Showing papers on "Chemical resistance published in 1980"

Novel thermoplastic resin composition

Abstract: PURPOSE: A molding material not causing lamellar release of molded article, having improved mechanical properties, wear resistance, chemical resistance, and heat resistance, obtained by blending a copolymer containing an imide compound of an unsaturated dicarboxylic acid with polyamide and a thermoplastic resin. CONSTITUTION: (A) A copolymer (preferably a styrenic or an unsaturated carboxylic acid ester copolymer) containing 1W30mol% imide compound of α,β-unsaturated dicarboxylic acid as a copolymer component is blended with (B) a polyamide, especially one having a molecular weight of 15,000W40,000 and (C) a thermoplastic resin (e.g., styrenic resin, or polycarbonate resin) as a third component under sufficient shear stress at 220W330°C in a molten state. In the amounts of the components, the amount of the copolymer obtained by the high polymer reaction of the component A and the component B is an amount wherein it is dispersed as particles having diameters ≤15μ into the composition (the amount of the copolymer is ≥10wt%), the amount of the component A is 5W 70wt%, that of the component B is 5W80wt% and that of the component C is 10W90wt%. COPYRIGHT: (C)1983,JPO&Japio

Ion exchanger of hydrated oxide of Ti, Zr, or Sn and cured polyester, and exchange method

Abstract: An adsorbent, which is prepared by subjecting to curing a mixture consisting of (a) one part by weight of at least one member selected from the group consisting of titanium oxide hydrate, zirconium oxide hydrate and tin oxide hydrate and of (b) about 1/10 to 3 parts by weight of an epoxy, unsaturated polyester or polyurethane resin. The adsorbent can be used as an adsorbent for a great variety of anions and cations and especially as the adsorbent for phosphate ion. The adsorbent displays also improved chemical resistance, resistant to acids and alkalis, and can be subjected to repeated desorption and regeneration procedures without causing any deterioration of its adsorptive capacity, thus permitting the repeated usage over a long period of time.

Process for producing polyimide-amide-carboxylic acid

Abstract: Polyimide-amide-carboxylic acids produced by reacting an aromatic diamine with an aromatic tetracarboxylic acid dianhydride in amounts of 1.5 to 2.0 moles of the latter per mole of the former in the presence of an inert solvent, and reacting the resulting intermediate reaction product with an aromatic diisocyanate in about equivalent amounts at a temperature of 50° to 100° C. while removing generated carbon dioxide from the reaction system are good in heat resistance, wear resistance, chemical resistance, etc.

Method of producing complex pipe

Abstract: PURPOSE:To provide a pipe excellent in corrosion resistance and chemical resistance at the inner part thereof and which is excellent in rigidity and impact resistance at the outer part thereof, by continuously forming a fiber-reinforced pipe of a thermoplastic resin resin which is to form an inner part of a complex pipe, and a fiber- reinforced pipe of a thermosetting resin which is to form an outer part of the complex pipe. CONSTITUTION:A cantilever type core 2 is set on a stationary base 1, and an endless belt 11 is wrapped spirally by at least one full turn around the core 2 so as to be forcibly rotated by rolls 9, 10. A strip 3 is wound spirally around the core 2. A fiber strip 4 is passed through a vessel 5 containing a thermoplastic resin, so as to be formed into a resin-containing fiber strip 6. The fiber strip 6 is spirally wound around the core so as to be pressed by a press roll. The resulting fiber strip is cooled 8 with air. The fiber strip is further spirally moved by the endless belt 11 wrapped around the rolls 9, 10 while winding around the fiber strip an elongated fiber 12 containing a hardenable resin. The fiber 12 is then hardened in a heating furnace to form a complex pipe 14.

Flexible epoxy resin composition

Abstract: PURPOSE: To produce titled composition superior in impact resistance, adhesiveness and chemical resistance and much improved in flexibility, by blending a solid epoxy resin with a solid resol type phenol resin and further with a straight-chain polyamide resin. CONSTITUTION: 20W80wt% Solid epoxy resin is blended with 80W20wt% solid resol type phenol resin (B) having a softening temperature 70W90°C a gelation time ≥80sec at 150°C and 25W45 methylol index (e.g., a product prepared by condensing 1mol of a phenol with 1W4mol of an aldehyde in the presence of a basic catalyst and adjusting the condensate so as to meet the aforesaid conditions). 100pts.wt. Resulting mixture is further blended with 5W67pts.wt. straight-chain polyamide resin (C) (e.g., nylon 11, 12 etc.). This product is improved not only in impact resistance, adhesiveness and chemical resistance due to the addition of constituent B but also in flexibility due to the addition of constituent C, so that it is free from cracking, etc. COPYRIGHT: (C)1981,JPO&Japio

Carbon fiberrreinforced composite material

Abstract: PURPOSE:Title composite material that is made by impregnating carbon fibers with polyphenylene sulfide and polysulfone, thus preventing the thermal crack and having high heat and chemical resistance and mechanical strength CONSTITUTION:Carbon fibers are impregnated with a resin composition mainly consisting of (a) 70-98wt% of polyphenylene sulfide of formula I and (b) 30- 2wt% of polysulfone having the major structural unit of formula II (A is divalent aromatic group which may be intercepted with carbon atoms of ether and/or divalent aliphatic group EFFECT:The deterioration of the carbon fibers can be prevented, the flexibility of the resin is improved, thereby the resulting preplegs show good handlability

Manufacturing of microoporous material

Abstract: PURPOSE:To manufacture a micro-porous material having excellent mechanical properties, and useful as a filter, etc., by melting and forming a specific composition composed of a specific polyolefin, a water-soluble material, and a filler, and extracting and removing the water-soluble material from the formed article. CONSTITUTION:A composition composed of (A) 12-65 vol% of a polyolefin having a melt index of 0.01-20 under standard load condition, e.g. polyethylene, (B) 24-74 vol% of a water-soluble substance such as inorganic salts, and (C) 0-40 vol% of a hydrophilic filler such as SiO2, is extrusion or injection molded to a sheet of 20-100mu thickness. the water-soluble substance is extracted from the sheet with water at >= 25 deg.C to afford a micro-porous material having a porosity of 35-74%. The product has excellent chemical resistance, oil resistance and mechanical properties, and can be used as, e.g. a filter, a battery separator, etc.

Vinyl Ester Resins

Abstract: Vinyl ester resins are relatively recent additions to the thermosetting family. They have some features in common with unsaturated polyesters, and most have structural features similar to those of epoxides. They are notable for their high-temperature properties, their chemical resistance, their high elongation and their convenient processing characteristics.

Coating of vinyl chloride resin product

Abstract: PURPOSE:To obtain a resin product having excellent wear resistance, surface hardness, scuff resistance, weathering resistance, chemical resistance and heat resistance, by a method wherein a vinyl chloride resin product is coated with an epoxy resin contg. a cpd. releasing an active catalyst, and then the product is subjected to an energy ray irradiation. CONSTITUTION:The surface of a vinyl chloride resin product is coated with an epoxy resin compsn. contg. a cpd. releasing an active catalyst by which the polymn. of the epoxy resin compsn. is initiated when the compsn. is subjected to an energy ray irradiation. Then the epoxy resin compsn. is polymerized by the energy ray irradiation. Examples of the cpd. releasing the active catalyst are cpd. of the formula (wherein cation is onium salt; Z is N N, S, Se, Te, P, As, Sb, Bi, O, halogen; R -R are org. gp.; a-d are 0-3, a+b+c+d is equal to the valence of Z; M is metal or semimetal which is a central atom of a halide complex; X is halogen; m is net charge of the halide complex ion; n is the number of halogen atoms present in the halide complex ion).

Molding of thermosetting resin

Abstract: PURPOSE: To obtain the molding of a thermosetting resin which has a transparent marbled pattern, a high hot water resistance, and excellent chemical resistance by using a thermosetting resin containing as a filler a specific composition of glass powders whose surface is treated with a silane coupling agent or an organopolysiloxane. CONSTITUTION: A glass powder, consisting of 40W65wt% SiO 2 , 10W30wt% B 2 O 3 , 5W20wt% one or more of alkali metal oxides, 5W30wt% one or more of alkaline earth metal oxides or ZnO, 0W15wt% Al 2 O 3 , 0W10wt% TiO 2 , and 0W 10wt% ZrO 2 , is treated its surface with 0.01W0.5pts.wt. (based on 100pts.wt. glass) silane coupling agent or organopolysiloxane to manufacture a resin molding which has a onyx, opal, or marble pattern having transparent appearance, high hot water resistance, and excellent chemical resistance. Also, on the surface layer of the material, a transparent resin layer without any glass powder as a filler is formed to form substantially a two-layered structure. COPYRIGHT: (C)1981,JPO&Japio

Flame-spraying coating

Abstract: A powdered composition comprising (1) an organic polyisocyanate blocked with ethyleneimine and (2) a partially hydrolyzed product of an ethylene-vinyl ester copolymer and/or a carboxyl-modified-product of said partially hydrolyzed product exhibits exceedingly good levelling and post-curing characteristics and is advantageously flame-sprayed to give a coating film having good weatherability, heat resistance and chemical resistance.

Fluoroplastic composition having excellent thermal stability

Abstract: PURPOSE:To provide the title composition giving a coating film having excellent chemical resistance and heat resistance, by compounding a hot-melt fluoro-plastic composed of a tetrafluoroethylene or a chlorotrifluoroethylene copolymer, a phenolic antioxidant, an organic sulfur compound and an organo-tin antioxidant. CONSTITUTION:A composition composed of (A) 100parts by weight of a hot-melt fluoroplastic comprising tetrafluoroethylene or chlorotrifluoroethylene copolymer, and (B) 0.05-10parts of heat stabilizers consisting of (a) a phenolic antioxidant and (b) one or more compounds selected from organic sulfur compounds and organic tin compounds. The weight ratio of (a) to (b) is pref. 1:5-5:1. The particle size of the heat stabilizer is pref. <=70mu. The composition is suitable for the thick coating, and has a wide allowable range for the temperature and time of application.

Curable resin composition

Abstract: PURPOSE:To prepare a resin composition useful as a coating, a putty, a binder for inks or a casting material, and giving the cured product having excellent flexibility, water resistance, chemical resistance, mechanical strength and surface drying characteristics in air, by compounding a specific vinyl monomer with a polymerization initiator. CONSTITUTION:A vinyl monomer composition comprising (A) 100-0.5pts.wt. of the (meth)acrylate of a polyester having terminal hydroxyl groups and prepared by reacting (a) a polyhydric alcohol I (R1 is H or CH3; R' and R'' are 2-4C alkylene; Xn is 1-4H, Cl or Br; l and m are integers of >=1, l+m=2-40) with (b) a carboxylic acid having an air-drying unsaturated group in the molecule (e.g. tetrahydrophthalic acid, etc.), and (B) 0-99.5pts.wt. of a monomer II (R2 is H or CH3), is compounded with (C) a polymerization initiator or a photosensitizer.

Filler or pigment prepn. for polymer or ceramic compsns. - by applying silane, titanate or silicone coupling agent to particulate or fibrous solid

Abstract: Filler or pigment is prepared by spraying or pouring 0.01-5 wt % of an ambi-or monofunctional coupling agent onto a dry hydrophilic inorganic solid while the solid is agitated. The coupling agent is a silane, a titanate of the formula R3TiX where R is a group attached to Ti by a thermally and hydrolytically stable bond and X is a hydrolysable group, or a 'glass resin thermoset silicone coupling agent'. The solid is particulate or fibrous and crystalline or amorphous. It is agitated in a high intensity mixer having blades driven at 200-18000 rpm within a mixing chamber at 70-350 degrees F. To improve the flexural strength, moisture and chemical resistance and dielectric constant of resins such as PVC room temp. cured epoxies and diallyl phthalate resins. The high intensity mixing coats faces and fractured surfaces of the solid without agglomeration.

Preparation of novel liquid polybutadieneemodified phenolic resin

Abstract: PURPOSE:To obtain the title resin suitable for use in substrate impregnation varnishes, having improved solubility in organic solvents, at a low cost, by reacting formaldehyde with the addition reaction product between phenol and a liquid polybutadiene. CONSTITUTION:(B) A phenol is subjected to addition reaction with (A) a liquid polybutadiene having an average molecular weight of 150-5,000 in the presence of an acid catalyst to give a ratio of the number of butadiene monomer units in (A) to that of molecules of (B) of 3-8:1. The reaction product is then reacted with (C) formaldehyde in the presence of a primary amino of the formula R-NH2 (R is 1-20C alkyl group) solely or in combination with a basic catalyst. EFFECT:Laminates prepared from the resin have improved mechanical workability, chemical resistance, and curability.

Solvent type paint resin

Abstract: PURPOSE:To provide title resin which produces a paint having good weathering resistance and chemical resistance, by a method wherein at least one amino cpd, such as urea or dicyandiamide, is reacted with polyester resin contg. terephthalic acid, isophthalic acid or phthalic anhydride. CONSTITUTION:(B) 0.2-15wt% of at least one amino cpd. selected from urea, thiourea, dicyandiamide, aminotriazine cpd. and heterocylic fatty acid amine cpd. is added to a polyester resin having a softening point of not more than 200 deg.C and contg. not less than 30mol% of terephthalic acid, isophthalic acid or phthalic anhydride or a mixt. thereof as acid component to obtain a polyester resin contg. active amino gp or imino gp. in the molecule as a reaction product. By using the above reaction product, there is provided a solvent type paint compsn. which comprises the produced polyester resin and produces baking type or room-temperature drying type paint.

Fibrous substrate vulcanization-adhered to ethylene-propylene rubber composition

Abstract: By blending 5-40 parts by weight of a polyisoprene having an intrinsic viscosity [n] of 0.2-1.5 dl/g as measured in toluene at 30° C. and a total 1,2- and 3,4-configuration content of 30% or less in its micro-structure into 100 parts by weight of an ethylene-propylene rubber, the adhesive property of the ethylene-propylene rubber to fibers can be improved while maintaining the heat resistance, weather resistance, ozone resistance, low temperature properties, electrical insulating property and chemical resistance which are all characteristic of ethylene-propylene rubber.

Production of polyfunctional acrylic monomer

Abstract: NEW MATERIAL:Polyfunctional acrylic monomer that is obtained by reaction of alloocimene dioxide and acrylic homolog, thus having at least one of functional groups as vinyl, epoxy, hydroxyl, halogen, etc, in the molecule USE:Additive of synthetic resin, fiber, coating, adhesive, ink Modifier for powder coating The addition of the product increases the adhesion, hardness, deflection, toughness and chemical resistance of epoxy resin, the weathering resistance and appearance as luster of acrylic resin, the appearance and toughness of polyester and wearing resistance of polyamide PREPARATION:The reaction of 1mol of alloocimene dioxide (2,3,-6,7-diepoxy-2,6- dimethyl-4-octene) and 05-2mol of a compound with acryl group as acrylic or methacrylic acid give the objective compound

Epoxy resin powder for wire coating and method of applying an electrical insulating coating to wire

Abstract: Powder useful for applying coatings to wire, which coatings when cured have good electrical-insulating values, good resistance to physical stresses such as thermal shock, and good chemical resistance, the novel powder being a blend of (a) polyglycidyl ether capped with monobasic aromatic acid such as benzoic acid and (b) trimellitic anhydride.

Preparation of styreneebased polymer having high water absorption property and water retention characteristic

Abstract: PURPOSE:To prepare a styrene-based polymer useful for sanitary goods etc. and having improved transparency, heat resistance, toughness, impact resistance and chemical resistance, by treating an acrylonitrile-styrene copolymer having a specific composition with concentrated sulfuric acid. CONSTITUTION:The beads of an acrylonitrile-styrene copolymer having a number average molecular weight of >=5,000 and an acrylonitrile content of 20-30wt% are first prepared by suspension polymerization method, etc. The residual monomers contained in the beads are extracted with steam and the beads having the particle size of 40-80 mesh are obtained by classification. The beads are introduced into 75-98% concentrated sulfuric acid and treated at 20-130 deg.C to sulfonate the styrene unit and to hydrolyze the acrylonitrile unit. If necessary the product is further treated with an aqueous solutin of caustic soda, etc. to give the alkali metal salt.

Preparation of latex

Abstract: PURPOSE:To prepare a latex without causing coarse particles stably and economically, by dispersing an ethylene-copolymer containing an alkali metal, having a moderate wettability with hot water and the heat of fusion, in warm water. CONSTITUTION:An ethylene copolymer consisting of ethylene-unsaturated carboxylic acid or ethylene-unsaturated carboxylic acid-polymerizable ester monomer, wherein part or all of the carboxylic acid is an alkali metal salt, is dispersed in warm water at 60-120 deg.C to give the objective latex. The copolymer has a wettability with hot water at 95 deg.C of 5-200%, preferably 5-100%, and the heat of fusion of 2.0-11.0 cal/g, preferably 3-10cal/g. EFFECT:Water, oil, and chemical resistance, and heat sealing properties, and adhesion to other substrates can be imparted to paper aluminum foils, and synthetic resin films by coating the latex thereon.

Hottmelt bonding film

Abstract: PURPOSE:A hot-melt bonding film having improved aging, heat, and chemical resistance, and toughness, prepared by forming a blend of ethylene-vinyl acetate copolymer, styrene-butadiene rubber, and an ABS resin into a film. CONSTITUTION:A blend of (A) 10-70wt% of ethylene-vinyl acetate copolymer, (B) 10-80wt% of styrene-butadiene rubber, and (C) 10-50wt% of an ABS resin is formed into a film. If the amounts of (A) and (B) are less then 10wt% respectively, the adhesion is poor. If the amount of (A) is larger than 70wt% or that of (B) exceeds 80wt%, the adhesion is poor. If the amount of (C) is less than 10wt%, the low chemical resistance results in peeling. If the amount of (C) exceeds 50wt%, the adhesion is poor. EFFECT:Sufficient adhesion can be retained even at a high temperature of about 80 deg.C.