994-03-01), Akemi et al.
patent: 5344655 (1994-09-01), Sakai et al.
patent: 5393529 (1995-02-01), Hoffmann et al.
patent: 5753256 (1998-05-01), Cordes et al.
patent: 6045924 (2000-04-01), Bekele
patent: 6071531 (2000-06-01), Jona et al.
patent: 0 900 565 (1999-03-01), None
patent: 0900565 (1999-10-01), None
patent: 10-226638 (1998-08-01), None
patent: WO 97/23227 (1997-07-01), None
patent: WO 98/30210 (1998-07-01), None
Kokubo, Takemasa, et al. “Diffusion of drug in acrylic-type pressure-sensitive adhesive matrices. I. Influence of physical property of the matrices on the drug diffusion”, Journal of Controlled Release 17 Sep. 1991, No. 1, Amsterdam, NL.

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