774 results about "Phenolic antioxidant" patented technology

Disclosed herein is a lubricating oil for bearings comprising (a) a diester represented by General Formula (1) wherein R1 and R2 are the same or different, and each represents a C3-C17 linear alkyl group; A represents a C2-C10 linear alkylene group or A represents a branched alkylene group consisting of a linear alkylene group, the linear alkylene group being the principal chain, and one or more alkyl groups (branches) bonded to the linear alkylene group, wherein the total number of carbon atoms of the linear alkylene group and the one or more alkyl groups is 3 to 10; with the proviso that when A is a branched alkylene group and has two or more alkyl groups, the two or more alkyl groups are not bonded to the same carbon atom; or a mixture of the diester with an additional base oil and (b) at least one member selected from the group consisting of phenol-based antioxidants and amine-based antioxidants, and optionally containing (c) at least one member selected from the group consisting of phosphorus-based compounds and aliphatic linear monocarboxylic acids, and further optionally containing (d) at least one member selected from the group consisting of benzotriazole-based compounds and gallic acid-based compounds.

A polyphenoic antioxidant-enhanced comestible composition and method for making it are disclosed. The antioxidant-enhanced comestible preferably includes an astringent amount of exogenous polyphenolic antioxidant dissolved or dispersed in a precursor edible product. The composition also includes an effective concentration of at least one astringency compensating or masking agent sufficient to offset the astringency contributed by the exogenous polyphenolic antioxidant compounds, and can also include an effective amount of at least one protective agent that protects polyphenolic antioxidants from premature oxidation.

The instant invention relates to a lubricant composition stabilized against the deleterious effects of heat and oxygen. The composition comprises a hydrotreated or hydrodewaxed oil and an effective antioxidant stabilizing amount of a mixture of a phenolic antioxidant; an N,N-disubstituted aminomethyl-1,2,4-triazole; an aromatic amine antioxidant; an alkyl phenoxy alkanoic acid; and an N-acyl sarcosine derivative. Optionally, further additives are added to the subject lubricant compositions.

The present invention provides a manufacturing method of copolyester for low acetaldehyde content of PET bottles. The polyethylene terephthalate (PET) polymer is added with an appropriate modifier in order to decrease the production of acetaldehyde caused by pyrolysis side reaction during the blow molding process of PET bottles. The modifier comprises stabilizer and primary antioxidant, wherein the stabilizer is an inorganic phosphorous compound with an addition quantity of 0.003~0.5 weight % based on the weight of the total copolyester copolymer and the primary antioxidant is a hindered phenolic antioxidant containing Ca+2 with an addition quantity of 0.005~5.0 weight % based on the weight of the total copolyester copolymer. The present invention owns an improving effect of decreasing the production of side product-acetaldehyde at least 30% than those without the addition of said modifier.

A composition for the treatment, prevention or management of a condition in primates, especially humans comprising a phenolic antioxidant-chromium complex.

The invention discloses a hot melt adhesive which comprises the following components in parts by mass: 5-10 parts of EVA (ethylene-co-vinyl acetate), 2-6 parts of tackifier, 5-10 parts of diluent, 0.5-1.5 parts of antioxidant and 0.5-1.5 parts of plasticizer. The tackifier is one of rosin resin, petroleum resin, terpene resin, phenolic resin and epoxy resin; the diluent includes one or both of wax and low-molecular polyolefin; the antioxidant is phenolic antioxidant; and the plasticizer is DCHP (Dicyclohexyl phthalate). The EVA contains 20-30% of vinyl acetate monomer; and the wax is microcrystalline wax with molecular weight of 3,000-4,000 and melting point of 65-85 DEG C.

A polymer composite comprising a thermoplastic polymer compounded with a phenolic antioxidant, an organo-disulfide antioxidant, and a silver-based antimicrobial agent. The specified combination of antioxidant stabilizers is superior in inhibiting undesirable discoloration of thermoplastic polymers in the presence of compounded silver-based antimicrobial agents. A process of preparing such a composite, comprising compounding the phenolic antioxidant and organo-disulfide antioxidant with the thermoplastic polymer prior to compounding the silver-based antimicrobial agent with the thermoplastic polymer.

The present invention provides a manufacturing method of copolyester for low acetaldehyde content of PET bottles. The polyethylene terephthalate (PET) polymer is added with an appropriate modifier in order to decrease the production of acetaldehyde caused by pyrolysis side reaction during the blow molding process of PET bottles. The modifier comprises stabilizer and primary antioxidant, wherein the stabilizer is an inorganic phosphorous compound with an addition quantity of 0.003~0.5 weight % based on the weight of the total copolyester copolymer and the primary antioxidant is a hindered phenolic antioxidant containing Ca+2 with an addition quantity of 0.005~5.0 weight % based on the weight of the total copolyester copolymer. The present invention owns an improving effect of decreasing the production of side product-acetaldehyde at least 30% than those without the addition of said modifier.

The invention discloses an anti-oxidative color masterbatch. The anti-oxidative color masterbatch comprises the following raw materials in percentage by weight: 10-70% of pigment, 1-22% of antioxidant composition, 5-30% of dispersion and lubrication agent, 20-60% of carrier resin and 0-15% of filler, wherein the antioxidant composition comprises a hindered phenolic antioxidant and one or more of a phosphite antioxidant, a thio antioxidant and a light stabilizer. The invention further discloses a preparation method and application of the anti-oxidative color masterbatch. The anti-oxidative color masterbatch disclosed by the invention has the advantages of good uniformity, good stability, good processability, good mobility and good heat and weather resistance; the preparation method of the anti-oxidative color masterbatch has the advantages of simplicity, no pollution to factory buildings and no pollution to operating personnel; and during use, the dispersion is easy, the adding dosage is small, the service lives of plastic products can be prolonged remarkably, the brightness of colors of the plastic products can be increased, and the fading time of the plastic products can be delayed.

A resveratrol-containing composition capable of providing a therapeutic benefit to a subject such as modulation of a biological activity, improving cell transplantation therapy, or improving macular degeneration or dystrophy treatments. The compositions comprise trans-resveratrol, a metal chelator, and one or more additional antioxidants such as phenolic antioxidants or vitamin D.

The invention relates to an isothermal graded quenching oil composition and uses thereof, mainly aims at further improvement of cooling performances, thermal oxidation stability and brightness of isothermal graded quenching oil in the prior art, and solves the problem that the isothermal graded quenching oil has no corrosion resistant performance on workpieces after quenching. The isothermal graded quenching oil composition comprises the following components: by weight, a) 0.3 to 8 parts of a cooling accelerant; b) 0.1 to 3 parts of an antioxidant; c) 0.001 to 1 part of a brightener; d) 0.03 to 5 parts of an anti rust agent; and e ) 78 to 98 parts of base oil; in the technical scheme, the antioxidant is selected from a phenolic antioxidant or a mixture of amine antioxidants, the technical scheme can well solve the problem, and the isothermal graded quenching oil composition can be used for quenching of wearable steel balls, saw blade, auto gearbox gears, gear rings, gear sleeves, shafts and other precision parts.

Provided is a curable silicone resin composition including (A) a siloxane-based compound containing at least 2 addition reactive carbon-carbon double bonds within each molecule, (B) a siloxane-based compound containing at least 2 hydrogen atoms bonded to silicon atoms within each molecule, (C) a hydrosilylation reaction catalyst, (D) a phenol-based antioxidant, and (E) a hindered amine compound. Also provided are an optical semiconductor sealing material including such a composition, and an optical semiconductor device that has been sealed with such a composition. The curable silicone composition generates a cured product with high hardness and strength, excellent transparency, and excellent light transmittance and photostability particularly in the short wavelength region.

The present invention relates to an engine oil lubricant composition for use in internal combustion engines comprising one or more molybdenum containing compounds that deliver 1-1000 ppm molybdenum to the finished oil, one or more phosphorus containing compounds that deliver 25-650 ppm phosphorus to the finished oil, and one or more poly(meth)acrylate viscosity index improvers (VI improvers) that may or may not be functionalized, for improved fuel economy and turbocharger related deposits. In addition, the composition comprises an antioxidant system which is carefully balanced to provide improved fuel economy, comprising an aminic antioxidant, a phenolic antioxidant and an ashless dithiocarbamate. Additionally, the formulated oil may contain a dispersant poly(meth)acrylate, in addition to the PAMA VI improver, to reduce the amount of traditional succinimide dispersants.

The present invention provides polyolefin compositions that are UV stable and suitable for articles that may be exposed to sunlight. The present invention provides, in one aspect, a polyolefin homopolymer or copolymer comprising, by weight of the polyolefin: (a) from 0.001 to 2 wt % hindered amine; (b) from 0.001 to 1 wt % ethoxylated amine; and (c) from 0.001 to 1 wt phenolic antioxidant; wherein the amount of phenolic antioxidant (PA), ethoxylated amine (EA) and hindered amine (HA) present in the composition is satisfied by the equation:PA+EAHA=Qwherein Q ranges from 0.15 to 250 when each component is expressed as a weight percentage. The composition is stable towards UV radiation such that it is useful for any number of articles such as automotive components and other articles that are, for example, injection molded.

The invention discloses an anti-crocking rubber sole and relates to a rubber sole. The invention provides the anti-crocking rubber sole with low production cost, long service life, ageing resistance and no crocking and a method for manufacturing the same. Raw materials comprise A and B; the raw material A comprises 72.9 percent of cis-1,4-polybutadiene rubber, 20.2 percent of caoutchouc, 6.9 percent of styrene-butadiene rubber, 44.5 percent of precipitated hydrated silicon dioxide, 0.8 percent of bi-(3- propyl triethoxysilane)- tetrasulfide, 5.3 percent of zinc oxide, 3.5 to 4.5 percent of polyethylene glycol, 1.0 to 2.0 percent of stearic acid, 1.1 percent of rubber viscosity increaser, 0.8 percent of activating agent, 0.3 to 0.6 percent of phenolic antioxidant, 0.4 percent of tackifying resin and 1.0 percent of antifogging agent; the raw material B comprises insoluble sulfur, tetramethylthiuram monosulfide and an accelerant; and the ratio of the A to the insoluble sulfur to the tetramethylthiuram monosulfide to the accelerant is 500 : 1.0-2.5 :1.0 : 0.7. The anti-crocking rubber sole is prepared by banburying, mill opening, sulfur treatment, measurement of a vulcanizing curve, oil pressure molding and a crocking test.

The invention relates to a hot melt adhesive for cable accessories in a nuclear island of a nuclear power plant, and the hot melt adhesive is composed of the following components in parts by weight: 100 parts of ethylene copolymer hot melt adhesive, 30-100 parts of polyolefin elastomer and 5-10 parts of composite antioxidant, wherein the ethylene copolymer hot melt adhesive comprises one or more of ethylene-vinyl acetate copolymer hot melt adhesive, ethylene-ethyl acrylate copolymer hot melt adhesive, and ethylene-methyl acrylate copolymer hot melt adhesive; the polyolefin elastomer is a molecular-chain-saturated ethylene and C3-C20 alpha-olefin copolymer; and the composite antioxidant is one or more of a hindered phenolic antioxidant, a sulfur-containing antioxidant and an ester antioxidant. The hot melt adhesive provided by the invention can be applied to the cable accessories in the nuclear island of the nuclear power plant, and can also be used in aviation, shipping, nuclear submarine and other fields with higher performance requirements on the hot melt adhesive.

The present invention includes a polyolefin composition having reduced coloration with aging. The polyolefin composition comprises at least one polyolefin, an effective amount of a primary phenolic antioxidant to promote long term thermal stability of the polymer composition, and an effective amount of a phosphite processing stabilizer to promote thermal stability of the polymer composition during melt processing. The polymer composition further comprises an effective amount of a sacrificial phosphite antioxidant to reduce the yellowness index of the polymer composition. The sacrificial phosphite antioxidant and the phosphite processing stabilizer are not the same compound.

A method of making a hindered phenolic antioxidant is disclosed wherein the method comprises: reacting an ester of the formula: wherein R1, R2, and R3 are independently selected alkyl groups and n is 0, 1, or 2, with an aliphatic polyhydroxyl alcohol of the general formula R(OH)n wherein R is an aliphatic group of from 2 to about 12 carbon atoms and n is an integer of from 2 to 7, provided that one hydroxyl is primary and the others are secondary or tertiary, in the presence of a strong acid catalyst; then, neutralizing the strong acid catalyst with an overbased detergent; and isolating the hindered phenolic antioxidant after the neutralization step.

The present invention is directed to a low sulfur and low phosphorus lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity and (b) one or more dispersants (c) one or more anti-oxidants and (d) one or more detergents, wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds. The present invention is also directed to a low sulfur and low phosphorus lubricating oil composition comprising (a) an oil of lubricating viscosity (b) a borated dispersant and a non-borated dispersant (c) a molybdenum anti-oxidant and a phenolic anti-oxidant and (d) a high overbased and a low overbased calcium sulfonate, wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds. The present invention is also directed to method for lubricating internal combustion engines, which comprises lubricating the engine with a low sulfur and low phosphorus lubricating oil compositions of the present invention.

The invention provides a compressor oil compound which comprises the following materials on the basis that the weight of base oil is 100 percent: (1) a main amount of hydrogenization mineral oil base oil; (2) 1 to 15 weight percent of ashless dispersant; (3) 0.01 to 1 weight percent of the combination of half-hindered phenolic antioxidant or amine antioxidant and half-hindered phenolic antioxidant; (4) 0.05 to 2 weight percent of antiwear additive; (5) 0.01 to 0.5 weight percent of friction modifier; (6) 0.01 to 0.2 weight percent of metal passivator; and (7) 0 to 1000ppm of antifoamer. The compressor oil has the advantages of high viscosity index, excellent lubricating property and good oxidative stability.

The invention relates to a chain lubricating oil composite agent and a preparation method thereof. The chain lubricating oil composite agent is characterized in that it comprises the following components by mass percentage: 40-60 mass% of softening oil; 10-20 mass% of an amine antioxidant; 8-20 mass% of a phenolic antioxidant; 8-20 mass% of an antiwear agent; 1-10 mass% of a friction improver; and 1-10 mass% of an ashless antirust agent. The high temperature chain lubricating oil prepared from the composite agent provided by the invention has superstrong oxidation resistance, wear resistance and corrosion resistance, so that the high temperature chain can acquire lower friction coefficient in work, safer and more reliable machine operation is ensured, the comprehensive performance is more excellent, and the antirust capability of the chain metal is further enhanced.

Compositions containing phenolic antioxidant solutions are provided. The invention further provides methods of making and using such compositions as well as compositions that contain both biodiesel and at least one antioxidant concentrate solutions and blended fuel compositions containing biodiesel blended with other fuels.

A lubricant composition is suitable for use in diesel engines and is resistant to degradation by oxidative by-products of biodiesel fuel. The composition includes (A) a base oil, (B) at least one diphenylamine antioxidant, and (C) at least one antioxidant. The antioxidant (C) is selected from the group consisting of a sulfur containing phenolic antioxidant, a phenyl-alpha-naphthylamine antioxidant, and combinations thereof. The lubricant composition is formed using a method. In the method, the (A) base oil has an initial oxidation value measured according to ASTM D 6186. In addition in the method, the lubricant composition includes up to about 6 wt % of the biodiesel fuel and has a final oxidation value measured according to ASTM D 6186 that is equal to or greater than the initial oxidation value of the (A) base oil.

The invention relates to nano-silica which is surface-grafted with hindered phenolic antioxidant molecules and a preparation method and applications thereof. The nano-silica which is surface-grafted with hindered phenolic antioxidant molecules of the invention is prepared by chemically grafting hindered phenolic antioxidant molecules onto nano-silica through a transesterification method under theaction of a catalyst and in the absence of a solvent during the preparation process, and the grafting amount of the antioxidant molecules is 2%-10% of the weight of the nano-silica surface-grafted with the antioxidant molecules. The material of the invention can be used as a filling material for preparing polymer composite materials such as polyolefin, polyester and the like so as to prepare nanocomposite materials of polyolefin or polyester and nano-silica grafted with antioxidants. The nano-silica surface-grafted with the antioxidant molecules of the invention can improve the dispersibilityof nano-silica in the polymer, improve the comprehensive mechanical properties of the polymer material, and especially improve the photooxidation aging resistance of the polymer during processing andusing.

The invention discloses an aluminum rolling oil additive composition, the present invention is characterized in that the composition comprises the following components by mass percentage: (1) oiliness agent: 30 to 48%; (2) antiwear agent containing phosphorus: 3 to 15%; (3) oleamide: 26 to 35%; (4) de-emulsifier: 0.5 to 2.8%; (5) phenolic antioxidants: 0.1 to 0.5%; (6) hydrogenated base oil: the balance. The oiliness agent is monoolein and / or oleic acid; the antiwear agent containing phosphorus is one or more selected from amine sulfuric-phosphoric diester, phosphorothioate and its amine salt, phosphate ester and its amine salt; the de-emulsifier is a combination of two types non-ionic high-molecular surfactants. According to the invention, an antiabrasive agent oleamide and the phosphatide antiwear agent are combinated with aliphatic acid and fatty acid ester, which achieves the goal of reducing the friction coefficient and improving the annealing performance; and the application amount of the additive and the cost of aluminum rolling oil can be reduced.