Method for the preparation of polyheterosiloxanes

Details Method for the preparation of polyheterosiloxanes Method for the preparation of polyheterosiloxanes

1995-02-03

1996-10-08

Glass, Margaret W.

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

Synthetic resins

From silicon reactant having at least one...

528 39, 528 10, 528 12, 528 31, 528 32, C08G 7706, C08G 7708

Patent

active

055632289

ABSTRACT:
The invention is a method for the preparation of organic solvent-soluble polyheterosiloxanes containing MO.sub.2 (M=Ti or Zr) and SiO.sub.2 units. A compound MA.sub.4 (M=Ti or Zr, A=hydrolyzable group) and a compound Si(OR).sub.4 (R=hydrocarbon group or alkali metal atom) are hydrolyzed and condensed in the presence of a carboxylic acid, a phenol, or a diketone. This is followed by the addition of an organosilane R.sup.1.sub.3 SiX (R.sup.1 =hydrogen or hydrocarbon group, X=hydrolyzable group) and hydrolysis and condensation.

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