314 results about "Phenolic antioxidant" patented technology

The invention discloses low-silver lead-free tin-based solder paste and a preparation method thereof, and belongs to the field of welding materials. The soldering paste is composed of 85 wt%-87.5 wt% of tin-based powder brazing filler metal and 12.5 wt%-15 wt% of scaling powder, wherein the tin-based powder brazing filler metal comprises 0.35 wt%-0.6 wt% of Ag, 0.5 wt%-0.8 wt% of Cu, 1.0 wt%-4.0 wt% of Bi, 0.05 wt%-0.08 wt% of Ni and the balance Sn; the soldering flux is composed of rosin, a solvent, an active agent, a thixotropic agent, a film-forming agent, a PH regulator, a surfactant, a phenolic antioxidant and a corrosion inhibitor. The soldering paste has excellent low residue, good wettability and welding reliability, and is especially suitable for surface mount technology (SMT) in the electronic and electric appliance industry.

The present invention provides a pharmaceutical composition, the composition comprises a therapeutically effective amount of bumetanib, one or more specific antioxidants and other necessary one or more pharmaceutically acceptable pharmaceutic adjuvants, and the specific antioxidants are selected from one or more of fat-soluble vitamin C derivatives or phenolic antioxidants. In addition, the invention also discloses a method for improving the stability of the bumetanib pharmaceutical composition. According to the technical scheme, the problems of generation and growth of N-nitroso bumetanib and other related substances in the production and storage process of the bumetanib solid preparation are effectively solved, and the drug stability and the medication safety are remarkably improved.

The present invention provides a hydrogenated nitrile rubber which is excellent in terms of dispersibility and stability of a conductive material dispersion when an electrode for an electrochemical element is produced, which is excellent in terms of peel strength at an electrode and suppression of active material cracking in an electrode after a cycle test, and which is also excellent in terms of output characteristics of an electrochemical element. A hydrogenated nitrile rubber according to the present invention includes a nitrile group-containing monomer unit, and a conjugated diene monomer unit and / or an alkylene structural unit, has a weight average molecular weight (Mw) within the range from 1,000 to 1,000,000 and an iodine value of 100 mg / 100 mg or less, contains a phenolic antioxidant, and has a calcium (Ca) content from 1 ppm to 2,500 ppm, a ruthenium (Ru) content within the range from 0.5 ppm to 50 ppm, a palladium (Pd) content of 200 ppm or less, a magnesium (Mg) content of 50 ppm or less, and a sodium (Na) content of 300 ppm or less.

The invention relates to a method for detecting a phenolic antioxidant through dansyl chloride precolumn derivatization-high performance liquid chromatography-tandem mass spectrometry. The invention relates to a method for detecting a phenolic antioxidant by dansyl chloride pre-column derivatization-high performance liquid chromatography-tandem mass spectrometry, which comprises the following steps: carrying out pre-column derivatization treatment and acid neutralization treatment on a sample to be detected by dansyl chloride to terminate derivatization reaction to obtain a derivatized sample; and determining the derivatization sample by adopting a high performance liquid chromatography-tandem mass spectrometer so as to realize the ultra-trace detection of the phenolic antioxidant in the sample to be detected. The method solves the problem that the existing determination method cannot meet the ultra-trace detection requirement of the phenolic antioxidants, and also solves the problem that the existing determination method is difficult to realize the ultra-trace detection of various phenolic antioxidants.

The invention belongs to the technical field of resin polymerization additives, and particularly relates to an antioxidant type suspended emulsion terminator for PVC (polyvinyl chloride) and a preparation method thereof, the antioxidant type suspended emulsion terminator comprises the following raw material components in parts by mass: 5-30 parts of phenolic antioxidant; 5 to 20 parts of a thioester antioxidant; 0.1-5 parts of an ultraviolet light absorber; 0.1 to 5 parts of a chain terminator; 1-10 parts of a heat stabilizer; 0.1 to 7 parts of a stabilizer; 0.1 to 5 parts of an emulsifier; 0.1-5 parts of a wetting dispersant; according to the invention, through the combination of the selected main and auxiliary antioxidants and the combination of the ultraviolet light absorber and the heat stabilizer, the defect structure of PVC is improved at the end of PVC polymerization, and meanwhile, the combination of the main and auxiliary antioxidants can quickly decompose peroxide and hydroperoxide at the later stage of processing; compared with the prior art, the whiteness and thermal stability of PVC in the early stage are good, the anti-yellowing effect and the long-term aging resistance of PVC in the later processing are more emphasized, the performance of PVC in the dynamic thermal stability is improved, and the volume impedance and the initial coloring are low.

The invention provides a method for detecting an antioxidant in a food contact plastic material or a product thereof and application of the method. The detection method comprises the following steps: mixing a sample to be detected with an organic solvent, filtering, taking filtrate, carrying out gas chromatography-mass spectrometry detection, and calculating the content of the antioxidant in the sample to be detected according to a detection result, the antioxidant comprises any one or a combination of at least two of 2, 4-bis [(dodecylthio) methyl]-6-methylphenol, 2, 6-di-tert-butyl-4-ethylphenol or 2, 2 '-methylenebis [6-(1-methylcyclohexyl)-p-cresol]. The detection method provided by the invention is simple to operate, low in detection limit and quantitation limit, high in accuracy and excellent in repeatability and reproducibility, and can effectively and accurately detect the three phenolic antioxidants at the same time.

The invention discloses a high-temperature durable epoxy resin coating and a preparation method thereof, and relates to the technical field of epoxy resin coatings. The novel epoxy resin is prepared from 1, 3, 5-tris (2-propynyloxy) benzene, 3-azido butanol and glycidyl methacrylate as raw materials, the novel epoxy resin has multiple functional groups, the crosslinking degree of the coating can be improved, the epoxy resin coating can have high thermal stability due to introduction of a benzene ring and a triazole structure, and the epoxy resin coating can be applied to the field of coating materials. The heat resistance of the coating is improved; secondly, grafting 2-benzoyl-4, 5-dichlorobenzoic acid onto calcium silicate, and then hydrolyzing to prepare a novel hindered phenol antioxidant; calcium silicate is used for loading the antioxidant, a stable loading platform can be provided for the antioxidant, and active groups on the surface and the antioxidant generate a synergistic effect, so that the oxidation resistance is further improved, the anti-aging performance of the coating is improved, and the service life of the coating is prolonged. The high-temperature durable epoxy resin coating prepared by the invention has the effects of high temperature resistance and durability.

The invention discloses a high-temperature resistant and anti-aging conductive foam, and relates to the technical field of foam materials. The raw material composition and ingredients are: high-temperature resistant ceramic particles, thermoplastic resin, metal organic gel MOGs and foam metal composite materials, antioxidant-hindered phenol antioxidant and lubricant-zinc stearate. The invention realizes the improvement of the high-temperature resistance and anti-aging performance of the conductive foam through the designed raw material ratio and innovative material combination. Specifically, polyetheretherketone is introduced as a thermoplastic resin matrix, and its good thermal stability and mechanical properties provide strong support for the entire material system. The metal organic gel and the foam metal composite material are integrated into the matrix, which not only enhances the conductive performance of the material, but also enhances the overall stability and durability of the material through its structural characteristics, so that the conductive foam can still maintain excellent performance under high temperature and high pressure, and broadens its application range.

The invention belongs to the technical field of high polymer materials, and particularly relates to a low-viscosity self-adhesion protective film and a preparation method thereof. The protective film comprises an outer contact layer, a support layer and a self-adhesive adhesion layer. The outer contact layer is made of a modified elastomer material; the supporting layer is made of a modified polyolefin material; the self-adhesive layer is a modified acrylate hot-melt pressure-sensitive adhesive and comprises an acrylate monomer, a reversible cross-linking agent, a plasticizer, an initiator, a hindered phenol antioxidant, a hindered amine light stabilizer and a reaction control aid; the acrylate monomers comprise butyl acrylate, isobornyl methacrylate and hydroxyethyl acrylate, the reversible cross-linking agent is bis (2-methallyl) ethyoxyl disulfide, the plasticizer is a polyurethane elastomer, and the hindered phenol antioxidant is an antioxidant 1010; the hindered amine light stabilizer is a light stabilizer 770, the reaction control aid is diethyl hydroxylamine, and the initiator is di-tert-butyl peroxide.

This invention discloses a method for synergistic surface modification of tungsten-copper powder to inhibit the decomposition of polyoxymethylene (POM), belonging to the field of polymer material anti-degradation modification technology. This invention addresses the problem that tungsten-copper powder easily catalyzes the severe degradation of POM during PIM tungsten-copper feedstock mixing and injection molding, leading to poor feedstock flowability, injection instability, large fluctuations in product size and weight, and low yield. First, the tungsten-copper powder is activated by low-temperature plasma etching to construct a reaction interface. Then, a silica barrier film is prepared using tetraethyl orthosilicate as the silicon source and modified with fluorosilicone, loaded with a metal soap neutralizer, grafted with a hindered phenolic antioxidant, and simultaneously introduced with epoxy active groups to construct a multi-component synergistic degradation inhibition system. This invention, through multi-step synergistic modification, precisely controls the modification process, comprehensively inhibiting POM decomposition. When the modified powder is blended with POM, a capping reaction occurs, blocking the unzipping degradation pathway of POM, improving the compatibility of the filler and the matrix, and ensuring the continuous and stable preparation and injection molding of PIM tungsten-copper feedstock.

The present invention provides a method for lubricating a combustion engine that is suitable for improving at least one of the following: deposits, sludge, oxidation, and wear. [Solution] A method for lubricating a combustion engine comprises lubricating the combustion engine with a lubricating oil composition, wherein the lubricating oil composition comprises a base oil having a lubricating viscosity having more than about 90 weight percent saturated material, less than about 0.03 weight percent sulfur, and more than about 50 weight percent hydrogenated mineral oil having a viscosity index of less than or equal to about 120; a detergent system having less than about 5 weight percent metal from a non-sulfonate detergent and (ii) a total base number (TBN) of a specific value, giving about 60 to about 85 percent of the total lubricating oil composition TBN; an anti-wear system comprising one or more zinc dihydrocarbyl dithiophosphate compounds; and an antioxidant system comprising one or more phenolic antioxidant compounds, one or more amine antioxidant compounds, or a combination thereof.

A lubricating composition comprises an oil of lubricating viscosity, a phenolic antioxidant, a sulfurized organic compound having an active sulfur content of no more than 8% by weight, and optionally one or more performance additives selected from the group consisting of succinimide dispersants and detergents. Further, a method for improving the oxidative stability of a lubricating oil in an engine comprises supplying to the engine a lubricating composition comprising an oil of lubricating viscosity, a phenolic antioxidant, a sulfurized organic compound having an active sulfur content of not more than 8% by weight, and optionally one or more performance additives selected from the group consisting of succinimide dispersants and detergents.

The invention provides a high-activity adjustable solid catalyst as well as a preparation method and application thereof. The preparation method of the adjustable solid catalyst comprises the following steps: mixing and stirring hexadecyl trimethyl ammonium bromide, ferric chloride hexahydrate and water according to a solid-to-liquid ratio of (1-3): (1-3): (30-40) to prepare a mixed solution; and dipping transition metal salt into the prepared mixed solution, and then carrying out hydrothermal crystallization reaction to prepare the high-activity adjustable solid catalyst. The product prepared by the invention is doped with transition metal, so that the coupling effect is strong; and the structure morphology of the catalyst and the distribution of transition metal elements are more uniform. Metal ions in the regular octahedral structure are located at the vertex, so that reactant adsorption is more facilitated, the selectivity of ortho-alkylation of aromatic compounds is higher, and the activity of catalyzing ortho-alkylation of the catalyst is obviously improved. The metal salt-loaded high-activity adjustable solid catalyst prepared by the invention can be applied to production of hindered phenol antioxidants from phenolic substances.

The application provides a hybrid vehicle engine lubricating oil composition and a preparation method thereof.The hybrid vehicle engine lubricating oil composition comprises the following components: (A) a benzotriazole derivative; (B) a composite antioxidant comprising an alkylated diphenylamine antioxidant and a sulfide phenolic antioxidant; (C) a polyisobutylene succinimide ashless dispersant; (D) a sulfonate and / or a sulfated alkyl phenate; (E) a zinc dialkyldithiophosphate; (F) a composite friction modifier comprising an oil-soluble organic molybdenum friction modifier and an ashless friction modifier; (G) a phosphite type extreme pressure antiwear agent; and (H) a major amount of a lubricating oil base oil; wherein the structure of the benzotriazole derivative is shown in formula (I): wherein the definitions of the groups are shown in the specification.The hybrid vehicle engine lubricating oil composition has excellent antioxidant performance, corrosion resistance and rust resistance, and good emulsion retention performance and wear resistance.

This invention discloses the application of phenolic antioxidants in phosphate ester fire-resistant oil and the phosphate ester fire-resistant oil itself. It belongs to the field of phosphate ester fire-resistant oil technology. The phenolic antioxidant used is 2,6-di-tert-butyl-p-cresol, with an addition dosage of 0.03%–0.1%. The main component of the phosphate ester fire-resistant oil is tris(2,4-methyl)phosphate. Adding this phenolic antioxidant to the phosphate ester fire-resistant oil product can improve its overall performance during operation, enhance the stability of the phosphate ester fire-resistant oil product, and provide a guarantee for the safe operation of generator sets.

To provide an oral composition containing dl-α-tocopheryl 2-L-ascorbyl phosphate diester alkali metal salt and cetylpyridinium chloride, with reduced photodegradation of the dl-α-tocopheryl 2-L-ascorbyl phosphate diester alkali metal salt.SOLUTION: An oral composition includes dl-α-tocopheryl 2-L-ascorbyl phosphate diester alkali metal salt, cetylpyridinium chloride, and at least one antioxidant selected from the group consisting of ascorbic acid, ascorbic acid derivatives, erythorbic acid, erythorbic acid derivatives, phenolic antioxidants, and salts thereof.SELECTED DRAWING: None

In a composite solid electrolyte containing an inorganic solid electrolyte and a polymer solid electrolyte containing a polyether polymer, there is room for improvement in dispersibility of the inorganic solid electrolyte and the polyether polymer. The present invention provides a polymer material for an inorganic solid electrolyte, the polymer material containing: a polyether polymer in which the main chain has a polyoxyethylene skeleton; and a phenol-based antioxidant. It has been found that this polymer material improves dispersibility with an inorganic solid electrolyte.

The application relates to the technical field of acrylic resins, in particular to a high-transparency acrylic resin composition, a preparation process thereof and application of the high-transparency acrylic resin composition to photovoltaics. The high-transparency acrylic resin composition comprises a glycidyl acrylic resin, a curing agent, a plasticizer and a leveling agent, wherein the curing agent is prepared by the following method: firstly, porous nanoparticles are prepared by adopting a sol-gel method with a template agent; secondly, the porous nanoparticles are modified by carboxylation; and finally, the carboxyl-modified porous nanoparticles are grafted with a polyphenol type hindered phenolic antioxidant. In addition, a polysiloxane with a fatty ring structure and an epoxy group is introduced into the glycidyl acrylic resin. The above acrylic resin composition is not only light in quality, has high transparency, but also has good aging resistance, and is an excellent choice as a photovoltaic module packaging material.

The invention discloses an emulsion type antioxidant as well as a preparation method and application thereof, and belongs to the fields of chemical engineering and material science. The emulsion-type antioxidant comprises: a) a hindered phenol antioxidant dispersed in water in the form of particles; b) an emulsifier dissolved and dispersed in water; c) a surfactant dissolved and dispersed in water; d) controlling the content of water and dissolved oxygen within 0.3 mg / L; and e) inevitable oxidation products, and the mass ratio of the content of the oxidation degradation products to the hindered phenol antioxidant is controlled within 5% by adopting a spectrum method. The preparation method comprises the following steps: firstly, treating water to control the content of dissolved oxygen in the water within 0.3 mg / L, and then dispersing, shearing and emulsifying the materials; the obtained emulsion type antioxidant is used for preparing PVC and PVC-containing products, and the influence on the performance of the PVC and the PVC-containing products is reduced.

The invention belongs to the technical field of high polymer materials, and provides a modified PEEK material with good processing stability and a preparation method thereof, the modified PEEK material comprises the following raw materials by weight: 90-100 parts of polyether-ether-ketone, 8-15 parts of modified carbon nanotubes, 2.5-5 parts of modified titanium dioxide, 0.5-3.0 parts of a processing aid, 0.2-0.6 part of a hindered phenol antioxidant, and 0.1-0.3 part of a phosphite antioxidant. The preparation method comprises the following steps: step 1, drying PEEK, modified carbon nanotubes and modified titanium dioxide; step 2, mixing the dried PEEK, modified carbon nanotubes, modified titanium dioxide, a processing aid, a hindered phenol antioxidant and a phosphite antioxidant in a high-speed mixer to obtain a premix; and step 3, adding the premix into a twin-screw extruder, and carrying out melt blending, extrusion and granulation to obtain the modified PEEK material.

The invention provides a conductive film and a method for manufacturing the conductive film. The resistance value can be suppressed even by a method other than an increase in the amount of conductive filler. The conductive film includes a resin, a conductive filler, and an antioxidant. The antioxidant inhibits at least oxidation of the resin. The antioxidant includes at least one of a phenolic antioxidant and a phosphite antioxidant.

An example of a kit for 3D printing includes a build material composition and a fusing agent to be applied to at least a portion of the build material composition during 3D printing. The build material composition of the kit includes a polyamide 6,13 material, a phosphorus-containing antioxidant, and a sulfur-containing antioxidant, or a polyamide 6 material, the sulfur-containing antioxidant, and a phenolic antioxidant. The fusing agent includes a radiation absorber to absorb radiation to melt or fuse the build material composition in the at least the portion.

The invention discloses a modified aramid composite material and a preparation method thereof, and relates to the technical field of aramid composite material production, and the modified aramid composite material is prepared from aramid fibers, a resin matrix, an interface enhancement layer, a weather-resistant-flame-retardant synergistic system and a functional auxiliary agent; according to the preparation method, plasma activation and microwave-assisted in-situ grafting are combined, the limitation of a traditional single interface modification technology is broken through, the interlayer bonding strength and fatigue resistance of the composite material are remarkably improved, a multi-element compounding technology of the hindered amine light stabilizer, the hindered phenol antioxidant and the nanofiller is adopted, and the composite material is prepared. According to the present invention, the integrated improvement of the weather resistance and the flame retardant property of the material is achieved through the intermolecular synergistic effect, and the space customization of the mechanical property and the functional characteristic of the composite material is achieved through the combination of the 3D printing technology and the magnetic field orientation curing, such that the impact resistance and the size stability of the composite material under the complex working condition achieve the collaborative optimization.

Specifically disclosed is a lubricating oil composition which contains a vegetable oil (A), zinc dithiophosphate (B) and an amine-based antioxidant (C), and which is characterized in that: the total content of linoleic acid and linolenic acid among fatty acids constituting the vegetable oil (A) is less than 20% by mass based on the total amount of fatty acids constituting the vegetable oil (A); the content of the amine-based antioxidant (C) is 2.00 mass% or more based on the total amount of the lubricating oil composition, and when the lubricating oil composition further contains a phosphorus-free phenolic antioxidant (D), the content of the phosphorus-free phenolic antioxidant (D) is less than 2.00 mass% based on the total amount of the lubricating oil composition.

The application discloses a methyl methacrylate copolymer and a preparation method and application thereof. The methyl methacrylate copolymer is mainly obtained by polymerization of 20-90 mass parts of methyl methacrylate monomer a), 10-80 mass parts of aromatic unsaturated hydrocarbon monomer b) and 0-20 mass parts of other vinyl monomer c). By adding phosphite antioxidant before resin devolatilization and adding hindered phenolic antioxidant in the resin extrusion granulation stage, the resin has good optical performance and aging resistance.

A rust-preventive film comprising at least recycled polyethylene, a vaporizable rust inhibitor, and an antioxidant, wherein the vaporizable rust inhibitor is selected from carboxylic acid esters and heterocyclic aromatic compounds, and the antioxidant is a phenolic antioxidant.

The invention discloses a microcellular foamed polypropylene interior material with excellent scratch resistance and a preparation process thereof, and relates to the technical field of vehicle door interior panel materials. The polypropylene composite material comprises the following components in parts by weight: 100 parts of polypropylene, 8-12 parts of a maleic anhydride grafted polypropylene-nano silicon dioxide composite modifier, 5-15 parts of a polyolefin elastomer, 3-10 parts of a supercritical carbon dioxide foaming agent, 0.5-1.5 parts of a hindered phenol antioxidant, 0.3-0.8 part of a light stabilizer and 0.2-0.6 part of a lubricating dispersant. The problems that in the prior art, a microcellular foaming polypropylene interior decoration material is poor in scratch resistance, uneven in foam structure, low in preparation process efficiency and the like are effectively solved, synergistic improvement of the scratch resistance, the mechanical property and the foaming property of the material is achieved, meanwhile, the production efficiency is improved, and the production cost is reduced.

The invention belongs to the technical field of materials, and particularly relates to a light stabilizer composition as well as a preparation method and application thereof. The light stabilizer composition is prepared from the following raw materials in percentage by weight: 10-40% of an ultraviolet absorbent I, 0-16% of an ultraviolet absorbent II, 10-30% of a hindered amine light stabilizer I, 10-30% of a hindered amine light stabilizer II, 1-10% of a phenolic antioxidant and 1-20% of a phosphite antioxidant. The preparation method comprises the following steps: uniformly mixing the raw materials in a liquid state in the light stabilizer composition, and heating to 40-60 DEG C; and then uniformly spraying the mixture onto a mixed powder raw material obtained by uniformly mixing the raw materials in the powder state in the light stabilizer composition to finally obtain the light stabilizer composition. The anti-ultraviolet additive is used as an additive of raw materials for preparing a product exposed in an ultraviolet environment for a long time, and the product obtained when the addition amount of the anti-ultraviolet additive is 0.4 wt% has good anti-ultraviolet, anti-yellowing and anti-aging properties and the like.

The invention relates to the field of lubricating oil, in particular to an anti-wear ionic liquid additive, a lubricating oil composition and preparation and application of the lubricating oil composition. The lubricating oil composition is prepared from the following components in parts by mass: 2.2 to 3.8 parts of a magnesium salt detergent, 3 to 4.2 parts of an anti-wear ionic liquid additive, 1.8 to 3 parts of an amine antioxidant, 1 to 1.5 parts of a phenol antioxidant, 4.8 to 5.8 parts of a dispersing agent, 0.8 to 1.5 parts of an anti-rust agent, 0.2 to 0.7 part of a pour point depressant, 0.02 to 0.06 part of a composite anti-foaming agent and 78.0 to 85.5 parts of base oil, wherein the anti-wear ionic liquid additive is prepared by mixing N-trioctyl hexadecyl ammonium and 1-sulfonic acid hexyl succinate. The lubricating oil composition provided by the invention can improve the knocking phenomenon existing in the hydrogen engine.

The invention belongs to the field of lubricating oil, and particularly relates to an oil additive composition for a screw air compressor with an ultra-long oil change period and application of the oil additive composition. The additive composition comprises the following raw materials in parts by weight: 50-80 parts of an antioxidant, 1-10 parts of an anti-rust agent, 1-10 parts of an anti-wear reagent at extreme pressure, 1-10 parts of a metal deactivator and 1-3 parts of an anti-foaming agent, the antioxidant is selected from an amine type antioxidant or a mixture of the amine type antioxidant and a phenol type antioxidant. The additive composition provided by the invention shows excellent oxidation resistance, provides good anti-corrosion protection for metals, and reduces the generation of oil sludge paint films. The composition is stable and excellent in performance, provides excellent protection for continuous operation (the exhaust temperature reaches up to 200 DEG C) under severe conditions and at high temperature, has an ultra-long oil change period which is up to 24,000 hours and is three times that of conventional synthetic screw air compressor oil, and can meet the lubrication requirements of vane type and rotary screw air compressor systems.