| abstract |
PURPOSE: The titled composition that is prepared by adding a specific modified propylene resin to a polypropylene polymer resin and a styrene-containing resin, as an improver for compatibility between them, thus showing high mechanical strength, heat resistance, oil resistance and fabricability. n CONSTITUTION: (A) 5W95pts.wt. of a propylene polymer resin and (B) 95W5pts. wt. of a styrene-containing resin are combined with (C) 2W200pts.wt. per 100pts. wt. of the total of A and B, of a modified polypropylene copolymer, which is obtained by heating an aqueous suspension containing (i) 100pts.wt. of particles of a random copolymer of 0.88W0.89g/cm 3 density, consisting of an overhalf weight of propylene and ethylene, (ii) 5W200pts.wt. of an aromatic vinyl monomer and (iii) 0.01W1pt.wt., per 100pts.wt. of component (ii), of a radical polymerization initiator, which has a decomposition point of 85W130°C for giving the half life of 10hr. Then, the mixture is heated under such conditions as component (ii) does not decompose, until the amount of free component (ii) becomes lower than 20wt%, then raising the temperature to complete the polymerization. n COPYRIGHT: (C)1984,JPO&Japio |