TUBE USING HYDROGENATED BLOCK COPOLYMER Russian patent published in 2019 - IPC C08F8/04 B32B1/08 B32B27/00 B32B27/32 C08F297/04 C08L23/10 C08L53/02 

FIELD: chemistry.

SUBSTANCE: present invention relates to embodiments of a tube comprising at least an outer layer and an inner layer, wherein the outer layer contains a polypropylene resin and the inner layer contains a hydrogenated block copolymer (a), wherein the hydrogenated block copolymer (a) contains a polymer block (C) in the molecule, mainly comprising a conjugated diene compound, a polymer block (B), mainly including a conjugated diene compound, and polymer block (S), mainly including vinyl aromatic compound, in hydrogenated block copolymer (a) content of polymer block (C), mainly including conjugated diene compound, ranges from 1 to 30 wt. %, content of polymer block (B), mainly including conjugated diene compound, ranges from 69 to 98 wt. %, and content of polymer block (S), mainly including vinyl aromatic compound, ranges from 1 to 20 wt. %, and polymer block (C), mainly including conjugated diene compound, is characterized by content of vinyl bonds before hydrogenation in range from 1 to 25 mol. %, polymer block (B), mainly including conjugated diene compound, is characterized by content of vinyl bonds up to hydrogenation in range of 60 to 100 mol. %, and the hydrogenated block copolymer (a) has a degree of hydrogenation of 80 mol. % or more. Invention also relates to tube versions, where inner layer contains polypropylene resin and outer layer contains said hydrogenated block-copolymer (a).

EFFECT: technical result is the development of tubes, having excellent transparency, flexibility, resistance to fracture, ability to recover form after deformation and resistance to adhesion.

22 cl, 1 dwg, 3 tbl, 18 ex