109results about How to "Excellent hot water resistance" patented technology

PCT No. PCT/JP97/03131 Sec. 371 Date Mar. 19, 1998 Sec. 102(e) Date Mar. 19, 1998 PCT Filed Sep. 5, 1997 PCT Pub. No. WO98/09813 PCT Pub. Date Mar. 12, 1998The present invention provides a container for retort packaging comprising a laminated film having an outermost layer comprising a layer formed of a cross-linked structure containing ester bonds between poly(meth)acrylic acid (A) and polyalcoholic polymer (B); a resin composition having at least the chemical structures (X) [poly(meth)acrylic acid (A) residue], (Y) [poly(meth)acrylic acid (A)-polyalcoholic polymer (B) residue] and (Z) [metal cross-linked ionic residues], wherein the degree of esterification defined by the equation: degree of esterification=c/(b+c+d) is from 0.01 to 0.5 and the degree of ionization defined by the equation: degree of ionization=c/(b+c+d) is from 0.01 to 0.9 (wherein b, c and d represent the molar ratios of the carbon-oxygen double bond in the chemical structure of the resin composition; and a gas barrier film comprising the same.

Provided is a film which can be industrially coated easily and exhibits excellent gas barrier performance without being subjected to a high-temperature heat treatment. The film exhibits good gas barrier performance immediately after the production, and maintains the excellent gas barrier performance while exhibiting excellent hot water resistance and printing resistance. More specifically, provided are: a gas barrier laminated film including a resin layer on an inorganic thin film formed on at least one surface of a support film, the resin layer being formed by applying: (1) an aqueous dispersion containing polyvinyl alcohol (a), an ethylene-unsaturated carboxylic acid copolymer (b), and inorganic particles (c); (2) an aqueous dispersion containing an ethylene-unsaturated carboxylic acid copolymer (b), inorganic particles (c), and/or a cross-linking agent (d); or (3) an aqueous dispersion containing polyvinyl alcohol (a), an ethylene-unsaturated carboxylic acid copolymer (b), inorganic particles (c), and a cross-linking agent (d), to the inorganic thin film surface; and a method of producing the gas barrier laminated film.

The object is to provide a vitreous antimicrobial agent that can exhibit excellent antimicrobial properties when added to various types of resins, that has excellent discoloration resistance and hot water resistance, and that can easily be produced at a commercial scale. It is also to provide an antimicrobial resin composition and an antimicrobial product including the vitreous antimicrobial agent.

The present invention relates to a vitreous antimicrobial agent that includes, relative to 100 mass % of total glass components, 0.1 to 2 mass % of Ag₂O, 40.5 to 49 mass % of ZnO, 6 to 9.5 mass % of SiO₂, 30.5 to 39.5 mass % of B₂O₃, 2 to 10 mass % of an alkaline earth metal oxide, and 6 to 7.5 mass % of Na₂O; a vitreous antimicrobial agent comprising, in addition to these, 0.01 to 5 mass % of CeO₂ as necessary; an antimicrobial resin composition that includes the vitreous antimicrobial agent; and an antimicrobial product that includes the vitreous antimicrobial agent.

The invention discloses a flame-retardant polyolefin resin composition and a preparation method thereof, and a flame-retardant tubular product prepared from the flame-retardant polyolefin resin composition. The flame-retardant polyolefin resin composition disclosed by the invention comprises the following components in parts by weight: 100 parts of polyolefin resin, 30-85 parts of antimony bromine composite flame retardants, 2-20 parts of resin modifiers and 0.3-1.5 parts of processing agents. The tubular product prepared from the flame-retardant polyolefin resin composition disclosed by the invention has the advantages of being high in heat resistance (the vicat softening temperature of the material can be up to over 140 DEG C), high in flame retardant property (the oxygen index is greater than over 32), good in hot water resistance, low temperature resistance and long-term static hydraulic performance, long in service life, free of scaling and the like, the vertical combustion can be up to V0 grade, the smoke density SDR is smaller than 75, the damaged tubular product caused by external force can be connected in a hot melting manner, and the flame-retardant tubular product can be applied to products such as a central air conditioning pipe system, industrial water supply and drainage pipelines and the like.

The invention relates to a preparation method of a fiber with high water absorption, which is a method for preparing the fiber with high water absorption by a post-crosslinking agent. According to the preparation method, the fiber with high water absorption is prepared from acrylic acid (AA) and acrylamide (AM) which are partly neutralized and taken as polymerized monomers through the steps of: blending the polymerized monomers with polyving akohol (PVA), initiating by potassium persulfate (KPS), blending and polymerizing in an aqueous solution, adding a dialdehyde solution to obtain a mixed solution serving as a post-crosslinking agent solution, mixing to be uniform and defoaming to obtain a spinning stock solution; dry-wet spinning the spinning stock solution to form a nascent fiber; and heat-treating the nascent fiber at a certain temperature to generate a crosslinking reaction, thereby forming the three-dimensional net-structured fiber with high water absorption. According to the preparation method, the implosion phenomenon which easily occurs during polymerization of the traditional polymer solution with high water absorption is avoided, the preparation technology is simple and safe, the production cost is reduced, and the production efficiency is increased; and the obtained water-absorbing fiber has high and controllable water adsorption, thermostability, capability of being repeatedly used, and long residual action.

The protein fiber spinning solution is produced by using animal and plant material and through the processes of acid pickling, extraction, pH regulation to obtain protein curd, dissolving with cosolvent to form water solution, mixing, modifying side chain of amino acid with modifying agent, copolymerization with coloring monomer, mixing with PVA water solution and addition crosslinking agent to regualte viscosity. It may be used in spinning fiber with the same strengt has chemical fiber, the skin friendship, air penetrability and hygroscopicity the same as natural protein fiber, and improved hot water resistance, shrinkage and color.

An object of the present invention is to provide a biaxially oriented film suitable as a reinforcing member for an electrolyte membrane of a polymer electrolyte fuel cell, the film having excellent hot water resistance in a high-temperature and high-humidity use environment and being capable of maintaining the reinforcing effect for a prolonged period of time. The invention resides in a biaxially oriented film for reinforcing an electrolyte membrane of a polymer electrolyte fuel cell, the film being characterized in that the film (i) contains syndiotactic polystyrene as a major component and (ii) has a Young's modulus in at least one of the machine direction and the transverse direction ranging from 4,500 to 8,000 MPa.

The present invention provides a resin composition including an ethylene-vinyl alcohol copolymer (EVOH) and a polyamide resin and having outstanding properties in terms of long-term run stability, appearance, and hot water resistance in melt molding. In this resin composition, 70 mol % or more of all the terminal ends of the polyamide resin are blocked with units including an imide structure. At least a portion of the units containing an imide structure may be units containing a cyclic imide structure.

A hot water resistant polyamide thin layer. An undercoating layer containing polyurethane resin with a film extensional proportion of above 250% and a tensile strength of above 20 MPa is formed on at least one side of a polyamide substrate thin layer containing 0.01-0.2 wt% of hindered phenolic compounds.

The invention relates to cross-linking type polyarylene ether nitrile and a preparation method thereof, belonging to the field of special high-polymer materials. The cross-linking type polyarylene ether nitrile is a polyarylene ether nitrile thermo-solid with a phthalocyanine ring as a crosslinking point. The preparation method for the cross-linking type polyarylene ether nitrile comprises the following steps: preparing polyarylene ether nitrile containing a carboxyl group in its side chain and terminated by a hydroxyl group; then reacting the polyarylene ether nitrile with 4-nitrophthalonitrile so as to obtain nitrophthalonitrile-terminated polyarylene ether nitrile containing the carboxyl group in its side chain; then reacting the polyarylene ether nitrile obtained in the previous step with 3-aminophenoxyl phthalonitrile so as to obtain polyarylene ether nitrile containing phthalonitrile groups in its side chain and terminal; and subjecting the polyarylene ether nitrile obtained in the previous step to processing and molding and then to self-crosslinking at high temperature so as to obtain the cross-linking type polyarylene ether nitrile. The cross-linking type polyarylene ether nitrile has good heat resistance, a glass-transition temperature of 300 DEG C or above and an initial decomposition temperature of 500 to 600 DEG C. The cross-linking type polyarylene ether nitrile is applicable as a high-temperature-resistant structural material and a flame-retardation material to the fields of aviation and spaceflight.

The invention belongs to the field of high polymer materials, and particularly relates to polyaryl ether nitrile resin, a polyaryl ether nitrile film and a preparation method thereof. The structure of the polyaryl ether nitrile resin is represented by formula I: n=40-80, m=10-20. Cross-linking groups are arranged at the chain end of the polyaryl ether nitrile resin, and the polyaryl ether nitrile resin has good curing reaction activity and can be used for preparing a corresponding polyaryl ether nitrile film. The polyaryl ether nitrile film is good in heat-resistant performance, the glass-transition temperature is 200 DEG C to 240 DEG C, the initial decomposition temperature is 560 DEG C to 580 DEG C, and carbon residue rate of thermal decomposition in nitrogen atmosphere at 800 DEG C is more than 69%. The polyaryl ether nitrile film is good in toughness, the elongation at break of the polyaryl ether nitrile film ranges from 8% to 12%, tensile strength is excellent, the tensile strength of the polyaryl ether nitrile film ranges from 80 MPa to 100 MPa.

A method for forming a film, containing the following steps (1) to (4), and a film obtained by the method for forming a film: step (1): preparing an aqueous dispersion liquid containing (A) a hydrophilic functional group-containing resin, (B) an ammonium salt, and (C) a nonionic thickener, a mixed amount of the component (B) being from 0.25 to 10 parts by mass per 100 parts by mass of a solid content of the component (A); step (2): coating the aqueous dispersion liquid on at least one surface of a substrate to form a coated film; step (3): subjecting the coated film to a thermal gelation treatment to form a gelled film; and step (4): drying and solidifying the gelled film to form a film.

There is provided a polyamide-based laminated film with a multi-layered structure including 5 or more layers, comprising (a) an aromatic polyamide layer, (b) an aliphatic polyamide layer and (c) a layer made of a mixture containing an aromatic polyamide and an aliphatic polyamide at a weight ratio of 5:95 to 20:80, said layer (c) being disposed adjacent to the layer (a) and/or the layer (b), and said film having 5 or less pinholes per 497 cm <2> as measured after subjecting the film to 3000 cycles of repeated flexing operation at a temperature of 23 DEG C and a relative humidity of 50%, using a Gelboflex tester. The polyamide-based laminated film is free from interlaminar peeling between the aliphatic polyamide layer and the aromatic polyamide layer, and can exhibit excellent properties including an oxygen gas-barrier property, a flex/pinhole resistance, a transparency, a heat resistance and a toughness. The polyamide-based laminated film in which at least one layer of the film is a polyamide-based resin layer containing a hindered phenol-based antioxidant in an amount of 0.01 to 0.5% by weight, and a thickness of the polyamide-based resin layer is 10% or more but less than 80% of a whole thickness of the film, the resultant laminated film is further excellent in hydrothermal resistance and adhesion to other plastic films and, therefore, can be suitably used as a packaging material for foods, medical products and drugs or chemicals which tend to be deteriorated in quality upon exposure to oxygen.

An UV polishing and priming-free UV coating is prepared by raw materials in parts by weight as follows: 35-40 parts of epoxy acrylate, 20-25 parts of polyether acrylate, 10-12 parts of trimethylolpropane triacrylate, 5-8 parts of isobornyl acrylate, 1-2 parts of triethanolamine, 3-4 parts of tert-amylphenol, 1-3 parts of tetraethylammonium tetrafluoroborate, 2-4 parts of benzyltriphenylphospho, 1-2 parts of trifluoro acetyl acetone, 4-5 parts of 2,4,6-trimethyl benzoyldiphenyl phosphine oxide, 2-3 parts of benzil dimethyl ketal and 4-5 parts of a dispersing auxiliary. The UV coating has excellent water resistance, hot water resistance, drug resistance, caking property, toughness and flame retardant property, has excellent binding property with printing ink, and has the characteristics of high glossiness, good levelling property, small flavor, good wear resistance and the like; and only one procedure is required when UV gloss oil is adopted for UV polishing, the priming step is omitted, the operation cost is saved, and the work efficiency is improved.

The present invention relates to crosslinked polyvinyl alcohol raw cord and method for producing the same, and more particularly, to crosslinked polyvinyl alcohol fiber, in which PVA resin having a degree of polymerization of more than 1,000 and a degree of saponification of more than 97.0 mol % is dissolved in dimethyl sulfoxide, the solution is subjected to dry and wet gel spinning using methanol as a coagulation solution, drawn and thermally treated, the resulting polyvinyl alcohol drawn yarn with 500-3,000 deniers is twisted to produce a cabling yarn, the cabling yarn is plied into a 2-ply or 3-ply yarn to produce a raw cord, the raw cord is wound on a bobbin for crosslinking and crosslinked in an aqueous crosslinking solution containing an aromatic aldehyde compound and an acid catalyst. Moreover, the present invention relates to a crosslinker-introducing apparatus, which is used in the above method and can effectively induce the crosslinking reaction of the wound raw cord.

The hard coat layer-forming composition of this invention includes (A) composite oxide fine particles with a mean particle diameter of 1 to 200 nm, containing titanium, tin and optionally silicon, and with a rutile-type crystal structure, (B) an organosilicon compound represented by the formula R¹_aR²_bSi(OR³)_4−(a+b) and/or a hydrolyzate thereof, and (C) a cyanamide derivative compound. A hard coat layer formed from the composition not only is excellent in transparency, scratch resistance, adhesion property, weathering resistance, impact resistance, etc. but also can enjoy no coloration or little coloration, particularly in bluing or yellowing, upon exposure to or irradiation with ultraviolet rays, even if an antireflection film is provided.