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64 条记录 (耗时 0.017 秒)

    Process for the production of polar-modified polypropylene and its use
    4.
    发明授权
    Process for the production of polar-modified polypropylene and its use 失效
    生产极性改性聚丙烯的方法及其用途

    公开(公告)号：US4370450A

    公开(公告)日：1983-01-25

    申请号：US266949

    申请日：1981-05-26

    申请人： Ulrich Grigo ,  Josef Merten ,  Rudolf Binsack

    发明人： Ulrich Grigo ,  Josef Merten ,  Rudolf Binsack

    IPC分类号： C08F220/00 ,  C08F2/18 ,  C08F30/00 ,  C08F30/08 ,  C08F220/04 ,  C08F255/00 ,  C08F255/02 ,  C08L23/12

    CPC分类号： C08F255/02 ,  C08L23/12 ,  C08K7/14 ,  C08L51/06

    摘要： A process for the production of modified polypropylene particles by polymerizing vinyl monomers in aqueous suspension wherein (a) an aqueous suspension is prepared which, based on 100 to 2000 parts by weight of water, contains 100 parts by weight of polypropylene particles, 4 to 30 parts by weight of a polar vinyl monomer and based on 100 parts by weight of the monomer, 0.1 to 10 parts by weight of a radical chain polymerization initiator which has a half life of at least 2 h at a temperature of 80.degree. to 135.degree. C. and 10 to 1200 parts by weight of an organic solvent which is capable of swelling polypropylene, of which the boiling point at 760 Torr is at least 100.degree. C. and which is miscible with the monomers in any proportion; (b) the aqueous suspension is heated without decomposition of the initiator, the polypropylene being swollen and the monomer penetrating into the polypropylene, after which (c) the aqueous suspension is kept at temperatures of .gtoreq.85.degree. C. until polymerization of the monomer has ceased. The modified polypropylene is used to improve the mechanical properties of unmodified, optionally glass-fibre-reinforced polypropylene.

    摘要翻译： 一种通过在水性悬浮液中聚合乙烯基单体生产改性聚丙烯颗粒的方法，其中（a）制备水性悬浮液，其基于100至2000重量份的水，包含100重量份的聚丙烯颗粒，4至30 重量份的极性乙烯基单体，基于100份单体，0.1至10份重量的自由基链聚合引发剂，其在80至135℃的温度下具有至少2小时的半衰期 和10〜1200重量份能够溶胀聚丙烯的有机溶剂，其沸点在760乇至少为100℃，并且可与任何比例的单体混溶; （b）水性悬浮液加热而不分解引发剂，聚丙烯溶胀，单体渗透到聚丙烯中，然后（c）将水悬浮液保持在≥85℃的温度，直到 单体已停止。 改性聚丙烯用于改善未改性的任选的玻璃纤维增​​强聚丙烯的机械性能。

    Mixtures of polypropylene and liquid saturated diorganopolysiloxanes
    10.
    发明授权
    Mixtures of polypropylene and liquid saturated diorganopolysiloxanes 失效
    聚丙烯和液体饱和二有机聚硅氧烷的混合物

    公开(公告)号：US4287108A

    公开(公告)日：1981-09-01

    申请号：US119940

    申请日：1980-02-08

    申请人： Ulrich Grigo ,  Leo Morbitzer ,  Klaus-Peter Arlt ,  Rudolf Binsack ,  Josef Merten

    发明人： Ulrich Grigo ,  Leo Morbitzer ,  Klaus-Peter Arlt ,  Rudolf Binsack ,  Josef Merten

    IPC分类号： C08L23/00 ,  C08L23/12 ,  C08L87/00 ,  C08L101/00 ,  C08L83/04

    CPC分类号： C08L23/12 ,  C08L83/04

    摘要： A homogeneous, thermoplastic mixture comprising (A) from 85 to 99.5% by weight of isotactic polypropylene; and (B) from 15 to 0.5% by weight of a liquid, saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 cSt at 20.degree. C.The elastic properties of moulded articles produced from the polypropylene/diorganopolysiloxane mixtures of the present invention are substantially improved by the addition of small quantities of diorganopolysiloxane while their dimensional stability under heat and their rigidity are largely preserved.

    摘要翻译： 一种均匀的热塑性混合物，其包含（A）85-99.5重量％的全同立构聚丙烯; 和（B）15至0.5重量％的在20℃下粘度为30,000至80,000cSt的液体饱和二有机聚硅氧烷。由本发明的聚丙烯/二有机聚硅氧烷混合物制备的模制品的弹性性质基本上 通过添加少量的二有机聚硅氧烷来改善，同时它们在加热下的尺寸稳定性和它们的刚性被大大保持。