METHOD OF PLASTOELASTOMERIC COMPOSITION PREPARING Russian patent published in 1995 - IPC

FIELD: plastic industry. SUBSTANCE: method involves extruding the following mixture at 160-240 C, mln. p.: polypropylene 26-46; copolymer of ethylene with propylene or triple copolymer of ethylene with propylene and butadiene 1.3-7.4; organic peroxide 1.7-2.0; paraffin oil 74, and difurfuralaldazine or difurfuryl-1,4-pentadiene-3-one 0.25-0.37. Propylene content in copolymers is 38-47% , they have no inversion of polypropylene links "head-to-head" or "tail-to-tail". Preferably, copolymers have value Mw/Mn 9-12, specific viscosity 3.5-3.8 dl/g, product of relative activity of ethylene and propylene 7-9. EFFECT: improved method of composition preparing. 2 cl, 1 tbl