Hydrogenated Block Copolymer Composition and Pressure-Sensitive Adhesive Composition

摘要

A hydrogenated block copolymer composition, comprising:
a component (A) comprising at least one polymer block comprising a vinyl aromatic hydrocarbon as a primary component and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 30,000 or higher and 500,000 or lower, anda component (B) comprising at least two polymer blocks comprising a vinyl aromatic hydrocarbon and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 50,000 or higher and 1,000,000 or lower,wherein the composition satisfies predetermined requirements.

主权项

1. A hydrogenated block copolymer composition,
comprising:
a component (A) comprising at least one polymer block comprising a vinyl aromatic hydrocarbon as a primary component and at least one polymer block comprising a conjugated diene compound as a primary component, and having a weight-average molecular weight of 30,000 or higher and 500,000 or lower, anda component (B) comprising at least two polymer blocks comprising a vinyl aromatic hydrocarbon as a primary component and at least one polymer block comprising a conjugated diene compound as a primary component, and having a weight-average molecular weight of 50,000 or higher and 1,000,000 or lower; wherein the composition satisfies requirements (a) to (c) below: (a) a total degree of hydrogenation H (%) of unsaturated double bonds based on the conjugated diene compound is 5 to 90%; (b) a maximum value of a loss factor tan δ at from −100° C. to 0° C. is 0.4 to 4.0; and (c) a ratio between the weight-average molecular weight of the component (A) and the weight-average molecular weight of the component (B) (the weight-average molecular weight of the component (B)/the weight-average molecular weight of the component (A)) is from 1.3 to 10.