申请人:——
公开号:US04031119A1
公开(公告)日:1977-06-21
The invention relates to [perfluoroalkyl(alkoxy)phenyl]methyldichlorosilanes characterized by the general formula ##STR1## where: R.sub.F = OCF.sub.3 OC.sub.2 F.sub.5, OC.sub.2 F.sub.4 OCF.sub.3, C.sub.2 F.sub.4 OCF.sub.3, C.sub.3 F.sub.7 and also to a method of preparing them. The method according to the invention consists in that fluorobromo[alkyl(alkoxy)]benzenes having the general formula ##STR2## where: R.sub.F = OCF.sub.3 OC.sub.2 F.sub.5, OC.sub.2 F.sub.4 OCF.sub.3, C.sub.2 F.sub.4 OCF.sub.3, C.sub.3 F.sub.7 are treated with magnesium taken in a 5 - 20 per cent excess with respect to the stoichiometric quantity in a solution of absolute diethyl ether or absolute tetrahydrofurane at a temperature of 8.degree. - 60.degree. C. The resulting fluorine-containing magnesiumbromo[alkyl(alkoxy)]benzenes are treated with three-functional silanes -- methyltrichlorosilane -- taken in a 100 - 500 per cent excess with respect to the stoichiometric quantity, or with methylchlorodiethoxysilane, taken in the stoichiometric quantity or in a 50 per cent excess with respect to the stoichiometric quantity, at a temperature of 18.degree. - 60.degree. C. In the case of methylchlorodiethoxysilane, the resultant product is fluorine-containing [alkyl(alkoxy)phenyl]methyldiethoxysilanes which are treated with acetyl chloride taken in a 25 - 50 per cent excess with respect to the stoichiometric quantity, at a temperature of 40.degree. - 70.degree. C, in the presence of ferric chloride as a catalyst. The proposed [perfluoroalkyl(alkoxy)phenyl]methyldichlorosilanes can be used for preparing organofluosilicon lubricants, greases, sealing counds, rubber mixtures having high resistance to heat, frost, petrol and oils, that can be used in various fields of technology. The described method can be used to obtain the proposed end products in yields as high as 96 per cent of theory.
本发明涉及一种具有一般式的[全氟烷基(氧烷基)苯基]甲基二氯硅烷,其中:
##STR1##
其中,R.sub.F = OCF.sub.3,OC.sub.2 F.sub.5,OC.sub.2 F.sub.4 OCF.sub.3,C.sub.2 F.sub.4 OCF.sub.3,C.sub.3 F.sub.7,以及其制备方法。本发明的方法包括将具有一般式的氟溴[烷基(氧烷基)]苯乙烯,其中:
##STR2##
其中,R.sub.F = OCF.sub.3,OC.sub.2 F.sub.5,OC.sub.2 F.sub.4 OCF.sub.3,C.sub.2 F.sub.4 OCF.sub.3,C.sub.3 F.sub.7,用超量的镁(相对于化学计量数为5-20%)在绝对乙醚或四氢呋喃的溶液中处理,在8℃-60℃的温度下。将得到的含氟镁溴[烷基(氧烷基)]苯乙烯用三官能硅烷-三氯甲基硅烷-处理(相对于化学计量数为100-500%的超量),或用氯甲基二乙氧基硅烷,在化学计量数或超量50%的情况下,在18℃-60℃的温度下处理。在使用氯甲基二乙氧基硅烷的情况下,所得到的产物是含氟[烷基(氧烷基)苯基]甲基二乙氧基硅烷,该产物在存在铁三氯化物催化剂的情况下,在超量25-50%的乙酰氯的条件下,在40℃-70℃的温度下处理。所提出的[全氟烷基(氧烷基)苯基]甲基二氯硅烷可用于制备有机氟硅润滑剂、润滑脂、密封胶、具有高耐热性、耐冷性、耐汽油和油的橡胶混合物,可用于各种技术领域。所述方法可用于以高达理论产量96%的收率获得所提出的最终产物。