General Electric Company

Howard A Vaughn, Jr

Steven W Scott

James E Doin

Joseph B Williams

Fred F Holub

Glenn D Cooper

William R Haaf

Ta-Yen Ching

Donald B Jaquiss

Vincent Vodicka

John B Luce

William J O'Malley

Charles A Bialous, Deceased

By Edwin Reder, Administrator

A method for securing protective silicone resin coatings to plastics without the use of primers is disclosed. Shock curing a silicone resin coating composition on transparent plastic substrates, such as polycarbonate, at a temperature not substantially below 140.degree. C. is found to give a tough, adherent coating without distorting the substrate or diminishing its optical clarity, and without the use of primers. The suitability, after incorporation into the silicon resin coating composition, of certain silylated ultraviolet light screening compounds for shock curing is also disclosed.

Method for primerless coating of plastics

Ultraviolet radiation resistant silicone resin coating compositions are provided having improved thermoformability. Improved thermoformability and shortened required aging are achieved by the addition of a Lewis acid compound to the coating compositions is disclosed. Thermoformability is also improved by using the UV screen containing silicone resin coating composition in conjunction with extensible acrylate primers.

Thermoformable silicone resin coating composition and dual component

A silicone resin coating composition with improved shelf life is disclosed herein. A coating composition having a basic pH in the range of from 7.1-7.8 and prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion is diluted to 10-15% solids. A compatible thickening agent is then added.

Silicone resin coating composition with improved shelf life

Silicone resin coating compositions, which when applied to a solid substrate provide an abrasion resistant coating thereto, are disclosed herein. The coating compositions have a basic pH in the range of from 7.1-7.8 and are prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion.

Silicone resin coating composition

A silicone resin coating composition is provided which provides a tough, abrasion-resistant coating when applied to a solid substrate. The coating composition has a basic pH in the range of from 7.1-7.8 and is prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion. A thickening agent and an ultraviolet light screening agent are added to the resultant hydrolysis product.

Silicone resin coating composition containing an ultraviolet light

This invention relates to coating compositions prepared by prehydrolyzing the silane function of a silylated ultraviolet radiation screening compound and adding it to an aqueous silicone resin composition. Hydrolyzing the silane function renders the ultraviolet screen a silanol which is a compatible component in the silicone resin compositions contemplated.

Silicone resin coating composition adapted for primerless adhesion to

A composition comprising (a) an aromatic polycarbonate and (b) a minor amount of a oxyalkylene siloxane block copolymer, and, optionally, an organic phosphite or phosphonite and/or epoxy compound provide lower viscosity in the melt without producing brittle molded parts.

Composition comprising an aromatic polycarbonate and a

Silicone resin coating compositions, having a basic pH in the range of from 7.1 to 7.8 are provided. These coating compositions are prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion and adding to the resultant hydrolysis product a linear functionally terminated oligomeric siloxane. When applied to a solid substrate, these silicone resin compositions provide an abrasion resistant coating having improved resistance to cracking.

A silicone resin coating composition which, when applied to a solid substrate, provides a thick abrasion resistant coating thereto, is disclosed herein. The coating composition has a basic pH in the range of from 7.1-7.8 and is prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion. A thickening agent is added to the resultant hydrolysis product.

Solid substrate coated with silicone resin coating composition

There is provided by the present case a novel primer composition for plastics, metals, glass and ceramics composed of optionally a silane containing hydrolyzable groups and functional groups such as, alkoxy nitrogen functional groups mixed with the reaction product of the foregoing silane and an anhydride selected from the class consisting of cyclic anhydrides and cyclic dianhydrides. The foregoing primer composition is usually applied to the substrate to be protected in solution form utilizing, preferably, an aliphatic alcohol solvent. The abrasion protective top layer itself consists of at 80 to 100% solids of a silane which may be an alkoxylated silane or more preferably an acyloxy functional silane wherein the top coat is preferably cured on top of primer layer which is applied to the substrate at a temperature of anywhere from 25.degree. to 130.degree. C. depending on the glass transition temperature of the substrate which should not be exceeded.

Growing community of inventors

Schenectady, NY, United States of America

Howard A Vaughn, Jr