EPOXYDIZED DIENE BLOCK-COPOLYMER Russian patent published in 1998 - IPC

FIELD: polymers. SUBSTANCE: cross-linked epoxydized diene block-copolymer is obtained on the basis of the parent block-copolymer that can contain two different structural formulas. The parent polymers have blocks of diene polymer (molecular mass is 300-200000 Da), blocks of monoalkenylaromatic polymer (500-50000 Da). Macromolecule can contain coupling agent or coupling monomers. The parent block-copolymer is hydrogenated up to content of aliphatic double bond 0.1-5 meq/1 g polymer, epoxydized up to content of epoxy-groups 0.1-3 meq/1 g polymer followed by chemical or radiation-induced cross-linking up to gel content 30%, not less. The prepared compositions were used for different purposes. EFFECT: improved method of preparing. 3 cl, 21 tbl