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:
Aug. 03, 2021
Filed:
Sep. 30, 2016
Teikoku Seiyaku Co., Ltd., Kagawa, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Satoshi Kawakami, Sanuki, JP;
Manabu Sogabe, Awa, JP;
Taiki Shibata, Higashikagawa, JP;
Yasushi Horikawa, Takamatsu, JP;
Hiroaki Hasegawa, Ibaraki, JP;
TEIKOKU SEIYAKU CO., LTD, Kagawa, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
The present invention provides a star-shaped acrylic block polymer having a star-shaped structure in which at least three chain polymer portions radiate from a mercapto group situated at the center, wherein (meth)acrylic acid alkyl ester structural units having 7-17 carbon atoms account for 30-99.9% by mass of whole structural units of the star-shaped acrylic block polymer, and at least one of the chain polymer portions has a copolymer structure of polymerizable monomers containing a (meth)acrylic acid alkyl ester having 7-17 carbon atoms and a weakly basic monomer; and a medical patch containing an adhesive composition containing a salt of a basic drug and the star-shaped acrylic block polymer as an adhesive that exhibits high drug efficacy, that does not cause a decrease in adhesive property of an adhesive base due to an additive, and that causes less skin irritation.