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US 5,231,156 AGranted
Organic/inorganic hybrid polymers
AssigneePPG Industries, Inc.
InventorChia-Cheng Lin
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Abstract
Organic-inorganic hybrid polymers and a method of making them by reaction of organic monomers with organofunctional alkoxysilanes are disclosed.
Claims20
An organic-inorganic hybrid polymer comprising the reaction product of:
- a. 5 to 25 percent by weight of an organofunctional alkoxysilane of the general formula R.sub.x Si(OR').sub.4-x wherein R is an organofunctional radical, R' is a hydrolyzable low molecular weight alkyl group, and x is at least one and less than 4;
- and
- b. 95 to 75 percent by weight of an organic monomer capable of reaction with the organofunctional moiety of R and polymerization,
- wherein said alkoxysilane hydrolyzes and condenses to form the inorganic polymer portion and said organic monomer reacts with said organofunctional radical and further polymerizes to form said organic polymer portion of said organic-inorganic hybrid polymer.
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A method of making an organic-inorganic hybrid polymer comprising the steps of:
- a. hydrolyzing an organofunctional alkoxysilane of the general formula R.sub.x Si(OR').sub.4-x wherein R is an organofunctional radical, R' is a hydrolyzable low molecular weight alkyl group, and x is at least one less than 4;
- b. reacting 5 to 25 percent by weight of said organofunctional alkoxysilane with 95 to 75 percent by weight of a polymerizable organic monomer to form an organic-inorganic hybrid;
- and
- c. polymerizing said organic-inorganic hybrid to form an organic-inorganic hybrid polymer.
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Dependencies are inferred from the claim text.