UV EMISSION-HARDENED BLOCK-COPOLYMER COMPOSITION (VERSION) AND METHOD OF PREPARATION THEREOF Russian patent published in 2000 - IPC

FIELD: polymer materials. SUBSTANCE: composition contains (i) 100 wt parts of multilink block- copolymer containing at least one polymer block A consisting of monovinyl aromatic compound and at least one polymer block B consisting of conjugated diene and (ii) 0.5-30 wt parts of at least one photoinitiator containing carbonyl group directly linked to at least one aromatic ring system. Composition is distinguished by having no cross- linking agent and by that multilink block-copolymer has structure depicted by one of the following general formulas: (AB)_nX, (BA)_nX, (ABA)_nX, (BAB)_nX or (AB)_pBqX, wherein A and B are as defined above, each block A having apparent molecular weight between 1000 and 50000 and B between 1000 and 250000, whereas content of monovinyl aromatic compound ranges from 5 to 50% of the weight of total mass of block copolymer, n is integer equal to or more than 2; p and q are integers equal to at least 1; X is residue of association agent. Composition is hardenable in oxygen-containing atmosphere. EFFECT: enabled UV emission-assisted hardening in absence of cross-linking agents. 11 cl, 20 tbl, 8 ex