Showing papers on "Chemical resistance published in 1988"

Composite material containing a layered silicate

Abstract: A composite material comprising a resin other than polyamide resin and a layered silicate dispersed therein, said layered silicate having a layer thickness of 7 to 12 Å and an interlayer distance of 30 Å or above. Owing to the layered silicate uniformly dispersed in the resin matrix, the composite material is superior in mechanical characteristics and heat resistance. It also has good water resistance and chemical resistance.

Polycarbonate resin composition

Abstract: OF THE DISCLOSURE A polycarbonate resin composition excellent in chemical resistance, weather resistance, heat resistance, and low-temperature impact resistance, which comprises, either a polycarbonate resin (A) or a mixture (A') of the polycarbonate resin and a saturated polyester and/or a polyester elastomer and either a siloxane based graft copolymer (B) obtained by graft polymerization of 95 to 10% by weight of at least one vinyl monomer onto 5 to 90% by weight of a polyorganosiloxane rubber which exhibits a degree of swelling of 3 to 30 as measured in toluene at 25°C, contains constitutional units derived from a graft-linking agent, and has an average particle size of 008 to 08 µm or a mixture (B) of the siloxane-based graft copolymer and a vinyl polymer, wherein the component (B) is blended so that the content of the polyorganosiloxane rubber may be from 05 to 60% by weight based on the whole resin composition

Organoalkoxysilane-containing coating composition

Abstract: A coating composition comprising: (a) 100 parts by weight (in terms of organoalkoxysilane) of at least one compound selected from the group consisting of (a') an organoalkoxysilane represented by the general formula (I): RSi(OR.sup.1).sub.3 (I) wherein R is an organic group having 1-8 carbon atoms and R 1 is an alkyl group having 1-5 carbon atoms or an acyl group having 1-4 carbon atoms, (a") a hydrolyzate of (a') and (a'") a partial condensate of (a'), (b) 5-50 parts by weight (as solids) of colloidal alumina, and (c 1 ) 2-200 parts by weight of at least one organopolysiloxane having at least one reactive functional group in the polymer molecule and/or (c 2 ) 3-6,000 parts by weight of at least one silyl group-containing vinyl polymer having, at the terminal(s) or side chain(s) of the polymer molecule, at least one silyl group having a silicon atom having bonded thereto a hydrolyzable group, and (d) an organic solvent. Said coating composition is excellent in storage stability, can be used at low temperatures and can form a coating film superior in heat resistance, water resistance, boiling water resistance, organic chemical resistance, acid resistance, alkali resistance, corrosion resistance, absorbability and radiatability of heat and light, friction resistance, weather resistance, moisture resistance, salt water resistance, adhesion, hardness and smoothness.

Styrene-based resin composition and moldings produced from said composition

Abstract: The present invention relates to a styrene-based resin composition comprising (A) a styrene-based polymer having mainly a syndiotactic configuration and (B) a phosphorus-containing antioxidant and a phenolic anti­oxidant wherein the total amount of the phosphorus-­containing antioxidant and the phenolic antioxidant compounded is 0.005 to 5 parts by weight per 100 parts by weight of the styrene-based polymer, and the weight ratio of the phosphorus-containing antioxidant to the phenolic antioxidant is 100:1 to 0.3:1. Accoridng to the present invention, a styrene-­based resin composition having excellent heat stability can be obtained. Further, fibrous molding which is excellent in heat resistance, chemical resistance and so on or molding which is excellent in heat resistance and mechanical strength is provided by spinning or stretching the above composition.

Blends based on vinyl-aromatic polymers endowed with high tenacity and chemical resistance

Abstract: Blends based on vinyl-aromatic polymers endowed with high tenacity and good chemical resistance, comprising: 40 to 98% by weight of a vinyl-aromatic polymer containing from 0.5 to 5% by weight of a vinyl-aromatic monomer conjugated diene block copolymer; 1-54% by weight of a polyolefine; and 1-20% by weight of a vinyl-aromatic monomer-conjugated diene star block copolymer; the sum of the three components being equal to 100%.

Styrene-based resin composition and process for production of moldings

Abstract: Styrene-based resin composition containing as main components (A) 100 parts by weight of a styrene-based polymer having mainly a syndiotactic configuration and (B) 0.01 to 25 parts by weight of one or more nucleating agents selected from the group consisting of (1) metal salts of organic acids having an average particle diameter of not more than 50 µm, (2) inorganic compounds having an average particle diameter of not more than 50 µm, (3) organophosphorus compounds having an average particle diameter of not more than 50 µm, and (4) metal salts of ionic hydrocarbon copolymer, and a process for producing styrene-based resin moldings by molding the above styrene-based resin composition at a temperature between room temperature and 200°C. The resin composition of the present invention is suitable for injection molding and extrusion molding, and provides moldings which are of high crystallinity and are excellent in heat resistance, solvent resistance, chemical resistance and so forth.

Titanium oxide-containing coating compound and coating film

Abstract: PURPOSE:To obtain the titled composition having wear resistance, ultraviolet light screening, chemical resistance, excellent weather resistance and light resistance, adding a specific metallic compound containing an organic group to vehicle of a binder. CONSTITUTION:In a coating compound containing titanium oxide fine particles, the aimed compound containing one or more of a coordination compound (preferably ligand of metal is acetylacetone or acetoacetic ester) of a metal selected from Co, Pa, Ag, Cr, Pb, Cu, Pt, Pd, W, Hg, La, Mo and Bi, an oxy-coordination compound and an alcoholate compound. The titanium oxide fine particles have 1-100 millimicron particle diameter and the prepared coating film is preferably optically transparent. The aimed compound is useful in optical materials made of plastic, glass panels and structural members.

Production of crosslinked resin

Abstract: PURPOSE:To form quickly and easily a crosslinked resin excellent in heat resistance, chemical resistance and mechanical properties, by reacting a thermoplastic polymer or oligomer under heating with a polycycloiminoether in the presence of a catalyst CONSTITUTION:A thermoplastic polymer and/or a thermoplastic oligomer (A) [desirably, linear one having at least one group selected from an aromatic (methyl)amino group and an OH group and an mp <=300 degC] is reacted under heating with a polycycloiminoether (B) of formula I (wherein n is 2-4, R is an n-valent hydrocarbon group, Z is a direct bond or a group of formula II, and Ra and Rb are each H, CH3, C2H5, C3H7, phenyl, tolyl or benzyl, provided that R may be a direct bond when n=2), eg, 2,2'-m-phenylenebis(2-oxazoline), in the presence of a catalyst (eg, p-toluenesulfonic acid) A crosslinked resin which is tough and excellent in heat resistance, chemical resistance, etc can be obtained quickly and easily

Method and apparatus for production of carbonized fiber cloth

Abstract: PURPOSE:To obtain the titled product having excellent heat resistance, thermal shock resistance, chemical resistance, electric conductivity as well as mechanical strength, etc., by immersing a fiber cloth for a carbonization processing to a mixed raw material solution having a specific composition, drying and heating and calcining the treated cloth under high pressure at high temperature. CONSTITUTION:An aqueous solution of (A) thermosetting urea resin (melamine co-condensing type) and (B) zinc chloride or chloride of other metal are blend with (C) diammonium phosphate or a mixture of boric acid and borax as a flameproofing agent and (D) hard carbon powder to provide a solvent solution of mixed raw materials. Then fiber cloth of a raw material for carbonization processing is uniformly sufficiently immersed to said solution. The immersed fiber cloth of raw material is further dried and then heated and calcined under high pressure at high temperature to provide the aimed product.

Vermin-repelling sheet

Abstract: PURPOSE: To obtain a vermin-repelling sheet to be laid under TATAMI mat or carpet and effective in suppressing the proliferation of mite, etc., over a long period by coating a surface of a substrate sheet with a polyurethane resin containing a vermin-repelling agent and laminating an air-permeable covering sheet to the coated surface. CONSTITUTION: The objective vermin-repelling sheet is composed of three layers consisting of a substrate sheet, a polyurethane resin layer containing a vermin- repelling agent and an air-permeable covering sheet. The substrate sheet is a kraft paper laminated with a polyethylene film, etc., on one surface, a synthetic resin film having high chemical resistance, a foamed sheet, etc. At least one of the polyol and polyisocyanate of the polyurethane resin layer has a molecular weight of preferably ≤2,000 to maintain the tackiness and shape- retainability. The covering sheet has drug-permeability. The subject sheet can be used without contacting the agent with hand and causing the pollution of living environment. COPYRIGHT: (C)1990,JPO&Japio

Inorganic coating material

Abstract: PURPOSE: To obtain an inorganic coating material excellent in weathering resistance, water resistance, heat resistance, chemical resistance, etc., by mixing a phosphate condensate with a specified filler, a specified binder, a specified cure accelerator and a pH modifier and grinding the mixture to form a slurry of a pH in a specified range. CONSTITUTION: 2-28 pts.wt. phosphate condensate (A) such as calcium prim. phosphate, aluminum prim. phosphate or zinc prim. phosphate is mixed with 8-57 pts.wt. filler (B) such as kaolin, silica, sericite, bentonite, talc or the like, 70-100 pts.wt. binder (C) based on lithium silicate, 10-30 pts.wt. cure accelerator (D) such as sodium silicate and a pH modifier (E) such as alumina sol, and the mixture is ground with, e.g., a ball mill to obtain a slurry of a pH in a range of 7.0-11.0. An inorganic coating material which is excellent in acid resistance, alkali resistance, water resistance, heat resistance, weathering resistance workability, etc., and can form a smooth ceramic coating surface of a high hardness can be obtained. COPYRIGHT: (C)1990,JPO&Japio

Optical material comprising polycarbonate resin

Abstract: PURPOSE:To facilitate the injection molding of an optical material and to improve its transferability, optical properties and chemical resistance, by preparing said material from a polycarbonate resin having a specified terminal group and a specified MW. CONSTITUTION:This optical material is formed from a polycarbonate resin of a viscosity-average MW of 9,000-22,000, obtained by polymerizing a m- alkenylphenol compound of formula 1 (wherein R is a 1-4C alkyl) as a terminating agent. By modifying a molding formed from a photoinitiator and said polycarbonate resin by irradiation with ultraviolet rays or electron beams, an optical material which can give a molding having a surface markedly improved in heat and chemical resistance can be obtained.

Film-forming resin compositions and their use for coating metals

Abstract: A film-forming resin composition comprising (A) from 1 to 10 weight percent of a phenolic resin, (B) from 10 to 89 weight percent of an epoxy resin and (C) from 10 to 89 weight percent of a reaction product between an epoxy resin and a phosphoric or phosphonic acid or monoalkyl ortho­phosphate, based on the total weight of (A), (B) and (C), is very useful for coating metallic substrates. The cross-linked composition gives colourless coatings of high toughness, flexibility, adhesion and chemical resistance.

Surface treated plastic molded article

Abstract: PURPOSE:To obtain the titled molded article having improved chemical resistance, light transmission properties, flexibility, scratching resistance, adhesivity and water vapor resistance, by treating a plastic molded article with an ultraviolet-curing surface treatment containing an epoxyacrylate resin, a specific photopolymerizable compound, an amino group-containing silane compound, etc. CONSTITUTION:A plastic molded article is surface treated with a composition comprising (A) an epoxyacrylate resin containing two or more (meth)acryloyl groups (e.g. diglycidyl ether of bisphenol A), (B) a photopolymerizable compound containing three or more (meth)acryloyl groups (e.g. polyacrylate of trihydric or more hydric aliphatic polyhydric alcohol), (C) 0.5-10wt% based on the resin component of a photopolymerization initiator and (D) 0.1-10wt% of an amino group-containing silane compound (e.g. aminomethyltrimethoxysilane) in a weight ratio of the component A/B of 60/40-5/95 to form a coated layer having 0.1-50mum, preferably 0.5-30mum thickness.

Organic semiconductor gas sensor element

Abstract: PURPOSE:To obtain a sensor element excellent in resistance to oxidation and chemical resistance, by providing an electrode on a molding comprising a non- soluble non-melting substrate with a specified skelton structure as obtained by thermally treating a condensate of an aromatic hydrocarbon compound having a phenolic hydroxide group and aldehyde. CONSTITUTION:A molding 1 is formed which comprises a non-soluble non- melting substrate having a polyacene-based skelton structure with atomic ratio of 0.6-0.15 in hydrogen atom/carbon atom as obtained thermally treating an aromatic condensation polymer as condensate of an aromatic hydrocarbon compound having a phenolic hydroxide group and aldehyde. A gold evaporated film 2 is deposited on the molding 1 with a vacuum evaporating machine and a copper wire 3 adheres to the evaporation surface thereof by a silver conductive paste 4 to mount at least two electrodes. Thus, a gas sensor element can be obtained superior in resistance to oxidation and chemical resistance.

Nozzle for molding

Abstract: PURPOSE:To keep the ubiquitous deposition of metals partly on a nozzle as small as possible and to improve corrosion resistance, pinhole resistance, abrasion resistance releasability of the nozzle, by forming the surface of a material comprising iron as a main component whose ratio of rust prevention is at a specified value or less in the case when it is immersed in an antimony compound solution of ethylene glycol. CONSTITUTION:A nozzle for molding is composed of a material at least in its surface whose main component is iron and whose ratio of rust prevention is 20 ppm or less in the case when it is immersed in an antimony compound solution of ethylene glycol. If a raw material whose ratio of rust prevention is higher than 20 ppm, antimony metal formed by reduction of an antimony compound is ubiquitously deposited from the surface of the nozzle for molding on the part where elution easily occurs with the elution of iron ions. As the result, projecting portions are produced on the nozzle surface and they cause the formation of dented stripe-like defects on the extruded polymer film surface. As the raw material whose main component is iron, chromium plating and nickel plating are preferable from the view point of no defect on the surface, abrasion resistance, corrosion resistance, chemical resistance and releasability from polymers.

Process for producing aromatic polyether sulfones

Abstract: A process for the preparation of crystalline, aromatic polyether ketones of high molecular weight, high heat resistance, high chemical resistance and good mechanical properties.

Use of a solid phenol formaldehyde condensation product as a hardener in epoxy resin mixtures and process for making a powder paint from said mixtures

Abstract: A phenol formaldehyde condensation product containing on average more than two aromatic hydroxyl groups per molecule, having a hydroxy equivalent in the range 100 - 110 and a Kofler melting point greater than 75°C and a glass transition point determined by differential scanning calorimetry (DSC) greater than 55°C, is used as a phenolic hardener in epoxy resin powder paints consisting mainly of a bifunctional epoxy resin with an epoxide equivalent between 500 and 2500. Paint coatings of these powder paints have the same good mechanical properties as similar known powder paints and greater chemical resistance.

Composite fiber having excellent heat-resistance, chemical resistance and antistaticity

Abstract: PURPOSE:To obtain a sheath-core composite fiber having excellent heat- resistance, chemical resistance and antistaticity, by covering a core part composed of a polymer containing electrically conductive power with a specific amount of a polymer composed mainly of polyphenylene sulfide. CONSTITUTION:The objective sheath-core composite fiber is composed of a core component A consisting of a polymer (e.g. polyolefin, polyester, polyamide, etc.) containing 15-80wt% electrically conductive powder and a sheath component B consisting of polyphenylene sulfide as >=80wt% thereof and the remaining part of preferably polyethylene terephthalate. The areal ratio of the component B in the cross-section of the fiber (B/A+B) is 0.05-0.5 and the electrical conductivity of the fiber is 10 -10 OMEGA/cm.f under 10kV potential.

Aromatic polysulfone polymer composition

Abstract: PURPOSE:To obtain an aromatic polysulfone polymer composition having excellent chemical resistance, mechanical strength, heat-resistance and moldability, by compounding an aromatic polysulfone polymer with a specific amount of a specific polyether imide. CONSTITUTION:The objective polymer composition is produced by (1) compounding (A) 100pts.wt. of an aromatic polysulfone polymer, e.g. composed of recurring units of formula I and/or formula II with (B) >=1pt.wt. and =5pts.wt. and =2C aliphatic group, cycloaliphatic group, etc.) and produced by the dehydrative cyclization of a polyamic acid produced by the reaction of an ether diamine of formula III (X is direct bond, 1-10C bivalent hydrocarbon group, etc.; R1-R4 are H, lower alkyl, etc.) with one or more kinds of tetracarboxylic acid dianhydrides, (2) preliminarily kneading the mixture e.g. with Henschel mixer and (3) pulverizing the kneaded mixture.

Paint resin composition

Abstract: PURPOSE:To provide a room-temperature drying paint resin compsn. which gives a coating film having excellent processability and resistance to marring, impact and weather, by radical-copolymerizing a radical-polymerizable compd. mainly composed of a (meth)acrylate with a methyl methacrylate polymer having a radical-polymerizable functional group. CONSTITUTION:A paint resin compsn. consists of a graft polymer obtd. by radical-copolymerizing a radical-polymerizable compd. (A) mainly composed of a (meth)acrylate (a combination of butyl acrylate with methyl methacrylate is preferred, because a paint resin having excellent film-forming properties and weather resistance can be obtd.) with a polymer (B) mainly composed of a methyl methacrylate unit and having a radical-polymerizable functional group 9e.g., methacryloyl group). The resin compsn. gives a coating film having excellent surface hardness (mar resistance) as well as excellent processability and resistance to impact and weather and can be widely used as indoor and outdoor paints. Further, the compsn. can be crosslinked to cure so that it can be used as paint having improved chemical resistance, etc.

Production of porous object

Abstract: PURPOSE:To facilitate the formation of a porous object having uniform pore diameter, excellent heat resistance, chemical resistance, etc., and high mechanical strengths, by heat-treating an intimate mixture comprising a specified polymer blend in a specified temperature range to effect its phase separation, cooling the mixture and extracting poly(2-oxazoline) from it with water. CONSTITUTION:By heating a polymer blend of a linear aromatic polyether sulfone (preferably, one having structural units of formulas I, II and III and an MW of 1000-500000) and poly(2-oxazoline) [preferably, a linear polymer having structural units of formula IV (wherein R is an alkyl, desirably, CH3 or C2H5) and an MW of 1000-1000000] both of which are in a intimately mixed state to the spinodal temperature to (this temperature +100 deg.C), both polymers are separated from each other in the state of continuous phases. This mixture is cooled to the glass transition temperature or below, and the poly(2-oxazoline) is extracted with water to produce a porous object. According to the above process, a porous object having a uniform pore diameter, excellent heat resistance and chemical resistance and high mechanical strengths can be easily obtained without using any special solvent.

Effect of hydrated silica on the permeation resistance and mechanical properties of nitrile butadiene rubber

Abstract: The permeation of toluene in nitrile butadiene rubber was investigated. It was found that the incorporation of a reinforcing filler, hydrated silica, has a favorable impact on both the chemical resistance and the mechanical properties of the elastomer.

Gas separating membrane

Abstract: PURPOSE:To prepare a gas separating membrane of good membrane strength and superior oil resistance and chemical resistance by carrying a silicon group high molecular substance on an orientation porous high molecule substrate. CONSTITUTION:A gas separating membrane is prepared by such a method that silicon group high molecular substance such as dimethyl siloxane, trimethyl vinyl silane, trimethyl silyl propyne polymers or the like dissolved in an organic solvent is infiltrated into an orientation porous substrate formed by polytetrafluoroethylene, polypropylene or the like and carried by the substrate by removing the solvent. A gas separating membrane the prepared is of good membrane strength and superior oil resistance and chemical resistance.

Chemical resistant glass fiber

Abstract: PURPOSE:To improve the chemical resistance of a glass fiber and to reduce the production cost thereof by coating and forming a chemical-resistant thin- layered film consisting of specific components on the surface of the glass fiber CONSTITUTION:Glass such as quartz glass or E glass essentially consisting of SiO2 is used for the silica glass fiber as stock The thin-layered film to be coated and formed thereon is the thin-layered film essentially consisting of the oxide of one or more kinds of metals selected from Zr, Sn, La, Mn, Ti, and Ta according to the desired chemical resistance and applications; for example, one kind of the oxide ZrO2 is selected as the preferable oxide for alkali resistance The thin-layered film to be coated and formed may be polycrystal such as ceramics or may be crystal The chemical resistance is effectively and economically imparted to the glass fiber by forming the layer enriched with the chemical resistant component on the surface of the glass fiber

Production of colored non-absorptive material

Abstract: PURPOSE:To produce a colored non-absorptive material smooth and excellent in abrasion resistance and chemical resistance, by providing a printed layer on the surface of a non- absorptive material through specified steps by using a two-stage reaction ink comprising a compound capable of a photo-reaction or a thermal reaction and a compound capable of a thermal reaction, oxidation or a moisture-induced reaction CONSTITUTION:A colored non-absorptive material is obtained by providing a printed layer on the surface of a non-absorptive material formed of a glass, a metal, an enamel, a resin film or the like by using a two-stage reaction ink comprising a compound having a double bond capable of a photo-reaction or a thermal reaction and a compound having a double bond or functional group capable of a thermal reaction, oxidation or a moisture-induced reaction The colored non-absorptive material is obtained through a process comprising a step (1) of printing on the surface of the non-absorptive material, a step (2) of drying the surface of the printed layer obtained by the step (1) by irradiating the surface with UV rays, and a step (3) of printing on the printed layer or on other part of the non-absorptive material, and further comprising a step (4) of drying the surface of the printed layer obtained by the step (3) by irradiating the surface with UV rays, and a step of drying the printed layers obtained by the steps (1), (3) by bringing them into a thermal reaction, oxidation or a moisture-induced reaction

Hydrogenated ring-opening polymer composition

Abstract: PURPOSE: To make it possible to form a hydrogenated ring-opening polymer composition excellent in impact resistance as well as in heat resistance, thermal aging resistance, chemical resistance, solvent resistance, dielectric properties, rigidity, etc., by mixing a specified hydrogenated ring-opening polymer with an elastomer. CONSTITUTION: 100 pts.wt. hydrogenated ring-opening polymer which is a polymer obtained by hydrogenating a ring-opening polymer comprising at least one member selected from among cycloolefin components represented by formulas I and II (wherein n and m are each 0 or a positive integer; l is an integer ≥3; and R 1 -R 10 are each a hydrogen atom, a halogen atom or a hydrocarbon group) and having an intrinsic viscosity [η] in the range of 0.05-10dl/g as measured in decalin at 135°C, and a softening temperature (TMA) ≥70°C is mixed with an elastomer one of whose glass transition points is below 70°C. COPYRIGHT: (C)1990,JPO&Japio

Photosensitive composition and photosensitive copying material

Abstract: PURPOSE: To ensure high chemical resistance and more satisfactory resistance to an alkali developer and an org. solvent by incorporating specified naphthoquinonediazidosulfonic ester. CONSTITUTION: This compsn. essentially contains 1,2-naphthoquinone-2-diazido-4- or -5-sulfonic ester represented by formula I as a photosensitive compd. and a resin binder insoluble in water but soluble or swellable in an aq. alkali soln. In the formula I D is 1,2-naphthoquinone-2-diazido-4- or -5-sulfonyl, R1 is H or -OD and R2 is alkyl or optionally substd. aryl. High photosensitivity and satisfactory developer resistance are ensured.