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:
Oct. 06, 2020
Filed:
Sep. 25, 2018
Tokyo Ohka Kogyo Co., Ltd., Kawasaki-shi, JP;
Koki Tamura, Kawasaki, JP;
Hirofumi Imai, Kawasaki, JP;
Toshiyuki Ogata, Kawasaki, JP;
Atsushi Kubo, Kawasaki, JP;
Takahiro Yoshioka, Kawasaki, JP;
TOKYO OHKA KOGYO CO., LTD., Kawasaki-Shi, JP;
Abstract
An adhesive composition contains (a) a resin consisting of (i) a block copolymer or (ii) 35% by weight or greater and less than 100% of the block copolymer and 65% by weight or less of a random copolymer, the block copolymer having a weight average molecular weight in a range of 50,000 to 150,000, wherein the block copolymer is a diblock copolymer, a triblock copolymer, or a combination thereof, and includes a styrene group, both terminals of a main chain of the triblock copolymer are styrene groups; (b) a solvent which includes a condensed polycyclic hydrocarbon, wherein an adhesive layer formed by using the adhesive composition has a Young's modulus of 0.1 GPa or greater at 23° C., a storage modulus (G') of 1.5×10Pa or less at 220° C., and a loss factor (tan σ) of 1.3 or less at 220° C.; and (c) a thermal polymerization inhibitor.