35results about How to "Little discoloration" patented technology

An epoxy resin composition comprising an epoxy resin, a hardening agent and a hardening accelerator as an indispensable ingredients is provided wherein the hardened resin has a high translucency and has little discoloration under high temperature and high humidity and is excellent at heat resistance and light fastness by compounding a phosphonium compound represented by the following formula (I) as a hardening accelerator.

A curable silicone composition comprises: (A) an organopolysiloxane represented by an average unit formula; (B) an organopolysiloxane having 10 or less silicon atoms, wherein 30 to 60 mole % of all silicon atom-bonded organic groups are alkenyl groups having from 2 to 6 carbons; (C) an organopolysiloxane represented by a general formula; (D) an organopolysiloxane having at least 2 silicon atom-bonded hydrogen atoms in a molecule, wherein the content of phenyl groups in all silicon atom-bonded organic groups in this component is 20 to 70 mole %; (E) an organopolysiloxane represented by an average unit formula; (F) a hydrosilylation reaction catalyst; (G) a white pigment; and (H) an inorganic filler other than a white pigment, has excellent formability for forming a cured product that has little discoloration and lowering of mechanical strength by heat and light, has high light reflectance, has excellent dimensional stability, and is capable of good attachment by a sealing agent used for an optical semiconductor device.

A dental polymerizable composition comprising (a) a fluorine compound comprising a chain polymer having a main chain comprising a monomer unit having a hydrophilic group, and terminal groups comprising a fluoroalkyl group at each of both ends of the main chain; (b) a polymerizable monomer; and (c) a polymerization initiator. The dental polymerizable composition can be suitably used, for example, for dental composite resins, such as dental composite filler materials, crowning materials, and bonding materials; dental adhesive agents, such as teeth-straightening adhesive agents, cavity-coating adhesive agents, and tooth fissure sealing materials; denture base materials, denture base mucosal adjusting materials, fissure sealants, coating agents applied to tooth surface or dental prosthetic, surface glazes, and the like, and especially for various coating applications, for example, a fissure sealant, a coating agent to tooth surface or dental prosthetic, surface stains or a surface glaze, a hypersensitive inhibitor, a dental manicure, or the like.

The invention provides a golf ball having a core and a cover of one or more layer, wherein at least one layer of the cover is made of a material obtained by molding a mixture composed of (a) 100 parts by weight of a base resin and (b) 1 to 40 parts by weight of a saturated branched-chain fatty acid or a derivative thereof. The golf ball has a soft, pleasant feel on impact and excellent scuff resistance while retaining a good flight performance. Moreover, it exhibits a highly white appearance that undergoes little discoloration.

The single-layered structure of the invention comprises (A) 50 to 97% by weight of a polyolefin, (B) 2 to 45% by weight of a polyamide resin comprising a diamine component and a dicarboxylic acid component and (C) 1 to 45% by weight of a modified polyolefin and / or styrene copolymer. The polyamide resin B is dispersed in layers throughout the single-layered structure. With such a dispersion state of the polyamide resin B, the single-layered structure exhibits excellent fuel barrier properties.

The invention discloses a process for vacuum freeze drying of roses. The process comprises the following steps of S1, picking and treating the roses; S2, treating the roses with a color-retaining solution; S3, freeze-drying the roses; S4, drying the roses by gradient heating; and S5, performing low-temperature condensation and collection on rose hydrolat. The process for vacuum freeze drying of the roses has the beneficial effects that the color-retaining solution is utilized and atomized, so that collection and utilization of the roses are realized; the stability of petal cells is kept by utilizing simmondsia chinensi oil, tartaric acid and apricot kernel oil, and meanwhile, the oxidation resistance of the simmondsia chinensi oil, tartaric acid and apricot kernel oil is combined and superposed to stabilize the overall color of petals, so that sufficient drying is realized; collection and utilization are realized by utilizing three-stage heating; collection and utilization are achievedby limiting low-temperature condensation and collection conditions; sufficient drying is realized by atomizing the color-retaining solution; and sufficient drying is achieved by standing for 35 min.

An epoxy / silicone hybrid resin composition is provided comprising (A) an organosilicon compound having at least one silicon-bonded hydroxyl group, (B) a modified epoxy resin which is free of a phenylene ether skeleton and has reactive hydroxyl groups wherein some or all of the hydrogen atoms of the reactive hydroxyl groups are substituted by monovalent hydrocarbon groups or silyl groups, and (C) an aluminum base curing catalyst. The compatibility between silicone and epoxy resins is improved without a need for compatibilizing agent.

A photocatalytic titanium oxide sol presents antibacterial properties in a dark place, and, in particular, relates to a photocatalytic titanium oxide sol which is stable and causes no discoloration by light even though containing silver, and relates to a coating composition and a member using the same. The photocatalytic titanium oxide sol includes silver, copper and a quaternary ammonium hydroxide, may be dispersed in a binder, and may be coated on the surface of a substrate.

A curable silicone composition comprises: (A) an organopolysiloxane represented by an average unit formula; (B) an organopolysiloxane having 10 or less silicon atoms, wherein 30 to 60 mole % of all silicon atom-bonded organic groups are alkenyl groups having from 2 to 6 carbons; (C) an organopolysiloxane represented by a general formula; (D) an organopolysiloxane having at least 2 silicon atom-bonded hydrogen atoms in a molecule, wherein the content of phenyl groups in all silicon atom-bonded organic groups in this component is at least 20 mole %; (E) an organopolysiloxane having at least 2 silicon atom-bonded hydrogen atoms in a molecule, wherein the content of phenyl groups in all silicon atom-bonded organic groups in this component is less than 20 mole %; (F) a hydrosilylation reaction catalyst; (G) a white pigment; and (H) an inorganic filler other than a white pigment, has excellent formability for forming a cured product that has little discoloration and lowering of mechanical strength by heat and light, has high light reflectance, has excellent dimensional stability, and is capable of good attachment by a sealing agent used for an optical semiconductor device.

A process for producing an aliphatic polyester through ring-opening polymerization of a cyclic ester, wherein a partial polymer in a molten state is continuously introduced into a twin-screw stirring device to continuously obtain a partial polymer in a solid pulverized state, the partial polymer is subjected to solid-phase polymerization, and the resultant polymer is melt-kneaded together with a thermal stabilizer to be formed into pellets. As a result, an aliphatic polyester of a high molecular weight and with little discoloration is produced efficiently.

A curable silicone composition comprises: (A) an organopolysiloxane represented by an average unit formula; (B) an organopolysiloxane having 10 or less silicon atoms, wherein 30 to 60 mole % of all silicon atom-bonded organic groups are alkenyl groups having from 2 to 6 carbons; (C) an organopolysiloxane represented by a general formula; (D) an organopolysiloxane having at least 2 silicon atom-bonded hydrogen atoms in a molecule, wherein the content of phenyl groups in all silicon atom-bonded organic groups in this component is 20 to 70 mole %; (E) an organopolysiloxane represented by an average unit formula; (F) a hydrosilylation reaction catalyst; (G) a white pigment; and (H) an inorganic filler other than a white pigment, has excellent formability for forming a cured product that has little discoloration and lowering of mechanical strength by heat and light, has high light reflectance, has excellent dimensional stability, and is capable of good attachment by a sealing agent used for an optical semiconductor device.

The present invention provides a method of producing a fluoropolymer, wherein polymerization using a carboxylate ester bond-containing carboxylic acid derivative as a surfactant in an aqueous medium to give the fluoropolymer is conducted, the above carboxylate ester bond-containing carboxylic acid derivative has a carboxylate ester bond and —COOM (M representing H, NH4, Li, Na or K), the above carboxylate ester bond may optionally be substituted by fluorine atom.

The invention relates to a method for preparing an anatase nano Ag / TiO2 composite material, which comprises the steps of: adding AgNO3 in stronger ammonia water, sealing a cup opening by using a preservative film, heating and stirring on a magnetic stirrer to ensure that the AgNO3 is fully dissolved, then adding C16H36O4Ti, and continuously stirring and heating to ensure that a solution gradually changes into an opaque milky solution; continuously stirring and heating until the solution is dried up to obtain white solid; and placing the white solid together with a beaker into a drying oven to be dried, and grinding into powder; and sintering the powder in a muffle furnace to obtain an anatase nano TiO2 crystal. Silver is loaded in a nano TiO2 solution, and is mixed more uniformly compared with the traditional method; a contact area of the silver and titanium dioxide is larger compared with the traditional method, the silver loading is not only carried out on the surface but also carried out in all nano titanium dioxide particles so that the oxidization discoloration degree of the silver is lowered, therefore, the method is very beneficial to the obtaining of the nano Ag / TiO2 withvery uniform dispersion of the silver, lower decoloration degree and strong catalysis activity and sterilizing property.

Disclosed is a fluorine-containing resin film which is formed from a fluorine-containing resin composition and has a thickness of 10 to 50 μm, wherein the fluorine-containing resin composition is prepared by adding 10 to 30 parts by mass of titanium oxide or a composite-oxide-type inorganic pigment to 100 parts by mass of a resin component comprising 60 to 95 parts by mass of a vinylidene fluoride resin and 5 to 40 parts by mass of a methacrylic acid ester resin, and wherein the peak intensity ratio of a II-type crystal, which is expressed by (A) / ((A)+(B))×100 wherein A represents the peak height at 840 cm−1 and B represents the peak height at 765 cm−1 in a measurement chart produced by an infrared absorption spectrum, is 60% or more and the total crystallinity is 30% or more as calculated from an X-ray diffraction profile.

Disclosed is a fluorine-containing resin film which is formed from a fluorine-containing resin composition and has a thickness of 10 to 50 μm, wherein the fluorine-containing resin composition is prepared by adding 10 to 30 parts by mass of titanium oxide or a composite-oxide-type inorganic pigment to 100 parts by mass of a resin component comprising 60 to 95 parts by mass of a vinylidene fluoride resin and 5 to 40 parts by mass of a methacrylic acid ester resin, and wherein the peak intensity ratio of a II-type crystal, which is expressed by (A) / ((A)+(B))×100 wherein A represents the peak height at 840 cm−1 and B represents the peak height at 765 cm−1 in a measurement chart produced by an infrared absorption spectrum, is 60% or more and the total crystallinity is 30% or more as calculated from an X-ray diffraction profile.

The invention discloses a process for vacuum freeze-drying roses, which comprises the following steps: S1 picking and processing roses; S2 treating roses with a color-preserving solution; S3 freeze-drying roses; S4 gradient heating and drying roses; dew; the beneficial effect of the present invention is: utilize color retention liquid and atomize color retention liquid, realize the collection and utilization of rose; Utilize jojoba oil, tartaric acid and almond oil, keep the stability of petal cell, simultaneously the three Combination and superposition of anti-oxidation properties stabilize the overall color of the petals and achieve full drying; use the three-stage temperature rise to realize collection and utilization; realize collection and utilization by limiting the conditions of low-temperature condensation collection; realize full drying by atomizing the color-preserving liquid; Let stand for 35 minutes to achieve full drying.

The invention provides a phenolic resin for abrasive paper, a preparation method of the phenolic resin and a compound glue for the abrasive paper. The phenolic resin comprises a first component and asecond component, the preparation method of the first component comprises the following steps: reacting phenol with an aldehyde in a nitrogen atmosphere at 80-90 DEG C for 1-3 hours under the action of an inorganic base catalyst to obtain a system A; adding a phenol into the system A, and reacting at 80-100 DEG C for 1-2 hours to obtain a system B; adjusting the temperature of the system B to 60-70 DEG C, adding an amino compound, and dehydrating to a preset viscosity to obtain the first component; the preparation method of the second component comprises the following steps: dissolving an organic acid in water and ethanol to obtain the second component; wherein the mass ratio of the first component to the second component is 1: (0.01-0.1). The phenolic resin is light in discoloration in the storage process, and the obtained abrasive paper is higher in abrasive resistance.