Showing papers on "Chemical resistance published in 1993"

Laminates of polymer shaving perfluorocyclobutane rings

Abstract: A laminate has at least two layers, at least one of which comprises a polymer having more than one perfluorocyclobutane group. Such polymers impart qualities of enviornmental or protection, chemical and solvent resistance, hydrolytic stability, lubricity, low dielectric, hydrostatic stability, weatherability, flame resistance, chemical resistance, hydrolytic stability, lubricity, environmental protection, scratch resistance, solvent resistance, surface passivation, water repellancy, lower surface refractive index, lower surface coefficient of friction, fluid barrier properties, oil repellancy, thermal stability, and/or reduced moisture pick-up. Additionally, the coatings are optically clear, easy to apply either neat, in a solvent or otherwise, have relatively low cure temperatures for their temperature resistance, and exhibit insulating and planarizing capabilities.

Heat-sensitive recording material

Abstract: A thermal recording material having solved problems attributed to use of a crosslinking agent in a protective layer, which thermal recording material can be produced by easy process with high productivity and excels in water resistance, thermal stability (traveling stability) and chemical resistance. In particular, a thermal recording material having a protective layer composed mainly of a resin emulsion (a) comprising an emulsion (b) of copolymer resin of 12.0 or higher SP value (solubility parameter), 10 to 70°C glass transition temperature (Tg) and 5°C or below minimum film forming temperature (MFT) obtainable from (meth) acrylonitrile and a vinyl monomer copolymerizable therewith and an emulsion (c) of polyolefin copolymer resin.

Crosslinkable norbornene resin composition and molding made therefrom

Abstract: PURPOSE: To obtain the subject composition which can give a molding improved in electrical insulation properties, heat resistance, chemical resistance, etc., by mixing a thermoplastic hydrogenated ring-opening norbornene resin with an organic peroxide, a crosslinking aid and a specified flame retardant. CONSTITUTION: 100 pts.wt. thermoplastic hydrogenated ring-opening norbornene resin of a molecular weight of 10000-200000 and a degree of hydrogenation of 90% or above is melt-mixed with 0.001-30 pts.wt. organic peroxide, 0.1-10 pts.wt. wt., per pt.wt. organic peroxide, crosslinking aid and optionally 5-150 pts.wt. flame retardant of formula I or II (wherein (n) and m 1 to M 6 integers; n ≥0; 1≤m 1 ≤5;1≤m 2 5;1≤m 3 ≤4;1≤m 4 ≤5;1≤m 5 ≤5; and 1≤m 6 ≤5) to obtain a resin composition. This resin composition is molded and crosslinked at 80-350°C for 5-120 min to obtain a crosslinked molding having a water absorptivity of 0.03% or below, an insulation resistance of 10 15 to 10 17 Ω, a dielectric constant of 2.0-2.5 at 1MHz and a dielectric loss tangent of 0.0001-0.0007. COPYRIGHT: (C)1994,JPO&Japio

Ethylene cycloolefin random copolymer compositions

Abstract: Cycloolefin random copolymer compositions which contain a blend of at least two or three cycloolefin random copolymers are disclosed. The random copolymers are obtained by copolymerization of ethylene and at least one of two cycloolefins. The resin compositions exhibit excellent moldability and transparency, heat resistance, thermal aging resistance, chemical resistance, solvent resistance, dielectric and mechanical characteristics and transferability of the pit.

Heat-resistant adhesive material

Abstract: PURPOSE:To obtain an adhesive material having excellent electrical characteristics, chemical resistance, low water-absorptivity and high dimensional stability and useful for fixing a lead frame, etc., by laminating a specific heat- resistant adhesive to a surface of a polyphenylene sulfide resin film. CONSTITUTION:This adhesive material is produced by coating (A) at least one surface of a polyphenylene sulfide resin film such as a film treated with corona discharge or low-temperature plasma with (B) a heat-resistant adhesive comprising a polyimide resin thin film produced by imidating a polyamic acid derived from an aromatic tetracarboxylic acid and a diamine component containing >=5mol% of the diamine of the formula ((n) is >=1; R1 and R2 are lower alkylene or phenylene; R3 to R6 are lower alkyl, phenyl or phenoxy) as at least one of the coating layers.

Urethane modified waterborne dispersions

Abstract: An excess of a urethane modified polyfunctional epoxide compound is reacted with a tertiary amine salt to form a quaternized epoxy resin. The quaternized epoxy resin is then dispersed in water. Therein the residual epoxy functionality is reacted with a polyamine, to form a waterborne epoxy resin system. The urethane modification leads to significant improvements in properties such as dry rate, adhesion, and chemical resistance, particularly aviation hydraulic fluid resistance. The waterborne dispersions of the urethane modified epoxy resins are useful in coating, ink and adhesive applications at ambient and elevated temperature curing conditions.

Adhesive fluorine polymer and laminatings therefrom

Abstract: PURPOSE:To obtain the title polymer which comprises a specific graft copolymer and a tetrafluoroethylene-ethylene copolymer and is useful in laminated films because of its high adhesion, excellent chemical resistance, weather resistance and surface characteristics. CONSTITUTION:The objective polymer comprises (A) a graft polymer prepared by grafting (i) an acrylonitrile-styrene copolymer onto (ii) an ethylene-glycidyl methacrylate-maleic anhydride terpolymer and (B) a tetrafluoroethylene-ethylene copolymer where the amount of the component A is recommendably 0.2 to 5 pts.wt. per 100 pts.wt. of the component B.

Thermoplastic resin composition, cured material thereof and color filter material

Abstract: PURPOSE:To improve the heat resistance, chemical resistance, cracking resistant, transparency, adhesion, insulating properties, etc., by using a specified (meth) acrylate compound, an epoxy compound and a radical polymerization initiator as the constituents. CONSTITUTION:The composition is obtained by mixing: 100 pts.wt. (meth) acrylate compound consisting mainly of structural units of formulas I and II [R1 and R2 are each H, 1-5C alkyl or halogen; R3 is H or methyl; X is -CO-, -SO2-, -C(CF3)2-Si(CH3)2, -CH2-, C(CH3)2, -O-, a group of formula III or absent; Y is an acid anhydride residue; Z is an acid dianhydride residue; and m and n are each the number of mol of the structural units and m:n is (0:100) to (100:0)] and having an inherent viscosity (0.5g/100ml N-methylpyrrolidone solution at 30 deg.C) of at least 0.1dl/g; 5-200 pts.wt. epoxy compound; and 0.1-10 pts.wt. radical polymerization initiator.

Silazane-based, heat resistant, dielectric coating compositions

Abstract: By blending a silazane with an organic silicon polymer such as polycarbosilane and polysilazane and inorganic powder such as alumina and silica, there is obtained a coating composition which can be applied and baked onto metallic and non-metallic substrates to form dielectric coatings which are improved in many properties including substrate adhesion, hardness, electrical insulation, heat resistance, water resistance, and chemical resistance.

Composition for urethane resin coating

Abstract: PURPOSE:To obtain a composition for urethane resin coating having good gloss and apparent thickness, capable of forming a long-term weather resistant coating film excellent in gloss retaining property, discoloration resistance, crack resistance and blister resistance in long-term outdoor use without impairing physical and chemical properties such as solvent resistance and chemical resistance. CONSTITUTION:The composition for urethane resin coating contains an acrylic polyol obtained by copolymerizing a polymerizable monomer component consisting of (a) 0.1-10.0wt.% polymerizable ultraviolet ray stabilizing monomer, (b) 5.0-97.9wt.% polymerizable unsaturated monomer containing a crycloalkyl group, (c) 2.0-35.0wt.% polymerizable unsaturated monomer having hydroxyl group, (d) 0-10.0wt.% polymerizable ultraviolet ray-absorbing monomer and (e) 0-92.9wt.% other polymerizable unsaturated monomer [with the proviso that total amount of these components (a) to (e) is 100wt.%] and a polyisocyanate compound.

Heat-resistant adhesive composition

Abstract: The present invention provides a heat-resistant adhesive composition comprising mainly 1) a polycarbodiimide resin and an epoxy resin, or 2) a polycarbodiimide resin, an epoxy resin and a curing agent for the polycarbodiimide resin, or 3) a polycarbodiimide resin, an epoxy resin and a curing agent for the epoxy resin. Said heat-resistant adhesive composition can be applied under mild conditions, has excellent heat resistance and chemical resistance, and is superior in adhesion strength particularly at high temperatures.

Polyphenylene ether/polyamide blends containing inorganic, plate-shaped fillers

Abstract: Resin compositions comprising : (A) 10-80 parts by weight of a polyphenylene ether resin, (B) 90-20 parts by weight of a polyamide resin, and (C) 3-70 parts by weight of an inorganic filler whereby : (1) the average particle size is no more than 5 µm and the aspect ratio is at least 3, and (2) the difference in the crystallization initiation temperature of a composition comprising 90 wt% of polyamide resin and 10 wt% of inorganic filler, and the crystallization initiation temperature of the polyamide resin is no more than 5°C, have excellent surface smoothness; a high rigidity, a small linear expansion coefficient, good impact resistance, heat resistance and chemical resistance.

Water Resistance of Poly(imide-siloxane) Adhesives: An IGC Surface Energetics Study

Abstract: Inverse Gas Chromatography was utilized to examine the interaction of water vapor with the surfaces of a polyimide homopolymer and poly(imide-siloxane) random-block copolymers of increasing siloxane content. The studies employed 45-60 meter, thin-polymer-film mega-bore capillary columns to maximize surface area. The free energies of specific surface interaction with water and the dispersive components of the solid surface free energies were determined. An increase in the polymer siloxane content from 0-wt% to 10-wt% resulted in a decrease of approximately 4 kJ/mol in the free energy of water-specific surface interaction. A further increase in siloxane content to 30-wt% was not found to increase surface water resistance significantly. Dispersive components of the solid surface free energies of the copolymers were comparable to values reported for poly(dimethylsiloxane) homopolymer.

Bluing method of plastic lens

Abstract: PURPOSE:To obtain a colorless and transparent plastic lens excellent in resistance to impact and heat, etc., by combining specific pigment-based dyeing agents with a specific radical-polymerizable unsaturated double bond-contg. compound followed by polymerization to effect the curing. CONSTITUTION:An aliphatic, alicyclic or aromatic compound containing radical- polymerizable unsaturated double bond with e.g. methacryloyl, acryloyl, allyl, methallyl or vinyl group in the molecule is incorporated with a pigment-based cobalt blue dyeing agent and quinacridone-based dyeing agent (e.g. quinacridone red-based one) followed by polymerization in the presence of a catalyst, e.g. under heating, to effect the curing, thus obtaining the objective colorless and transparent plastic lens excellent in impact resistance, heat resistance, surface hardness and chemical resistance.

Antistatic covering material composition

Abstract: PURPOSE:To obtain the title composition capable of forming a cross-linked hardened film excellent in abrasion resistance, chemical resistance, durability, weatherability and antistatic properties by using colloidal silica, an organoalkoxysilane and a polyfunctional acrylate as the principal constituents and adding a specified antistatic agent thereto. CONSTITUTION:The title composition consists of colloidal silica comprising silica particles having a primary particle diameter of 1-200mum, an organoalkoxysilane, a polyfunctional monomer containing at least three (meth) acryloyloxy groups in the molecule, and a quaternary ammonium salt of formula I [wherein X is a group of, e.g. formula II, III or IV, or a (substituted) monovalent hydrocarbon group; R is a (substituted) monovalent hydrocarbon group; Y is anion; R and R are each H or a monovalent hydrocarbon group; R , R and R are each a (substituted) divalent hydrocarbon group; and a is 1 or 2]. By applying this composition to a synthetic resin molding and irradiating with actinic radiation, a hardened coating film having permanent antistatic properties and abrasion resistance and excellent transparency, adhesion to a base material, chemical resistance, etc., can be formed.

The synthesis of urushiol titanium chelate polymers and their structural characteristics

Abstract: The synthetic method and structural characteristics of urushiol-titanium chelates (UT) and urushiol-titanium chelate polymer for anticorrosive coatings have been studied.Two kinds of coating films made from UT polymer show excellent physico-mechanical properties and possess good chemical resistance to strong acids and alkalis, many kinds of salt solutions and organic solvents, stable at high temperature.

Thermoplastic resin composition comprising a polyester, a polycarbonate and a copolymer of an olefin rubber

Abstract: A thermoplastic resin composition comprising 1 to 300 parts by weight of a copolymer (A) which is obtainable by polymerizing 0.1 to 400 parts by weight of an unsaturated epoxy monomer and 0 to 1,000 parts by weight of other copolymerizable monomer in the presence of 100 parts by weight of an ethylene-α-olefin base rubber, and 100 parts by weight of a mixture comprising 90 to 10% by weight of a polycarbonate resin (B) and 10 to 90% by weight of a saturated polyester (C), which can give a molded article having improved balance among heat resistance, chemical resistance, impact resistance and a shrinkage factor; falling ball impact resistance; weld strength; and appearance.

Method of adhering adherends

Abstract: The present invention provides a method of adhering adherends, including (i) providing at least two adherends at least one of which is made of a flexible material, and (ii) joining the adherends together to form a structure using a heat-resistant adhesive composition containing mainly 1) a polycarbodiimide resin and an epoxy resin, or 2) a polycarbodiimide resin, an epoxy resin and a curing agent for the polycarbodiimide resin, or 3) a polycarbodiimide resin, an epoxy resin and a curing agent for the epoxy resin. The heat-resistant adhesive composition can be applied under mild conditions, and the resultant structure has excellent heat resistance and chemical resistance, and has superior adhesion strength particularly at high temperatures.

Polystyrene resin composite

Abstract: PURPOSE:To provide a resin composite which is excellent in heat resistance, chemical resistance, and electrical characteristics, does not need to control the iodine-releasing process, and exhibits thermal and storage stabilities by causing a monomer or iodine to exist in the crystalline phase of a specific syndiotactic styrene polymer. CONSTITUTION:A resin composite which comprises a syndiotactic styrene polymer consisting of structural units of the formula (wherein R is H, halogen, C, Sn or Si and m is 1-5 provided that when m is two or higher, then the R 's may be the same or different) and having a high stereoregularity and a wt.- average mol.wt. (in terms of PS) of 500-5,000,000 and a monomer or iodine contained in the crystalline phases of the polymer is prepd. e.g. by producing an amorphous styrene polymer using a transition metal/aluminoxane catalyst, forming the amorphous polymer in a molten state into a composite, and quenching the resulting composite by keeping it below the m.p. and above the cold crystallization temp.

Magnetic powder composition covered with resin

Abstract: PURPOSE:To get a composition excellent in heat resistance, moisture resistance, chemical resistance, and mechanical strength without causing mold scuffing by mixing a solid lubricant to magnetic powder covered with resin where thermo plastic resin having crystal property and heat resistance covers or adheres to magnetic powder. CONSTITUTION:0.1-6wt.% thermoplastic resin, which has crystal property and heat resistance, covers or adheres to 91.0-99.89wt.% magnetic powder such as ferrite powder, etc. The thermoplastic resin used here has a repeat unit shown by the formula, and besides the extreme viscosity at 60 deg.C with p- chlorophenol as a solvent is 0.2dl/g or more. Next, 0.01-3.0wt.% solid lubricant such as Teflon, etc., is mixed in this magnetic powder covered with resin. Hereby, a composition excellent in heat resistance, moisture resistance, chemical resistance, and mechanical strength can be obtained without causing mold scuffing.

Glass fiber-reinforced thermoplastic resin composition

Abstract: PURPOSE:To provide a glass fiber-reinforced thermoplastic resin compsn. excellent in mechanical strengths such as impact resistance and flexural modulus of elasticity, good in heat resistance and chemical resistance, and high in hardness by dispersing glass fibers in an impact-resistant polystyrene resin and polypropylene with good adhesion therebetween. CONSTITUTION:The title compsn. comprises 50-95wt.% (a) impact-resistant polystyrene copolymer and/or impact-resistant polystyrene compsn., 5-50wt.% (b) polypropyrene resin contg. at least 1wt.% polypropylene modified with an unsatd. carboxylic acid or its anhydride, and 5-70 pts.wt., based on 100 pts.wt. of the sum of (a)+(b), of glass fibers.

Laminating material containing soft fluororesin

Abstract: PURPOSE:To provide a laminating material, in which the excellent characteristics of a polyamide resin are utilized and which is superior even in chemical resistance such as methanol resistance, acid resistance, etc. CONSTITUTION:A layer composed of a soft fluororesin and/or a polyvinylidene fluoride resin and a layer consisting of a polyamide resin are heat-fused through the three-component mixed resin layer of the polyvinylidene fluoride resin, the soft fluororesin and polyamide. A laminating material comprising the soft fluororesin can be manufactured only through heat fusion without requiring the pre-treatment of a base material, thus easily molding a tube and a hose through co-extrusion molding, then acquiring the laminating material having excellent sour gasoline resistance, acid resistance and methanol resistance.

Laminating material containing flexible fluororesin

Abstract: PURPOSE:To obtain laminating material excellent in chemical resistance such as methanol resistance and acid resistance by making the best use of the excellent characteristics of polyamide resin. CONSTITUTION:A layer constituted of flexible fluororesin and/or copolymerized vinylidene fluoride resin and a layer constituted of polyamide resin are thermally melt-stuck via a resin layer mixed with three components of copolymerized vinylidene fluoride resin, flexible fluororesin and polyamide. Since the laminating material containing flexible fluororesin is produced by only thermal melt-sticking in dispersing with pretreatment of base material, a tube and a hose are easily molded by coextrusion molding. The laminating material excellent in resistance to sour gasoline, acid resistance and methanol resistance is obtained.

Heat-resistant transparent container improved in chemical resistance

Abstract: PURPOSE:To obtain a heat-resistant transparent container improved in chemical resistance by molding a composite stock consisting of a layer of a material (modified polyester) prepared by mixing a polyester carbonate resin and a thermoplastic polyester resin in a heated molten state. CONSTITUTION:A modified polyester resin is a material prepared by mixing a polyester carbonate resin and a thermoplastic polyester resin in a molten state and characterized by that the crystallizing temps. and glass transition points Tg of the respective raw material resins are changed by mixing both resins in a molten state. A polycarbonate resin is based on a polymer obtained using 2,2-bispropane and carbonyl chloride or diphenyl carbonate as starting raw materials. A heat-resistant transparent container is formed from the outer layer 1 of the polycarbonate resin and the inner layer 2 of the modified polyester resin. The inner layer is excellent in chemical resistance and oil resistance and the outer layer is excellent in mechanical strength, heat resistance and impact resistance.

Polystyrene-based resin composition, inner wall material for refrigerator and container for oily food

Abstract: PURPOSE:To obtain the subject composition suitable for an inner wall material for refrigerators, a container for oily foods, etc., having excellent flexural elasticity, impact resistance, heat resistance, chemical resistance and oil resistance, comprising a rubber-modified PS-based resin, a polyolefinic resin and a specific copolymer in a specific ratio. CONSTITUTION:The objective composition comprising (A) 45-80wt.% rubber- modified PS-based resin, (B) 15-45wt.% polyolefinic resin and (C) 3-25wt.% hydrogenated triblock copolymer which is a hydrogenated triblock copolymer prepared by hydrogenating >=70wt.% double bond of isoprene block part composed of a triblock copolymer consisting of styrene block-isoprene block-styrene block, having 10,000-400,000 number-average molecular weight and 40-70wt.% weight ratio of styrene block part.

Thermoplastic resin composition and molding produced therefrom

Abstract: PURPOSE:To obtain the subject composition giving a molding having excellent impact resistance, chemical resistance and thermal deformation resistance by compounding an aromatic polyester resin with a copolymer produced by grafting a polyfunctional monomer and an acrylic acid ester to a conjugated diene polymer. CONSTITUTION:The objective thermoplastic resin composition giving a molding having excellent impact resistance, chemical resistance and thermal deformation resistance and useful as a molding material, etc., can be produced by compounding (A) 45-99wt.% of a graft copolymer produced by dividedly polymerizing a polymerizable monomer for forming a rigid resin in the presence of a graft polymer rubber obtained either by the emulsion polymerization of a conjugated diene polymer and a polymerizable monomer mixture containing a polyfunctional monomer and an acrylic acid ester or by the emulsion polymerization of the polymerizable monomer mixture until the polymerization ratio reaches the range of 50-93wt.% with (B) 55-1wt.% of a thermoplastic aromatic polyester resin.

Low-temperature-curing water-base coating composition and method of forming coating film

Abstract: PURPOSE:To obtain the title composition which can form a coating film excellent in the adherence to a base material and a top coat, chemical resistance and hardness by using a resin containing specified groups and a specified modified polyisocyanate compound as the constituents. CONSTITUTION:The title composition comprises a resin containing hydroxyl, carboxyl and amido groups [e.g. a copolymer of hydroxyethyl(meth) acrylate, (meth)acrylic acid, N-methylol(meth)acrylamide and methyl (meth)acrylate], and a polyisocyanate compound modified with an alkylene glycol, and contains at least 4 blocked isocyanato groups in the molecule. The composition has such excellent properties that it can be cured at a relatively low temperature and gives a coating film having high surface gloss, high surface hardness, good chemical resistance and good adherence to a top coating material.

Flame retardant coating laminate

Abstract: PURPOSE: To provide a coating laminate which has excellent recording characteristics while holding high heat resistance, hydrolytic resistance, mechanical characteristics, chemical resistance, etc., in a normal polyester film and in which high flame retardance can be imparted, and ranks of UL-94, VTM-2 can be sufficiently performed. CONSTITUTION: A coating laminate comprises a coating layer containing inorganic and/or organic particles and a polymer binder and provided on a support, wherein the coating layer contains a graft copolymer acrylic resin having a main chain of the binder made of a hydrophobic monomer and a branched chain made of a hydrophilic monomer and a cationic polymer as main ingredients, and the support is a polyester film in which linear polyesters A, C having a flame retardant element of 0.5-5.0wt.% and a linear polyester B having a flame retardant element of less than 0.5wt.% are sequentially laminated in a thickness direction in the order of A/B/C. COPYRIGHT: (C)1995,JPO

Aromatic polymer blends and method

Abstract: Flame retardant blends of poly(aryloxysiloxane) and organic polymers such as polyethers, polyesters, polyetherimides and terpolymers of acrylonitrile-butadiene-styrene are provided. In many instances, the flame retardant blends exhibit improved chemical resistance, impact resistance and have an improved heat deflection temperature as compared to the original polymeric materials.