31results about How to "Less discoloration" patented technology

An LED leadframe or LED substrate includes a main body portion having a mounting surface for mounting an LED element thereover. A reflection metal layer serving as a reflection layer for reflecting light from the LED element is disposed over the mounting surface of the main body portion. The reflection metal layer comprises an alloy of platinum and silver or an alloy of gold and silver. The reflection metal layer efficiently reflects light emitted from the LED element and suppresses corrosion due to the presence of a gas, thereby capable of maintaining reflection characteristics of light from the LED element.

The present invention has its object to provide a curable composition which comprises a guanidine compound as a non-organotin type catalyst, is less discolored, has good surface curability, depth curability, strength rise and adhesiveness, and can retain the curability even after storage; the above object can be achieved by a curable composition which comprises: (A) an organic polymer containing a silyl group capable of crosslinking under siloxane bond formation, the silyl group being a group represented by the general formula (1): —SiX3 (1) (wherein X represents a hydroxyl group or a hydrolyzable group and the three X groups may be mutually the same or different), (B) a guanidine compound (B-1) as a silanol condensation catalyst, and (C) a plasticizer, wherein the content of the component (B-1) is not lower than 0.1 part by weight but lower than 8 parts by weight per 100 parts by weight of the component (A), and a non-phthalate ester plasticizer accounts for 80 to 100% by weight of the (C) component plasticizer.

There is provided a toner for developing a latent electrostatic image, obtained by a method containing: ejecting a toner composition fluid from an ejection hole so as to make the toner composition fluid into droplets; and solidifying the droplets in an atomizing space so as to form solid particles, wherein the toner composition fluid contains at least a colorant formed by reacting a polymer containing 10 mol % or more of a monomer unit having a sulfonic acid group or a salt thereof, or a monomer unit having a sulfuric acid group or a salt thereof as a constitutional unit, and a basic dye.

Solid phosphite compositions comprising tris(4-t-alkylphenyl)phosphites and selected hydroxyalkyl amines exhibit surprising performance compared with other phosphite stabilizers in the stabilization of polymers, such as polyolefins and the like, particularly in the prevention of color formation during high temperature processing or when exposed to certain gasses during storage, e.g., “gas fading”.

A liquid crystal panel of the present invention comprises at least: a liquid crystal cell comprising a liquid crystal layer containing a liquid crystal molecule that is oriented in homogeneous alignment with no electric field applied thereto; a first polarizer placed on one side of the liquid crystal cell; a first optical element placed between the liquid crystal cell and the first polarizer; and a second polarizer placed on the other side of the liquid crystal cell, wherein the first optical element is substantially optically isotropic, the liquid crystal cell has an initial alignment direction that is substantially parallel to the direction of an absorption axis of the first polarizer, and the absorption axis of the first polarizer is substantially perpendicular to an absorption axis of the second polarizer. The liquid crystal panel shows less discoloration of images even when the screen is viewed from oblique directions.

There are provided a photocurable composition capable of being readily cured by irradiation of ultraviolet rays and a cured product of the photocurable composition, as well as a coating composition and a coating film obtained from the coating composition. The cured product exhibits a high refractive index, a less discoloration and an excellent transparency. The present invention relates to a photocurable composition comprising (A) an episulfide compound containing a thiirane ring; and (B) a photo-base generator represented by the general formula (1): wherein Ar is phenyl, etc.; R is an alkyl group, etc.; —A+ is an ammonium ion; and X− is a borate anion, etc., and a coating composition comprising the photocurable composition and (C) a modified silicone oil, as well as a cured product and a coating film obtained from these compositions.

There is provided a coating composition having a good wetting property which is capable of forming a coating film exhibiting a high refractive index, a less discoloration, and excellent transparency and uniformity when polymerized and cured. The present invention relates to a coating composition comprising (A) 100 parts by weight of a thiirane ring-containing compound, (B) 0.0001 to 10 parts by weight of a catalyst for accelerating polymerization of the thiirane ring-containing compound, and (C) 0.005 to 4 parts by weight of a modified silicone oil; a coating film produced from the composition; and an optical product provided with the coating film.

An ink jet-printing medium comprising a substrate and an ink-receptive layer which has at least one layer and is formed on at least one major surface of the substrate, in which at least one layer of the ink-receptive layer contains fibrous fine powder as a pigment in an amount of at least 20% by weight of the total weight of the whole pigment contained in the layer which contains the fibrous fine powder. This medium can be produced at a low cost and has high printing quality while suppressing the discoloration or fading of the prints.

To provide a polyamide resin composition which inhibits generation of a gas, formation of decomposition products and discoloration of molded articles even under high molding temperature conditions, is excellent in incombustibility and toughness, and heat resistance in a reflow soldering step being required for surface mounting. The present invention provides a flame-retardant polyamide composition comprising 20 to 80% by mass of polyamide (A), 5 to 40% by mass of a flame retardant (B), 0.01 to 0.45% by mass of an antimony compound (C) and 0.5 to 10% by mass of a salt of zinc or calcium (D).

A liquid crystal panel of the present invention comprises at least: a liquid crystal cell comprising a liquid crystal layer containing a liquid crystal molecule that is oriented in homogeneous alignment with no electric field applied thereto; a first polarizer placed on one side of the liquid crystal cell; a first optical element placed between the liquid crystal cell and the first polarizer; and a second polarizer placed on the other side of the liquid crystal cell, wherein the first optical element is substantially optically isotropic, the liquid crystal cell has an initial alignment direction that is substantially parallel to the direction of an absorption axis of the first polarizer, and the absorption axis of the first polarizer is substantially perpendicular to an absorption axis of the second polarizer. The liquid crystal panel shows less discoloration of images even when the screen is viewed from oblique directions.

A foodstuff of a tablet or capsule, includes: an extract of a plant of genus Salacia; and at least one of calcium carbonate and silicon dioxide in an amount of 1% by mass or more based on the total mass of the tablet or capsule, wherein 50% inhibition concentration (IC50 value) of sucrase is 10 μg / ml or more and 300 μg / ml or less.

<Problem to be Solved> A process for producing a cyclic and / or linear phosphonitrilic acid ester from a cyclic and / or linear phosphonitrile dichloride is provided, wherein the reaction time is shorter and the content of monochloro phosphazenes is very small. <Solution> When phosphonitrile dichloride is reacted with a metal arylolate and / or a metal alcoholate in the presence of a reaction solvent, a metal arylolate and / or a metal alcoholate composed of at least two different metals having different ionization energies is used and also a specific compound is used as a catalyst.

Provided is a resin acid ester-based tackifier having a good compatibility with a synthetic rubber elastomer, being capable of reducing the melt viscosity of the elastomer, and being capable of imparting excellent adhesive properties and / or pressure-sensitive adhesive properties to the elastomer. The tackifier is composed of an ester composition characterized by(i) the ester composition comprising 70% by weight or more of a resin acid ester represented by the general formula (1):and(ii) the S′NMR / SNMR ratio of the ester composition being at least 6% in the 1H-NMR spectrum of the ester composition, wherein S′NMR is the total integral value of the proton signal(s) appearing in the region of 6 to 8 ppm and SNMR is the total integral value of all the proton signals appearing over the entire range of the 1H-NMR spectrum.

An adhesive tape includes a supporting body containing polyvinyl chloride and an adhesive layer containing a (meth)acrylic polymer, a rubber polymer, and tackifier resin. In the adhesive tape, the degree of polymerization of polyvinyl chloride is between 1250 and 1800 inclusive, and the (meth)acrylic polymer contains no nitrogen atoms. The (meth)acrylic polymer contains a structural unit derived from at least a type of monomer selected from the group consisting of methyl acrylate, ethyl acrylate, 2-ethylhexyl acrylate, butyl acrylate, 2-hydroxyethyl acrylate, methyl methacrylate, and 2-hydroxyethyl methacrylate.

Provided is a resin acid ester-based tackifier having a good compatibility with a synthetic rubber elastomer, being capable of reducing the melt viscosity of the elastomer, and being capable of imparting excellent adhesive properties and / or pressure-sensitive adhesive properties to the elastomer.

The present invention relates to the antioxidant compounds which are synthesized or derived from benzofuranone compound and benzoic acid compound. The antioxidant compound with remarkable heat resistance possesses carbon-centered radical quencher and primary antioxidant synergism. It can be use as additive for polymer to enhance its stability of melting flow and color.

The present invention provides methods for preparing an absorbent antimicrobial wound dressing which comprise steps of (a) preparing an antimicrobial coating composition by mixing an antimicrobial agent and one or more polymers in a solvent system that comprises a non-aqueous solvent, (b) contacting the antimicrobial coating composition of step (a) with a wound dressing substrate which comprises absorbent fibers or absorbent particles, and (c) drying the product of step (b). The present invention also provides absorbent antimicrobial wound dressings including those prepared by these methods as well as antimicrobial coating compositions and methods of producing antimicrobial coating compositions.

Provided is a quinacridone pigment composition for coloring plastics, particularly engineering plastics. The quinacridone pigment composition has high transparency and high color strength and also has high heat resistance, so that discoloration during molding of a resin (a color change of a molded plate) is very small. Also provided are a masterbatch and a resin molded product that contain the pigment composition. The pigment composition for coloring resins contains a quinacridone pigment and a pigment that absorbs fluorescence in a wavelength range of 500 to 600 nm. The inventors have found that, when the pigment composition is used as a colorant of a resin molded product subjected to a high-temperature thermal history, the change in color, i.e., the discoloration, of the resin molded product obtained is very small. Thus, the present invention has been completed.

A mold release sheet for hot pressing which comprises a film made of a heat-resistant plastic, and a resin layer having a glass transition temperature (Tg) of -50 to 20°C and exhibiting good mold release property which is provided on at least one surface of the film. The sheet can be easily released from a film-adhered article without giving an damage to a substrate after hot pressing, causing the contamination such as adhesion of a resin, etc., and furthermore, without causing the lowering of the connection reliability due to discoloration of a gold-plated surface formed by the terminal plating.

There is provided a coating composition having a good wetting property which is capable of forming a coating film exhibiting a high refractive index, a less discoloration, and excellent transparency and uniformity when polymerized and cured. The present invention relates to a coating composition comprising (A) 100 parts by weight of a thiirane ring-containing compound, (B) 0.0001 to 10 parts by weight of a catalyst for accelerating polymerization of the thiirane ring-containing compound, and (C) 0.005 to 4 parts by weight of a modified silicone oil; a coating film produced from the composition; and an optical product provided with the coating film.

An addition-curable silicone composition comprising a phenyl group and capable of obtaining a cured product excellent in heat resistance, with little weight change and little discoloration at high temperatures. The addition-curable silicone composition of the present invention comprises the following components: (A-1) branched organopolysiloxane represented by formula (1); (A-2) linear organopolysiloxane represented by formula (2) Organopolysiloxanes, (B) organohydrogenpolysiloxanes, which have at least 2 or more hydrogen atoms bonded to silicon atoms in one molecule; (C) polyorganometallic siloxanes, containing Si‑O -Ce bond and Si-O-Ti bond, the Ce content is 50-5000ppm, the Ti content is 50-5000ppm, the viscosity at 25°C is 10-10000mPa·s, relative to the total number of organic groups contained in one molecule, having at least 10 mole percent aryl groups; and (D) a hydrosilylation catalyst comprising a platinum group metal.

The present invention relates to a copper ion-modified tungsten oxide photocatalyst subjected to chemical etching treatment with a basic aqueous solution in which a rate of change in diffuse reflectance of the photocatalyst as measured at a wavelength of 700 nm between before and after irradiated with an ultraviolet light in atmospheric air is less than 10%; and a process for producing a copper ion-modified tungsten oxide photocatalyst which includes a copper ion modifying step of modifying a tungsten oxide powder with a copper ion; a chemical etching step of subjecting the tungsten oxide powder to chemical etching treatment with a basic aqueous solution, the chemical etching treatment being carried out either before or after the copper ion modifying step; and a drying step of drying the product obtained after the above steps at a temperature of 200° C. or lower.

Provided are a silver product which has high hardness (HV), rarely undergoes metal corrosion, rarely undergoes discoloration, and is produced by using pure silver and an ultra-high purity silver alloy, and a method for producing the silver product. The silver product is characterized by being composed of pure silver or a silver alloy having a purity of 99.9 wt% or more and has a Vickers hardness of 60 HV or more, and the value of h2 / h1 is 0.2 or more, where h1 is the height of a peak having a 2 [theta] of 38 degrees minus or plus 0.2 degrees in an X-ray diffraction pattern obtained by XRD analysis of the silver product, and h2 is the height of a peak having a 2 [theta] of 44 degrees minus or plus 0.4 degrees.

The present invention relates to a polycarbonate resin composition. According to the present invention, a polycarbonate resin composition, which realizes a high whiteness degree, exhibits less discoloration due to superior heat stability during storage and processing, and has improved fluidity, laser reactivity, and plating adhesion, and a method of preparing the same are provided.

Described is a method for preparing a purified liquid containing carbohydrates. The method comprises the steps of: hydrolysing starch to a dextrose equivalent (DE) of 10 or above, thus obtaining a liquid of carbohydrates; removing a heavy weight sludge fraction from the light weight liquid of carbohydrates using centrifugation; filtering the remaining liquid of carbohydrates, the filter being capable of retaining coarser particles while allowing particles with a diameter less than 2 μm to pass; performing membrane separation on the filtered liquid of carbohydrates using a membrane having a pore size at 2 μm or below; and recovering a permeate stream of purified liquid containing carbohydrates. Also disclosed in a plant for performing the method.

Described is a method for preparing a purified liquid containing carbohydrates. The method comprises the steps of: hydrolysing starch to a dextrose equivalent (DE) of 10 or above, thus obtaining a liquid of carbohydrates; removing a heavy weight sludge fraction from the light weight liquid of carbohydrates using centrifugation; filtering the remaining liquid of carbohydrates, the filter being capable of retaining coarser particles while allowing particles with a diameter less than 2 μm to pass; performing membrane separation on the filtered liquid of carbohydrates using a membrane having a pore size at 2 μm or below; and recovering a permeate stream of purified liquid containing carbohydrates. Also disclosed in a plant for performing the method.

Provided is a quinacridone pigment composition for coloring plastics, particularly engineering plastics. The quinacridone pigment composition has high transparency and high color strength and also has high heat resistance, so that discoloration during molding of a resin (a color change of a molded plate) is very small. Also provided are a masterbatch and a resin molded product that contain the pigment composition. The pigment composition for coloring resins contains a quinacridone pigment and a pigment that absorbs fluorescence in a wavelength range of 500 to 600 nm. The inventors have found that, when the pigment composition is used as a colorant of a resin molded product subjected to a high-temperature thermal history, the change in color, i.e., the discoloration, of the resin molded product obtained is very small. Thus, the present invention has been completed.

A foodstuff of a tablet or capsule, includes: an extract of a plant of genus Salacia; and at least one of calcium carbonate and silicon dioxide in an amount of 1% by mass or more based on the total mass of the tablet or capsule, wherein 50% inhibition concentration (IC50 value) of sucrase is 10 μg / ml or more and 300 μg / ml or less.