43 results about "Phenolic antioxidant" patented technology

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 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.

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.

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.

This invention relates to the field of lubricant technology, specifically to a lubricant for agricultural machinery and its preparation method. This agricultural machinery lubricant, by weight, comprises the following components: 85-93 parts of a first base oil, 2.0-3.0 parts of 1,3-bis(3-phenoxyphenoxy)benzene, 0.2-0.3 parts of zinc dialkyl dithiophosphate, 0.5-1.0 parts of a graphene-based anti-wear additive, 2.0-4.0 parts of polyisobutylene succinimide, 0.5-1.5 parts of a hindered phenolic antioxidant, 1.5-3.0 parts of hydrogenated styrene-isoprene copolymer, and 0.2-0.6 parts of polymethacrylate; wherein the first base oil comprises poly(α-olefin) PAO4 and paraffin oil in a weight ratio of 2-3:1. The agricultural machinery lubricant provided by this invention improves the anti-wear and friction-reducing properties of the graphene-based anti-wear additive, and enhances the stable dispersibility of functionalized graphene in the oil phase and its interfacial properties with the oil phase.

The application relates to a hindered phenolic antioxidant and a preparation method and application thereof, which comprises the following steps: obtaining a raw material mixed solution by drying alkyl phenol and cycloalkadiene, adding a catalyst to obtain a preliminary polymerization product, further carrying out alkylation reaction with isobutene, and obtaining a final product after alkali washing, decoloring and gas stripping of the reaction product. The antioxidant prepared by the application has high activity, long heat-resistant stable time, uniform molecular weight distribution and light color, can be widely applied to ABS glue, tires, plastics and other fields, and has a good application prospect.

To provide a means to extend the lifespan of polishing pads. [Solution] The present invention provides a polishing pad for use in chemical mechanical polishing, wherein the polishing surface is made of polyurethane resin foam, and the polyurethane resin foam is made of a resin composition containing polyurethane resin and an antioxidant, the antioxidant is a phenolic antioxidant, and the phenolic antioxidant is a hindered phenolic antioxidant having a melting point of 45°C to 140°C, in which both sides of the phenolic hydroxyl group are substituted with tert-butyl groups.

This invention discloses a polypropylene composition and its applications, belonging to the field of polymer composition technology. The invention provides a polypropylene composition comprising polypropylene, a hindered phenolic antioxidant, a phosphite antioxidant, guaiacol, gallic acid, a dispersant, a light stabilizer, and a metal ion passivator. By incorporating the above components, the polypropylene polymer provided by this invention can synergistically enhance the anti-phenolic yellowing effect of the hindered phenol-phosphite composite antioxidant, resulting in a polypropylene composition that possesses both good anti-phenolic yellowing effect and good dyeing adsorption rate.

The present application relates to the technical field of ink preparation, and discloses a high-temperature-resistant and discoloration-resistant polyarylene ether nitrile modified ink and a preparation method thereof, the ink comprising a film-forming resin system, the film-forming resin system comprising polyarylene ether nitrile resin, epoxy resin and auxiliary resin; high-temperature-resistant inorganic pigment; antioxidant synergistic system; surface-modified nano inorganic barrier material; hydrolysable silane coupling type organic-inorganic hybrid precursor; curing agent; dispersant and rheological additive; wherein the antioxidant synergistic system comprises hindered phenolic antioxidant and phosphite auxiliary antioxidant; and the surface-modified nano inorganic barrier material is nano SiO2 modified by a silane coupling agent. The present application uses polyarylene ether nitrile as the main resin, optimizes the adhesion by epoxy modification, matches high-temperature-resistant inorganic pigment and anti-yellowing auxiliary agent, and controls moisture, dispersion uniformity and curing parameters throughout the process, so that the high-temperature-resistant and discoloration-resistant ink for automobile engine compartments can be successfully prepared.

The invention discloses a reactive additive with antioxidant and flame-retardant functions and a preparation method and application thereof, and relates to the technical field of antioxidant and flame-retardant additives, the reactive additive comprises a compound with a single molecular structure, and the compound comprises a phosphorus-nitrogen intumescent flame-retardant structural unit and a hindered phenol antioxidant functional structural unit which are directly connected through chemical bonds; wherein the phosphorus-nitrogen intumescent flame retardant structural unit is a phosphonitrilic chloride trimer derivative residue; according to the reactive additive with the antioxidant and flame-retardant functions as well as the preparation method and the application thereof, a phosphorus-nitrogen intumescent flame-retardant core (phosphonitrilic chloride trimer derivative residue) and a hindered phenol antioxidant unit (3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate residue) are covalently linked through a chemical bond; the reactive additive with a single molecular structure is constructed, so that the inherent defects of poor compatibility and easy migration and precipitation of an antioxidant and a flame retardant in a traditional physical compound system are solved from the molecular structure, and intramolecular synergy and long-acting stability of functional groups are realized.

A multilayer container comprising: a polyester layer containing polyester resin (X), and a polyamide layer containing polyamide resin (Y), a phenolic antioxidant (A), and a phosphorus antioxidant (B), wherein the phosphorus antioxidant (B) is a compound having a pentaerythritol backbone and an aromatic ring, and the total content of the phenolic antioxidant (A) and the phosphorus antioxidant (B) in the polyamide layer is 0.040~0.250% by mass.

This invention relates to the field of industrial lubricant additives, specifically to a novel multifunctional industrial oil compound, comprising, by weight, a sulfurized olefin extreme pressure anti-wear agent, a phenolic antioxidant, an amine antioxidant, a phosphate ester anti-wear agent, a boronized phosphorus-containing polyisobutylene succinimide dispersant, a thiocarbamate, dodecenyl succinic acid, and a metal deactivator; the weight ratio of the sulfurized olefin extreme pressure anti-wear agent to the phosphate ester anti-wear agent is 1.2:1 to 5:1; the number average molecular weight of the boronized phosphorus-containing polyisobutylene succinimide dispersant is 1000 to 3000. The novel multifunctional industrial oil compound provided by this invention, through scientific formulation design and optimized preparation process, effectively solves the technical defects of existing industrial oil compound agents and possesses multiple significant beneficial effects.

The present invention relates to a polyethylene composition comprising a polyethylene, preferably ≥95.0 wt % of polyethylene, and further (a) ≥100 and ≤500 ppm of a phenolic antioxidant; (b) ≥500 and ≤2500 ppm of an organic phosphite stabiliser; and (c) ≥500 and ≤2500 ppm of a metal stearate with regard to the total weight of the polyethylene composition. Such polyethylene composition, when used in a moulding process with PCR polyethylene, results in a reduction of the quantity of degradation products formed, which may be observed as a reduction of die deposits.

This invention discloses an aliphatic TPU base film with high resistance to humid heat aging for invisible car wraps and its preparation method, belonging to the field of polymer functional film technology. The base film of this invention is synthesized from aliphatic diisocyanate and a compound polyol via a multi-stage prepolymerization method, wherein the compound polyol is composed of aliphatic polycarbonate diol and polytetrahydrofuran ether diol. The raw materials also contain a triple compound stabilizer system consisting of a carbodiimide anti-hydrolysis agent, a hindered phenolic antioxidant, and a benzotriazole UV absorber. The preparation process includes multi-stage feeding, precision filtration, and biaxial stretching heat setting. Through soft segment molecular structure design, synergistic protection of compound stabilizers, and precise process control, this invention enables the base film to maintain an elongation at break ≥85%, a tensile strength retention ≥80%, and a yellowing index ΔYI ≤1.03 after aging at 85℃ / 85%RH for 2000h, exhibiting both high resistance to humid heat aging and excellent optical and mechanical properties.

This invention relates to a method for improving the intestinal tolerance of wheat bran dietary fiber based on synergistic modification by microorganisms and enzymes. The method includes ultra-fine grinding and high-pressure moist heat activation of wheat bran; multi-enzyme synergistic microbial stepwise treatment, first using high-temperature amylase and neutral protease to remove interfering components such as starch and protein, then using laccase to degrade lignin, resulting in a looser structure; subsequently, phytase efficiently degrades phytic acid, Aspergillus nidulan degrades the side chains of arabinogalactan, and snail enzyme and ferulic acid esterase work synergistically to convert insoluble arabinoxylan into soluble dietary fiber and release phenolic antioxidants. This method increases the soluble dietary fiber content of wheat bran by 2 times, reduces phytic acid to 10 mg / g, increases free phenolic acid content by 40%, achieves a DPPH free radical scavenging rate of 60%, significantly enhances antioxidant activity, and significantly reduces IgG levels in mouse models compared to those consuming unmodified wheat bran, thus improving intestinal tolerance and probiotic function; the product can be used as a high-quality functional food ingredient.

Disclosed herein is a thermoplastic molding composition, including:a) 30 to 99.85 wt % of at least one thermoplastic polyamide as component A;b) 0.1 to 10 wt % of at least one polyhydric alcohol having more than 6 hydroxyl groups, and having a number average molecular weight Mn of more than 2000 g / mol as component B;c) 0.05 to 3 wt % of at least one sterically hindered phenol antioxidant as component C;d) 0 to 3 wt % of at least one polycarboxylic compound having more than 3 carboxylic acid groups and / or carboxylate groups, and having a number average molecular weight Mn of more than 300 g / mol as component D;e) 0 to 50 wt % of at least one fibrous and / or particulate filler as component E; andf) 0 to 25 wt % of further additives as component F;where the total of wt % of components A to F is 100 wt %.

Suitable thermoplastic compositions for use in rotational molding applications include a) a polyethylene composition having a melt index I2 of 0.5 to 10 g / 10 min and a melt flow rate of 0.930 to 0.965 g / cm³. 3 The density of; and b) the additive package. The additive package contains i) a first hindered phenolic antioxidant compound selected from d,l-α-tocopherol, d,l-β-tocopherol, d,l-γ-tocopherol, d,l-δ-tocopherol, propyl gallate (3,4,5-trihydroxybenzoate), and mixtures thereof; and ii) a first phosphite antioxidant compound having formula I: (I) wherein R 1 R 2 R 4 and R 5 Independently selected from hydrogen atoms and C1-C 12 Alkyl; R 3 Selected from hydrogen atoms and C1-C8 alkyl groups; L represents a single bond or has the formula -CHR 6 - alkylene groups, wherein R 6 It is a hydrogen atom or C1-C 12 Alkyl group; A is an alkyl group having the formula -CHR 7 - Alkylene, having the formula -C*(=O)CHR 7 - carbonyl group, where C * Bonded to O in formula I, or having a carbonyl group of formula -(C=O)-, wherein R 7 It is a hydrogen atom or C1-C 12 Alkyl; wherein one of Y and Z is selected from hydroxyl, alkoxy, aryloxy, alkylaryloxy, and arylalkoxy, and the other of Y and Z is selected from hydrogen and C1-C. 12 alkyl.

This invention relates to the field of polymer materials technology, specifically to a weather-resistant rubber material for sealing strips and its preparation method: It is made from the following raw materials in parts by weight: 60-80 parts rubber matrix, 5-10 parts silica, 20-40 parts composite weather-resistant filler, 1-3 parts dioxane, 0.5-1.5 parts triallyl isocyanurate, 5-10 parts paraffin oil, 1-2 parts phenolic antioxidant, and 0.5-1.5 parts lubricant. In this invention, the modified filler uses cerium-doped zirconium phosphate as the core component. The variable valence of cerium ions continuously captures and passivates the active free radicals generated during the thermo-oxidative aging of rubber. Simultaneously, the layered structure of zirconium phosphate forms a physical barrier against oxygen and ozone. The modified filler inhibits the oxidation chain reaction at its source, while the chemically bonded interface prevents filler detachment during aging, thus preventing protective failure and maintaining material stability in long-term thermo-oxidative and ozone environments.

This invention discloses a petroleum fuel corrosion-resistant asphalt concrete and its preparation method, belonging to the technical field of road engineering materials. The asphalt concrete is composed of the following components in parts by weight: 0-5mm fine aggregate, 5-10mm coarse aggregate, 10-15mm coarse aggregate, mineral powder, SBS modified asphalt, petroleum fuel corrosion-resistant modifier, graphene oxide, silica, and fiber stabilizer. The petroleum fuel corrosion-resistant modifier is a compound of high-density polyethylene, hard asphalt, ethylene-vinyl acetate copolymer resin, coupling agent, naphthenic rubber oil, and hindered phenolic antioxidant. This invention, through the nano-composite modification of graphene oxide, silica, and SBS, and the synergistic effect of the dedicated petroleum fuel corrosion-resistant modifier, combined with an optimized powder-to-binder ratio and asphalt film thickness, enables the asphalt concrete to maintain excellent stability and low mass loss under petroleum fuel corrosion environments, making it suitable for various road paving projects susceptible to fuel pollution.

The application relates to the technical field of capacitor films, in particular to a high-temperature-resistant polypropylene film for capacitors and a preparation method thereof, which is prepared from the following raw materials in parts by weight: 100 parts of homopolymer polypropylene, 0.5 parts of a hindered phenolic antioxidant, 0.5 parts of a benzotriazole ultraviolet absorber, 5 parts of polyimide micro powder, 1 part of talcum powder, 0.1 part of a silane coupling agent and 2 parts of ethylene-vinyl acetate copolymer; and the solvent used in the preparation is a mixed solution of ethanol and deionized water, and the volume ratio of the ethanol to the deionized water is 1:1. The high-temperature-resistant polypropylene film for capacitors and the preparation method thereof effectively solve the technical problems that the traditional polypropylene film has poor high-temperature resistance and the performances are difficult to be improved simultaneously, and have multiple remarkable beneficial effects.

The application relates to the technical field of medical packaging materials, and particularly discloses a high-temperature and high-pressure resistant modified polypropylene resin, a preparation method thereof and a vaccine bottle processed by using the same. The high-temperature and high-pressure resistant modified polypropylene resin is mainly made of the following raw materials: polypropylene resin, hydrogenated styrene-butadiene-styrene block copolymer, modified nano montmorillonite, organic phosphate nucleating agent, calcium stearate, hindered phenolic antioxidant and phosphite antioxidant. The modified nano montmorillonite is obtained by treating nano montmorillonite with 3-(methacryloyloxy)propyl trimethoxysilane, maleic anhydride, glycidyl methacrylate and dodecafluoroheptyl methacrylate. The modified polypropylene resin has the characteristics of high tensile strength, high impact strength, high heat resistance and high barrier property, can meet the high-temperature sterilization requirement of 121 DEG C for 30 min, and the vaccine bottle does not soften, deform or collapse during high-temperature sterilization, and the sealing integrity is maintained.

The present application belongs to the technical field of environmental analysis chemistry, and discloses a high-throughput identification method for synthetic phenolic antioxidant pollutants. The method realizes the synchronous screening and identification of known pollutants and unknown substances similar in structure by performing mass spectrometric analysis on the sample to be measured, and organically combining the two paths of target database matching and non-target molecular network analysis; after spectrum verification, the environmental risk assessment can be further completed. The method effectively overcomes the defect that the traditional targeted screening is easy to miss new pollutants. Through non-target molecular network analysis, potential new pollutants can be efficiently explored from complex mass spectrometric data, significantly expanding the identification range. Therefore, the present application ensures accurate quantification of known pollutants while improving the discovery ability of unknown risk substances, thereby realizing more comprehensive and accurate identification and risk assessment of environmental pollutants.

The present application relates to the technical field of LED packaging material, and particularly relates to a white resin composition for LED packaging, a preparation method and application thereof. According to weight parts, the raw materials for preparing the resin composition include: 100 parts of epoxy resin, 0.1-5 parts of first antioxidant, 0.1-5 parts of second antioxidant, 120-170 parts of curing agent, 0.1-5 parts of catalyst, 600-1300 parts of inorganic filler, 150-600 parts of white pigment, 1-10 parts of release agent, and 0.1-2 parts of whitening agent; the first antioxidant includes hindered phenolic antioxidant; the second antioxidant includes phosphorus-hydrogen bond-containing phosphinate antioxidant; and the release agent includes polyether-modified dimethylsiloxane. The obtained composition has high reflectivity, heat discoloration resistance and good de-runner workability, and can meet the packaging requirements of LED support.

This invention discloses a high-transparency, crack-resistant microcrystalline glass and its preparation method, belonging to the field of microcrystalline glass technology. The microcrystalline glass comprises a microcrystalline glass substrate and a crack-resistant coating. The crack-resistant coating is composed of polyurethane prepolymer, nano-silica, modified organosilicon monomer, small molecule polyol, dibutyltin dilaurate, and a silane coupling agent in specific mass proportions. This invention first synthesizes a modified organosilicon monomer containing a rigid benzoxazole structure and hindered phenolic antioxidant groups through a multi-step reaction, and then prepares the polyurethane prepolymer; next, the components are mixed to form a coating liquid; finally, the microcrystalline glass substrate is surface-activated, coated, and cured. Through the synergistic effect of the components, this invention enables the microcrystalline glass to maintain high transparency while also possessing excellent crack resistance, wear resistance, weather resistance, and hydrophobicity, effectively solving the technical problems of easy cracking, yellowing, and contamination in existing microcrystalline glass.

This application relates to the field of polypropylene masterbatch processing technology, and more specifically, to a medical-grade polypropylene masterbatch resistant to gamma-ray radiation color change and its preparation method. It is prepared from the following raw materials in parts by weight: 40-80 parts polypropylene carrier resin, 5-10 parts radiation-resistant composite stabilizer, 3-5 parts dispersant, 1-2 parts processing aid, and 0-5 parts pigment. The radiation-resistant composite stabilizer is composed of a non-phenolic antioxidant, an N-alkoxy hindered amine light stabilizer, and a crystallization regulator. The non-phenolic antioxidant is a benzofuranone compound and / or a hydroxylamine compound. The crystallization regulator is at least one of a sorbitol nucleating agent, liquid paraffin, and low molecular weight polyolefin wax. This formulation can improve the color stability and mechanical property retention of medical polypropylene products, prevent embrittlement during storage, and meet the stringent requirements of medical devices for high transparency, high toughness, and long-term storage stability.

This invention discloses an additive for tin plating solution and its preparation method. The additive, based on the total volume of the tin plating solution, comprises the following components at the following concentrations: tin methanesulfonate: 100-400 mL / L; methanesulfonic acid: 30-180 mL / L; brightener A: 5-50 mg / L; auxiliary brightener B: 0.5-8 mL / L; auxiliary brightener C: 0.5-100 mg / L; stabilizer D: 2-35 g / L; dispersant E: 0.5-8 g / L; wetting agent F: 1-15 mL / L; balance: deionized water corresponding to 1 L of volume. The volume of methanesulfonic acid added is 0.8 to 1.2 times the volume of tin methanesulfonate added. The tin plating solution additive provided by this invention has a methanesulfonic acid addition volume that is 0.8 to 1.2 times the volume of tin methanesulfonate addition. This allows for precise control of the plating solution's acidity balance, maintaining the free acid concentration within the optimal range. Furthermore, it completely eliminates high-environmental-risk and high-biotoxicity components such as formaldehyde and halogenated phenols, and selects low-toxicity, easily degradable nitrogen-containing heterocyclic compounds, alkynols, high-molecular-weight amines, and environmentally friendly phenolic antioxidants. It poses no ecological pollution risks and fully meets the requirements of green electroplating production.

Provided is a polypropylene-based resin composition excellent in recyclability and visual freshness. 【Solution means】 (A) A polypropylene-based resin selected from the group consisting of homopolypropylene, propylene-ethylene random copolymer, and combinations thereof, (B) A non-phenolic antioxidant, (C) A transparent nucleating agent, (D) A fluorescent whitening agent of 2.3 to less than 3.7 weight ppm, (E) 0 to 0.03 weight% of a phenolic antioxidant are included, where the (E) phenolic antioxidant contains a hydroxyphenyl group and does not satisfy the following (1) and (2): (1) The number of hydroxyphenyl groups in one molecule / molecular weight ≤ 0.0030 (mol / g), (2) When there are multiple hydroxyphenyl groups, the hydroxyphenyl groups are bonded to each other by a group derived from a cyclic compound, A polypropylene-based resin composition.

The application discloses a detection method of phenolic antioxidant additives in insulating oil, and belongs to the technical field of insulating oil detection. The application adopts a nuclear magnetic resonance hydrogen spectrum internal standard method for quantitative detection, directly determines the mixed oil sample, an internal standard substance and a deuterated reagent, and calculates the additive content according to the integral area ratio of characteristic quantitative peaks. The chemical shifts of the characteristic quantitative peaks of the internal standard substance and the characteristic quantitative peaks of the phenolic antioxidant additives in the insulating oil are located in the medium field intensity area of the spectrum, and the chemical shifts are not overlapped. The application overcomes technical difficulties such as complicated pretreatment, interference of complex oil matrix, use of toxic reagents and strong dependence on standard products of traditional methods. The detection method has the advantages of small sample consumption, fast analysis speed, green environmental protection, simple operation and the like, and the detection limit can reach 0.004%, and can realize rapid, accurate and reliable quantitative analysis of the phenolic antioxidant additives in the insulating oil.

This invention discloses an anti-aging polyolefin masterbatch and its preparation method, comprising the following raw materials in parts by weight: 50-68 parts of acrylic resin, 10-20 parts of α-olefin ethylene copolymer, 4-9 parts of antioxidant, 3-8 parts of ultraviolet absorber, 2-6 parts of light stabilizer, 6-10 parts of modified montmorillonite powder, 8-12 parts of modified sericite powder, 4-8 parts of modified wollastonite powder, 3-8 parts of dispersant, and 2-5 parts of compatibilizer; the antioxidant includes at least hindered phenolic antioxidants. This anti-aging polyolefin masterbatch can improve the antioxidant properties, photothermal stability, and long-term storage stability of polyolefin masterbatches and plastic products, effectively inhibit yellowing, exhibit long-term stable anti-aging effects, and maintain the durability of the mechanical properties of polyolefin masterbatches and their plastic products.

The present invention relates to a polymer composition comprising: (A) at least one semi-crystalline polymer, and (B) a stabilizer composition comprising: (1) at least one primary antioxidant comprising at least one phenolic antioxidant; and (2) at least one secondary antioxidant comprising at least one phosphite, and (3) at least one chain extender; wherein the polymer composition has a b* value of less than 10 after heating at 200°C for at least 3 hours, or after heating at 175°C for at least 24 hours, according to the L*, a* and b* color system of CIE (International Commission on Illumination).