| 摘要 |
PURPOSE:The titled composition, consisting of propylene polymer which is polymerized in the presence of a stereoregular catalyst and heat-treating the polymer in the presence of an organic peroxide and a specific fatty acid ester and having improved hardly whitening property, impact resistance, rigidity and fluidity. CONSTITUTION:A composition consisting of (A) 100pts.wt. polymer which is obtained by heat-treating a propylene polymer, prepared by polymerizing propylene in the presence of a stereoregular catalyst, e.g. a mixture consisting of a transition metal halogen compound, preferably titanium trichloride with an organoaluminum compound at 30-90 deg.C in many stages and consisting of (i) 50-94wt% propylene homopolymer having 0.5-<3.5dl/g intrinsic viscosity, (ii) 3-30wt% propylene homopolymer having >=3.5dl/g intrinsic viscosity and (iii) 3-30wt% propylene-ethylene copolymer having >=2.8dl/g intrinsic viscosity in the presence of an organic peroxide and adjusting the degree of decomposition to 1.2-80 and (B) 0.02-2pts.wt. ester of a 12-22C aliphatic saturated monofunctional carboxylic acid with a polyhydric alcohol. |
