The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt% propylene and 0.1 to 10 wt% α-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are β-nucleated propylene polymers, whereby the β-nucleated propylene homopolymers have an IRτ >0.98, a tensile modulus >1500 MPa at +23 °C and a Charpy impact strength, ≥3 kJ/m2 at -20°C using notched test specimens, and the β-nucleated propylene block copolymers are polymers having an IRτ of the propylene homopolymer block of >0.98, a tensile modulus ≥1100 MPa at +23 °C and a Charpy impact strength of >6kJ/m2, at -20°C using notched test specimens.
The propylene polymers with an improved property spectrum are suitable for producing molded parts in a pipe system, such as pipes and fittings, inspection chambers, pipe ducting systems, extrusion or compression molded sheets and the like.
本发明涉及具有改进性能,特别是具有改进刚度和冲击强度的新型
丙烯聚合物,包括
丙烯均聚物或
丙烯嵌段共聚物,其中
丙烯含量为 90.0 至 99.9 wt%,α-烯烃含量为 0.1 至 10 wt%,具有 2 或 4 至 18 个碳原子,或其混合物,其中
丙烯均聚物或
丙烯嵌段共聚物为 β-核
丙烯聚合物,其中 β-核
丙烯均聚物的 IRτ >0.其中,β核
丙烯均聚物的IRτ大于0.98,在+23℃时的拉伸模量大于1500兆帕,在-20℃时使用缺口试样的夏比冲击强度≥3kJ/m2,而β核
丙烯嵌段共聚物是
丙烯均聚物嵌段的IRτ大于0.98,在+23℃时的拉伸模量≥1100兆帕,在-20℃时使用缺口试样的夏比冲击强度大于6kJ/m2的聚合物。
性能谱得到改善的
丙烯聚合物适用于生产管道系统中的模制部件,如管道和管件、检查室、管道系统、挤压或压缩模制板材等。