Crosslinkable pressure-sensitive adhesive for the skin

Details Crosslinkable pressure-sensitive adhesive for the skin Crosslinkable pressure-sensitive adhesive for the skin

A - Human Necessities

61

K

A61K 47/32 (2006.01) A61F 13/02 (2006.01) A61K 9/70 (2006.01) C09J 7/02 (2006.01) C09J 133/06 (2006.01)

Patent

CA 2561361

The invention aims at providing a crosslinkable pressure-sensitive adhesive for the human skin which has good tackiness to the human skin and good peelability therefrom and which is little irritant to the human skin and crosslinkable pressure-sensitive adhesive sheets for the skin which are suitable for medical or cosmetic use and at providing compositions suitable for the production of the pressure-sensitive adhesive which are improved in shelf stability. The pressure-sensitive adhesive is composed of 100 parts by mass of an acrylic copolymer (A) which comprises alkyl (meth)acrylates as the main constituents and 3 to 45 % by mass of diacetone acrylamide as the essential constituent and which is free from free carboxyl groups and 0.1 to 30 parts by mass of an acrylic copolymer (B) which comprises alkyl (meth)acrylates as the main constituents and contains primary amino groups and/or carbohydrazide groups in pendants and which is free from free carboxyl groups. Compositions obtained by dissolving the copolymers (A) and (B) in a solvent containing at least 5.0 % by mass of acetone and/or butanone based on the whole solvent can be preserved for a long period.

L'invention a pour but de fournir un adhésif autocollant réticulable pour la peau humaine lequel a un bon pouvoir collant sur la peau humaine et une bonne aptitude à se décoller de celle-ci et lequel est peu irritant pour la peau humaine et des feuilles d'adhésif autocollant réticulable pour la peau lesquelles conviennent pour une utilisation médicale ou cosmétique et de fournir des compositions convenant pour la production de l'adhésif autocollant lesquelles sont meilleures en termes de stabilité au stockage. L'adhésif autocollant est composé de 100 parties en poids d'un copolymère acrylique (A) lequel comprend des (méth)acrylates d'alkyle comme principaux constituants et 3 à 45 % en poids de diacétone acrylamide comme composant essentiel et lequel est exempt de groupes carboxyles et 0,1 à 30 parties en poids d'un copolymère acrylique (B) lequel comprend des (méth)acrylates d'alkyle comme principaux constituants et contient des groupes amino primaires et/ou des groupes carbohydrazide dans les chaînes latérales et lequel est exempt de groupes carboxyles. Les compositions obtenues en dissolvant les copolymères (A) et (B) dans un solvant contenant au moins 5,0 % en poids d'acétone et/ou de butanone sur la base du solvant total peuvent être conservées sur une longue durée.

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