404 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.

A lubricating composition includes an oil of lubricating viscosity, a phenolic antioxidant, a succinimide dispersant which is at least substantially free of boron, a detergent comprising an alkaline earth metal salicylate and a sulfurized organic compound.

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.

Polymer compositions containing an ethylene polymer, 50-1500 ppm by weight of a glycerol stearate, and 250-7500 ppm by weight of an antioxidant selected from a phenolic antioxidant, a phosphite antioxidant, a thioester antioxidant, or any combination thereof, are described. These polymer compositions have improved initial color, improved color after long-term aging, or improved color after multi-pass extrusion processing.

The present invention can provide a method of storing or retaining a "masked phenolic antioxidant" in a solution state in the inside of, for instance, a metal container for a long period of time (predetermined period of time) without causing precipitation. Disclosed is a method of storing an antioxidant mixture, comprising storing an antioxidant mixture containing an antioxidant and an aluminum compound represented by the following formula (3): AlR3 (3) wherein R moieties each independently represent a halogen atom or an alkyl group having 3 or more carbon atoms.

To provide the hydraulic pressure actuating oil composition that has excellent wear resistance and sludge generation suppressing effect even when used under a high pressure condition, and has also excellent brake performance and clutch performance.SOLUTION: The hydraulic oil composition comprises a base oil (A), an antioxidant (B) containing an amine antioxidant (B1) and a phenolic antioxidant (B2), and a succinimide compound (C), wherein the hydraulic oil composition satisfies a following requirement (I) and is used for hydraulic equipment having an operating pressure of 30 MPa or more, and the hydraulic equipment has at least one of a wet brake and a wet clutch, and is selected from construction machines, general industrial machines, and generators. The requirement (I) is a coefficient of static friction (μs) after 1000 cycles of 0.100 to 0.162 which is measured according to a test of No. 2 of SAE described in JCMAS P.047: 2004.SELECTED DRAWING: None

This gasket member is configured from a laminate comprising at least a substrate layer and an adhesive layer disposed on both surface sides of the substrate layer, wherein the adhesive layer contains a phenolic antioxidant that does not contain an ester group, or contains a phosphorus-based antioxidant and a phenolic antioxidant.

The invention discloses a methyl methacrylate copolymer as well as a preparation method and application thereof. The methyl methacrylate copolymer is mainly obtained by polymerizing 20-90 parts by mass of a methyl methacrylate monomer a), 10-80 parts by mass of an aromatic unsaturated hydrocarbon monomer b) and 0-20 parts by mass of other vinyl monomers c). A phosphite antioxidant is added before resin devolatilization, and a hindered phenol antioxidant is added in a resin extrusion granulation stage, so that the resin has relatively good optical performance and aging resistance.

The present invention belongs to the technical field of analytical chemistry, and specifically relates to a method for detecting hindered phenol antioxidants in PVC heat stabilizers. The method comprises the following steps: S1, uniformly mixing a PVC heat stabilizer sample with a non-cyclic fatty ether to form a solution with a mass percentage of not less than 5% of the PVC heat stabilizer sample; S2, heating the solution obtained in S1 at 100-150°C for a period of time. If the solution contains hindered phenol antioxidants, the color of the solution turns yellow. Compared with the prior art, the present invention can determine the content of hindered phenol antioxidants in the stabilizer through simple processing. In the process, the amount of organic solvent used is small, resources are saved, the operation method is convenient and fast, and batch processing is easy to achieve; the sample pretreatment process is simple, and only the reactants need to be simply mixed and heated, which takes a short time and is highly efficient. After adding the solvent, the target object in the stabilizer can be quickly colored without excessive manpower and material resources.

A polyester polymer composition is disclosed containing reinforcing fibers and having improved adhesion to elastomeric materials while also being formulated for medical applications and / or food service applications. The polyester polymer composition can contain a blend of different polyester polymers and can be free of hindered phenolic antioxidants. The polyester polymer composition can be used in overmolding applications in which the composition is initially molded into a polymer component and then overmolded with an elastomeric material. The elastomeric material can contain a copolyester elastomer and can serve as a sealing member.

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 invention relates to a method for stabilizing transition metal-containing plastics against oxidative degradation, thermal degradation and / or photochemical degradation, in which method at least one sugar alcohol is introduced into the transition metal-containing plastics in combination with at least one phenolic antioxidant. The method is carried out in such a way that the resulting additive-incorporated plastic composition has a total transition metal content of at least 10 ppm (weight / weight). The invention also relates to a stabilized plastic composition produced in this way, to moulding compounds or moulded parts which can be produced from said composition, and to the use of at least one sugar alcohol in combination with at least one stabilizer made of phenolic antioxidants for stabilizing plastics containing transition metals.

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 relates to a method for determining phenolic antioxidants in a heated cigarette filter, and belongs to the technical field of tobacco analysis. According to the method for determining the phenolic antioxidant in the heated cigarette filter, the heated cigarette filter to be detected is subjected to oscillation extraction by adopting the organic solution containing the internal standard substance to obtain the liquid to be detected, the method has the advantage of simple treatment process, then the liquid to be detected is subjected to gas chromatography-mass spectrometry analysis and detection, and the detection accuracy is high. The phenolic antioxidant can be well separated, and the detection sensitivity and the detection result accuracy are improved. An internal standard method is adopted for quantification, and the influence of operation conditions on analysis results is eliminated. When the filter tip containing the phenolic antioxidant is measured by adopting the method disclosed by the invention, the detection limits of 2, 6-di-tert-butyl p-methylphenol, 2, 4-di-tert-butyl phenol and 2, 2-methylene bis (4-methyl-6-tert-butyl phenol) are 0.05 mu g / mL, 0.07 mu g / mL and 0.11 mu g / mL respectively.

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 invention discloses a heavy-duty anticorrosive and highly weather-resistant material and a coating process for photovoltaic accessories. The material comprises the following components: a high acrylonitrile SAN content of 30-50%, a maleic anhydride styrene copolymer or a maleic anhydride grafted SAN content of 1-20%, an ASA rubber powder content of 20-40%, a pentaerythritol ester lubricant content of 1-4%, a hindered phenol antioxidant content of 1-4%, a phosphite antioxidant content of 1-4%, a benzotriazole ultraviolet light absorber content of 1-4%, and a hindered amine light stabilizer content of 1-4%. , high weather-resistant pigment content of 1‑4%, flexible acrylate or flexible polyurethane, the high acrylonitrile SAN, maleic anhydride styrene copolymer or maleic anhydride grafted SAN, ASA rubber powder, pentaerythritol ester lubricant, hindered phenol antioxidant, phosphite antioxidant, benzotriazole ultraviolet light absorber, hindered amine light stabilizer and high weather-resistant pigment are mixed, extruded and granulated to obtain modified ASA material. Through the use of process and materials, the durability and corrosion resistance are good, and the skeleton remains stable in high cold and high heat environments.

To provide a lubricant composition which has excellent heat stability at high temperature and can be suitably used for lubrication of a traction drive.SOLUTION: A lubricant composition used in lubrication of a traction drive includes a base oil (A) including a synthetic oil (A1) having a bicyclo[2.2.1]heptane dimer structure, a phenolic antioxidant (B), and an aromatic amine-based antioxidant (C) and satisfies the following requirement (I). The requirement (I): a kinematic viscosity ratio at 40°C, calculated by the following formula (i), before and after a CEC oxidation test in accordance to CEC L-48-A-00, under a measurement condition of 130°C and 96 hours, is under 1.20. The formula: [kinematic viscosity ratio at 40°C]=[kinematic viscosity of the lubricant composition after the CEC oxidation test at 40°C ((mm2 / s)] / [kinematic viscosity of the lubricant composition before the CEC oxidation test at 40°C (mm2 / s)].SELECTED DRAWING: None

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.