The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1999
Filed:
Mar. 07, 1997
Nitto Denko Corporation, Osaka, JP;
Abstract
The present invention provides a percutaneous absorption preparation which has excellent pressure-sensitive adhesive characteristics and exerts excellent percutaneous absorption property. A crosslinking agent is added to a solution of an acrylic copolymer prepared by copolymerizing a (meth)acrylic acid alkyl ester with a functional monomer, and the acrylic copolymer is partially crosslinked. A composition containing the crosslinked acrylic copolymer is pulverized to prepare a pressure-sensitive adhesive solution comprised of the acrylic copolymer containing crosslinked acrylic copolymer particles. Thereafter, a drug for percutaneous absorption use, a percutaneous penetration enhancer are added to the pressure-sensitive adhesive solution, thereby producing the percutaneous absorption preparation.