Composition for providing an abrasion resistant coating on a substrate with a matched refractive index and controlled tintability

A process for providing a substrate with an abrasion resistant coating wherein the abrasive resistant coating has a refractive index, the process comprising:

• providing an aqueous-organic solvent mixture comprising hydrolysis products and partial condensates of an epoxy functional silane, a metal oxide composite colloid, a disilane, a carboxylic acid functional compound wherein the carboxylic acid functional compound is selected from the group consisting of monofunctional carboxylic acids, multifunctional carboxylic acids, anhydrides, and combinations thereof, from about 0.1 to about 70 weight percent, based on the total solids of the composition, of a mixture of hydrolysis products and partial condensates of a silane additive represented by the formula R15xSi(OR16)4−x where x is an integer of 0, 1, 2 or 3, R15 is H, an alkyl group containing from 1 to about 10 carbon atoms, a functionalized alkyl group, an alkylene group, an aryl group, an alkyl ether group and combinations thereof, R16 is H, an alkyl group containing from 1 to about 10 carbon atoms, an acetyl group and combinations thereof and from about 0.1 to about 70 weight percent, based on the total solids of the composition, of an acidic colloidal silica component wherein the disilane is represented by the formula (R10O)xR113−xSi—R12y—SiR133−x (OR14)x, where x is 0, 1, 2 or 3 and y is 0 or 1, R11 and R13 are H or an alkyl group containing from about 1 to 10 carbon atoms, a functionalized alkyl group, an alkylene group, an aryl group, an alkylpolyether group and combinations thereof, R10 and R14 are H, an alkyl group containing from about 1 to 10 carbon atoms, an acetyl group, and combinations thereof, wherein if y is 1 then R12 can be an alkylene group containing from about 1 to 12 carbon atoms, an alkylenepolyether containing from about 1 to 12 carbon atoms, an aryl group, an alkylene substituted aryl group, an alkylene group which may contain one or more olefins, or an oxygen or sulfur atom, and further wherein if x=0, then R11 and R13 are a chlorine or bromine atom, and wherein the epoxy functional silane is present in a molar ratio to the disilane component and the metal oxide composite colloid component of from about 0.1:1 to 4:1 and the amount of water present in the aqueous-organic solvent mixture is an amount sufficient to provide a substantially homogenous mixture of hydrolysis products and partial condensates of all reactive components;
• applying an effective amount of the aqueous-organic solvent mixture to at least one side of the substrate to provide a substantially uniform coating of the aqueous-organic mixture on the at least one side of the substrate;
• and
• curing the coating of the aqueous-organic solvent mixture to provide an abrasion resistant coating having a reflective index on at least one side of the substrate.

A process for providing a substrate with an abrasion resistant coating which has a refractive index, the process comprising:

• applying an effective amount of an aqueous-organic solvent mixture to at least one surface of a substrate to form a coating of the aqueous-organic solvent mixture on the at least one surface of the substrate the aqueous-organic solvent mixture contains hydrolysis products and partial condensates of an epoxy functional silane, a metal oxide composite colloid, a disilane and a carboxylic acid functional compound wherein the carboxylic acid functional compound is selected from the group consisting of monofunctional carboxylic acids, multifunctional carboxylic acids, anhydrides, and combinations thereof wherein the disilane is represented by the formula (R10O)xR113−xSi—R12y—SiR133−x (OR14)x, where x is 0, 1, 2 or 3 and y is 0 or 1, R11 and R13 are H or an alkyl group containing from about 1 to 10 carbon atoms, a functionalized alkyl group, an alkylene group, an aryl group, an alkylpolyether group and combinations thereof, R10 and R14 are H, an alkyl group containing from about 1 to 10 carbon atoms, an acetyl group, and combinations thereof, wherein if y is 1 then R12 can be an alkylene group containing from about 1 to 12 carbon atoms, an alkylenepolyether containing from about 1 to 12 carbon atoms, an aryl group, an alkylene substituted aryl group, an alkylene group which may contain one or more olefins, or an oxygen or sulfur atom, and further wherein if x=0, then R11 and R13 are a chlorine or bromine atom, and further wherein the epoxy functional silane is present in a molar ratio to the disilane component and the metal oxide composite colloid component of from about 0.1:1 to 4:1;
• and from about 0.1 to about 70 weight percent, based on the total solids of the aqueous-organic solvent mixture of a colloidal silica component, and wherein the colloidal silica component is acidic, basic or neutral;
• and
• curing the coating of the aqueous-organic solvent mixture on the at least one surface of the substrate to provide the substrate with an abrasion resistant coating.

A process for providing an abrasion resistant coating on the substrate which has a refractive index, the process comprising:

• applying to at least one surface of substrate an effective amount of an aqueous-organic solvent mixture containing hydrolysis products and partial condensates of an epoxy functional silane, a metal oxide composite colloid, a disilane, a carboxylic acid functional compound and from about 0.1 to about 70 weight percent, based on the total solids of the aqueous-organic solvent mixture, of a mixture of hydrolysis products and partial condensates of a silane additive represented by the formula R15xSi(OR16)4−x where x is an integer of 0, 1, 2 or 3, R15 is H, an alkyl group containing from 1 to about 10 carbon atoms, a functionalized alkyl group, an alkylene group, an aryl group an alkyl ether group and combinations thereof, R16 is H, an alkyl group containing from 1 to about 10 carbon atoms, an acetyl group and combinations thereof and wherein the disilane is represented by the formula (R10O)xR113−xSi—R12y—SiR133−x (OR14)x, where x is 0, 1, 2 or 3 and y is 0 or 1, R11 and R13 are H or an alkyl group containing from about 1 to 10 carbon atoms, a functionalized alkyl group, an alkylene group, an aryl group, an alkylpolyether group and combinations thereof, R10 and R14 are H, an alkyl group containing from about 1 to 10 carbon atoms, an acetyl group, and combinations thereof, wherein if y is 1 then R12 can be an alkylene group containing from about 1 to 12 carbon atoms, an alkylenepolyether containing from about 1 to 12 carbon atoms, an aryl group, an alkylene substituted aryl group, an alkylene group which may contain one or more olefins, or an oxygen or sulfur atom, and further wherein if x=0, then R11 and R13 are a chlorine or bromine atom, wherein the carboxylic acid functional compound is selected from the group consisting of monofunctional carboxylic acids, multifunctional carboxylic acids, anhydrides, and combinations thereof, and wherein the epoxy functional silane is present in a molar ratio to the disilane component and the metal oxide composite colloid component of from about 0.1:1 to 4:1;
• and from about 0.1 to about 70 weight percent, based on the total solids of the composition, of a colloidal silica component, wherein the colloidal silica component is acidic, basic or neutral;
• and
• curing the aqueous-organic solvent mixture to produce a substrate having an abrasion resistant coating having a refractive index substantially corresponding to the refractive index of the substrate.