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    • 1. 发明授权
    • Process for the preparation of stable water-in-oil emulsions of
hydrolyzed polymers of N-vinyl amides and the use thereof
    • N-乙烯基酰胺的水解聚合物的稳定的油包水乳液的制备方法及其用途
    • US5739190A
    • 1998-04-14
    • US737589
    • 1996-11-21
    • Heinrich HartmannKarl-Heinrich SchneiderWalter DenzingerClaudia NilzDietmar Monch
    • Heinrich HartmannKarl-Heinrich SchneiderWalter DenzingerClaudia NilzDietmar Monch
    • B01F17/52B01J13/00C02F1/56C04B24/26C08F2/32C08F8/12C08F26/02C08F126/02C08L39/02C09K8/32D21H17/34D21H21/10C08K5/10
    • D21H21/10C02F1/56C04B24/2652C08F2/32C08F26/02C08F8/12C09K8/32Y02W10/37
    • A process for the preparation of a stable water-in-oil emulsion of a hydrolyzed polymer of an N-vinyl amide of the formula ##STR1## in which R and R.sup.1 denote H or C.sub.1 -C.sub.6 alkyl, by the polymerization of a compound of the formula I alone or in admixture with another ethylenically unsaturated monomer in the presence of a polymerization initiator and emulsifier in the form of a water-in-oil emulsion, to form a water-in-oil polymeric emulsion, followed by hydrolysis of the polymer in the form of the water-in-oil polymeric emulsion in the presence of an acid or base and from 1 to 30 wt %, based on the polymer, of an emulsifier, the emulsifier used being a mixture of (a) from 5 to 95 wt % of a block or graft copolymer of the structure (A-B)m, (A)-B or (B)-A, in which in each case (a) from 5 to 95 wt % of a block or graft copolymer of the structure (A-B).sub.m, (A).sub.n B or (B).sub.n A, in which in each case A is a hydrophobic homopolymer or copolymer having a degree of polymerization of at least 3, B is a hydrophilic homopolymer or copolymer having a degree of polymerization of at least 3, m is equal to or greater than 1, and n is equal to or greater than 2, and (b) from 5 to 95 wt % of another water-in-oil emulsifier having a molar mass below 1000 g/mol.
    • PCT No.PCT / EP95 / 01818 Sec。 371日期:1996年11月21日 102(e)日期1996年11月21日PCT提交1995年5月13日PCT公布。 公开号WO95 / 32227 PCT 日期:1995年11月30日制备式(I)的N-乙烯基酰胺的水解聚合物的稳定的油包水乳液的方法,其中R和R 1表示H或C 1 -C 6烷基 通过在聚合引发剂和油包水乳液形式的乳化剂的存在下单独或与另一种烯属不饱和单体的混合物聚合式I化合物,以形成油包水聚合物 乳液,然后在酸或碱的存在下以油包水型聚合物乳液的形式水解聚合物,并且基于聚合物为1至30重量%的乳化剂,所使用的乳化剂为 (a)5至95重量%的结构(AB)m,(A)-B或(B)-A的嵌段或接枝共聚物的混合物,其中在每种情况下(a)5至95重量% 结构(AB)m,(A)nB或(B)nA的嵌段或接枝共聚物的%,其中在每种情况下A是具有聚合度的疏水性均聚物或共聚物 至少3,B是具有至少3,m等于或大于1,n等于或大于2的聚合度的亲水均聚物或共聚物,和(b)5至95重量% 的另一种油包水乳化剂,其摩尔质量低于1000g / mol。