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    • 4. 发明申请
    • PROCESS FOR THE CONDENSATION OF COMPOUNDS HAVING SILICON BONDED HYDROXY OR ALKOXY GROUPS
    • 具有硅键合羟基或烷氧基的化合物的浓缩方法
    • WO2002081551A1
    • 2002-10-17
    • PCT/EP2002/004196
    • 2002-03-22
    • DOW CORNING CORPORATIONLEADLEY, Stuart, RobertTAYLOR, Richard, GregoryHABIMANA, Jean de la Croi
    • LEADLEY, Stuart, RobertTAYLOR, Richard, GregoryHABIMANA, Jean de la Croi
    • C08G77/08
    • C08G77/08
    • The specification describes preparation of materials comprising weakly co-ordinating anions and processes using them as catalysts for condensation reaction of compounds having silicon-bonded hydroxy or alkoxy groups. Anions are mentioned which incorporate one or more atoms of an element selected from aluminium, niobium and boron. Preferred compounds comprise borates incorporating quadri-substituted boron in which the substituents include highly halogenated hydrocarbon groups for example pentafluorinated phenyl groups or bis(trifluromethyl) phenyl groups. Preferred anions are {B(C 6 F 5 ) 4 } - and {B(C 6 (CF 3 ) 2 H 3 ) 4 } - . The specification describes condensation in presence of these materials of compounds having at least one unit according to the general formula R° a R 1 b R 2 c SiO (4-(a+b+c)/2 in which each R° is the same or different and represents a hydroxy, alkoxy, alkoxyalkoxy or hydrocarbonoxy group having up to 10 carbon atoms each R 1 is the same or different and represents hydrogen or a monovalent substituted or unsubstituted hydrocarbon group, each R 2 is the same or different and represents a divalent substituted or unsubstituted alkylene or oxyalkylene group, a has a value of 1, 2, 3, or 4, b has a value of 0, 1, 2 or 3 and c has a value of 0, 1, 2 or 3.
    • 该说明书描述了包含弱配位阴离子和方法的材料的制备,使用它们作为具有硅键合的羟基或烷氧基的化合物的缩合反应的催化剂。 提及了含有一个或多个选自铝,铌和硼的元素的一个或多个原子的阴离子。 优选的化合物包括掺入四取代硼的硼酸盐,其中取代基包括高卤化烃基,例如五氟苯基或双(三氟甲基)苯基。 优选的阴离子是{B(C 6 F 5)4} - 和{B(C 6(CF 3)2 H 3)4} - 。 本说明书描述了在这些具有至少一个单元的化合物存在下,根据通式R a a R b R 2 cSiO(4-(a + b + c)/ 2)的化合物中的缩合,其中每个R' 相同或不同,表示具有多至10个碳原子的羟基,烷氧基,烷氧基烷氧基或烃氧基,每个R 1相同或不同,表示氢或一价取代或未取代的烃基,每个R 2为 相同或不同,表示二价取代或未取代的亚烷基或氧化烯基,a a值为1,2,3或4,b <0的值为0, 1,2或3和c i具有0,1,2或3的值。