BRANCHED COPOLYMERS BASED ON UNSATURATED NITRILES AND ON CONJUGATED DIENES

摘要

The invention relates to branched copolymers based on unsaturated nitriles a nd on conjugated dienes. The branched copolymers are characterized in that: the content of bound unsaturated nitrile ranges from 15 to 50 wt. %; the Mooney viscosity ranges from 15 to 150 M.E. [ML 1 + 4/100 ~C]; the chain branching ranges from 0 to 20~ (determined by the .DELTA..delta.B value), and; the solubility, measured in methyl ethyl ketone, is >= 85 wt. % at 20 ~C. The inventive copolymers can be used for producing hydrogenated copolymers based on unsaturated nitriles and on conjugated dienes (HNBR), for producing shape d bodies of all types, which are produced in injection molding or extrusion methods, and for improving the flowability of elastomers.