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    • 9. 发明授权
    • Process for the preparation of optionally alkoxylated polyorganosiloxane
resin by non-hydrolytic condensation
    • 通过非水解缩合制备任选烷氧基化聚有机硅氧烷树脂的方法
    • US5767216A
    • 1998-06-16
    • US594398
    • 1996-01-31
    • Jean-Marc FrancesHubert Pierre MutinLaurence BourgetDominique LeClercqAndre Vioux
    • Jean-Marc FrancesHubert Pierre MutinLaurence BourgetDominique LeClercqAndre Vioux
    • C08G77/06C08G77/08C08G77/18C08G77/22C08G77/48C08G77/60
    • C08G77/18C08G77/06C08G77/08
    • The present invention relates to the synthesis of optionally alkoxylated polyorganosiloxane (POS) resins by non-hydrolytic condensation. The object is to provide a process which offers the possibility of controlling the crosslinking. This object, inter alia, is achieved by the process according to the invention, which makes provision for carrying out a non-hydrolytic condensation reaction between alkoxysilyl units (Mo1) and halogenosilyl units (Mo2), both of which are carried by identical or different silanes, in the presence of a catalyst of the Lewis acid type, said condensation reaction generating essentially .tbd.Si--O--Si.tbd. linkages and coproducts XR (X=halogen). In this process, the target POS comprise siloxy units D, T and/or Q, or perhaps M, the catalyst is selected from metal compounds or mixtures thereof based on at least one metal belonging to group IIIB, IVB or VB of the periodic table, and the reaction temperature and the initial ratio OR/X are adjusted so that condensation takes place substantially exclusively between the units Mo1 and Mo2, with extreme minimization of secondary condensation between two alkoxy units OR to give the by-product R.sub.2 O.
    • 本发明涉及通过非水解缩合合成任选的烷氧基化聚有机硅氧烷(POS)树脂。 目的是提供一种提供控制交联的可能性的方法。 该目的尤其通过根据本发明的方法实现,其提供了在烷氧基甲硅烷基单元(Mo1)和卤代甲硅烷基单元(Mo2)之间进行非水解缩合反应,两者均由相同或不同的载体 硅烷,在路易斯酸型催化剂存在下,所述缩合反应产生基本上为3BOND Si-O-Si 3BOND键和副产物XR(X =卤素)。 在该方法中,目标POS包含基于至少一种属于元素周期表IIIB,IVB或VB族金属的金属化合物或其混合物的甲硅烷氧基单元D,T和/或Q,或者也许M ,并且调节反应温度和初始比例OR / X,使得冷凝仅在单元Mo1和Mo2之间发生,极端地最小化两个烷氧基单元之间的二次缩合或得到副产物R2O。