1041results about How to "Improve heat stability" patented technology

Disclosed are branched polyphosphonates produced via a superior transesterification process, and methods related thereto. These branched polyphosphonates exhibit a unique and advantageous combination of properties, such as outstanding fire resistance, improved heat stability, improved toughness, and superior processing characteristics. Also disclosed are polymer compositions that comprise these branched polyphosphonates and at least one other polymer, wherein the resulting polymer compositions exhibit flame retardant properties. Further disclosed are articles of manufacture produced from these polymers, such as fibers, films, coated substrates, moldings, foams, fiber-reinforced articles, or any combination thereof; these articles may be coated with a moisture barrier to enhance their moisture resistance properties.

Provided is a method of producing a denatured whey protein which has an improved heat stability without using an additive such as an organic solvent. Also provided is a denatured whey protein produced by this method. A method of producing a denatured whey protein which comprises contacting and mixing a whey protein solution with a whey protein solution that is flowing as a thin film in the form of a rotating cylinder, and thus shearing the same at a temperature ranging form 76 to 120° C. at a shear speed of 5,000 s⁻¹ to 25,000 s⁻¹ for 8 minutes to 0.1 second; and a denatured whey protein obtained by this method.

A nanocomposite concentrate composition comprising about 10 weight percent to about 90 weight percent of a layered silicate material and about 10 weight percent to about 90 weight percent of a matrix polymer comprising about 90-99.8% by weight of a polyolefin and about 0.2% to about 10%, preferably about 0.2% to about 3%, more preferably about 1% to 3% by weight, of a maleic anhydride-modified polyolefin, based on the total weight of polyolefins, wherein the layered silicate material is dispersed uniformly throughout the matrix polymer. Shearing of the concentrate and later (after shear) addition of an added matrix polymer avoids thermal degradation of the added matrix polymer and optimizes the dispersion of the nanomer throughout the matrix polymer; provides increased tensile strength; and reduces degradation of the polymer by melt formation of a concentrate thereby decreasing heat degradation of added matrix polymer.

The invention discloses an organic/inorganic composite porous isolating membrane, which comprises a porous substrate with holes, and an organic/inorganic composite layer arranged on at least one surface or a partial surface area of the porous substrate, wherein the organic/inorganic composite layer is a layer of a mixture of inorganic particles and adhesive polymer; the inorganic particles are interconnected and are fixed through the adhesive polymer; and gaps among the inorganic particles form holes. In the organic/inorganic composite layer of the organic/inorganic composite porous isolating membrane, a weight ratio of the inorganic particles with good thermol stability to the adhesive polymer is between 80 percent: 20 percent and 99.5 percent: 0.5 percent; and the organic/inorganic composite layer has good supporting function. Therefore, the organic/inorganic composite porous isolating membrane has high thermo-mechanical stability.

It is an object of the present invention to provide a polylactic acid composition having excellent crystallinity, wet heat stability and melt stability. It is another object of the present invention to provide a molded article which is obtained from the polylactic acid composition and excellent in appearance and color. The present invention is a composition and molded article thereof which comprises a polylactic acid (component A), a carbodiimide compound (component B) and a phosphoric acid ester metal salt (component C).

The invention relates to a Cu-Al2O3 nanometer dispersion strengthening alloy and preparation thereof. The preparation includes the steps of Cu-Al alloy vacuum smelting, pulverizing, screening, internal oxidizing, hydrogen reducing, vacuum hot pressing, canned hot extruding, etc. Comparing with oxygen-free copper, sigma of the alloy of the invention is 2 to 6 times higher that of the oxygen-free copper, the anti-annealing softening temperature is up to over 900 DEG C, the conductivity is up to 96% IACA and more. The process of the invention is simple, the prepared Cu-Al2O3 nanometer dispersion strengthening alloy has high strength, high conductivity, electrical conductivity higher than 96% IACA, and is anti-annealing and antimagnetic. The alloy can not only used for large-scale integrated circuit lead frame, manufacturing of controlled thermonuclear reaction heat sink components, and is expecially suitable for manufacturing of microwave tube grid mesh, inertial instrument sensor, particle accelerator and other high-precise parts.

The invention provides emulsion cream and a preparing method thereof. The emulsion cream is prepared from, in units of the total weight of emulsion cream, 0.1-10% of an emulsifying agent, 0.5-25% of a humectant, 0.01-1% of an aqueous-phase thickening agent, 0.1-10% of an oil-phase thickening agent, 1-30% of fluid oil, 0.01-5% of a skin conditioner and 20-85% of water, and preferably, the emulsion cream is prepared from 3-6% of the emulsifying agent, 5-15% of the humectant, 0. 1-0.5% of the aqueous-phase thickening agent, 1-6% of the oil-phase thickening agent, 10-15% of the fluid oil, 0.5-2% of the skin conditioner and 55.5-80% of the water. The emulsion cream is free of silicone oil, mild, easy to degrade in the human body, free of accumulation, environmentally friendly, nontoxic and harmless and has good emulsifying capacity and does not stimulate the skin.

A crosslinkable, pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.

The invention relates to edible molded bodies in the form of a flat or tubular film based on plastifiable biopolymers, the cleavage products or derivatives thereof and/or synthetic polymers from natural monomers, characterized in that they are produced according to a method comprising the following steps: a) the biopolymers, cleavage products or derivatives thereof and/or synthetic polymers are mixed with at least one edible plasticizer, at least one lubricating agent and at least one cross-linking agent, b) the mixture thus obtained is melted into a thermoplastic material, c) said material is extruded and d) the product obtained by extrusion is calendered and/or stretched or blown and deformed into the edible molded body. The molded bodies cited in the invention are suitable for use as food wrappers for sausages and boiled ham, and are particularly suitable for use as seamless sausage casings.

The invention provides a graphene heating film and a preparation method thereof. The graphene heating film is characterized by comprising a first insulated waterproof layer, an electrode layer, a heating film layer and a second insulated waterproof layer, wherein the first insulated waterproof layer, the electrode layer, the heating film layer and the second insulated waterproof layer are pasted into an integral structure; and the heating film layer is a graphene film. The preparation method of the graphene heating film comprises the following steps: (1) fabricating the graphene film; (2) covering the second insulated waterproof layer with a bonding adhesive; (3) bonding the second insulated waterproof layer and the graphene film into a whole; (4) removing a metal substrate on the graphene film; (5) pasting the electrode layer on the graphene film; (6) pasting the first insulated waterproof layer on the electrode layer; and (7) connecting the electrode layer and a lead wire. According to the graphene heating film and the preparation method thereof provided by the invention, the heating efficiency is high; large-area transferring of the graphene film can be achieved; the transfer time is short; and the transfer rate is high.

The invention discloses a cation amino silicone oil micro-emulsion and a preparation method thereof. The cation amino silicone oil micro-emulsion is prepared from the following components in percentage by weight: 5-30% of organo-siloxane monomer, 0.1-0.5% silane coupling agent, 3-10% of cationic emulsifier, 2-8% of nonionic emulsifier, 0.1-0.5% of basic catalyst and the balance of water, and the total weight percentage of all the components is 100%. The particle size of the cation amino silicone oil micro-emulsion prepared by using the method is 50-100nm, which is very small. The solid content of the cation amino silicone oil micro-emulsion is 10-36%. The cation amino silicone oil micro-emulsion has excellent shear stability, heat stability and storage stability, and is a favorable softener for finishing natural fibers, such as textiles made of cotton, hemp, silk, wool and the like, and synthetic fibers, such as polyester, polyamide and polypropylene ester.

The invention discloses a preparation method of a high temperature resistant non-halogen fire resistant ultraviolet curing solder resist ink, belonging to the technical field of the solder resist ink for the printed circuit board. The innovation of the method is that radiation curing nitrogen-containing phosphide is introduced in the formula of the solder resist ink to be used as the non-halogen flame retardant; beta-hydroxyethyl acrylate modified melamine-formaldehyde resins and acrylate modified novolac epoxy resins are complexed to form the base resins, the base resins are mixed with a reactive monomer, a photoinitiator, a color paste, a filler and an additive, the mixture is used to perform mixing, grinding, filtration and other working procedures and prepare the high temperature resistant non-halogen fire resistant ultraviolet curing solder resist ink. The solder resist ink prepared by the method is characterized by high temperature resistance, high flame resistance, high hardness and no halogen and is mainly suitable for the lead-free soldering technology and lead-free tin blowing (hot air leveling) technology of the printed circuit board.

The invention provides a diaphragm, a preparing method of the diaphragm and a lithium ion battery comprising the diaphragm. The diaphragm comprises a polymer substrate and slurry layers positioned at the inside and on the surface of the substrate; each slurry layer comprises ceramic particles and curing resin; the curing resin is obtained through performing cross-linking and curing reaction on curing agents or initiating agents positioned inside the substrate and cross-linking resin positioned in the slurry layers; the high-temperature-resistant performance of the diaphragm is excellent; a heat-resistant layer cannot easily fall; and the winding, the preparation and the practical application are easier.

The invention relates to a resin composition which mainly comprises epoxy resin, a hardening accelerator, a cross-linking agent and phosphorus-containing resin, wherein the phosphorus-containing resin is bisphenol phenolic resin or phenolic resin substituted by a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide or derivatives thereof. The resin composition can be applied to semi-solidified rubber sheets or insulating layers of circuit boards. In addition, the invention relates to a semi-solidified rubber sheet, a laminating board and a circuit board containing the resin composition.

The invention provides a sulfur-fixing combustion-supporting high-temperature profile control agent, and a preparation method and application thereof. By taking the total weight of the sulfur-fixing combustion-supporting high-temperature profile control agent as 100%, the profile control agent is prepared from the following raw materials in percentage by weight: 3-5% of soft oil sludge, 2-4% of silicon sludge, 1-2% of low sulfur coal powder, 0.8-1.5% of sodium bentonite, 0.5-1.2% of plant fiber particle, 0.2-0.3% of saltpetre powder, 0.1-0.2% of coal gangue powder, 0.2-0.4% of limestone powder, 0.1-0.2% of polyanionic cellulose, 0.08-0.15% of alpha-sodium olefinsulfonate, 0.1-0.2% of sodium tripolyphosphate and the balance of water. The profile control agent has favorable stratum compatibility, causes no damage to the oil reservoir, does not pollute the stratum, and has favorable temperature tolerance; and meanwhile, the profile control agent has sulfur-fixing and combustion-supporting functions, thereby being completely applicable to a profile control technology for a thick oil fireflood chemical profile control gas injection well.

The invention provides a double-wall sandwich structural microcapsule self-repairing rubber and a preparation method thereof, and relates to a rubber and a preparation method thereof. The preparation method comprises the step of sequentially mixing a rubber matrix, stearic acid, zinc oxide, an accelerant, an anti-aging agent, carbon black, paraffin, a double-wall sandwich structural self-repairing microcapsule and a nano mesoporous molecular sieve in proportion, wherein the double-wall sandwich microcapsule is utilized and adopts urea-formaldehyde resin as the wall material, so that the sealing performance is high, and the manufactured walls have moderate hardness; the nano mesoporous molecular sieve utilized as a synergist is naturally inorganic filler which can improve the mechanical performance of the rubber, and a double coating brings higher heat-resisting stability, therefore, the contact probability of a repairing agent and the catalyst is greatly increased, and the influence of excessively added repairing agents and catalysts to the mechanical performance of the rubber can be avoided. Once microcrack appears in the material, a plurality of pores act to improve the capillary siphon effect of the microcrack to the microcapsule, thus the probability of the repairing agent and the curing agent to enter the microcrack is greatly increased, and as a result, the repairing effect is greatly improved.

A positive electrode active material for non-aqueous electrolyte secondary battery composed of a lithium nickel composite oxide having high capacity and superior heat stability, a production method that is suitable for its industrial production, and a non-aqueous electrolyte secondary battery having high safety. The positive electrode active material for non-aqueous electrolyte secondary battery includes a lithium nickel composite oxide having by the following general formula (1):

Li_bNi_1-aM1_aO₂  (1)

(wherein M1 represents at least one kind of element selected from transition metal elements other than Ni, the second group elements and the thirteenth group elements; a satisfies 0.01≦a≦0.5; and b satisfies 0.85≦b≦1.05). The amount of lithium at the surface of the lithium nickel composite oxide is 0.10% by mass or lower. The positive electrode active material is obtained by water washing fired powder at a temperature range of 10 to 40° C., and then filtering and drying the same.

The invention provides a method for preparing sodium lignosulfonate. The method comprises the following steps: (A) providing a lignin suspension; (B) regulating the pH value of the suspension to 4.8-8.5; (C) sequentially adding sodium sulfite and formaldehyde to the suspension with pH value of 4.8-8.5, reacting and filtering to obtain filtrate; (D) mixing the filtrate with a sealant and reacting to obtain sodium lignosulfonate. The method provided by the invention has the advantages that the reaction between lignin and sodium sulfite and formaldehyde is controlled by controlling the adding order of sodium sulfite and formaldehyde; the filtrate obtained through filtering after reaction is reacted with the sealant to react with the free phenol hydroxyl, so that obtained sodium lignosulfonate has good dispersion property, excellent performance when used as the dye dispersant and little textile staining while having high heat stability.

The invention discloses a synthesis method of a high-melting-point polyester hot melt adhesive with better fluidity. The synthesis method comprises the following steps of: (1) carrying out esterification reaction on p-phthalic acid, m-phthalic acid, fatty dicarboxylic acid, ethylene glycol and C3-C6 diol under the action of titanate serving as a catalyst; and (2) adding a stabilizer and a surfactant to the products obtained in the step (1), and carrying out reduced-pressure condensation polymerization reaction to obtain a product, namely the high-melting-point polyester hot melt adhesive with better fluidity. The obtained polyester hot melt adhesive has good adhesion performance, better fluidity when used at high temperature, and excellent wet leveling property.

Prepolymer compositions for preparing a one-part, moisture-curable sealant, adhesive or coating, and a method of making such prepolymer compositions are provided. The prepolymer compositions comprise a polyurethane prepolymer that is end-capped with silane groups or a combination of silane groups and end capping groups that have been derived from an alcohol and an amount, referred to hereinafter as an “excess”, of unreacted aromatic alcohol having a molecular weight of less than 2000. The excess of unreacted aromatic alcohol in the composition is from greater than 0% to 15% by mole of the level of original NCO groups in the prepolymer. From 50 to 100% of the original NCO groups are end-capped with silane groups, and from 0 to 50% of the original NCO groups are end-capped with a end-capping group that has been derived from an aromatic alcohol, an aliphatic alcohol or both. Sealant compositions and coating compositions comprising the present prepolymer composition are also provided.

The clear production method for Cr-free vehicle seat cushion comprises: hair-saving, combing acid and base for expansion; ammonia-free deliming, dipping weak acid and low slat, Cr-free bating, composite batting, and adding strong-absorption fat for dyeing to treat skin from pig, cattle or sheep. The product has shrinkage temperature up to 110Deg, shows well hand feeling and resistance to thermal and age. This invention reduces material quantity and 30-50% sewage discharge, improves absorption rate, and brings a new way for Cr-free leather.

The invention provides a semi-aromatic polyimide material, a preparation method and application thereof, and a gas separation membrane containing the semi-aromatic polyimide material. The semi-aromatic polyimide has a structure shown as a formula I, can be used as a gas separation membrane material, and is obtained by synthesizing a diamine monomer I containing an imide chain link from aromatic dianhydride and aromatic or aliphatic diamine, synthesizing a diamine monomer II containing an imide chain link from alicyclic dianhydride and aromatic or aliphatic diamine, and polymerizing the diaminemonomer I and the diamine monomer II under the action of an initiator. The semi-aromatic polyimide molecular chain provided by the invention has a Troger base structure, and the aromatic ring structure in the main chain is matched with the alicyclic structure, so that the gas separation membrane prepared from the semi-aromatic polyimide molecular chain has good mechanical properties and heat-resistant stability, and has a high permeability coefficient and good selectivity when being used for hydrogen separation and air separation.

The invention discloses a catalyst for the methanation of carbon dioxide. The carrier of the catalyst is composite oxide of rare earth and other metals, and the composition of the catalyst is represented by a general formula of AxByOz, wherein in the formula, A is a rare metal, B is one or two metals from groups IIB, IIIA, VIA, IVB, VB and VIB, x is 0 to 1, y is 0 to 2, and z is 2 to 4; and the active component of the catalyst is nickel, and the nickel loaded on the carrier accounts for 1 to 15 percent of the total weight of the catalyst. Compared with the conventional carbon dioxide methanation technique, the catalyst technique disclosed by the invention, under the similar reaction conditions, can achieve a carbon dioxide conversion rate of 100 percent, a methane selectivity of 100 percent and a methane time space yield of more than 1,000g/kg.h.

The invention discloses a biodegradable composition and a preparation method thereof, which consist of a biodegradable homopolyester (A), a biodegradable copolyester (B) and a chain extender (C), the total weight of which is 100 parts by mass Calculated, containing (A+B) is 95.0~99.9 parts and containing C is 0.1~5.0 parts, wherein the ratio of A:B is in the range of 1:9~9:1. The present invention finds that the compounding of biodegradable homopolyester with faster biodegradation rate and biodegradable copolyester with better processability in different proportions can not only endow the composition with proper biodegradation rate, but also improve the composition The physical properties and processing performance can be properly adjusted according to the requirements of different processing and application fields; we also found that by introducing a chain extender with long chain characteristics into the biodegradable resin composition, the combination after chain extension can be avoided It can prevent unnecessary gel phenomenon during processing and improve the heat resistance and stability of the material.