POLYOLEFIN COMPOUND WITH LOW COEFFICIENT OF LINEAR THERMAL EXPANSION Russian patent published in 2012 - IPC C08L23/10 C08L23/16 C08K3/00 C08K5/00 B82B1/00 

FIELD: chemistry.

SUBSTANCE: composition contains 50-70 wt % heterophase propylene copolymer, 2-10 wt % ethylene and alpha-olefin based elastomer, 20-46 wt % inorganic filler and at least two different α-crystal-nucleating agents, total weight content of which ranges from 0.0011 to 2.0%. The heterophase propylene copolymer contains 70-90 wt % propylene homopolymer with respect to the weight of the heterophase propylene copolymer and 10-30 wt % ethylene-propylene rubber with respect to the weight of the heterophase propylene copolymer, and the alpha-olefin used in the ethylene and alpha-olefin based elastomer is C₄-C₁₀ alpha-olefin.

EFFECT: defined ratio of components of the composition ensures balance of its properties, combination of low coefficient of linear thermal expansion, high rigidness and high temperature of thermal deformation.

11 cl, 2 tbl, 5 ex