STRETCHABLE PATCH

A stretch plaster comprising a support membrane having a thickness of 1 to 50 mu m and a drug containing adhesive layer having a thickness of 3 to 400 mu m, 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 hav...

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Bibliographic Details
Main Authors OHATA, AKIKO, HIDAKA, OSAFUMI
Format Patent
LanguageEnglish
French
German
Published 22.09.2004
Edition7
Subjects
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
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Summary:A stretch plaster comprising a support membrane having a thickness of 1 to 50 mu m and a drug containing adhesive layer having a thickness of 3 to 400 mu m, 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 150g 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.
Bibliography:Application Number: EP20010908314