Abstract: A wet paint spray booth treating agent includes sepiolite alone or further accompanying cationic polymer or amphoteric metal compound. In a method of treating a wet paint spray booth, the sepiolite alone or further accompanying the cationic polymer or the amphoteric metal compound is added. The wet paint spray booth treating agent and a method of treating a wet paint spray booth improve the effect of reduction in tackiness and decrease the load of agents to prevent the corrosion of furnishings. The sepiolite is a fibrous mineral containing chain structures having lots of micropores so that the sepiolite can reduce the tackiness of the paint due to reaction with the particles of the paint in such a manner to adsorb the particles in the micropores thereof.

Abstract: In a method of treating a wet paint spray booth, the sepiolite alone or further accompanying the cationic polymer or the amphoteric metal compound is added. The wet paint spray booth treating agent and a method of treating a wet paint spray booth improve the effect of reduction in tackiness and decrease the load of agents to prevent the corrosion of furnishings. The sepiolite is a fibrous mineral containing chain structures having lots of micropores so that the sepiolite can reduce the tackiness of the paint due to reaction with the particles of the paint in such a manner to adsorb the particles in the micropores thereof. Since both the particles of the paint and the particles of the sepiolite are negatively charged, when the cationic polymer or the amphoteric metal compound is added in combination with the sepiolite, the electrical repulsion is reduced so that the particles of the paint become easy to be adsorbed to improve the effect of the reduction in the tackiness.

Abstract: A polarizer plate including a polarizer substrate formed of a polarizer layer and supporting layers disposed on opposite surfaces of the polarizer layer; an undercoat layer disposed on one surface of the polarizer substrate; an anti-reflection layer disposed on the undercoat layer; and an anti-staining layer including a fluorine-containing silane compound disposed on said anti-reflection layer. The undercoat layer preferably has a specular glossiness according to JIS Z 8741 of from 10 to 40 and a haze according to JIS K 6900 of from 5 to 30%.

Abstract: A polarizer plate including a polarizer substrate formed of a polarizer layer and supporting layers disposed on opposite surfaces of the polarizer layer; an undercoat layer disposed on one surface of the polarizer substrate; an anti-reflection layer disposed on the undercoat layer; and an anti-staining layer including a fluorine-containing silane compound disposed on said anti-reflection layer. The undercoat layer preferably has a specular glossiness according to JIS Z 8741 of from 10 to 40 and a haze according to JIS K 6900 of from 5 to 30%.

Abstract: An inorganic coating film having improved water repellency is provided. The improved surface is provided by treating an inorganic coating film with a material that is reached or adsorbed on the surface of the inorganic coat to increase water repellency. The inorganic coating to be treated may be a silicon dioxide film. The materials used to treat the film include: (1) halogenated silane compounds; (2) silane compounds having a structure including at least one bond selected from Si--H, Si--OH, Si--OR, Si--SH and Si--SR, wherein R is an organic group; (3) silane compounds having a structure including at least one of ##STR1## wherein R1, R2 and R3 are hydrogen or an organic group and (4) reactive organic compounds having a fluorine substituting group, hydrogen fluoride or a metal fluoride.

Abstract: An antimicrobial polymer obtained by homo- or copolymerizing a phosphonium salt type vinyl monomer, such as 2-(methacrylic acid) ethyltri-n-octylphosphonium chloride, and a contact lens and an article for its care mainly comprising an antimicrobial resin obtained by copolymerizing a polymerizable monomer and a phosphonium salt type vinyl monomer are disclosed. The antimicrobial polymer has a broad antimicrobial spectrum and produces a sufficient antimicrobial effect after a short contact time. The contact lens and article for its care are hardly effected by contamination with microorganisms while retaining excellent optical performance and processability.

Abstract: Coated synthetic resin lenses having a primer layer of a copolymer of an acrylic and/or methacrylic monomer and an aromatic vinyl compound between the base material and a cured abrasion resistant layer of colloidal silica and an inorganic anti-reflection coating are provided. The cured coat of colloidal silica has a particle diameter between about 1 and 100 millimicrons and is dispersed in a hydrolyzed silane compound. The organic primer coating improves adhesion properties between the base material and the cured abrasion-resistant layer resulting in coated lenses of improved impact resistance.

Abstract: A transparent optical article is constituted of an optical resin. The optical resin in obtained by polymerizing a feed monomer containing at least a diester of unsaturated dicarboxylic acid selected from the group consisting of itaconic acid, citraconic acid and mesaconic acid. The ester group forming the diester is ##STR1## or R, wherein X represents a halogen atom, m represents zero or an integer of 1 to 5 and R represents an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 1 to 12 carbon atoms or a cycloalkyl group having 3 to 12 carbon atoms. At least one of the ester groups has an aromatic ring defined above.

Abstract: An improved synthetic resin opthalmic lens and a method for treating the surface of the lens are provided. The lens is formed by polymerizing at least one bis(allyloxycarbonyloxy-alkoxy) dihalide-phenyl alkane and one bifunctional allyl compound, optionally with a bis(allylcarbonate) compound. The lens is chemically treated with an aqueous solution of polyethyleneglycol and an alkali metal hydroxide and a surface hard coat is formed on the treated surface.

Abstract: A synthetic resin lens having a refractive index of at least 1.55 and an antireflection coating thereon is provided. The antireflection coating includes at least a hard coat layer formed of a dielectric substance having a refractive index n.sub.h disposed on the lens having a refractive index n.sub.s (n.sub.s .noteq.n.sub.h) and at least one antireflection layer of a dielectric or metallic material disposed between the lens and the hard coat layer. The antireflection layer has a refractive index n in the range represented by the formula: ##EQU1## and an optical film thickness of 4 (where denotes a wavelength in the range between about 450 nm to 650 nm) or two or more plies optically equivalent to a single layer of the antireflection material. The synthetic resin lens may be prepared by radical polmerization of a mixed monomer solution of styrene, 2,2-bis[3,5-dibromo-4-(2-methacryloloxyethoxy)phenyl]propane, and ultraviolet absorber and a light stabilizer.

Abstract: Photochromic coating compositions for synthetic resin ophthalmic lenses to impart photochromic properties to the lenses are provided. The photochromic coating composition includes an organic silicon compound to impart a surface hard coating and a photochromic material dispersed in the hard coat to impart photochromic properties. The photochromic materials may include compounds including the molybdic acid amine group, dithizone-mercury polymers, halogenated silver or copper, and a benzopyrylospiran compound. The coating composition is prepared by dispersing the photochromic material in a silicon hard coating composition. The coating composition may be coated on the surface of a synthetic resin lens by dipping, spraying, spin coating, flow coating and the like and then dry-heated to be cured. The coating composition is applied in thicknesses from about 1 to 30 microns.

Abstract: A surface hard coating composition for a synthetic resin lens including:(A) at least one organic silicon compound represented by the general formula ##STR1## wherein R.sup.1 is a hydrocarbon group having from one to six carbon atoms or an organic group including vinyl, methacryloyloxy or an epoxy radical, R.sup.2 is a hydrocarbon group having from one to four carbon atoms, R.sup.3 is a hydrocarbon or alkoxy alkyl group having from one to five carbon atoms or a hydrogen atom and l is 0 or one;(B) colloidal silica;(C) at least one poly functional epoxy compound; and(D) magnesium perchlorate.