Ethylene(meth)acrylate copolymers with low residual content in comonomers
    12.
    发明授权
    Ethylene(meth)acrylate copolymers with low residual content in comonomers 有权
    共聚单体中残留含量低的(甲基)丙烯酸乙烯酯共聚物

    公开(公告)号:US06762254B1

    公开(公告)日:2004-07-13

    申请号:US09959800

    申请日:2001-11-07

    IPC分类号: C08F200

    摘要: Copolymers of ethylene have from 1 to 30 mol % of alkyl(meth)acrylates and, if desired, other comonomers, and have a residual comonomer content of less than 0.5% by weight in the copolymer. A process for preparing copolymers of this type in a combination of stirred autoclave and tubular reactor is described, as is the use of the copolymers for preparing polyamide molding compositions.

    摘要翻译: 乙烯的共聚物具有1至30摩尔%的(甲基)丙烯酸烷基酯,如果需要,其它共聚单体的共聚物的残留共聚单体含量小于0.5重量%。 描述了在搅拌的高压釜和管式反应器的组合中制备这种类型的共聚物的方法,以及用于制备聚酰胺模塑组合物的共聚物的用途。

    Preparation of oxidized polyolefin waxes
    19.
    发明授权
    Preparation of oxidized polyolefin waxes 失效
    氧化聚烯烃蜡的制备

    公开(公告)号:US06169148A

    公开(公告)日:2001-01-02

    申请号:US09004340

    申请日:1998-01-08

    IPC分类号: C08F806

    摘要: A process for preparing oxidized polyolefin waxes by reacting polyolefin waxes with oxygen or oxygen-containing gases at from 140 to 200° C. and at pressures of from 5 to 200 bar involves conducting the oxidation reaction continuously in a tube reactor but excludes the reaction of polyolefins prepared by metallocene catalysis.

    摘要翻译: 通过使聚烯烃蜡与氧或含氧气体在140至200℃和5至200巴的压力下反应制备氧化聚烯烃蜡的方法包括在管式反应器中连续进行氧化反应,但不包括 通过茂金属催化制备的聚烯烃。

    Process for the preparation of ethylene/(meth)acrylic acid copolymers
    20.
    发明授权
    Process for the preparation of ethylene/(meth)acrylic acid copolymers 失效
    制备乙烯/(甲基)丙烯酸共聚物的方法

    公开(公告)号:US5880233A

    公开(公告)日:1999-03-09

    申请号:US957321

    申请日:1997-11-06

    IPC分类号: C08F2/00 C08F4/38 C08F210/02

    CPC分类号: C08F210/02

    摘要: Copolymers of ethylene with .alpha.,.beta.-unsaturated carboxylic acids are prepared at from 50.degree. to 250.degree. C. and from 500 to 5000 bar in a stirred autoclave having a length/diameter ratio greater than 5:1 by a process in which the monomer mixtures are fed into the autoclave in at least two part-streams, the first part-stream being passed into the autoclave at the beginning of the autoclave pipe and the second part-stream being introduced at a position which is a distance away from the beginning which corresponds to 25-50% of the total length and the amount of the .alpha.,.beta.-unsaturated carboxylic acids in the first part-stream is from 20 to 90% less than the average amount in the further part-streams and a peroxide polymerization initiator having a lower decomposition temperature, or a mixture of peroxide polymerization initiators having a lower average decomposition temperature, than that of the initiators in the further part-streams is passed in with the first part-stream.

    摘要翻译: 乙烯与α,β-不饱和羧酸的共聚物在50至250℃和500至5000巴的条件下通过一种方法制备,所述搅拌高压釜的长度/直径比大于5:1,其中单体 将混合物以至少两部分流进料到高​​压釜中,第一部分物流在高压釜管道的开始处被送入高压釜中,并且将第二部分物流引入远离开始位置的位置 其对应于总长度的25-50%,并且第一部分流中的α,β-不饱和羧酸的量比另外的部分流中的平均量少20至90%,并且过氧化物聚合 具有较低分解温度的引发剂或具有较低平均分解温度的过氧化物聚合引发剂的混合物比其它部分流中的引发剂的引发剂与第一部分流一起进入。