Skin adhesive sheet, and sheet-like external preparation for skin
AssigneeToray Industries, Inc.
InventorsRumiko Kitagawa, Masataka Nakamura
Life of this patent
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Abstract
A skin adhesive sheet is disclosed which is good in tackiness to the skin surface, does not easily dry even when used for a long time, can maintain flexibility, and is small in the shape variation. The skin adhesive sheet includes a copolymer containing the following components A and C as polymerization components, and having a water content less than 10% by mass: component A: a polysiloxane macromonomer having a plurality of polymerizable functional groups per molecule, and having a number average molecular weight of 6,000 or more; and component C: a polymerizable monomer having an alkyl group and having no fluoroalkyl group.
Claims11
A skin adhesive sheet, comprising a copolymer containing the following components A and C as polymerization components, and having a water content less than 10% by mass, and comprising 7 to 40 parts by mass of the component C based on 100 parts by mass in total of polymerization components of the copolymer:
- component A:
- a polysiloxane macromonomer having a plurality of polymerizable functional groups per molecule, and having a number average molecular weight of 6,000 or more;
- and
- component C:
- a polymerizable monomer having an alkyl group and having no fluoroalkyl group, wherein component C is a (meth)acrylic acid alkyl ester,
- wherein the skin adhesive sheet is not coated with a hydrophilic substance.
Dependencies are inferred from the claim text.