IMPROVEMENTS IN A METHOD OF PREPARING AMINOISOALKOXYALKYLSILANES

摘要

1281352 Aminoisoalkoxyalkylsilanes and siloxanes GENERAL ELECTRIC CO 16 July 1969 [17 July 1968] 35865/69 Headings C3S and C3T [Also in Division C2] Novel aminoisoalkoxyalkylsilanes of the formula wherein R denotes a monovalent organic radical (e.g. a hydrocarbon radical), R1 denotes hydrogen or a monovalent organic radical (e.g. a hydrocarbon radical), with the proviso that two R1 radicals attached to a single carbon atom may form with it a C 5-7 cycloalkyl radical, R11 denotes C 1-8 alkyl, with the proviso that R11 may also denote hydrogen when at least one of the R1 radicals on the aminopropoxy skeleton denotes a monovalent organic radical, a is 0, 1, 2 or 3 and b is 1, 2, 3 or 4, are prepared by reacting an unsaturated nitrile of the formula with an unsaturated alcohol of the formula in the presence of an ammonium hydroxide type ion exchange resin catalyst of the formula. (wherein x has a value of from 1000 to 1,000,000 and y has a value of from 2000 to 2,000,000) to form a compound of the formula which is subsequently reacted in the presence:of a platinum compound catalyst with a silane of the formula R 3-a X a SiH to produce a compound of the formula which may then be hydrogenated to the required product. Compounds in which X represents a halogen atom may be converted to corresponding alkoxy derivatives prior or subsequent to the hydrogenation step. The hydrolysable radical X is preferably an alkoxy, aryloxy, dialkylamino or dialkylaminoxy radical. The above novel silanes may also be converted to corresponding novel organopolysiloxane copolymers, and these in turn may be. combined with aluminium silicate and an emulsifying agent in an aqueous medium to provide novel emulsion compositions. Exemplified novel silanes are 3-(2-methyl-3-aminopropoxy) propyltrimethoxysilane, 3-(1-methyl-3-aminopropoxy) propyltrimethoxysilane, 3-(2-methyl-3-aminopropoxy)-2-methylpropyl-trimethoxysilane, 3- (2 - methyl - 3 - aminopropoxy) - propyltriethoxysilane, 3-(2-ethyl-3-aminopropoxy)-propyltrimethoxysilane and 4-(2-methyl-3-aminoproproxy)butyltrimethoxysilane. 3-(2-Methyl-2- cyanoethoxy)- and 3-(1-methyl-2-cyanoethoxy)- propyltrimethoxysilanes are prepared as intermediates. In examples organopolysiloxane copolymers are prepared by reacting 3-(1- or 2- methyl-3-aminopropoxy) propyltrimethoxysilane with a silanol chain-stopped polydimethylsiloxane of the formula HO-[-Si(CH 3 ) 2 -O-] 5 -H; 3-aminopropyltrimethoxysilane and water, these copolymers are then converted to partial salts with acetic acid and mixed with methyl silicone oil having a viscosity of 10,000 c.s. at 25‹C., sorbitan monooleate and polyoxyethylene sorbitan monooleate emulsifiers, mineral spirits, kerosene, water and aluminium silicate to provide cleaner-polish emulsions. Uses.-As ingredients of automobile polishes.