HYDROGENATED BLOCK COPOLYMER COMPOSITION AND A SELF-ADHESIVE COMPOSITION Russian patent published in 2018 - IPC C08F297/04 C09J153/02 C09J107/00 C09J109/00 C08L53/02 C08L91/00 C08L93/04 

FIELD: chemistry.

SUBSTANCE: invention relates to hydrogenated block copolymer composition as well as to self-adhesive composition in which a hydrogenated block copolymer composition is used. Hydrogenated block copolymer composition comprises a component (A) comprising at least one polymer block comprising a vinyl aromatic hydrocarbon as a main component and at least one non- one polymer block comprising a conjugated diene conjugated diene compound as a main component and having a weight average molecular weight of 30,000 or more and 175,000 or less, and component (B) comprising at least two polymer blocks including a vinyl aromatic hydrocarbon and at least one polymer block comprising a conjugated diene compound of a diene as a main component, and having a weight average molecular weight of 50,000 or higher and 500,000 or less, wherein the total degree of hydrogenation of the H (%) unsaturated double bonds based on the conjugated double diene compounds is from 15 to 80 mol% maximum value of the loss angle tangent δ in the temperature range from -100 °C to 0 °C is from 0.4 to 4.0, and the ratio of the weight average molecular weight of component (A) and the weight average molecular weight of component (B) (weight average molecular weight of component (B)/weight average molecular weight of component (A)) is 1.3 to 10.

EFFECT: self-adhesive composition comprising a hydrogenated block copolymer composition has excellent adhesion properties when applying pressure, namely to high retention, tack and adhesion strength, and is intended for use in various types of self-adhesive tapes, self-adhesive sheets of paper, films, plates, can be used as adhesives on the reverse side of the products to fix them.

19 cl, 5 tbl