Abstract:
Coated articles are provided comprising: (a) a substrate; (b) a porous sol-gel layer superimposed on at least one surface of the substrate; wherein the porous sol-gel layer comprises a hydrolyzed tetraalkoxysilane; and (c) a sealant layer superimposed on at least one surface of the porous sol-gel layer; wherein the sealant layer comprises an alkyltrihalosilane. The coated articles demonstrate superior abrasion resistance due to a glass-like layer formed from the combination of the porous sol-gel layer and sealant layer.
Abstract:
Described are aqueous compositions of an effective amount of at least one photosensitive material and at least one polymerizable component that are adapted to at least partially form photosensitive microparticles or at least partially crosslinked photosensitive polymeric microparticles. The photosensitive polymeric microparticles are made of integral surface and interior domains wherein at least one of the surface and/or interior domains is photosensitive. Also described are aqueous dispersions of such microparticles, ways of producing such microparticles and photosensitive articles such as optical elements that incorporate the photosensitive polymeric microparticles.
Abstract:
Describes a photochromic article, e.g., an ophthalmic photochromic plastic article, such as a lens, in which the article includes (1) a rigid substrate, e.g., a transparent substrate such as a glass or organic polymeric substrate, as for example, a thermoset or thermoplastic substrate, (2) a photochromic polymeric coating appended to at least a portion of at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one organic photochromic material, e.g., spirooxazine, naphthopyran, diarylethene and/or fulgide, and (3) a thermally cured transparent thermoset polymeric coating superposed on, e.g., coherently appended to, the photochromic coating, the thermally cured polymeric coating being harder than the photochromic polymeric coating. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the thermally cured polymer coating, e.g., an abrasion-resistant coating comprising an organo silane; and a photochromic article having an antireflective coating affixed to the abrasion-resistant coating.
Abstract:
Disclosed are composite transparencies and methods for their production. The colored composite transparencies include a surface at least partially coated with a transparent tinted coating deposited from a coating composition comprising polymer-enclosed color-imparting particles.
Abstract:
The physical and mechanical properties of closed cell phenolic foam are improved by incorporating into certain foamable phenolic resole compositions small quantities of alkyl glucosides, particularly methyl glucosides. The alkyl glucosides also improve the process for preparing the closed cell phenolic foam.
Abstract:
The present invention is directed to a method of preparing a phenolic foam that has cell walls which are substantially free of perforations. The method comprises using certain anhydrous aryl sulfonic acids as the foaming and curing catalysts. The useful anhydrous aryl sulfonic acids are those which have a pKa of less than about 2.0 and which change the compatibility of the phenolic resole with water. The preferred anhydrous aryl sulfonic acid is a combination of toluene sulfonic acid and xylene sulfonic acid. The invention is also directed to a phenolic foam having cell walls which are substantially free of perforations and to foamable phenolic resole compositions for preparing the phenolic foam.
Abstract:
Described are non-aqueous dispersions of photosensitive polymeric microparticles, comprising: a) an organic continuous phase comprising an organic solvent; and b) photosensitive polymeric microparticles dispersed in the organic continuous phase. The microparticles comprise an at least partially polymerized component having integral surface and interior domains, wherein the surface domain comprises a polymeric material that is solubilized by the organic solvent, the interior domain comprises a polymeric material that is insoluble in the organic solvent, and the surface domain and/or interior domain is photosensitive. Also described are methods of producing such non-aqueous dispersions, curable film-forming compositions containing them, and photosensitive coated substrates.
Abstract:
Coating compositions are disclosed that include an alkoxide and a silica sol that includes silica nanoparticles and a polymerizable (meth)acrylate binding agent. The polymerizable (meth)acrylate binding agent remains substantially uncrosslinked after the coating composition has been cured to form a hard coat. Also disclosed are articles at least partially coated with a hard coat deposited from such a coating composition, methods for depositing a hard coat on at least a portion of a plastic substrate, and methods for improving the adhesion and abrasion resistance of a coating composition.
Abstract:
Described are non-aqueous dispersions of photosensitive polymeric microparticles, comprising: a) an organic continuous phase comprising an organic solvent; and b) photosensitive polymeric microparticles dispersed in the organic continuous phase. The microparticles comprise an at least partially polymerized component having integral surface and interior domains, wherein the surface domain comprises a polymeric material that is solubilized by the organic solvent, the interior domain comprises a polymeric material that is insoluble in the organic solvent, and the surface domain and/or interior domain is photosensitive. Also described are methods of producing such non-aqueous dispersions, curable film-forming compositions containing them, and photosensitive coated substrates.
Abstract:
Liquid compositions are disclosed that include a photocatalytic material and a hydrophilic binder that includes an essentially completely hydrolyzed organosilicate. Also disclosed are methods of making such compositions, methods of coating a substrate with a hydrophilic composition, and substrates coated with such compositions. The compositions may, for example, be embodied as stable one-pack compositions.