FIELD: polymer materials.
SUBSTANCE: invention relates to soft polymer compositions containing large amount of inorganic fillers. Composition according to invention contains 20-60% heterophase polyolefin composition (I) and 40-80% inorganic filler (II) selected from fire-retardant inorganic fillers and inorganic oxides or salts. Moreover, heterophase polyolefin composition I includes 8 to 25% crystalline polymer component (A) selected from propylene homopolymer, propylene copolymers, and mixtures thereof, and 75 to 92% elastomer fraction (B) composed of at least elastomeric propylene 04 ethylene copolymer with 15-45% of at least one α-olefin. Heterophase polyolefin composition I is characterized by solubility in xylene at room temperature above 50%, while intrinsic viscosity of xylene-soluble fraction ranges between 3.0 and 6.5 dL/g. Polyolefin compositions of invention find their use as substitute of plasticized polyvinylchloride.
EFFECT: increased plasticity of materials at the same good thermoplastic properties.
15 cl, 1 dwg, 2 tbl, 10 ex
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