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. 04, 2015
Filed:
Aug. 05, 2009
Hitoshi Takahira, Ibaraki, JP;
Satomi Yoshie, Ibaraki, JP;
Tadashi Nakajima, Ohtsu, JP;
Daiki Funaoka, Ohtsu, JP;
Katsuya Shimeno, Ohtsu, JP;
Hitoshi Takahira, Ibaraki, JP;
Satomi Yoshie, Ibaraki, JP;
Tadashi Nakajima, Ohtsu, JP;
Daiki Funaoka, Ohtsu, JP;
Katsuya Shimeno, Ohtsu, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides a polyester, a polyester composition and a pressure-sensitive adhesive composition capable of obtaining a pressure-sensitive adhesive which is global-environmentally friendly and is excellent in pressure-sensitive adhesion properties, using a plant-derived raw material; and a pressure-sensitive adhesive layer and a pressure-sensitive adhesive sheet which can be obtained by using the same. A polyester of the present invention is a polyester comprising at least a lactic acid unit, a dibasic acid unit and a glycol unit, wherein the dibasic acid unit contains dimer acid, and the polyester has a glass transition temperature as measured at a temperature rising rate of 20° C./minute using a differential scanning calorimeter, of −70 to −20° C., a weight average molecular weight of 20,000 to 300,000 and a hydroxyl value of 1 to 100 mgKOH/g.