Method for making polysilsesquioxanes and organohydridosilanes
- Albuquerque, NM
A method for disproportionation of an oligohydridosiloxane to produce a polysilsesquioxane compound and an organohydridosilane compound when contacted with a basic catalyst. The basic catalyst can be a tetraalkylammonium hydroxide, an alkali metal hydroxide, and an alkali earth hydroxide. These basic catalysts are generally dissolved in an organic solvent for delivery. The hydroxide catalysts are attractive because many readily decompose by heating above 150.degree. C., thus being easily removed from the final materials. The oligohydridosiloxane is contacted with the basic catalyst under conditions effective to catalytically convert the oligohydridosiloxane into a polysilsesquioxane compound and an organohydridosilane compound. The reaction can occur in either an inert or oxidative atmosphere and can occur without heating, at room temperature. Both polysilsesquioxane foams and gels of the formula (RSiO.sub.1.5).sub.n can be produced.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Number(s):
- US 6284908
- OSTI ID:
- 873969
- Country of Publication:
- United States
- Language:
- English
Synthesis and high temperature chemistry of methylsilsesquioxane polymers produced by titanium-catalyzed redistribution of methylhydridooligo- and -polysiloxanes
|
journal | July 1990 |
Polysilsesquioxanes Through Base-Catalyzed Redistribution of Oligohydridosiloxanes
|
journal | January 2000 |
Redistribution reactions of alkoxy- and siloxysilanes, catalyzed by dimethyltitanocene
|
journal | March 1990 |
Similar Records
THE PREPARATION, PROPERTIES AND STRUCTURE OF CARBONATE GLASSES. Interim Report, October 1, 1962-August 1, 1963
The nature of the alkoxide group, solvent, catalyst, and concentration on the gelation and porosity of hexylene-bridged polysilsesquioxanes
Related Subjects
polysilsesquioxanes
organohydridosilanes
disproportionation
oligohydridosiloxane
produce
polysilsesquioxane
compound
organohydridosilane
contacted
basic
catalyst
tetraalkylammonium
hydroxide
alkali
metal
earth
catalysts
dissolved
organic
solvent
delivery
attractive
readily
decompose
heating
150
degree
easily
removed
final
materials
conditions
effective
catalytically
convert
reaction
occur
inert
oxidative
atmosphere
temperature
foams
gels
formula
rsio
produced
ammonium hydroxide
oxide catalyst
alkali earth
silane compound
conditions effective
easily removed
organic solvent
alkali metal
metal hydroxide
basic catalyst
oxide catalysts
/999/528/