Patent ID: 11866615
Assignee: ASAHI CHEMICAL SYNTHETIC CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A hot-melt composition comprising, with respect to 100 parts by mass of a hydrogenated styrene thermoplastic elastomer having styrene-based polymer blocks at both ends and a hydrogenated diene polymer block at a middle portion and having an a mass-average molecular weight of 250,000 to 600,000 (A), 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 (B), 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. (C), 500 to 1,500 parts by mass of a non-aromatic hydrocarbon oil having a kinematic viscosity at 40° C. of 90 mm2/s or higher (D), wherein 30% by mass or more of the non-aromatic hydrocarbon oil (D) is a non-aromatic hydrocarbon oil having a kinematic viscosity at 40° C. of 300 to 500 mm2/s (D-1).