Patent EP0576166A2 successfully refreshed from Google Patents.
EP0576166A2
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Heat curable silicone hardcoat compositions
Assignee: General Electric Co
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Filing: 1993-06-04
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Granted: —
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Expires: 2013-06-04
Abstract
Abstract A heat curable silicone hardcoat composition is provided which utilizes an effective amount of a tetraalkyl ammonium fluoride as a curing catalyst in an aqueous/organic solvent dispersion of colloidal silica and a partial condensate of an organoalkoxysilane.
Inventors
- 👤 Gregory Ronald Gillette
- 👤 Martin Arthur Trapp
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 22:25
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A heat curable silicone hardcoat composition comprising by weight, an aqueous/organic solvent dispersion comprising 10-50% of solids which consist essentially of 10-70% by weight of colloidal silica and 30-90% by weight of the partial condensate of an organoalkoxy silane having the formula, (R¹) a Si(OR²) 4-a , and an amount of a tetraalkyl ammonium fluoride of formula, (R)₄N⁺F⁻ , which is effective as a curing catalyst, where R is a C (2-4) alkyl radical, R¹ is a C (1-6) monovalent hydrocarbon radical, R² is a member selected from hydrogen and R¹ and a is a whole number equal to 0 to 2 inclusive.
Claim 2
Dependent Claim
35 words
A heat curable silicone hardcoat composition in accordance with claim 1, where the tetraalkyl ammonium fluoride is a member selected from the class consisting of tetramethyl ammonium fluoride, tetraethyl ammonium fluoride and tetrabutyl ammonium fluoride.
Claim 3
Dependent Claim
14 words
A silicone hardcoat composition in accordance with claim 1, where the organoalkoxysilane is methyltrimethoxysilane.
Claim 4
Dependent Claim
133 words
A thermoplastic composite having improved abrasion resistance comprising a thermoplastic substrate which has been treated with a heat curable silicone hardcoat composition followed by the thermal cure of such heat curable silicone hardcoat composition comprising by weight, an aqueous/organic solvent dispersion comprising 10-50% by weight of solids which consist essentially of 10-70% by weight of colloidal silica and 30-90% by weight of the partial condensate of an organoalkoxy silane having the formula, (R¹) a Si(OR²) 4-a , and an amount of a tetraalkyl ammonium fluoride of formula (R)₄N⁺F⁻ , which is effective as a curing catalyst, where R is a C (2-4) alkyl radical, R¹ is a C (1-6) monovalent hydrocarbon radical, R² is a member selected from hydrogen and R¹ and a is a whole number equal to 0 to 2 inclusive.
Claim 5
Dependent Claim
18 words
An abrasion resistant thermoplastic composite in accordance with claim 4, where the thermoplastic substrate is a polycarbonate substrate.
References Cited (Backward Citations)
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