Showing papers on "Chemical resistance published in 2004"

Ultraviolet cured paint

Abstract: The ultraviolet ray cured paint consists of low functionality degree monomer, low functionality degree pre-polymer, assistant, light initiator and mixed solvent, as well as high functionality degree monomer and high functionality degree pre-polymer The ultraviolet ray cured paint contains various monomer and pre-polymer of different functionality degrees and gradient functionality degree design, and may be sprayed onto cellphone casing to form coating with greatly raised surface hardness, high wear resistance and high chemical resistance

Polyvinyl alcohol fibers, and nonwoven fabric comprising them

Abstract: Readily-fibrillable fibers of PVA polymer, having good chemical resistance, hydrophilicity, weather resistance and water resistance have a flattened cross-sectional profile and have a mean thickness D (μm) that satisfies the following formula (1): 0.4≦D≦5 (1) wherein D=S/L; S indicates the cross-section area (μm2) of the fibers; and L indicates the length (μm) of the major side of the cross section of the fibers. The fibers can be used for making nonwoven fabrics.

Fluorine-containing aqueous coating composition

Abstract: A fluorine-containing aqueous coating composition composed of (A) an aqueous emulsion of a functional group-containing fluororesin obtained by dispersing, in water, a fluoroolefin copolymer having a functional group that is obtained through solution polymerization and (B) a water-dispersible unblocked isocyanate compound is disclosed. The fluororesin aqueous coating composition can be cured at ordinary temperature, and a coating formed therefrom is excellent in chemical resistance, water resistance, solvent resistance, contamination resistance, hardness, weathering resistance and durability.

Thermosetting resin composition, and prepreg, metal-laminated lamination plate and printed wire board using the same

Abstract: PROBLEM TO BE SOLVED: To provide a printed wire board material which is excellent in dielectric characteristics, heat resistance, moisture resistance, electric corrosion resistance, adhesiveness, mechanical properties, and chemical resistance, and exhibits an excellent flame retardancy without using a halogen flame retardant. SOLUTION: The subject thermosetting resin composition contains (A) a copolymerization resin exemplified by the formula having a specified repeating unit, (B) a cyanate compound having two or more cyanato groups in the molecule, and (C) at least one kind of phosphoric flame retardant selected from the group consisting of phosphazene compounds and disubstituted phosphinic acid metal salts. COPYRIGHT: (C)2005,JPO&NCIPI

Surface-coated sealing material

Abstract: The present invention relates to a surface coated sealing material and provides a sealing material that enhances chemical resistance, plasma resistance, and non-sticking while keeping strength, hardness, and sealing property of a rubber substrate. It is a sealing material that comprises a coating film comprising one kind or more of metal or metallic compound selected from the group of metals, metal oxides, metal nitrides, metal carbides and compounds thereof on the whole or a part of the surface of the substrate which comprises a soft material of Shore D hardness of at most 75 and Shore A hardness of 40 to 100.

Multifunctional material having carbon-doped titanium oxide layer

Abstract: A multi-functional material having a carbon doped titanium oxide layer which contains the carbon being doped in the state of a Ti-C bond, and is excellent in durability (high hardness, scratch resistance, abrasion resistance, chemical resistance, heat resistance) and also functions as a photocatalyst being responsive to a visible light; and a method for producing the multi-functional material, which comprises subjecting the surface of a substrate at least the surface layer of which comprises titanium, a titanium alloy, a titanium alloy oxide or a titanium oxide to a heat treatment in an atmosphere of a combustion gas from a gas containing a hydrocarbon as a primary component or an atmosphere of a gas containing a hydrocarbon as a primary component, so as for the surface to have a temperature of 900 to 1500°C, or exposing said surface of the substrate directly to a combustion flame from a gas containing a hydrocarbon as a primary component to treat the surface with heat so as for the surface to have a temperature of 900 to 1500°C.

Thermosetting resin composition and hardened film

Abstract: PROBLEM TO BE SOLVED: To prepare a hardened film excellent in solvent resistance, acid resistance, chemical resistance such as resistance to alkalis, water resistance, thermal resistance, adhesion to substrates such as glass, transparency, scratch resistance, coating property, flatness, resistance to light, and excellent in properties related to foreign matters, and to obtain a thermosetting resin composition giving the hardened film. SOLUTION: The resin composition comprising a polyester amic acid obtained by reacting a tetracarboxylic acid dianhydride, a diamine and a polyhydroxy compound as indispensable components, an epoxy resin, a hardener for the epoxy resin and a solvent, wherein the composition comprises 20-400 pts.wt. of the epoxy resin per 100 pts.wt. of the polyester amic acid, and 15-60 pts.wt. of the epoxy hardener per 100 pts.wt. of the epoxy resin. COPYRIGHT: (C)2005,JPO&NCIPI

Method for producing substrate having carbon-doped titanium oxide layer

Abstract: A method for producing a substrate having a carbon-doped titanium oxide layer, which comprises subjecting the surface of a substrate at least the surface layer of which comprises titanium, a titanium alloy, a titanium alloy oxide or a titanium oxide to a heat treatment in an atmosphere of a combustion gas from a gas containing a hydrocarbon as a primary component or an atmosphere of a gas containing a hydrocarbon as a primary component, so as for the surface to have a temperature of 900 to 1500°C, or exposing said surface of the substrate directly to a combustion flame from a gas containing a hydrocarbon as a primary component to treat the surface with heat so as for the surface to have a temperature of 900 to 1500°C, thereby forming a carbon-doped titanium oxide. A substrate having a carbon-doped titanium oxide layer produced by the above method is excellent in durability (high hardness, scratch resistance, abrasion resistance, chemical resistance, heat resistance) and also can be used as a photocatalyst being responsive to a visible light.

Chemical Resistance of Ceramic Materials in Acids and Alkalis

Abstract: A method for determining the acid and alkali resistance of ceramic materials has been developed and certified. Numerical values of acid and alkali resistance of different materials and powders has been determined using a unified method. The possibility of designing chemically resistant ceramic materials with prescribed numerical values of acid an alkali resistance is demonstrated.

Curable surface modifier and curable composition for surface modification comprising the same

Abstract: There is provided a curable surface modifier comprising a resin which is soluble in a general purpose solvent and comprises a fluorine-containing ethylenic polymer containing, in at least a part of its side chain, a moiety A having a long polyfluoropolyether chain and/or a moiety B having a self-crosslinkable functional group, in which the resin contains both of the moieties A and B. The curable surface modifier improves properties of surfaces of various coating films, especially antireflection films, such as surface sliding property (decrease in a friction coefficient), surface hardness, abrasion resistance, chemical resistance and stain removability by wiping, thus being capable of imparting modified properties to the surfaces of original coating films.

Polyester molding composition and process for its preparartion

Abstract: A novel process produces a novel polyester resin composition comprised of modified polyester having increased acid end groups that are chemically reacted with a polyfunctional carboxy reactive material. The resulting polyester has enhanced chemical resistance and/or improved melt viscosity. Blends of the modified polyester with polycarbonate can be made and are characterized by improved chemical resistance and/or melt viscosity.

Stain resistant coating compositions, methods of coating and coated articles

Abstract: A nonstaining coating composition which comprises as essential components (A) a specific aliphatic sulfonic acid compound or amine salt thereof, (B) a compound having per molecule at least one functional group selected among carboxly, a carboxly anhydride group, and a carboxyl group blocked with an alkyl vinyl ether, (C) a specific organosilicate and/or a condensate thereof, and (D) a resin having epoxy groups and/or alkoxysilyl groups in the molecule; and a method of finish coating. They give a cured coating film which has nonstaining properties based on a high degree of hydrophilicity from immediately after the formation thereof and has satisfactory long-term weatherability, water resistance, and chemical resistance. The film can impart an excellent finish appearance to the article

Polyvinyl chloride glove having improved chemical resistance

Abstract: A glove having improved chemical permeation resistance includes a substrate body (26) formed from polyvinyl chloride and a barrier layer (32) overlying at least a portion of the substrate body (26), where the barrier layer (32) is formed from an acrylic polymer having a glass transition temperature of from about -30°C to about 30°C.

Polyamide resin composition and molded article of the same

Abstract: PROBLEM TO BE SOLVED: To provide a polyamide resin composition having an extremely excellent low outgassing property and excellent in mechanical properties such as tensile elongation and low water absorption, heat resistance, slidability and chemical resistance. SOLUTION: A polyamide resin composition comprises a dicarboxylic acid unit (a) containing 50 to 100 mol% of terephthalic acid units, 1,9-nonanediamine units and / or 2-methyl-1,8-octanediamine units. 100 parts by weight of a polyamide resin (I) composed of 60 to 100 mol% of a diamine unit (b) and using benzoic acid as a terminal blocking agent, and 0.01 to 0.01 of a metal oxide and / or a metal hydroxide And 10 parts by weight. [Selection] None

Coating containing acrylosilane polymer to improve mar and acid etch resistance

Abstract: The present invention relates to a coating composition particularly useful as a clear coating used over a pigmented base coat that has improved cure, which provides increased out of oven hardness, as well as improved mar and scratch resistance, and increased environmental chemical resistance. The composition is comprised of 40 - 70% by weight of film forming binder and 30 - 60% by weight of a volatile liquid carrier for the binder; wherein the binder contains a 25 - 98.5% by weight, based on the weight of the binder, of a silane polymer, 1 - 40% by weight, based on the weight of the binder, of an alkylated melamine crosslinking agent, 0.5 - 5% by weight, based upon the weight of the binder, of an aryl or alkyl acid phosphate curing agent, and 0 - 30% by weight, based upon the weight of the binder, of a non aqueous dispersed polymer, a urethane polymer, a polyester resin, an acrylic polyol resin, or any mixture thereof. The composition may be used, in particular, as a finish for automobiles and light trucks.

How to Design a Nano-Multilayered PVD Nitrides Based Coating Regarding its Resistance Against Oxidation and Aqueous Corrosion ?

Abstract: The machine industry is always looking for new tools, in order to open new markets such as high-rate metal forming in the automotive industry or machining innovative hard materials. To reach such challenges, tools have not only to fulfil high tribological characteristics, but also to resist against the degradations resulting from the medium. For several years the literature relates the efficiency of nanostructured coatings to improve the surface mechanical properties, but often without taking into account the environmental constraints. The objective of this work is to study the corrosion behaviour of coated M2 steel in a saline aggressive solution as well as in high temperature oxidation conditions. Coatings are fabricated by PVD arc evaporation or by magnetron sputtering. Superlattice coatings are composed of TiN and CrN successive layers of several nanometers in thickness (2DTiN/CrN). In order to determine a "nanostructure effect", multilayered deposits are systematically compared to both TiN and CrN monolayered references. The nature of the external layer, in contact with the aggressive medium, will be a key-parameter of prime importance. Under oxidation conditions in air at 700°C during 9 and 24 hours, TiN oxidises into a thick cracked rutile layer, while CrN is covered by a submicrometric dense chromia layer. In the same way, thermogravimetric experiments confirm the better protection afforded by CrN compared to TiN (kinetic reduction of one decade). Concerning nanostructured deposits, their performances are similar to CrN ones : similar low oxidation rate and close values of weight variation. Thus, CrN, acting as a chromia former material, fixes its high intrinsic refractory properties. The chemical nature of the external layer is, in the case of nanostratified TiN/CrN coatings, without any deleterious consequences : indeed, if TiN is deposited as a top layer, it is immediately corroded, and, as soon as the oxidation front reaches CrN, which is transformed into chromia, its progression towards the core of the part is greatly slowed down. When immersed in saline solution, cathodic PVD coatings (like TiN and CrN) often suffer from severe galvanic corrosion of the substrate through the defects of the deposit. However, in the case of a stratified structure, the open porosity is almost eliminated (porosity rate becomes lower than 0.01% !). Nevertheless, this outstanding covering ratio is not the only reason for the good electrochemical properties of multilayered deposits, since it has been shown that CrN spontaneously forms a thin efficient passive film on its top surface. From a wet corrosion point of view, the best characteristics are then obtained for a stratified coating having an external p-type semiconductive CrN layer.

Solid polyelectrolyte (composite) membrane containing phosphate group

Abstract: PROBLEM TO BE SOLVED: To provide a solid polyelectrolyte (composite) membrane which has a sufficiently high proton conductivity for use in a fuel cell and the like and is excellent in thermal resistance, chemical resistance and mechanical strength SOLUTION: The solid polyelectrolyte (composite) membrane contains a homogeneous composition comprising: a resin containing the phosphate group which is formed by copolymerizing (a) an unsaturated monomer (I) containing phosphate group which has an acidic phosphate group and an ethylenic unsaturated bond in the molecule, (b) an unsaturated monomer (II) containing the phosphate group which has an acidic phosphate group and two ethylenic unsaturated bonds in the molecule, and/or (c) an unsaturated monomer (III) containing the phosphate group which has an acidic phosphate group and three ethylenic unsaturated bonds in the molecule; and a polyamide resin The solid polyelectrolyte (composite) membrane has a remarkably high proton conductivity, low temperature dependence of the proton conductivity, and excellent thermal resistance, chemical resistance and mechanical strength COPYRIGHT: (C)2004,JPO

High-molecular weight epoxy resin composition, film obtained using the same and cured product of the same

Abstract: PROBLEM TO BE SOLVED: To provide a high-molecular weight epoxy resin composition which gives a cured product low elutable and excellent in chemical resistance, solvent resistance, heat resistance, moldability, flexibility, impact resistance, adhesion property and adhesive property, and an epoxy cured film using the resin composition. SOLUTION: The high-molecular weight epoxy resin composition comprises a high-molecular weight epoxy resin, which is obtained by reacting a bifunctional epoxy resin (X) with a dihydric phenolic compound (Y) in the presence of a catalyst and satisfies the requirements (a)-(d) below, and a curing agent reactive with the epoxy group. (a) A mass-average molecular weight of 30,000-200,000. (b) An epoxy equivalent of 5,000-20,000 g/equivalent. (c) A content of the residual bifunctional epoxy resin (X) of at most 1,000 ppm. (d) A content of the residual dihydric phenolic compound (Y) of at most 100 ppm. COPYRIGHT: (C)2006,JPO&NCIPI

Semi-aromatic polyamide-based porous membrane and its production method

Abstract: PROBLEM TO BE SOLVED: To provide a semi-aromatic polyamide based porous membrane excellent in a pure water permeation performance, a fractioning performance, strength, heat resistance, a low water absorption property and chemical resistance and further excellent in a process controlling property, a cost efficiency and a pore formation property, and to provide its production method. SOLUTION: The semi-aromatic polyamide based porous membrane comprises a membrane material containing partial aromatic polyamide as a main component and an average pore diameter of the membrane surface is within a range of 0.01-10 μm. The porous membrane has fine pores having an average pore diameter of 3 μm or more on the membrane surface and has a pure water permeation speed of 30,000 L/m 2 /hr/98kPa or more and a fraction particle diameter of 1 μm or more. Further, the porous membrane is formed by heat induction phase separation of the membrane material and a solvent. COPYRIGHT: (C)2005,JPO&NCIPI

Polycarbonate molding compositions with improved melt flow and chemical resistance

Abstract: A thermoplastic molding composition having improved melt flow and chemical resistance is disclosed. The composition contains A) at least one member selected from the group consisting of aromatic polycarbonate and polyester carbonate, B) a graft polymer of at least one vinyl monomer on at least one rubber having a glass transition temperature of 40° C. The composition may optionally further contain D) a phosphorus-based flame retardant and E) an anti-dripping agent.

Method for preparing acid resistant restoration mortar with chemical resistance and composition thereof

Abstract: PURPOSE: A method for preparing acid resistant restoration mortar and a composition thereof are provided to improve the chemical resistance as well as physical properties of a concrete construction which is restored with the composition, wherein the physical properties include compression and bend strength, waterproofness and saline water resistance, thereby improving the durability of the restored concrete construction. CONSTITUTION: The method for preparing acid resistant restoration mortar comprises: (1) a step of preparing an ultra-fine slag admixing powder of sludge from sewage comprised of: adding 5-10pts.wt of clay or pumice to 80-90pts.wt of sludge having 10% or less of a water content; firing the mixture in a rotary kiln at 1300-1500deg.C to give a sludge slag; adding thereto 1-5pts.wt of anhydrite; and milling the resulted product with a ball mill to have a fineness of 4000-8000cm2/g; and (2) a step of preparing acid resistant restoration mortar comprised of mixing 50-80pts.wt of the prepared slag admixture; 10-30pts.wt of Portland cement; 35-55pts.wt of an inorganic binder; 1-5pts.wt of an acrylic or styrene-butadiene copolymer resin composition; 0.1-0.5pts.wt of a lignosulfonate type or a sulfonated naphthalene formaldehyde condensate type surfactant; 0.01-0.03pts.wt of a thickener selected from methyl cellulose, ethyl cellulose or polysaccharide compound; 0.05-0.1pts.wt of polyethylene fiber; and 45-60pts.wt of silica fiber having 40-60pts.wt of 1Denier fiber and 40-60pts.wt of 2Denier fiber.

Polyvinyl alcohol fiber, and nonwoven fabric comprising the same

Abstract: PROBLEM TO BE SOLVED: To provide readily-fibrillable fibers of PVA polymer, having good chemical resistance, hydrophilicity, weatherability and water resistance. SOLUTION: The PVA fibers have a flattened cross-sectional profile and have a mean thickness D (μm) that satisfies the formula: 0.4≤D≤5 (wherein D=S/L; S indicates the cross-section area (mum 2 ) of the fibers; and L indicates the length (μm) of the major side of the cross section of the fibers). COPYRIGHT: (C)2005,JPO&NCIPI

High performance alkyd resin compositions for coating

Abstract: New modified alkyd varnishes were prepared by partial replacement of phthalic anhydride with methylene disalicylic acid. Incorporation of this phenolic derivative led to significant improvement in hardness, gloss, and alkali resistance performance.

Organic silicon compound and method for producing same, and polysiloxane and method for producing same

Abstract: A novel organic silicon compound and a polysiloxane are disclosed which are useful as an electronic material, optical material, coating material, sealing material, or catalyst support. Such organic silicon compound and polysiloxane can be used as an additive for improving various physical properties of a polymer material such as flame retardance, heat resistance, weather resistance, light resistance, electrical insulation, surface characteristics, hardness, mechanical strength, or chemical resistance. The organic silicon compound is represented by the formula (1) below, and the polysiloxane contains such an organic silicon compound as a monomer.

Fluoride polymer composition and inorganic nanoparticle

Abstract: PROBLEM TO BE SOLVED: To obtain a copolymer of a fluoride polymer, having, improved elastic modulus, storage elastic modulus G' and yield point at room temperature and >100°C, and having chemical resistance and heat resistance properties. SOLUTION: The polymer composition comprises (a) 90-99.9 wt.% fluoride polymer and uniformly dispersed (b) 0.1-10 wt.% flake inorganic particle having at least COPYRIGHT: (C)2004,JPO

Organic corrosion-proof coating for metal surfaces, e.g. in cars, aircraft, furniture, domestic appliances and door or window frames, shows a chemical resistance of more than 100 cycles in the MEK test

Abstract: Organic anti-corrosion coatings with a dry film thickness of 0.4-20 microns on a metallic substrate, in which the coating shows a chemical resistance of more than 100 MEK cycles as measured in the test with methyl ethyl ketone as described in ECCA Standard T11.

Composition for water-repellent low refractive index coating and optical article coated with the same composition

Abstract: PROBLEM TO BE SOLVED: To provide a composition for a water-repellent low refractive index coating for obtaining a transparent film having an arbitrary low refractive index, superior water repellency and antifouling property, and superior durability of wear resistance, chemical resistance, hot water resistance, heat resistance, and weatherability or the like can be provided SOLUTION: There is disclosed the composition for the water-repellent low refractive index coating consisting of oxide particulates containing silicon or one or more kinds of metals, a fluorine-containing organic silicon compound and an organic silicon compound, and its composition COPYRIGHT: (C)2004,JPO

Flame-retardant epoxy resin composition, and prepreg, laminate, copper-clad laminate and printed circuit board containing the same

Abstract: PROBLEM TO BE SOLVED: To obtain a flame-retardant epoxy resin composition which does not contain a halogen as a means for flame retardation, does not produce a poisonous gas when burnt, imparts excellent heat resistance, water resistance and chemical resistance to molded articles, and can form molded articles having excellent flame retardancy, soldering resistance, moisture resistance, tracking resistance, and the like. SOLUTION: The epoxy resin composition containing an epoxy resin (A) and a curing agent (B) as essential components is characterized by containing a phosphorus atom-containing polyester resin (C). COPYRIGHT: (C)2004,JPO