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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.:

US 10940229 B1

PDFFull Text
Date of Patent:
Mar. 09, 2021

Filed:

Sep. 29, 2017

Material for adhesion prevention

Applicants:

Toray Industries, Inc., Tokyo, JP;

Nanotheta Co., Ltd., Tokyo, JP;

Inventors:

Akihiro Saito, Otsu, JP;

Megumi Nakanishi, Otsu, JP;

Kazuhiro Tanahashi, Otsu, JP;

Toru Arakane, Tokyo, JP;

Motonori Hochi, Otsu, JP;

Ai Suzuki, Otsu, JP;

Koji Okabayashi, Tokyo, JP;

Shinji Takeoka, Tokyo, JP;

Toshinori Fujie, Tokyo, JP;

Yuya Ishiduka, Tokyo, JP;

Shinya Ohtsubo, Tokyo, JP;

Assignees:

Toray Industries, Inc., Tokyo, JP;

Nanotheta Co., Ltd., Tokyo, JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Celeste A Roney

Int. Cl.
CPC ...
A61L 15/26 (2006.01); A61L 31/14 (2006.01); A61L 31/12 (2006.01); A61L 31/06 (2006.01); A61L 15/64 (2006.01); A61L 15/28 (2006.01); A61P 41/00 (2006.01); C08G 65/26 (2006.01); C08L 5/08 (2006.01);
U.S. Cl.
CPC ...
A61L 15/26 (2013.01); A61L 15/28 (2013.01); A61L 15/64 (2013.01); A61L 31/06 (2013.01); A61L 31/12 (2013.01); A61L 31/125 (2013.01); A61L 31/14 (2013.01); A61L 31/148 (2013.01); A61P 41/00 (2018.01); A61L 31/145 (2013.01); C08G 65/2615 (2013.01); C08L 5/08 (2013.01);
Abstract

A material for adhesion prevention can be adhered to biological tissue with certainty and has improved tissue adhesiveness and biodegradability. Such material for adhesion prevention is composed of: a 1- to 1,000-μm-thick water-soluble support layer comprising a water-soluble polymer; and a 1- to 1,000-μm-thick adhesion prevention layer comprising a biodegradable polymer. The biodegradable polymer has a structure in which a branched polyalkylene glycol comprising 3 to 8 terminal hydroxyl groups per molecule is bound to a polyhydroxy alkanoic acid, and a mass ratio of the branched polyalkylene glycol relative to the total mass is 1% to 30%.

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