Hydrophilic swellable graft polymers from maleic anhydride-alkylene
substrate
    55.
    发明授权
    Hydrophilic swellable graft polymers from maleic anhydride-alkylene substrate 失效
    来自马来酸酐 - 亚烷基底物的亲水性可溶胀接枝聚合物

    公开(公告)号:US4931497A

    公开(公告)日:1990-06-05

    申请号:US264022

    申请日:1988-10-28

    CPC分类号: C08F283/06 A61L15/60

    摘要: The present invention relates to hydrophilic swellable graft polymers which consist, in random distribution, to the extent of 0.5 to 20% by weight of radicals of the general formula I ##STR1## 79 to 99% by weight of radicals containing an acid group, of the general formula II ##STR2## and 0.1 to 2% by weight of crosslinking structures originating from monomers with at least two olefinically unsaturated double bonds, wherein the radicals R.sup.1 to R.sup.4 and n have the meanings given in claim 1, these graft polymers being used as absorbants for water and aqueous solutions.

    摘要翻译: 亲水性可膨胀的接枝聚合物本发明涉及亲水性可溶胀的接枝聚合物,其按随机分布的方式组合,其含量为0.5-20%(重量)的通式Ⅰ(I)的基团为79-99%(重量) 基团,具有通式II(II)的基团和0.1至2重量%的源自具有至少两个烯属不饱和双键的单体的交联结构,其中基团R 1至R 4和n具有权利要求1中给出的含义 ,这些接枝聚合物被用作水和水溶液的吸收剂。

    Cement slurries for deep holes, with a copolymer content for reducing
the water loss
    56.
    发明授权
    Cement slurries for deep holes, with a copolymer content for reducing the water loss 失效
    用于深孔的水泥浆料,具有减少水分流失的共聚物含量

    公开(公告)号:US4587283A

    公开(公告)日:1986-05-06

    申请号:US719023

    申请日:1985-04-03

    CPC分类号: C09K8/487 C04B24/163 C09K8/46

    摘要: Cement slurries for deep holes, with a content of copolymers which are composed of 5-95% by weight of groups of the formula ##STR1## in which R.sub.1 is hydrogen or methyl,R.sub.2 is C.sub.2 -C.sub.10 -alkylene andMe is ammonium, lithium, sodium or potassium, of 5-60% by weight of groups of the formula ##STR2## in which R.sub.3 is hydrogen, --CH.sub.3 or C.sub.2 H.sub.5 andR.sub.4 is --CH.sub.3 or C.sub.2 H.sub.5, orR.sub.3 and R.sub.4 together are a propylene group which, with incorporation of the radical ##STR3## forms a pyrrolidone radical, and of 0-90% by weight of groups of the formula ##STR4## in which R.sub.6 is hydrogen or methyl andR.sub.7 is carboxamido, carboxyl, cyano or carbomethoxy.These copolymers reduce the water loss of cement slurries which are required for deep holes.

    摘要翻译: 用于深孔的水泥浆料,其共聚物含量由5-95重量%的式(IMAGE)基团组成,其中R1是氢或甲基,R2是C2-C10-亚烷基,Me是铵,锂 ,其中R 3是氢,-CH 3或C 2 H 5,且R 4是-CH 3或C 2 H 5,或者R 3和R 4一起是丙烯基的式(III)的基团的5-60% 其中通过引入基团形成吡咯烷酮基团和0-90%重量的式(IV)的基团,其中R 6是氢或甲基,R 7是甲酰氨基,羧基,氰基或 甲酯基。 这些共聚物降低了深孔所需的水泥浆的水分损失。