Siloxane resins and method for making them

Details Siloxane resins and method for making them Siloxane resins and method for making them

1990-02-22

1992-04-28

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 31, 528 32, 528 39, 556462, 556450, 556455, C08G 7706

Patent

active

051090953

ABSTRACT:
Liquid organosiloxane MTQ resins of the general formula [M.sub.x T.sub.y Q.sub.z ].sub.n wherein M denotes a monofunctional, T a trifunctional and Q denotes a tetrafunctional siloxane unit is characterized by the fact that n has an average value of from 4 to 14, x+y is not less than z and not more than 2 z and x/y has a value of from 2/1 to 9/1. The resin molecule has at least one reactive substituent as defined and can be made by a method comprising (I) adding together a tetraalkoxysiloxane, a monoorganosilane and a triorganosilane or hexaorganodisiloxane in an acidified aqueous medium provided the tetraalkoxysilane is not added to the aqueous medium prior to the other components, (II) allowing the components to react together in said aqueous medium and, optionally (III) further reacting the finished resin with another compound having N atoms.

REFERENCES:
patent: 3036985 (1962-05-01), Daudt
patent: 3772247 (1973-11-01), Flannigan
patent: 4485130 (1984-11-01), Lampin et al.
patent: 4577523 (1986-03-01), Groenhof
patent: 4707531 (1987-11-01), Shirahata

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