Ethylene polymers with &agr;-olefins
    42.
    发明授权
    Ethylene polymers with &agr;-olefins 失效
    乙烯聚合物与α-烯烃

    公开(公告)号:US06278032B1

    公开(公告)日:2001-08-21

    申请号:US09328881

    申请日:1999-06-09

    Applicant: Paolo Falchi

    Inventor: Paolo Falchi

    Abstract: Ethylene copolymers with octene and/or ethylene terpolymers with alpha-olefins from 3 to 12 carbon atoms, optionally in the presence of other comonomers containing more than one unsaturation, usable as additives to increase the gas oil properties at low temperatures, obtainable by polymerization of the monomers in the presence of catalysts comprising: a bis-cyclopentadienyl derivative having the general formula: (Cp1Cp2)—M—(L2L3) containing groups with oxygen bound to the transition metal, wherein M is a metal from the IIIb group to the Vb group or of the lanthanide series of the Element Periodic Table; Cp1 and Cp2, equal to or different from each other, represent cyclopentadienyls bound to M with delocalized &pgr; bonds.

    Abstract translation: 具有辛烯和/或乙烯三元共聚物的乙烯共聚物与3至12个碳原子的α-烯烃,任选在含有多于一个不饱和基团的其它共聚单体存在下,可用作增加低温下的瓦斯油性能的添加剂,可通过 催化剂存在下的单体,其包含:具有以下通式的双环戊二烯基衍生物:含有与过渡金属结合的氧的基团,其中M是从IIIb族基团至Vb基团的金属或元素周期的镧系元素 表; Cp1和Cp2彼此相同或不同,表示与离子化π键结合的M的环戊二烯基。

    Pour improvers for fuel oils
    47.
    发明授权
    Pour improvers for fuel oils 失效
    燃油改进

    公开(公告)号:US3679380A

    公开(公告)日:1972-07-25

    申请号:US3679380D

    申请日:1971-03-01

    Applicant: DU PONT

    CPC classification number: C10L1/1666

    Abstract: MIDDLE DISTILLATE FUEL OIL COMPOSITIONS CONTAINING AN EFFECTIVE AMOUNT OF A POUR IMPROVER CONSISTING OF A SOLUBLE, SUBSTANTIALLY LINEAR, ETHYLENE COPOLYMER CONSISTING OF, ON A WEIGHT BASIS, 58 TO 68% POLUMERIZED ETHYLENE UNITS, 32 TO 42% POLYMERIZED PROPYLENE UNITS, AND UP TO 10% POLYMERIZED 1,4-HEXADIENE UNITS, SAID COPOLYMER HAVING AN INHERENT VISCOSITY IN TETRACHLOROETHYLENE AT 30*C. OF ABOUT 0.1 TO 0.45, A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 1,000 TO 10,000 AND A MOLECULAR WEIGHT DISTRIBUTION OF LESS THAN ABOUT 8.

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