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US 5,101,055 AGranted
Process for preparation of bis- and tris(silylorgano)amines
AssigneeDow Corning Corporation
InventorsPaul C. Dinh, Peter Y. K. Lo
Life of this patent
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Abstract
The present invention is a process specific for the preparation of bis- and tris- amines by the contact of silylorganoamines in the presence of palladium monoxide catalyst. The process results in near quantitative conversion of the silylorganoamines to the desired bis- and tris-amines, without the need for elevated pressures and without formation of salts of ammonia and chloride.
Claims13
A process for the preparation of silylorganoamines, the process comprising:
- (A) contacting silylorganoamines of formula
- {R.sup.2.sub.a (R.sup.1 O).sub.3-a SiR.sup.3 }.sub.n NH.sub.3-n
- with particulate palladium monoxide, at a temperature within a range of about 50.degree. C. to 300.degree. C., and
- (B) isolating product silylorganoamines of formula
- {R.sup.2.sub.a (R.sup.1 O).sub.3-a SiR.sup.3 }.sub.y NH.sub.3-y
- where each R.sup.1 is independently selected from a group consisting of alkyl, aryl, aralkyl, and cycloalkyl radicals of less than 20 carbon atoms;
- each R.sup.2 is independently selected from a group consisting of R.sup.1, alkenyl radicals of less than 20 carbon atoms, fluoride substituted alkyl radicals of less than 20 carbon atoms, and hydrogen;
- R.sup.3 is selected from a group consisting of divalent hydrocarbon radicals of less than 20 carbon atoms and divalent polyethers of less than 20 carbon atoms;
- a=0, 1, 2or 3;
- n=1 or 2;
- and y=n+1.
8 more elements
A process for the preparation of silylorganoamines, the process comprising:
- contacting aminopropyltrimethoxysilane with particulate palladium black, at a temperature within a range of about 180.degree. C. to 250.degree. C., for about 15 to 60 minutes, in a stirred batch process reactor;
- and obtaining product silylorganoamines selected from the group consisting of bis(trimethoxysilylpropyl)amine and tris(trimethoxysilylpropyl)amine.
A process for the preparation of silylorganoamines, the process comprising:
- contacting aminopropyltriethoxysilane with particulate palladium black, at a temperature within a range of about 180.degree. C. to 250.degree. C., for about 15 to 60 minutes, in a stirred batch process reactor;
- and obtaining product silylorganoamines selected from the group consisting of bis(triethoxysilylpropyl)amine and tris(triethoxysilyl-propyl)amine.
Dependencies are inferred from the claim text.