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    • 2. 发明申请
    • COMPOSITION COMPRISING ALKOXY GROUP CONTAINING POLYMERS, AN ALOXYSILYL GROUP CONTAINING REACTANT AND A TRANSESTERIFICATION CATALYST. SEALANT AND ADHESIVE MADE BY TRANSESTERIFICATION PROCESS
    • 包含含烷氧基的聚合物的组合物,含有反应物和转移催化剂的烷氧基。 通过过滤方法制造的密封胶和粘合剂
    • WO2011072056A3
    • 2011-07-28
    • PCT/US2010059536
    • 2010-12-08
    • DOW CORNING COPORATIONLOWER LORENLUEDER TIMOTHY B
    • LOWER LORENLUEDER TIMOTHY B
    • C08L101/10C08G18/22C08K5/00C09J201/10C09K3/10
    • C09K3/10C08G18/4825C08G18/718C08K5/0025C09J175/08C09K3/1018C09K2200/0617C09K2200/0625C09K2200/065C09K2200/0657C08L101/10
    • A method for modifying cure speed of a condensation reaction curable involves converting the higher alkoxy groups on ingredient (A) to lower alkoxy groups (such as methoxy groups) using ingredients (B) and (C). Ingredient (A) is a substrate (polymer) having an average, per molecule, of at least two higher alkoxy group functionalized silyl end-blocking groups. Ingredient (B) is a reactant having lower alkoxy groups bonded to silicon. Ingredient (C) is a transesterification catalyst. It is thought that the higher alkoxy groups on ingredient (A) cure too slowly to be practical for many moisture curable sealants and adhesives. As used herein, the term higher alkoxy group means an alkoxy group having more carbon atoms than the lower alkoxy group on ingredient (B). By exchanging some or all of the higher alkoxy groups on ingredient (A) with lower alkoxy groups from ingredient (B), it is thought that cure speed of a sealant or adhesive composition can be increased. Furthermore, it may be possible to control cure speed of the composition by varying the amount of lower alkoxy groups present. And, it may be possible to control physical properties, such as modulus, by varying the amounts of ingredients (A) and (B) relative to each other.
    • 改性缩合反应固化速度的方法包括使用成分(B)和(C)将成分(A)中的高级烷氧基转化为低级烷氧基(如甲氧基)。 成分(A)是每分子平均至少两个高级烷氧基官能化甲硅烷基封端基团的底物(聚合物)。 成分(B)是具有与硅结合的低级烷氧基的反应物。 成分(C)是酯交换催化剂。 据认为,成分(A)上的高级烷氧基固化太慢,对许多可湿固化的密封剂和粘合剂而言是不实用的。 如本文所用,术语高级烷氧基是指具有比成分(B)上的低级烷氧基更多的碳原子的烷氧基。 通过从成分(B)交换成分(A)中的低级烷氧基的一些或全部高级烷氧基,认为可以提高密封剂或粘合剂组合物的固化速度。 此外,可以通过改变存在的低级烷氧基的量来控制组合物的固化速度。 并且,可以通过改变成分(A)和(B)的量相对于彼此来控制物理性质,例如模量。