Olefinic polymer composition containing inorganic filler

Claim 1

A high impact olefinic polymer composition comprising (1) a continuous matrix of a crystalline olefinic polymer which is selected from a crystalline homopolymer of ethylene or propylene, and a crystalline copolymer consisting essentially of a major proportion of at least one monomer selected from the group consisting of ethylene and propylene with a minor proportion of another ethylenically unsaturated monomer, (2) a dispersed phase of an impact absorbing rubbery polymer component or its composite dispersed in the matrix, (3) a finely divided inorganic filler having a particle diameter less than 2 microns and smaller than that of the dispersed phase, said inorganic filler being filled substantially entirely in said dispersed phase, (4) said dispersed phase being selected from the group of the following types I-IV: I. a dispersed phase consisting of (A') a reactive derivative of a crystalline olefinic polymer which cannot be uniformly mixed with the olefinic polymer forming the matrix, or (B) a composition composed of a crystalline olefinic polymer (A) and the reactive derivative of the crystalline olefinic polymer (A'), said (A') or (B) being surrounded by (C) an impact absorbing rubbery polymer, and said inorganic filler (3) being filled in said (A) or (B); II. a dispersed phase consisting of (C') a reactive derivative of an impact absorbing rubbery polymer (C), or (D) a composition composed of the rubbery polymer (C) and the reactive derivative of the rubbery polymer (C'), and said inorganic filler (3) being filled in the component (C') or (D), III. a dispersed phase consisting of (A) a crystalline olefinic polymer which cannot be uniformly mixed with the olefinic polymer forming the matrix, said (A) being surrounded by either (C') a reactive derivative of an impact absorbing rubbery polymer or (D) a composition composed of the rubbery polymer (C) and the reactive derivative of the rubbery polymer (C'), and said inorganic filler (3) being filled in said component (C') or (D), and IV. a dispersed phase consisting of (A') a reactive derivative of a crystalline olefinic polymer which cannot be uniformly mixed with olefinic polymer forming the matrix, or (B) a composition composed of a crystalline olefinic polymer (A) and the reactive derivative of the crystalline olefinic polymer (A'), said (A') or (B) being surrounded by either (C') a reactive derivative of an impact absorbing rubbery polymer, or (D) a composition composed of the rubbery polymer (C) and the reactive derivative of the rubbery polymer (C') and said inorganic filler (3) being filled in both (A') or (B) and (C') or (D), and (5) said impact absorbing rubbery polymer (C) being an ethylene/propylene copolymer rubber, an ethylene/propylene/nonconjugated diene terpolymer, an ethylene/butene copolymer rubber, a styrene/conjugated diene copolymer, or a polydiolefin, and (6) said reactive derivative of an impact absorbing rubbery polymer having hydrophillic groups introduced in the impact absorbing rubbery polymer, and (7) said reactive derivative of a crystalline olefinic polymer having hydrophillic groups introduced in the crystalline olefinic polymer which cannot be uniformly mixed with the crystalline olefinic polymer forming the matrix.