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    • 1. 发明授权
    • Process for preparing chain-extended organopolysiloxanes
    • 制备链延伸的有机聚硅氧烷的方法
    • US6040412A
    • 2000-03-21
    • US172508
    • 1998-10-14
    • Eric DammeJean-Marc GilsonPatrick LeempoelFabrice LebecqTakao Takemasa
    • Eric DammeJean-Marc GilsonPatrick LeempoelFabrice LebecqTakao Takemasa
    • C08G77/06C08G77/08C08G77/12C08G77/20C08G77/04
    • C08G77/06C08G77/08C08G77/12C08G77/20
    • This specification describes and claims a process for preparing chain-extended organopolysiloxanes. The process comprises the steps of: A) mixing organopolysiloxanes having at least one silicon-bonded hydroxyl group per molecule with a polymerization catalyst to form a mixture, B) allowing the mixture of step A to react so as to produce a reaction product comprising polymerized organopolysiloxanes of which some have at least one silicon-bonded hydroxyl group per molecule and C) allowing the silicon-bonded hydroxyl group containing organopolysiloxanes of the reaction product of step B to react with a nitrogen-containing silylating agent capable of chain-extending to produce a chain-extended organopolysiloxane. Preferably the silylating agent is a cyclosilazane. Organopolysiloxanes having terminal groups other than silicon-containing hydroxyl groups and which are capable of equilibrating with the mixture of step A and/or the reaction product of step B may also be introduced prior to step C. The chain-extended organopolysiloxanes are suitable for use in sealant compositions.
    • 本说明书描述并要求制备链延伸的有机聚硅氧烷的方法。 该方法包括以下步骤:A)将每分子具有至少一个与硅键合的羟基的有机聚硅氧烷与聚合催化剂混合以形成混合物,B)使步骤A的混合物反应以产生包含聚合的 有机聚硅氧烷,其一些每分子具有至少一个硅键合的羟基,和C)使步骤B的反应产物的与硅键合的含羟基的有机聚硅氧烷与能够扩链产生的含氮甲硅烷基化试剂反应 链延伸的有机聚硅氧烷。 优选地,甲硅烷基化剂是环硅氮烷。 可以在步骤C之前引入具有除含硅羟基以外的端基的能够与步骤A的混合物和/或步骤B的反应产物平衡的有机聚硅氧烷。扩链的有机聚硅氧烷适用于 在密封剂组合物中。
    • 3. 发明授权
    • Polymerization reactor and process
    • 聚合反应器和工艺
    • US06964753B2
    • 2005-11-15
    • US09912635
    • 2001-07-25
    • Jean Marc Gilson
    • Jean Marc Gilson
    • C08G85/00B01J14/00B01J19/00C08F2/01C08G77/06G05D16/00C08F2/00
    • B01J19/0033B01J14/00B01J2219/00033B01J2219/00094B01J2219/00162B01J2219/00164B01J2219/00168C08G77/06
    • A continuous static polymerization reactor unit for the production of liquid polymers, in particular high viscosity organopolysiloxanes, in a predetermined viscosity range comprises a reactor (1) a supply means (10,25) for supplying monomers and/or oligomers to an inlet means (2), and an outlet means (5). The inlet means (2) is adapted for the introduction of a reaction mixture into a reaction chamber (3), and a means for introducing at least one viscosity controlling agent into the supply means is provided to form a reaction mixture with monomers and/or oligomers (11,13,15,12,14,16). The unit is adapted to maintain the values of temperature and flow rate of the resulting reaction mixture/polymer in the reaction chamber (3) substantially constant. A control means (24) is used to detect any variation from a predetermined pressure drop value between the inlet means (2) and the outlet means (5), and should such a variation occur the control means (24) is also used to compute and control a compensating rate of introduction of one or more of the at least one viscosity controlling agents to cause the pressure drop between the inlet means (2) and the outlet means (5) to revert to the predetermined value. A process for making liquid polymers within a predetermined viscosity range is also disclosed.
    • 用于在预定粘度范围内生产液体聚合物,特别是高粘度有机聚硅氧烷的连续静态聚合反应器单元包括反应器(1)用于将单体和/或低聚物供应到入口装置的供应装置(10,25) 2)和出口装置(5)。 入口装置(2)适于将反应混合物引入反应室(3)中,并且提供用于将至少一种粘度控制剂引入供应装置的装置以与单体和/或 低聚物(11,13,15,12,14,16)。 该单元适于保持所得反应混合物/聚合物在反应室(3)中的温度和流速值基本上恒定。 控制装置(24)用于检测入口装置(2)和出口装置(5)之间的预定压降值的任何变化,并且如果出现这种变化,则控制装置(24)也用于计算 并且控制引入所述至少一种粘度控制剂中的一种或多种的引入装置(2)和所述出口装置(5)之间的压力降低到所述预定值的补偿率。 还公开了在预定粘度范围内制备液体聚合物的方法。