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    • 19. 发明授权
    • Method of making silicone-organic block copolymers
    • 硅酮有机嵌段共聚物的制备方法
    • US5789516A
    • 1998-08-04
    • US826716
    • 1997-04-07
    • Daniel GraiverAaron Quoc KhieuBinh Thanh Nguyen
    • Daniel GraiverAaron Quoc KhieuBinh Thanh Nguyen
    • C08L83/10C08F4/40C08F4/44C08F293/00C08G77/442C08G77/06
    • C08G77/442C08F4/40
    • A method of manufacturing block copolymers containing a polyorganosiloxane segment, by dual polymerization involving (i) polycondensation of a silicone block followed by (ii) the free radical polymerization of a monomer that can be polymerized by free radical polymerization, such as a vinyl containing organic monomer. Initiation of free radical polymerization in step (ii) is carried out with a carbonyl functional group attached to the silicone polymer block. The carbonyl functional silicone polymer, preferably an aldehyde functional silicone polymer, is included as one component of a copper-based Redox initiating system. The method ensures no free homopolymerization, complete reactivity, and various polymer architectures are possible, including for example, polymeric structures such as AB, ABA, (AB).sub.n, brush, and radiant types. The method is fast, effective, convenient, and easier to control than typical ionic polymerization techniques. The silicone-organic block copolymers obtained by the process have utility as polymeric surfactants or as solubility modifiers.
    • 通过双重聚合制造含有聚有机硅氧烷链段的嵌段共聚物的方法,包括(i)硅氧烷嵌段的缩聚,随后(ii)可通过自由基聚合反应的单体的自由基聚合,例如含乙烯基的有机物 单体。 在步骤(ii)中开始自由基聚合是用与硅氧烷聚合物嵌段连接的羰基官能团进行的。 羰基官能硅氧烷聚合物,优选醛官能的硅氧烷聚合物,作为铜基氧化还原引发体系的一个组分被包括在内。 该方法确保没有游离的均聚,完全的反应性,并且各种聚合物结构是可能的,包括例如聚合物结构如AB,ABA,(AB)n,刷和辐射型。 该方法比典型的离子聚合技术快速,有效,方便,易于控制。 通过该方法获得的硅氧烷 - 有机嵌段共聚物可用作聚合物表面活性剂或溶解度调节剂。