Process for adhering a photochromic coating to a polymeric substrate
AssigneeTransitions Optical, Inc.
InventorsRobert W. Walters, Kevin J. Stewart
Life of this patent
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Abstract
Described is a process for producing an adherent organic polymeric layer on organic polymeric substrates following the steps of (a) treating the surface of the polymeric substrate to provide reactive groups; (b) applying to the treated surface a polymerizable composition of a surface modifying amount of an organofunctional silane, a catalyzing amount of material which generates acid upon exposure to actinic radiation, and a solvating amount of solvent; (c) exposing the coated surface to an adhesion improving amount of actinic radiation; and (d) applying and curing a photochromic or non-photochromic polymer-forming composition on the coated surface. Also described are articles produced by the process.
Claims24
A process for forming an adherent organic polymeric layer on an organic polymeric substrate comprising:
- (a) treating the surface of the polymeric substrate to provide reactive groups at said surface;
- (b) applying to the treated surface an adhesive layer-forming composition consisting essentially of:
- (i) a surface modifying amount of an organofunctional silane represented by the general formula:
- (R.sub.1).sub.a (R.sub.2).sub.b Si(OR.sub.3).sub.c
- wherein each R.sub.1 is an organofunctional radical selected from vinyl, allyl, vinyl-functional hydrocarbon radical, allyl-functional hydrocarbon radical, (meth)acryloyl-functional hydrocarbon radical, styryl-functional hydrocarbon radical, mercapto-functional hydrocarbon radical and mixtures of such organofunctional radicals, said hydrocarbon radicals being selected from aliphatic radicals, aromatic radicals and mixtures of such hydrocarbon radicals and having less than 20 carbon atoms;
- each R.sub.2 is a monovalent hydrocarbon radical having less than 20 carbon atoms selected from aliphatic radicals, aromatic radicals and mixtures of such hydrocarbon radicals;
- each R.sub.3 is a monovalent organic radical of less than 20 carbon atoms which is selected from aliphatic hydrocarbon radicals, aromatic hydrocarbon radicals, alkoxyalkyl radicals, acyl radicals and mixtures of such radicals;
- letter a is 1 or 2, b is 0, 1 or 2 and c is 1, 2 or 3 provided that the sum of a+b+c equals 4;
- and
- (ii) a catalyzing amount of material which generates acid on exposure to actinic radiation and, optionally, a photosensitive dye;
- and
- (iii) a solvating amount of organic solvent and, optionally, an organofunctional silane-hydrolyzing amount of water;
- (c) exposing the adhesive layer surface of step (b) to an adhesion improving amount of actinic radiation;
- (d) applying an organic polymer-forming coating composition to the surface of the adhesive layer;
- and
- (e) curing the polymer-forming coating composition.
A process for forming an adherent organic photochromic polymeric layer on an organic polymeric substrate comprising:
- (a) treating the surface of the polymeric substrate to provide reactive groups at said surface;
- (b) applying to the treated surface an adhesive-layer forming composition consisting essentially of:
- (i) a surface modifying amount of an organofunctional silane represented by the general formula:
- (R.sub.1).sub.a (R.sub.2).sub.b Si (OR.sub.3).sub.c
- wherein each R.sub.1 is an organofunctional radical selected from vinyl, allyl, vinyl-functional hydrocarbon radical, allyl-functional hydrocarbon radical, (meth)acryloyl-functional hydrocarbon radical, styryl-functional hydrocarbon radical, mercapto-functional hydrocarbon radical or mixtures of such organofunctional radicals, said hydrocarbon radicals being selected from aliphatic radicals, aromatic radicals and mixtures of such hydrocarbon radicals and having less than 20 carbon atoms;
- each R.sub.2 is a monovalent hydrocarbon radical having less than 20 carbon atoms selected from aliphatic radicals, aromatic radicals and mixtures of such hydrocarbon radicals;
- each R.sub.3 is a monovalent organic radical of less than 20 carbon atoms which is selected from aliphatic hydrocarbon radicals, aromatic hydrocarbon radicals, alkoxyalkyl radicals, acyl radicals and mixtures of such radicals;
- letter a is 1 or 2, b is 0, 1 or 2 and c is 1, 2 or 3 provided that the sum of a+b+c equals 4;
- (ii) a catalyzing amount of material which generates acid on exposure to actinic radiation;
- and
- (iii) a solvating amount of organic solvent;
- (c) exposing the adhesive layer surface of step (b) to an adhesion improving amount of actinic radiation;
- (d) applying an organic polymer-forming coating composition containing a photochromic amount of photochromic compound(s) to the surface of the adhesive layer;
- and
- (e) curing the polymeric coating.
Dependencies are inferred from the claim text.