Method and intermediates for preparation of bis(aminoalkyl)polydiorganosiloxanes
AssigneeGeneral Electric Company
InventorsJimmy L. Webb, Hans V. Ritschard, James M. Lambert
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Abstract
Silicon-nitrogen compounds are prepared by the reaction of an olefinic amine such as allylamine with a polydiorganosiloxane such as 1,1,3,3-tetramethyldisiloxane, in the presence of a platinum-containing hydrosilation catalyst, preferably a specifically defined platinum complex of 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane. Depending on the reaction conditions, the product may be any of several compounds including bis(aminoalkyl)polydiorganosiloxanes and alkenylaminodisiloxanes which are spontaneously converted to cyclic disiloxazanes. The cyclic disiloxazanes may in turn be converted by hydrolysis to bis(aminoalkyl)octaorganotetrasiloxanes.
Claims29
A method for preparing a silicon-nitrogen which comprises effecting reaction between the components of a mixture comprising
- (A) at least one olefinic amine of the formula ##STR8## wherein each R.sup.1 is independently hydrogen, C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl, and
- (B) at least one polydiorganosiloxane of the formula ##STR9## wherein R.sup.2 is C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl and x has an average value from 1 to about 300, in the presence of a catalytic amount of
- (C) a platinum-containing hydrosilation catalyst;
- said mixture containing titratable acid, if any, in an amount up to 0.5 equivalent per gram-atom of platinum.
An alkenylaminodisiloxane having the formula ##STR12## wherein each R.sup.1 is independently hydrogen, C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl and R.sup.2 is C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl.
A cyclic disiloxazane having the formula ##STR13## wherein each R.sup.1 is independently hydrogen, C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl and R.sup.2 is C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl.
An alkoxyaminoalkyltetraorganodisiloxane having the formula ##STR14## wherein each R.sup.1 is independently hydrogen, C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl;
- R.sup.2 is C.sub.1-4 primary or secondary alkyl, phenyl or substituted phenyl;
- and R.sup.3 is C.sub.1-4 alkyl.
Dependencies are inferred from the claim text.