SYNDIOTACTIC POLYPROPYLENE RESIN COMPOSITION
PURPOSE: To obtain the subject composition excellent in molding properties and a balance between the stiffness and impact strength of its molded product by melt-blending a specific polypropylene with a condensation reaction product of a copolymer. CONSTITUTION: This syndiotactic polypropylene resin...
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Zusammenfassung: | PURPOSE: To obtain the subject composition excellent in molding properties and a balance between the stiffness and impact strength of its molded product by melt-blending a specific polypropylene with a condensation reaction product of a copolymer. CONSTITUTION: This syndiotactic polypropylene resin composition is obtained by melt-blending of (A) a crystalline polypropylene having >=0.6 syndiotactic pentad fraction with (B) a condensation reaction product of a copolymer obtained by the condensation reaction of an alkenylsilane such as a compound of the formula: H2 C=CH-(CH2 )n -SiHp R3-p (n is 0-12; p is 1-3; R is a 1-12C hydrocarbon residue) with a copolymer of prophylene in a ratio e.g. 99.9-60 pts.wt. component A and 0.1-40 pts.wt. component B. Further, for the condensation reaction to obtain the component B, e.g. a compound of the formula: R n M(O- R )4-n (R , R are each R; n is 0-4; M is titanium, zirconium and hafnium), etc., can be used as a catalyst. |
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