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    • 10. 发明公开
    • Process for manufacture of aqueous emulsions of silicone oils and resins
    • 硅油和树脂水性乳液的制造工艺
    • EP0245658A3
    • 1990-06-20
    • EP87105326.0
    • 1987-04-10
    • UNION CARBIDE CORPORATION
    • Reedy, James DaleCrane, William Clyde
    • C08G77/06
    • C08G77/06
    • This invention relates to a process for manufacturing a more stable and less shear sensitive aqueous emulsion of high molecular weight silicone oils and resins. Direct emulsification of high molecular weight silicone oil or resin is avoided by using a select group of reactive low molecular weight silicones, which may also contain silanes, and which reactants are polymerized in the emulsion with an appropriate surface active catalyst in a separate storage vessel, after rapid formation of a grease and dilution to the emulsion have been completed and after the emulsion has been transferred to the storage vessel. The rapid formation of the grease precursor and dilution to an emulsion and the removal of the resulting emulsion to a separate vessel for condensation polymerization allows this process to be practiced as a batch, continuous or semicontinuous process. The use of a condensation polymerization process also results in the elimination of unwanted cyclic by-products in the polymer of the oil or resin emulsion.
    • 本发明涉及制造高分子量硅油和树脂的更稳定和更少剪切敏感性的水性乳液的方法。 通过使用选择的一组反应性低分子量硅氧烷(其也可以含有硅烷)避免高分子量硅油或树脂的直接乳化,并且该反应物在乳液中与合适的表面活性催化剂在单独的储存容器中聚合, 快速形成润滑脂并稀释至乳液已经完成,并且乳液已经转移到储存容器中。 油脂前体的快速形成和稀释到乳液中并将所得乳液除去到用于缩聚的单独容器中,可以将该方法作为间歇,连续或半连续方法来实施。 使用缩聚方法也导致在油或树脂乳液的聚合物中消除不想要的环状副产物。