公开(公告)号：EP0860460A2

公开(公告)日：1998-08-26

申请号：EP98301264.2

申请日：1998-02-20

申请人： DOW CORNING LIMITED

发明人： Bischoff, Remy ,  Taylor, Richard

IPC分类号： C08G77/08

CPC分类号： C08G77/08

摘要： A process for making a dispersion of a high viscosity siloxane in a volatile cyclosiloxane comprises the step of effecting ring-opening polymerisation of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred. Preferably the polymerisation reaction is stopped by adding carbon dioxide or an acid.

摘要翻译： 在挥发性环状硅氧烷中制备高粘度硅氧烷的分散体的方法包括在磷酸根碱催化下进行挥发性环状硅氧烷的开环聚合的步骤，以及在开环完成之前停止聚合反应的步骤 发生环硅氧烷的聚合。 优选地，通过加入二氧化碳或酸来停止聚合反应。

公开(公告)号：EP0860460A3

公开(公告)日：1999-01-20

申请号：EP98301264.2

申请日：1998-02-20

申请人： DOW CORNING LIMITED

发明人： Bischoff, Remy ,  Taylor, Richard

IPC分类号： C08G77/08

CPC分类号： C08G77/08

摘要： A process for making a dispersion of a high viscosity siloxane in a volatile cyclosiloxane comprises the step of effecting ring-opening polymerisation of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred. Preferably the polymerisation reaction is stopped by adding carbon dioxide or an acid.

公开(公告)号：EP0860460B1

公开(公告)日：2005-06-01

申请号：EP98301264.2

申请日：1998-02-20

申请人： DOW CORNING LIMITED

发明人： Bischoff, Remy ,  Taylor, Richard

IPC分类号： C08G77/08 ,  C08G77/10 ,  C08J3/09

CPC分类号： C08G77/08

公开(公告)号：EP0860461B1

公开(公告)日：2004-08-04

申请号：EP98301265.9

申请日：1998-02-20

申请人： DOW CORNING LIMITED

发明人： Bischoff, Remy ,  Currie, John ,  Herron, William ,  Taylor, Richard

IPC分类号： C08G77/08 ,  C08G77/10

CPC分类号： C08G77/08

公开(公告)号：EP0860461A3

公开(公告)日：1999-01-20

申请号：EP98301265.9

申请日：1998-02-20

申请人： DOW CORNING LIMITED

发明人： Bischoff, Remy ,  Currie, John ,  Herron, William ,  Taylor, Richard

IPC分类号： C08G77/08

CPC分类号： C08G77/08

摘要： A process for the ring-opening polymerisation of cyclosiloxanes, which comprises contacting a cyclosiloxane with 1 - 500ppm by weight of a phosphazene base, based on the weight of cyclosiloxane, in the presence of water, preferably 0.5 - 10 mols per mol of phosphazene base. Also claimed is a process in which the cycloxilosane is present together with an agent which inhibits catalyst activity of the phoshpazene base, e.g. carbon dioxide or water, and in which the polymerisation is initiated by reducing the effect of the inhibiting agent, e.g. by heating.

公开(公告)号：EP0860461A2

公开(公告)日：1998-08-26

申请号：EP98301265.9

申请日：1998-02-20

申请人： DOW CORNING LIMITED

发明人： Bischoff, Remy ,  Currie, John ,  Herron, William ,  Taylor, Richard

IPC分类号： C08G77/08

CPC分类号： C08G77/08

摘要： A process for the ring-opening polymerisation of cyclosiloxanes, which comprises contacting a cyclosiloxane with 1 - 500ppm by weight of a phosphazene base, based on the weight of cyclosiloxane, in the presence of water, preferably 0.5 - 10 mols per mol of phosphazene base. Also claimed is a process in which the cycloxilosane is present together with an agent which inhibits catalyst activity of the phoshpazene base, e.g. carbon dioxide or water, and in which the polymerisation is initiated by reducing the effect of the inhibiting agent, e.g. by heating.

摘要翻译： 一种环硅氧烷开环聚合的方法，其包括使环硅氧烷与1-500重量ppm磷腈碱（基于环硅氧烷的重量）在水的存在下接触，优选0.5-10摩尔/摩尔磷腈碱 。 还要求保护的是一种方法，其中环烷氧烷与抑制磷酰碱的催化剂活性的试剂一起存在。 二氧化碳或水，并且其中通过降低抑制剂的作用来引发聚合。 通过加热。