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    • 5. 发明授权
    • Thickening silicones with elastomeric silicone polyethers
    • 用弹性硅氧烷聚醚增稠硅酮
    • US5811487A
    • 1998-09-22
    • US768064
    • 1996-12-16
    • William James Schulz, Jr.Shizhong Zhang
    • William James Schulz, Jr.Shizhong Zhang
    • A61K8/00A61K8/89A61K8/891A61Q5/00C08G77/12C08G77/46C08G77/50C08K5/01C08L83/05C08L83/12C08J83/02C08F283/00C08G77/06
    • A61K8/895A61Q19/00C08G77/46C08G77/50C08K5/01C08L83/12
    • Low molecular weight siloxane fluids are thickened by silicone elastomers. The silicone elastomers are made by crosslinking reactions of .tbd.Si--H containing siloxanes and an unsaturated hydrocarbon such as an alpha, omega-diene, in the presence of a low molecular weight siloxane fluid. The .tbd.SiH siloxane is first partially reacted with a mono-alkenyl functionalized polyether. It is then crosslinked by the alpha, omega-diene, in the presence of the low molecular weight siloxane fluid. An elastomer, i.e. gel, with polyether groups is produced. The elastomer can be swollen with the low molecular weight siloxane fluid under shear force, to provide a uniform silicone paste. The silicone paste has excellent spreadability upon rubbing, and possesses unique rheological properties in being thixotropic and shear thinning. The silicone paste can be easily emulsified with water to form a stable uniform emulsion, without using a surfactant to allow normally immiscible materials to become intimately mixed.
    • 低分子硅氧烷流体由硅氧烷弹性体增稠。 硅氧烷弹性体是通过在低分子量硅氧烷流体存在下,通过含有SiTHH的硅氧烷和不饱和烃如α,ω-二烯的交联反应来制备的。 3BOND SiH硅氧烷首先与单烯基官能化聚醚部分反应。 然后在低分子量硅氧烷流体的存在下,通过α,ω-二烯交联。 制备具有聚醚基团的弹性体,即凝胶。 弹性体可以在剪切力下用低分子量硅氧烷流体溶胀,以提供均匀的硅胶。 硅胶糊在摩擦时具有优异的铺展性,并且在触变和剪切变稀中具有独特的流变性能。 硅胶糊可以容易地用水乳化以形成稳定的均匀乳液,而不使用表面活性剂以允许通常不混溶的材料变得紧密混合。