Preparation of copolymers which form clear aqueous solutions
    2.
    发明授权
    Preparation of copolymers which form clear aqueous solutions 失效
    形成清晰的水溶液的共聚物的制备

    公开(公告)号:US5122582A

    公开(公告)日:1992-06-16

    申请号:US586153

    申请日:1990-09-21

    CPC classification number: C08F226/10 C08F218/04 C08F6/003

    Abstract: The preparation of copolymers which form clear aqueous solutions fromA) 45 to 90% by weight N-vinylpyrrolidone,B) 10 to 55% by weight of a vinyl ester andC) 0 to 10% by weight of other copolymerizable monomersby radical polymerization in an organic solvent in the presence of a radical initiator, and removal of the organic solvent and other volatiles by distillation, entails allowing the polymerization to proceed until the N-vinylpyrrolidone content in the reaction mixture is from 5 to 1% by weight of the N-vinylpyrrolidone amount employed, substantially removing the organic solvent and other volatiles by distillation, adding water to the mixture, again adding a radical initiator and leaving the aqueous solution at from 50.degree. to 100.degree. C. for from 1 to 10 hours, and then removing volatile organic constituents virtually completely by a steam distillation.

    Abstract translation: 制备由A)45-90%(重量)N-乙烯基吡咯烷酮形成透明水溶液的共聚物,B)10-55%(重量)乙烯基酯和C)0-10%(重量)其它可共聚单体通过自由基聚合 在有机溶剂中,在自由基引发剂的存在下,通过蒸馏除去有机溶剂和其它挥发物,需要进行聚合,直到反应混合物中的N-乙烯基吡咯烷酮含量为重量的5〜1% 所用的N-乙烯基吡咯烷酮用量,通过蒸馏基本上除去有机溶剂和其它挥发物,向混合物中加入水,再加入自由基引发剂,并将水溶液在50至100℃下离心1至10小时; 然后通过蒸汽蒸馏实质上完全去除挥发性有机成分。

    Hair setting composition
    9.
    发明授权
    Hair setting composition 失效
    头发定型组成

    公开(公告)号:US5306484A

    公开(公告)日:1994-04-26

    申请号:US874203

    申请日:1992-04-27

    CPC classification number: A61K8/046 A61K8/8152 A61Q5/06

    Abstract: Hair setting composition containing as film formers copolymers based on tert-butyl acrylate and/or tert-butyl methacrylate, having a K value of from 10 to 50 and obtainable by free radical polymerization ofA) from 75 to 99% by weight of tert-butyl acrylate and/or tert-butyl methacrylate,B) from 1 to 25% by weight of acrylic acid and/or methacrylic acid andC) from 0 to 10% by weight of a further free radical copolymerizable monomer,the carboxyl groups of the copolymers having been partly or wholly neutralized by amines.

    Abstract translation: 含有作为成膜剂的基于丙烯酸叔丁酯和/或甲基丙烯酸叔丁酯的共聚物的固化组合物,其K值为10至50,可通过A)的75至99重量%的叔 - 丙烯酸丁酯和/或甲基丙烯酸叔丁酯,B)1至25重量%的丙烯酸和/或甲基丙烯酸,和C)0至10重量%的另外的自由基可共聚单体, 已经被胺部分或全部中和的共聚物。

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