GRAFT COPOLYMER
    7.
    发明申请
    GRAFT COPOLYMER 审中-公开
    GRAFT共聚物

    公开(公告)号:US20100093575A1

    公开(公告)日:2010-04-15

    申请号:US12527284

    申请日:2008-02-18

    申请人: Patric Meessen

    发明人: Patric Meessen

    IPC分类号: C08F255/04 C10M107/22

    摘要: The invention relates to a graft copolymer comprising the reaction product of maleic anhydride and a backbone polymer wherein said graft copolymer comprises between 0.50 and 5.0 weight percent of maleic anhydride, wherein said backbone polymer is selected from the group consisting of poly-olefins and copolymers of ethylene and α-olefins with 3 to 8 carbon atoms, the graft copolymer has a MFI of more than 50 dg/min (@190° C., 2.16 kg), and more than 25% of the graft copolymer chains have a chain-end unsaturation. These graft copolymers are suitable as processing aids in e.g. extrusion of high molecular weight polymers. The invention relater also to a method for grafting maleic anhydride to polymers, comprising the steps of: melting an ethylene polymer by heating and down-shearing the polymer in a co- rotating, twin-screw extruder while injecting maleic anhydride and a free radical initiator into a polymer filled, pressurized section of the extruder; and mixing the polymer and the maleic anhydride in the extruder for sufficient time to graft the maleic anhydride wherein the free radical initiator is an organic peroxide that has a half-life (t1/2) of more than 1 second if measured in mono-chlorobenzene at 240° C.

    摘要翻译: 本发明涉及包含马来酸酐和主链聚合物的反应产物的接枝共聚物,其中所述接枝共聚物包含0.50-5.0重量%的马来酸酐,其中所述主链聚合物选自聚烯烃和共聚物 乙烯和具有3至8个碳原子的α-烯烃,接枝共聚物的MFI大于50dg / min(@ 190℃,2.16kg),超过25%的接枝共聚物链具有链 - 末端不饱和度。 这些接枝共聚物适合用作例如加工助剂。 挤出高分子量聚合物。 本发明还涉及将马来酸酐接枝到聚合物上的方法,包括以下步骤:通过在共旋转的双螺杆挤出机中加热和下剪切聚合物来熔融乙烯聚合物,同时注入马来酸酐和自由基引发剂 进入挤出机的聚合物填充加压部分; 并在挤出机中混合聚合物和马来酐足够的时间以接枝马来酸酐,其中如果在单氯苯中测量,其自由基引发剂是半衰期(t1 / 2)大于1秒的有机过氧化物 在240℃

    Lubricating oil for compression-type refrigerators
    8.
    发明授权
    Lubricating oil for compression-type refrigerators 失效
    用于压缩式冰箱的润滑油

    公开(公告)号:US5908818A

    公开(公告)日:1999-06-01

    申请号:US648059

    申请日:1996-05-17

    摘要: There is disclosed a lubricating oil for compression-type refrigerators comprising a polyvinyl ether compound which contains a constituting unit represented by the general formula (I), a polyvinyl ether compound which contains constituting units represented by each one of the general formulae (I) and (II), or a mixture of these polyvinyl ether compounds, as the main component thereof. Ratio by mol of carbon to oxygen in the above polyvinyl ether compounds is 4.2 to 7.0. Also disclosed is a lubricating oil for compression-type refrigerators comprising a polyvinyl ether compound containing constituting units which are both represented by the general formula (I) but between which R.sup.5 is different. The lubricating oil for compression-type refrigerators has excellent compatibility with hydrofluorocarbons, such as 1,1,1,2-tetrafluoroethane, and hydrochlorofluorocarbons which can be used as the refrigerant to replace compounds causing environmental pollution such as dichlorodifluoromethane, shows low hygroscopicity, and exhibits superior stability and lubricating property. ##STR1##

    摘要翻译: PCT No.PCT / JP94 / 02011 Sec。 371日期1996年5月17日 102(e)日期1996年5月17日PCT 1994年11月30日PCT PCT。 WO95 / 15367 PCT出版物 日期:1995年6月8日公开了一种压缩型冰箱用润滑油,其包含含有由通式(I)表示的构成单元的聚乙烯基醚化合物,含有由通式(I)表示的构成单元 式(I)和(II),或这些聚乙烯基醚化合物的混合物作为其主要成分。 上述聚乙烯醚化合物中的碳与氧的摩尔比为4.2〜7.0。 还公开了一种用于压缩式冰箱的润滑油,其包含含有由通式(I)表示但R5不同的构成单元的聚乙烯基醚化合物。 用于压缩式冰箱的润滑油与氢氟烃如1,1,1,2-四氟乙烷和可用作制冷剂替代引起环境污染的化合物如二氯二氟甲烷的氢氯氟烃具有优异的相容性,显示出低吸湿性,和 表现出优异的稳定性和润滑性。