263 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 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.

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 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.

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.

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.

The invention discloses an ashless antioxidant composition applicable to an ultrahigh-temperature lubricating environment, lubricating oil and application of the ashless antioxidant composition. The ashless antioxidant composition is prepared from the following components in parts by mass: 2.5 to 5 parts of dialkyl diphenylamine, 2.5 to 7.5 parts of N-phenyl-alpha-naphthylamine, 0 to 2.5 parts of phenolic antioxidant and 0 to 2.5 parts of amine antioxidant. The ashless antioxidant composition does not contain metal elements, is an ashless antioxidant system, has a good antioxidant effect, can effectively control the viscosity change and acid value increase of an oil product in an ultrahigh-temperature environment of 220-300 DEG C, has an obvious inhibition effect on the generation of high-temperature sediments, and can meet the requirement of an aero-engine on the antioxidant performance of lubricating oil in the ultrahigh-temperature environment.

The invention belongs to the technical field of metal heat treatment and surface treatment, and particularly relates to long-life rapid quenching oil and a preparation method thereof.The long-life rapid quenching oil comprises, by volume, 85-95 parts of industrial white oil, 5-10 parts of a cooling accelerant, 1-2 parts of a cleaning agent and 0.5-1 part of a composite antioxidant, the composite antioxidant comprises the following components: a phenolic antioxidant and an amine antioxidant, and the volume ratio of the phenolic antioxidant to the amine antioxidant is (1.5: 1)-(3: 1). By adding the composite antioxidant, the oxidation resistance of the quenching oil can be greatly improved, the quenching hardness of a workpiece is prevented from reaching the standard, the service life of the quenching oil is prolonged, the production cost is reduced, meanwhile, the phenol antioxidant is used for providing hydrogen atoms for the amine antioxidant losing the hydrogen atoms, and the service time of the organic amine antioxidant is effectively prolonged.

The present invention discloses a method for improving the oxidation stability and anti-emulsification property of the gear oil of an electric locomotive, which relates to the technical field of gear oil. An antioxidant and an anti-emulsifier are added to the base oil. The antioxidant includes a phenolic antioxidant and an amine antioxidant, and the anti-emulsifier is a copolymer of ethylene oxide and propylene oxide. By adding specific types of antioxidant and anti-emulsifier to the base oil, the present invention improves the oxidation stability and anti-emulsification property of the gear oil, ensures the normal exertion of the lubrication and heat dissipation effects of the gear oil, reduces the wear, rust and corrosion of the gear transmission mechanism, prevents the gear oil from deteriorating, and thus prolongs the oil change period and the gear life.

The preparation method of the yellowing-resistant nylon particle composite material comprises the following steps: S1, weighing 100 parts by weight of nylon, and adding the nylon into a reaction kettle; s2, adding 2, 2, 2-trifluoroethanol as a solvent into the reaction kettle, and stirring to form a uniform nylon dissolving solution; s3, conveying the nylon dissolving solution into a spray dryer through a peristaltic pump, and performing atomization, drying and powder collection under the protection of nitrogen; s4, placing the powder in a vacuum drying oven, and drying at 25 DEG C for 3 hours to obtain nylon powder; s5, mixing the nylon powder with the following raw materials in parts by weight: 1-2 parts of an ultraviolet light absorber, 1-2 parts of a hindered phenol antioxidant, 2-4 parts of adipic acid, 0.5-1.5 parts of sebacic acid, 0.1-0.5 part of dicumyl peroxide and 8-10 parts of silane coupling agent modified mica powder; and S6, carrying out melt blending on the mixture obtained in the step S5 in a twin-screw extruder to obtain the yellowing-resistant nylon particle composite material.

The invention relates to an anti-aging agent composition and a corresponding polyol or polyurethane composition. The anti-aging agent composition comprises: i) alkylated diphenylamine, and ii) a hindered phenol antioxidant of formula IV. According to the alkylated diphenylamine, the proportion of low-molecular-weight components is reduced, the proportion of high-molecular-weight components is increased, and the alkylated diphenylamine has more excellent heat weight loss resistance, heat stability and low volatility; the long-term thermal stability of the sponge can be improved, high-temperature degradation is reduced, and high-temperature volatilization of small-molecular-weight components can be reduced, so that the FOG value of the sponge is reduced.

The invention provides a polypropylene composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The phenolic antioxidant is adopted to perform surface modification on the layered double-metal hydroxide, so that the surface property of the layered double-metal hydroxide is changed from hydrophilic to hydrophobic, the dispersity of the layered double-metal hydroxide in polypropylene is remarkably improved, and the thermal oxidation stability of the polypropylene is further improved; and meanwhile, the phenolic antioxidant is anchored on the surface of the layered double-metal hydroxide, so that the migration of the phenolic antioxidant is effectively inhibited, and the thermal oxidation stability is further improved. The result of the embodiment shows that 50% of Ti and T50% of the polypropylene composite material prepared by the invention in air are 267.1 DEG C and 342.8 DEG C respectively; in nitrogen, the temperature of Ti in the polypropylene composite material is 421.0 DEG C, and the temperature of T50% in the polypropylene composite material is 452.7 DEG C; through testing, the OIT value can reach 26.24 min, and the thermal oxidation stability is good.

This invention discloses a low-foaming rigid polyvinyl chloride (PVC) drainage pipe and its preparation method, belonging to the field of drainage pipe technology. The rigid PVC drainage pipe of this invention, through a three-layer co-extrusion structure, possesses multiple advantages including lightweight, high strength, corrosion resistance, and aging resistance. Specifically, the inner layer contains a corrosion-resistant modifier composed of chlorinated polyethylene and acrylate copolymers, which improves the strength of the drainage pipe and the corrosion resistance of the inner wall. The core layer incorporates a foaming agent and a co-foaming agent to form a microporous structure, reducing the material density and overall weight of the pipe. The introduction of modified PVC, crosslinking agents, isocyanates, and acid anhydrides during processing forms an interpenetrating network or crosslinked structure, significantly improving the strength of the core layer material. The outer layer's preparation materials include an anti-aging agent composition consisting of hindered phenolic antioxidants, ultraviolet absorbers, and nano-inorganic anti-aging agents, effectively preventing the pipe from becoming brittle, discolored, and cracked during use, achieving a significant overall aging resistance effect.

The application relates to a raw rubber composition and an anti-aging agent composition, the raw rubber composition comprising: raw rubber, and alkylated diphenylamine of the application. The alkylated diphenylamine contained in the rubber composition of the application comprises a high content of C9 disubstituted diphenylamine, a low proportion of small molecular weight components, good compatibility with rubber, is not easy to precipitate, has better long-term protection effect, even if used alone, has application effect in protecting production and processing of synthetic rubber and long-term storage, and has better effect when used in combination with a phenolic antioxidant such as an antioxidant 1520 analogue (antioxidant 1530).

The invention discloses high-flash-point graded quenching oil and a preparation method thereof, and relates to the technical field of quenching oil. The high-flash-point graded quenching oil comprises base oil and a composite antioxidant, wherein the base oil comprises trimethylolpropane oleate, and the composite antioxidant comprises a phenolic antioxidant, an amine antioxidant, a first antioxidant synergist and a second antioxidant synergist. According to the technical scheme, the high-flash-point oleate is adopted as the base oil, meanwhile, the composite antioxidant is compounded, the provided high-flash-point graded quenching oil has the extremely high flash point, the open flash point can reach 350 DEG C or above, the use temperature can reach 260-280 DEG C, the high-flash-point graded quenching oil is suitable for quenching cooling of high-hardenability workpieces and high-precision workpieces of thin-wall workpieces, and quenching deformation can be reduced. Meanwhile, the high-flash-point graded quenching oil provided by the invention has excellent oxidation resistance and can prevent oil products from being oxidized and aged too early, so that the service life of the oil products is greatly prolonged, and the use cost is effectively reduced.