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    • 3. 发明授权
    • Impact strength, stress-whitening and bruise-resistance for impact
modified polypropylene
    • 抗冲改性聚丙烯的冲击强度,应力增白和抗冲击性
    • US5459201A
    • 1995-10-17
    • US212754
    • 1994-03-11
    • Ramesh N. ShroffChun D. Lee
    • Ramesh N. ShroffChun D. Lee
    • C08J3/22C08L23/10C08L23/12C08L23/16C08L23/26
    • C08J3/226C08L23/10C08L23/12C08J2323/02C08J2421/00C08L2023/42C08L2023/44C08L23/16
    • The present invention relates to a process for preparing high melt flow rate thermoplastic compositions that have improved impact and bruise-resistance properties and to the thermoplastic composition that are produced by the process of the instant invention. Specifically, the process comprises the steps of precontacting a non-crosslinked elastomeric polymeric component with a peroxide compound at a temperature below the decomposition temperature of the peroxide and below the melting point of the non-crosslinked polymeric component to produce a peroxide adsorbed polymeric component; and melt mixing the aforementioned peroxide adsorbed polymeric component with a high propylene content polymeric component selected from the group consisting of homopolymers of propylene, block copolymers of propylene and ethylene, and thermoplastic olefin polymers at a temperature above the decomposition temperature of the peroxide.
    • 本发明涉及一种制备具有改善的冲击和抗腐蚀性能的高熔体流动速率的热塑性组合物的方法以及通过本发明的方法生产的热塑性组合物。 具体地说,该方法包括以下步骤:在低于过氧化物的分解温度并低于非交联聚合物组分的熔点的温度下将过渡化合物预先接触过氧化物,以产生过氧化物吸附的聚合物组分; 并且在高于过氧化物分解温度的温度下将上述过氧化物吸附的聚合物组分与选自丙烯的均聚物,丙烯和乙烯的嵌段共聚物以及热塑性烯烃聚合物的高丙烯含量的聚合物组分熔融混合。