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:
Jan. 09, 2024
Filed:
Oct. 11, 2019
Asahi Chemical Synthetic Co., Ltd., Tokyo, JP;
Daisuke Kumon, Tokyo, JP;
Akito Nakagawa, Tokyo, JP;
ASAHI CHEMICAL SYNTHETIC CO., LTD., Tokyo, JP;
Abstract
This hot-melt composition contains, per 100 parts by mass of a hydrogenated styrene thermoplastic elastomer having a styrene-based polymer block at both ends thereof and a hydrogenated diene polymer block at a middle portion thereof, and having a mass-average molecular weight of 250,000 to 600,000, 150 to 450 parts by mass of an aromatic tackifying resin having a softening point of 135 to 160° C. and a mass-average molecular weight of 500 to 2,500, 100 to 500 parts by mass of a tackifying resin for a hydrogenated diene polymer block which has a softening point of 100 to 160° C., 500 to 1,500 parts by mass of a non-aromatic hydrocarbon oil having a kinematic viscosity at 40° C. of 90 mm/s or higher, wherein 30% by mass or more of the non-aromatic hydrocarbon oil is a non-aromatic hydrocarbon oil having a kinematic viscosity at 40° C. of 300 to 500 mm/s.