COMPOSITIONS ON PROPYLENE COPOLYMER BASE WITH GOOD IMPACT ELASTICITY AT LOW TEMPERATURES AND HIGH DEGREE OF TRANSPARENCY Russian patent published in 2008 - IPC C08L23/00 C08L23/10 C08L23/14 C08L23/16 

FIELD: chemistry.

SUBSTANCE: composition consists of A) propylene homopolymer with isotactic structure, B) at least one propylene copolymer, containing 12-18 wt % of ethylene, C) optionally an additive, chosen from stabilisers, lubricants, mold pastes, fillers, nucleating agents, antistatics, plasticisers, dyes, pigments, or fire retardants, where A and B are present as distinct phases, proportion A to B being from 80:20 to 60:40. The above propylene copolymer composition has turbidity index ≤ 30% counted on propylene copolymer composition 1 mm length path, and transition temperature of propylene copolymer composition from brittle fracture to unbreakable destruction ≤ -15°C.

EFFECT: good impact elasticity at low temperatures; good transparency; good whiten properties under tension; relatively high melting point; high rigidity; good thermal deformation resistance combined with low extractable substance content; comonomers uniform distribution, and good organoleptic properties.

9 cl, 3 tbl, 1 ex