Showing papers on "Chemical resistance published in 1997"

Non-alkali glass and its production

Abstract: PROBLEM TO BE SOLVED: To eliminate foam as display defect and to improve fining property, heat resistance and chemical resistance by adding SnO2 in a specific glass raw material mixture as a fining agent and forming after fusing. SOLUTION: The glass raw material mixture is obtained by mixing 40-70wt.% (hereafter called %) SiO2 , 6-25% Al2 O3 , 5-20% B2 O3 , 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO and 0-10% ZnO. To the mixture, 0.05-2.0% SnO2 is added as the fining agent and after fused, formed into a prescribed shape.

Aqueous polyester resin dispersion and production thereof

Abstract: PROBLEM TO BE SOLVED: To provide an aqueous polyester resin dispersion which comprises a polyester resin (A), a basic compound (B), an amphiphilic organic solvent (C) and a compound (D) having a protective colloidal effect, and which has excellent film processability, water resistance, corrosion resistance, chemical resistance, weatherability and adhesive properties and also excellent storability even at a high solid concentration realized by homogeneously dispersing fine particles of the component (A) in an aqueous medium. SOLUTION: The component A substantially comprises a polybasic acid (such as terephthalic acid) and a polyhydric alcohol (such as ethylene glycol) and has an acid value of 10 to 40mgKOH/g and a weight-average molecular weight of at least 9,000 or a relative viscosity of at least 1.20. In the particle size distribution of the component A after the dispersion, the median diameter based on the volume is 2μm or smaller and the maximum particle size is not larger then 10μm. The component B is, for example, N,N-dimethylethanolamine. The component C effective in plasticizing the component A is, for example, ethylene glycol n-butyl ether. The component D is, for example, a polyvinyl alcohol.

Polyester resin aqueous dispersion and process for preparing the same

Abstract: A polyester resin aqueous dispersion which provides a coating film having excellent processability, water resistance, corrosion resistance, chemical resistance, weather resistance and adhesion to various substrates, and which also has markedly excellent storage stability even at a high solids concentration. The polyester resin aqueous dispersion substantially comprises a specific polyester resin, a basic compound, an amphipathic organic solvent capable of plasticizing the polyester resin, and a compound having a protective colloid action. Furthermore, fine particles of the polyester resin are homogeneously dispersed in an aqueous medium and in a specific dispersed state.

Thermosetting resin composition

Abstract: PROBLEM TO BE SOLVED: To provide a cured film excellent in transparency, heat resistance, chemical resistance, surface smoothness, tight adhesion, and sputtering resistance, and to provide a resin composition giving the cured film SOLUTION: The composition comprises: a polyamic acid which is a product of the reaction of a tetracarboxylic dianhydride, a diamine, and an aminosilicon compound; an epoxy resin; an epoxy hardener; and a solvent The amount of the epoxy resin is 50-250 ptswt per 100 ptswt the polyamic acid, while that of the epoxy hardener is 1-80 ptswt per 100 ptswt the epoxy resin

Laminate containing a layer composed of polyphenylene sulfide blended with other polymers

Abstract: Multilayered moldings, which comprise a laminate structure of (A) a layer of a polyphenylene sulfide resin (hereinafter referred to as PPS resin) composition and (B) a layer of a thermoplastic resin except PPS resins and which are characterized in that the PPS resin composition constituting the layer (A) comprises (A1) 100 parts by weight of a PPS resin, (A2) from 1 to 80 parts by weight of a thermoplastic resin having at least one functional group selected from epoxy groups, acid anhydride groups, carboxyl group and its salts, and carboxylate groups, and (A3) from 5 to 80 parts by weight of a thermoplastic resin that is similar in kind to the thermoplastic resin constituting the layer (B), have good hot water resistance, antifreeze resistance, chemical resistance, heat resistance, abrasion resistance, gas permeation resistance and interlayer adhesion.

Thermo and active energy ray curable resin composition used for protecting layer of transfer material transfer material surface protecting material and process for producing molded article excellent in abrasion resistance and chemical resistance

Abstract: The sheet material of the present invention has a protecting layer which comprises a heat reactant of a heat and active energy ray curable resin composition comprising as an active ingredient a polyfunctional isocyanate and a polymer having a (meth)acryl equivalent weight from 100 to 300 g/eq, a hydroxyl value from 20 to 500 and a weight-average molecular weight from 5000 to 50000 And, this protecting layer applied to the surface of a molded article is cured by active energy ray irradiation Therefore, a molded article excellent in abrasion resistance and chemical resistance can be obtained, and cracking is not caused in the curved part of the molded article Further, since the protecting layer is cured in part by heat in sheet material production, a large scale active energy ray irradiation apparatus is not required in active energy ray irradiation to realize low cost

Chlorine-containing polyethylene-and polyether-based elastomers stabilized with barium sulfate

Abstract: Chlorine-containing polyethylene- and polyether-based elastomer compositions having excellent heat resistance and chemical resistance, which are heat stabilized with from about 1 to about 25 parts per hundred weight of the elastomer of barium sulfate, and high temperature and chemical resistant molded and extruded products including automotive hose and cable jacketing incorporating such elastomer compositions.

Aqueous coating composition for the manufacture of precoated metal

Abstract: An aqueous coating composition for the manufacture of precoated metal is based on an aqueous resin having a carboxyl group in a molecule and neutralizable with a basic material as a binder, the aqueous resin being selected from an acrylic copolymer resin, polyester resin, and polyurethane resin. A mono- or poly-carbodiimide compound is blended with the aqueous resin. The composition forms a coating having improved chemical resistance, water resistance, and adhesion to sheet metal.

Active energy ray hardening resin composition used for transfer material and protective layer for transfer material and manufacture of molded product of superior wear resistance and chemical resistance using transfer material

Abstract: PROBLEM TO BE SOLVED: To manufacture a molded product of superior wear resistance and chemical resistance at low cost and eliminate the generation of cracks by containing a polymer having acryl equivalent, hydroxyl value and weight average molecular weight in the specified range and multifunctional isocyanate in an active energy ray hardening resin composition. SOLUTION: A protective layer 2 is released from a base sheet 1 or a release layer to form an outermost layer of a transfer material when the base sheet 1 is released after transfer or molding simultaneous transfer, and a molded product and back layer 3 are protected from chemicals and friction. For the purpose of forming the protective layer 2, an active energy ray hardening resin composition containing a polymer having the acryl equivalent amount of 100-300g/eq, hydroxyl value of 20-500 and weight average molecular weight of 5000-50000 and multifunctional isocyanate as effective components is used. A molded product of superior wear resistance and chemical resistance can be provided by the arrangement, and cracks are not generated on the curved face sections of the molded product.

Preolymerizing epoxy resin, functionalized rubber with filler to form adhesive

Abstract: An adhesive for a flexible printed circuit board and the method of preparing the same where the adhesive displays excellent migration inhibition, moisture adsorption resistance, and superior peeling strength, heat resistance, solvent resistance, chemical resistance, flexibility, and electrical properties. The adhesive is prepared by pre-polymerizing an epoxy resin, a COOH-containing rubber, a filler, and a primary catalyst in a solvent using a tertiary amine as a primary catalyst to form a prepolymer, followed by curing the prepolymer using a curing agent and a curing catalyst. The adhesive is coated on a plastic film, dried and laminated with a copper foil and then cured at an elevated temperature to form a substrate.

Precoating of aluminium and stainless steel sheets

Abstract: of EP0792908An aqueous coating composition for the manufacture of precoated metal is based on an aqueous resin having a carboxyl group in a molecule and neutralizable with a basic material, the aqueous resin being selected from an acrylic copolymer resin, polyester resin, and polyurethane resin. A mono- or poly-carbodiimide compound is blended with the aqueous resin. The composition forms a coating having improved chemical resistance, water resistance, and adhesion to sheet metal.

Biosoluble pot and marble-derived fiberglass

Abstract: Glass compositions suitable for pot and marble fiberization display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glasses have a difference between HTV (10 3 poise) and liquidus greater than 500° F., and a biodissolution greater than about 350 ng/cm 2 /hr.

Preparation and evaluation of some polymeric basalt composites

Abstract: Unsaturated polyester based on poly(ethylene, 1,2, propylene ma-leate-phthalate-adipate) was synthesized and used with the styrene monomer as a binder to produce polymeric basalt composites (PBC). The physical properties of the styrenated polyester resin (SP) were determined. Because the aggregate type and composition do affect the durability properties of the composites, the minerological, textural, and chemical composition of the basalt Filler were studied. The mix design for the PBC systems was optimized for workability, strength, and economy. The optimum composition was 10wt% resin and 90wt% oven-dried basalt. The mechanical and durability properties of the prepared PBC have been investigated. The physical, mechanical, and thermal properties of the composites appear to be satisfactorily good. Excellent chemical resistance to most chemical environments was also noted. The dielectric constant (∊′) values indicated that the use of basalt as a filler enhances the electrical characteristics of the...

Cleaning coating composition

Abstract: PROBLEM TO BE SOLVED: To obtain a cleaning coating film which can form a high-hardness coating film having a large surface area, noncombustibility, being excellent in weathering resistance, water resistance, chemical resistance, heat resistance, staining resistance, impact resistance and corrosion-resistance, being water- impermeable but air-permeable, having good humidity conditioning properties, having antibacterial properties, antimold properties, self-cleaning properties and can remove all of the odorants, nitrogen oxides, sulfur oxides and waste gases, etc., for a long term by applying a composition to the surface of a substrate and drying and curing the applied composition at ordinary temperature or by heating to low temperatures. SOLUTION: This composition mainly consists of 3-15 pts.wt. (in terms of the SiO 2 ) aminesilicate (a), 0.5-8 pts.wt. synthetic resin (b), 0.002-2 pts.wt. (in terms of the silver or copper atoms) or 3-25 pts.wt. (in terms of the titanium oxide) at least one member (c) selected from the group consisting of silver, copper and microparticulate titanium oxide, 15-75 pts.wt. water-insoluble inorganic filler having a mean particle diameter or a mean length of 0.01-50 μm and 15-75 pts.wt. water and/or hydrophilic organic solvent (e) (the total of components (a) to (e) is 100 pts.wt.). COPYRIGHT: (C)1998,JPO

Composite material with design properties maintained

Abstract: PROBLEM TO BE SOLVED: To provide a composite material which is prepared by applying to a base a material constituted of a fluorine-containing polymer excellent in the adhesion to the base and has the design properties of the ground maintained, without necessitating complicated processes, and to provide the composite material which is excellent in weather resistance, non-tackiness, stainproof properties, water repellency, chemical resistance and sliding properties and has the design properties of the ground maintained. SOLUTION: This composite material is prepared by a method wherein a material constituted of a functional-group-containing and fluorine-containing ethylene polymer which is prepared by copolymerization of (a) at least one kind of monomer of 0.05-30 mol.% out of functional-group-containing and fluoride-containing ethylene monomers each having at least one kind of functional group selected from the group comprising a hydroxyl group, a carboxyl group, a carboxylic acid salt, a carboxyester group and an epoxy group and (b) at least one kind of monomer of 70-99.95 mol.% out of fluorine-containing ethylene monomers not having the aforesaid functional group and which has the functional group is applied to a base.

Water-based coating composition capable of forming nitrogen oxide decomposing coating film

Abstract: PROBLEM TO BE SOLVED: To obtain a coating material which can form a coating film which is not deteriorated by the oxidation action of the constituent powder and is excellent in oxidation resistance, weathering resistance, chemical resistance, long-term use resistance, staining resistance and the property of decomposing nitrogen oxides by dispersing at least one photocatalytically active powder selected among titanium dioxide and zinc oxide powders in a water-soluble silicate coating binder. SOLUTION: The water-soluble silicate coating binder mainly consists of a water-soluble silicate (a) and a curing agent (b). Components (a) is exemplified by a modified water-soluble silicate obtained by reacting an alkali metal silicate (1) and an oxide and/or a hydroxide (2) of a metal selected among aluminum, a group IIA metal and a transition metal with a water-soluble silicate material (A) represented by the formula: M 2 O.xSiO 2 .yH 2 O (wherein M is a group IA alkali metal, N(CH 2 OH) 4 or the like; and x and y are each a positive number). The curing agent (b) is exemplified by a product among phosphoric acid, a condensed phosphate, a water-soluble silicate material (B) of the formula: M 2 O.xSiO 2 .y'H 2 O (wherein y' is a positive number or 0) with a condensed phosphate. COPYRIGHT: (C)1998,JPO

Surface protective sheet

Abstract: PROBLEM TO BE SOLVED: To provide a surface protective sheet having no crack at the molding curved part at the time of adhering to the molding surface by making it possible to obtain the low-cost molding having excellent wear resistance and chemical resistance SOLUTION: This surface protective sheet 5 comprises a protective layer 2 provided at least on one surface of a base sheet 1, and an adhesive layer 4 provided at least on the opposite surface, wherein the layer 2 is formed of a thermal crosslinking reaction product of an active energy beam curable resin composition containing a polymer having (meth)acryl equivalent of 100 to 300g/eq, hydroxyl value of 20 to 500, and weight-average molecular weight of 5,000 to 50,000 and a multifunctional isocyanate as effective components

Microporous membranes and process for the production thereof

Abstract: Microporous membranes excellent in chemical resistance, particularly suitable for microfiltration, and easy of disposal; and a process for the production thereof. Specifically, microporous membranes characterized by being made from a polymer prepared by the ring-opening polymerization of a compound of the chemical formula (I) and by having a bubble point of 10 to 1000 kPa as determined using ethanol (according to the testing method stipulated in JIS K 3832), the polymer including the open-ring polymers and copolymers represented by the chemical formula (II), for example, norbornene resins. A process for the production of a microporous membrane, characterized by casting a solution prepared by dissolving under heating an open-ring polymer of a compound of the chemical formula (I) in a solvent (a) in which the polymer is soluble to form a film, rapidly cooling this film, and extracting the solvent (a) from the resulting film with a cleaning solvent (b) in which the polymer is insoluble to thereby obtain a microporous membrane having a bubble point of 10 to 1000 kPa as determined using ethanol (according to the testing method stipulated in JIS K 3832).

Thermo- and active energy beam-setting resin composition used for protective layer of transfer material, transfer material, surface protecting material, and process for producing molded product of high abrasion resistance and high chemical resistance

Abstract: A sheet material the protective layer of which is made of a thermal reactant of a thermo- and active energy line-setting resin composition containing as effective components a polymer having a (meth)acrylic equivalent of 100-300 g/eq, a hydroxyl group value of 20-500 and a weight average molecular weight of 5,000-50,000, and multifunctional isocyanate. The protective layer provided on the surface of a molded product is cured by the irradiation with an active energy beam. Accordingly, a molded product having a high abrasion resistance and a high chemical resistance is obtained, and cracks do not occur in curved surface portions thereof. Since the protective layer is semi-cured thermally during the production of the sheet material, a large apparatus for applying an active energy beam to the protective layer is unnecessary, and the manufacturing cost decreases.

Chemical-resistant thermoplastic resin composition

Abstract: PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition that excels in chemical resistance without crazing and cracking of moldings of the composition on contact with liquid chemicals while maintaining characteristics such as good mechanical properties and molding processability. SOLUTION: This resin composition comprises (A) 1-80 pts.wt. of a graft copolymer at graft ratio of 15-100% which is obtained by graft polymerization of (I) 5-80 pts.wt. of a diene-based rubber having 0.1-2.0μm weight-average particle size and (II) 95-20 pts.wt of a monomer mixture composed of 45-85wt.% of an aromatic vinyl compound and/or an α,β-unsaturated carboxylic ester, 15-55wt.% of vinyl cyanide and 0-40wt.% of another copolymerizable vinyl monomer, and (B) 0-90 pts.wt. of a copolymer obtained by copolymerization of the monomer mixture of the component II of the component A, and (C) 1-20 pts.wt of a copolymer composed of ethylene/(meth)acrylic ester/CO. The reduced viscosity of the acetone-soluble components of this composition is 0.1-1.0dl/g.

Epoxidized polyene, epoxy resin composition and product of curing thereof, and powder coating material

Abstract: The first invention relates to an epoxidized polyene having either epoxy groups alone or both epoxy groups and hydroxyl groups, characterized in that in the 1 H-NMR spectrum, the sum of integrated values of signals within the range of 1-6 ppm that are assignable to hydrogen atoms on the carbon atoms to which epoxy groups or hydroxyl groups are bonded accounts for 15.5-20.0% of the total integrated value of all the proton signals. The epoxidized polyene of the invention has excellent compatibility with epoxy resins by virture of the presence of a specific amount of epoxy groups or a combination of epoxy and hydroxyl groups. The second invention relates to an epoxy resin composition characterized by containing a mixture of 20-60% by weight of an epoxidized polyene which has an oxirane oxygen content of 6.5-13% by weight and which is prepared by epoxidizing a liquid poly-1,3-diene in which double bonds resulting from 1,4-linkages account for at least 50% of all double bonds and which liquid poly-1,3-diene has a number-average molecular weight of 1,000-30,000 and 80-40% by weight of an epoxy resin other than epoxidized polyenes (the total amount of both being 100% by weight) and a phenol resin which serves as a curing agent. According to the invention, through incorporation of a specific epoxidized polyene, a bisphenol-type epoxy resin, and a curing agent into the composition, a coating film having excellent impact resistance and bend resistance can be formed on metallic surfaces, etc. The third invention relates to a composition comprising diepoxidized dicyclopentadiene and a compound having two or more carboxyl groups in the molecule. This compound has excellent chemical resistance, corrosion resistance, heat resistance, and weather resistance, as well as remarkable gloss, etc.; is useful in the production of powder coating materials; and does not irritate the skin during use.

Silicone resin-containing emulsion compositions, methods for making them, and cured films thereof

Abstract: A silicone resin-containing emulsion composition is prepared by emulsion polymerizing a solution containing a water-insoluble silanol group-bearing silicone resin and a radical polymerizable vinyl monomer and substantially free of an organic solvent. The emulsion may further contain a film-forming assistant having a boiling point of at least 100°C and soluble or uniformly dispersible in water. The emulsion can be coated and cured into a film having mar resistance, weather resistance, and chemical resistance.

Precoating metal plate with excellent stain resistance, flaw resistance and durability

Abstract: PROBLEM TO BE SOLVED: To provide a precoating metal plate having excellent flaw resistance, further excellent stain resistance, durability such as weather resistance, chemical resistance and impact resistance by incorporating coating film hardness of high pencil hardness of 9H or more without breaking base resin and without dropping aggregate. SOLUTION: The precoating metal plate is obtained by sequentially forming a conversion treatment film and a precoating film at least on one surface of a metal plate, further coating it with specific paint composition, and baking it to form an overcoating film. The paint composition contains resin in which block isocyanate and/or melamine resin is mixed in a range of 60:40 to 95:5 by weight of solid content with acryl-siloxane composite resin as main ingredient, and inorganic aggregate containing alumina and/or silica having a mean particle size of 1 to 20μm as main ingredient of 1 to 20 pts.wt. based on 100 pts.wt. of resin solid content.

Active energy ray curing aqueous polyurethane composition

Abstract: PROBLEM TO BE SOLVED: To obtain an active energy ray curing aqueous polyurethane composition for coating with a coating material or an ink excellent in adhesion, chemical resistance, surface hardness and thermal yellowing resistance. SOLUTION: This active energy ray curing aqueous polyurethane composition comprises an aqueous polyurethane compound having groups having an active energy ray curing unsaturated double bond and groups of salts in the molecule and contains methacryloyl groups as the groups having the double bond and the sum of the groups having the double bonds is 1.5-4.5 equiv./kg. The molar ratio of the methacryloyl groups to the acryloyl groups in the polyurethane composition is within the range of (100/0) to (30/100).

Evaluation of poly (epoxy‐chlorinated rubber‐silicone) polymer‐polymer composite coating system

Abstract: Recent developments indicate that the polymer coatings used to protect steel structures from corrosive environments are rarely one‐component systems. Polymeric blends used to protect the structures are a mixture of at least two polymers or copolymers. The heterophase polymer blends are known as polymer‐polymer composites (PPC). The advantages of PPC coatings in comparison to multicoat systems are high thickness per coat, excellent protection and superior layer adhesion. Presents a study in which a poly (epoxy‐chlorinated rubber‐silicone) PPC coating was prepared and its chemical resistance properties in acid, alkali and neutral solutions were studied. Different combinations of these three binders were also prepared in toluene:acetone solvent mixture and the chemical resistance properties of these PPCs were evaluated in comparison with the corresponding multicoat system with the same thickness. Finds that the PPCs show superior properties when compared to multicoat systems. Studies the electrochemical behaviour such as potential, resistance and capacitance of the PPCs and the multicoat systems on steel substrate in sodium chloride solution and finds that the PPCs have higher resistance value than the multicoat systems. Based on the experimental results, concludes that a single coat of PPC can be recommended for protecting the steel structures from chemical and marine environments, instead of using conventional three‐ or four‐coat systems based on the same or different film formers.

Composition for forming water-permeable material water-permeable material and process for producing the same

Abstract: A water-permeable material having good chemical resistance, water resistance and weatherability and in which cracks do not form in the material The composition for forming a water-permeable material includes aggregate grains, a polysulfide-modified epoxy resin and a curing agent for the polysulfide-modified epoxy resin

Epoxyacrylate resin and its use

Abstract: PROBLEM TO BE SOLVED: To obtain the subject resin which has a specific chemical structure and is very useful as a component for solder resists because of high hardness, moisture resistance, thermal resistance, and chemical resistance of the films after being cured as well as of high developability. SOLUTION: The objective compound having structure of the formula (R1 is H, an alkyl, nitro, etc.; R2 is H or methyl; (m) is 1-3; (n) is 0-10) is obtained, preferably, by making an epoxy resin produced by reaction of 6,6- dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane with an epihalohydrin in the presence of a dehydrohalogenation catalyst react with acrylic acid and/or methacrylic acid. The reaction of the epoxy resin with the acrylic acid and/or methacrylic acid is preferably carried out in the presence of such a catalyst as triethylamine and such a polymerization inhibitor as hydroquinone in a diluent at 80-130 deg.C for 3-50hr.

Surface modification of plastic molding and alcoholic silica sol composition used therefor

Abstract: PROBLEM TO BE SOLVED: To coat the surface of a transparent plastic molding with a specific alcoholic silica sol composition by a direct one-coat method without using a primer so as to improve scratching resistance and chemical resistance, etc. SOLUTION: (A) An alkoxysilane comprising a trialkoxysilane and a tetraalkoxysilane in the weight ratio of 3:1 to 15:1 is mixed with (B) tetrahydrofurfuryl alcohol or a mixture of tetrahydrofurfuryl alcohol and a lower alcohol or tetrahydrofuran in the weight ratio of the component A/B of 1/6 to 1/2 and (C) a water-diluted dispersion in an amount of 1/12 to 1/3 as much as the component A obtained by diluting an acrylic polymer having 40-50wt.% solid content with water by 2-16 times. The mixed solution is hydrolyzed/subjected to polycondensation in the presence of an acid catalyst under stirring at room temperature to give a composition, which is directly applied to the surface of a plastic molding, dried naturally or under heating at 60-200 deg.C and cured.