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    • 5. 发明授权
    • Polysiloxane block copolymers in topical cosmetic and personal care compositions
    • 局部化妆品和个人护理组合物中的聚硅氧烷嵌段共聚物
    • US06365672B1
    • 2002-04-02
    • US09575966
    • 2000-05-23
    • Gerald AdamsEzat KhoshdelAnthony MorettaYvonne Christine PlantEuan Stuart Reid
    • Gerald AdamsEzat KhoshdelAnthony MorettaYvonne Christine PlantEuan Stuart Reid
    • C08L8310
    • A61K8/898A61Q5/00A61Q5/06C08G77/442
    • A process for making a polysiloxane block copolymer which is built up from units of the formula [A] [B], in which A is a polymeric block built up from radically polymerisable monomer, and B is a polysiloxane block, the process comprising the steps of polymerising a radically polymerisable monomer in the presence of an atom transfer radical initiator to form an polymer which is end-functionalized with a leaving group capable of nucleophilic substitution by nucleophilic end-groups on a polysiloxane, and reacting the polymer with a polysiloxane having nucleophilic end-groups so that a polysiloxane block copolymer is formed via a nucleophilic displacement reaction between the end-groups on the polysiloxane and leaving groups on the polymer respectively. Also provided is a cosmetic and personal care composition, such as a hair styling composition, comprising the polysiloxane block copolymer as described above.
    • 制备由式[A] [B]的单元构成的聚硅氧烷嵌段共聚物的方法,其中A是由可自由基聚合的单体构成的聚合物嵌段,B是聚硅氧烷嵌段,该方法包括步骤 在原子转移自由基引发剂的存在下聚合可自由基聚合的单体以形成聚合物,该聚合物用能够通过聚硅氧烷上的亲核端基进行亲核取代的离去基团进行末端官能化,并使聚合物与具有亲核性的聚硅氧烷反应 端基,从而通过聚硅氧烷上的端基和聚合物上的离去基团之间的亲核置换反应形成聚硅氧烷嵌段共聚物。 还提供了包含如上所述的聚硅氧烷嵌段共聚物的化妆品和个人护理组合物,例如头发定型组合物。