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Title: Method for making polysilsesquioxanes and organohydridosilanes

Abstract

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.

Inventors:
 [1];  [1]
  1. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
873969
Patent Number(s):
6284908
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07F - ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; 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/

Citation Formats

Loy, Douglas A, and Rahimian, Kamyar. Method for making polysilsesquioxanes and organohydridosilanes. United States: N. p., 2001. Web.
Loy, Douglas A, & Rahimian, Kamyar. Method for making polysilsesquioxanes and organohydridosilanes. United States.
Loy, Douglas A, and Rahimian, Kamyar. Mon . "Method for making polysilsesquioxanes and organohydridosilanes". United States. https://www.osti.gov/servlets/purl/873969.
@article{osti_873969,
title = {Method for making polysilsesquioxanes and organohydridosilanes},
author = {Loy, Douglas A and Rahimian, Kamyar},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

Patent:

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Works referenced in this record:

Polysilsesquioxanes Through Base-Catalyzed Redistribution of Oligohydridosiloxanes
journal, January 2000


Redistribution reactions of alkoxy- and siloxysilanes, catalyzed by dimethyltitanocene
journal, March 1990