Kureha Kagaku Kogyo Kabushiki Kaisha

Kureha Corporation

Nissan Chemical Industries Limited

Dainippon Ink and Chemicals, Incorporated

Kureha Chemical Industry Company, Limited

Hiroki Katono

Teruo Sakagami

Takeo Ogihara

Masuhiro Shouji

Katsuichi Machida

Naoki Hayashi

Yasufumi Fujii

Masuhiro Syouji

Hiroshi Hasebe

Yasuhiro Ohnishi

Tomoyoshi Koizumi

Osamu Tanegashima

Yutaka Kobayashi

Tsukasa Ikeda

Rumi Ueda

Tomomi Ujiie

Haruyoshi Takatu

The present invention provides a solubilizing agent that can give solubility or dispersibility in resins to copper-containing phosphorus compounds, and a composition containing the solubilizing agent. The solubilizing agent of the invention comprises a compound represented by the following general formula (100) having a main chain with an oxyalkylene unit. [wherein Rrepresents hydrogen or a b-valent organic group, Rrepresents C2-4 alkylene, Rrepresents hydrogen, alkyl, aryl or acyl, a represents an integer of 1-50 and b represents an integer of 1-4.]

Solubilizer and composition containing same

A near infrared absorptive composition of the present invention contains phosphate compounds represented by Formula (8)-c and Formula (8)-d below; and copper ions. An optical material of the present invention is a material wherein the near infrared absorptive composition is mixed in a resin.

Near-infrared-absorbing composition and optical material

A building material is formed from a specific composition containing a phosphoric ester compound represented by the following formulae (8)-c and (8)-d and copper ions, in a resin plate.

Building material

The optical filter of the present invention is provided with a near infrared light absorption layer that contains a component composed of copper ions and a phosphoric ester compound expressed by the following Formula (10), in which the phosphorus atom content in the near infrared light absorption layer is 0.4 to 1.3 mol per mole of copper ions, and the copper ion content in the near infrared light absorption layer is 2 to 60 wt %. Thus keeping the phosphorus atom and copper ion content within specific ranges results in good near infrared light absorption and in improved moisture resistance whereby devitrification caused by whitening is suppressed

Optical filter and process for producing the same

Disclosed herein are a novel phosphate compound by which a copper ion can be dispersed in a high proportion in a synthetic resin, thereby providing excellent visible ray-transmitting property and performance that near infrared rays are absorbed with high efficiency, a preparation process thereof, a phosphate copper compound obtained from the phosphate compound and a preparation process thereof, and a near infrared ray-absorbing acrylic resin composition which has both excellent visible ray-transmitting property and near infrared rays absorption capability.

Phosphate compound and preparation process thereof, phosphate copper compound and preparation process thereof, near infrared ray absorber, and near infrared ray-absorbing acrylic resin composition

An absorber of rays outside the visible region. The absorber includes a base made of a transparent synthetic resin with electroconductive anhydrous zinc antimonate incorporated therein; or a base made of a transparent synthetic resin with a layer formed of a synthetic resin and electroconductive anhydrous zinc antimonate incorporated therein, for absorbing rays outside the visible region, being disposed on a surface of the base; or wherein the layer is formed by depositing electron conductive anhydrous zinc antimonate powder on a surface of the base made of a transparent synthetic resin. The electroconductive anhydrous zinc antimonate can be a powder having a molar ratio of ZnO to Sb,O,of 0.8 to 1.2 and a primary particle size of 5 to 200 nm. The light transmittances of the absorber are high in the visible region and low in both the ultraviolet and infrared wavelength regions.

Method of absorbing rays outside a visible region

A polymeric optical low-pass filter of the birefringent type is provided which is lightweight and small, and which can be easily produced. Also provided are a polymeric optical low-pass filter device including the polymeric optical low-pass filter; and a composite optical filter including the polymeric optical low-pass filter. The optical low-pass filter comprises an optically anisotropic polymer film in which the displacement distance S between the ordinary ray and the extraordinary ray represented by the following formula is 1-70 .mu.m:

Polymeric optical low-pass filter and device thereof

A component optical filter and a process for production of the filter includes the steps of arranging a pair of transparent plates, at least one of which has an optical low-pass filtering function, to oppose each other with a gap therebetween and filling the gap with a monomer composition of the formula PO(OH).sub.n R.sub.3 -n wherein R is a polymerizable functional group represented by CH.sub.2 .dbd.CXCOO(C.sub.2 H.sub.4 O).sub.m- and (c) a metallic compound composed of a copper compound, and then subjecting the monomer composition to a polymerization treatment. The result is a laminated composite filter having at least one optical low-pass filter and an intermediate layer forming a luminosity factor-compensating filter.

Production process of composite optical filter

Disclosed herein is a plastic optical material, which has excellent glare-proofness and transparency and is low in the degree of coloring. The plastic optical material of the invention comprises a polymer containing a phosphate group and a trivalent neodymium ion therein, wherein the polymer further contains at least one metal ion selected from the group consisting of a trivalent praseodymium ion and a trivalent holmium ion. The phosphate group may preferably be chemically bonded to a molecular structure constituting the polymer. In particularly, the polymer may preferably be a copolymer obtained by copolymerizing a monomer represented by the following formula I:

Plastic optical material

Disclosed herein is an infrared-blocking optical filter having optical properties that the transmittance to rays in a visible region is excellent while rays in a near infrared region, particularly, in a wavelength range longer than 1200 nm are cut off or attenuated with high efficiency. The infrared-blocking optical filter includes a transparent substrate and either of the following infrared-blocking film (A) and (B) provided on a surface of the transparent substrate. Film (A): an infrared-blocking film formed on a synthetic resin in which fine powder of metal oxide material composed of indium oxide and/or tin oxide is dispersed; and Film (B): an infrared-blocking film formed of a deposit of a metal oxide material composed of indium oxide and/or tin oxide. The infrared-blocking film may be formed on a transparent support member to constitute an infrared-blocking composite film which is provided on a surface of the transparent substrate to form an infrared-blocking optical filter.

Infrared-blocking optical fiber

Disclosed herein are plastic optical materials having properties that rays in a specific visible range are absorbed, being low in specific gravity and easy to conduct processing or machining, and having excellent glare-proofness. One of the plastic optical material comprises an acrylic polymer containing a specific phosphate group represented by the formula PO(OH).sub.n -- (n being 1 or 2) of 0.5-60%, and a metal ion component comprising a neodymium ion of 0.04-10 parts based on 100 parts of the acrylic polymer, and has properties that rays in a wavelength range about 580 nm are absorbed. Another plastic optical material comprises 100 parts of the same acrylic polymer, and 0.1-12 parts of a metal ion component composed of a manganese ion in a predominant amount and a neodymium ion, and has properties that rays in wavelength ranges of 400-500 nm and 555-605 nm are absorbed with high efficiency. This plastic optical material is particularly suitable for use in plastic lenses for sunglasses. A production process of the material is also disclosed which comprises the step of polymerizing a monomer mixture composed of a specific phosphate group-containing monomer and at least one copolymerizable monomer in the presence of at least one metallic compound of the desired kind and proportion.

Plastic optical material and production process thereof

Disclosed herein is a plastic optical filter which has a combined optical function that it has an effect of effectively blocking or attenuating rays in the wavelength range of a near infrared region and excellent luminosity factor-compensating ability and is provided with an optical low-pass filtering function, and is low in specific gravity and hygroscopicity, free from devitrification with time and easy to conduct its processing or machining and polishing treatment. This plastic optical filter includes a filter base formed of a plastic material comprising a copolymer obtained by copolymerizing a monomer represented by the following formula I:

Plastic optical filter

Disclosed herein is an optical filter comprising: a resin material obtained by copolymerizing a monomer represented by the following formula (I) and a monomer copolymerizable therewith; and a metallic compound mainly composed of a copper compound;

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Iwaki, Japan

Hiroki Katono