36results about How to "Improve antioxidant efficiency" patented technology

The invention provides a method for preparing ternary complex antiager and an emulsion and an application thereof in neoprene. The ternary complex antiager is prepared by formulation and mixing of a bisphenol mono-acrylate antiager, a hindered phenolic antiager and a sulfoether antiager according to specified proportioning. The preparation method comprises the following steps: dissolving the ternary complex antiager prepared by the above method with an organic solvent at room temperature; adding an emulsifying agent prepared by the mixture of disproportionated rosin acid soap water solution and sulfoacid anionicsurfactant water solution for fully mixing; and obtaining the ternary complex antiager emulsion after dispersing. In the process of synthesizing the neoprene rubber latex, the ratioof the dry glue of the neoprene in terms of the added ternary complex antiager emulsion is 1:0.03-0.07. The research of an aging test shows that the neoprene product prepared by adding the ternary complex antiager emulsion of the invention is superior to the neoprene product prepared by using the antiager BHT in the aspects of appearance color, Mooney viscosity, Mooney scorch time and mechanicalintensity property indexes.

The invention relates to a preparation method for a hindered bisphenol type antioxidant. The preparation method comprises the following process steps: adding 2,6-ditert-butyl phenol and a catalyst into a reaction vessel, wherein per 1 mol of 2,6-ditert-butyl phenol is added with 3 to 8 mL of the catalyst; carrying out stirring under the temperature condition of 40 to 60 DEG C until the mixture is melted; adding a formaldehyde solution, wherein a mol ratio of formaldehyde and 2,6-ditert-butyl phenol is 1: (2.0-2.2); after the completion of addition, carrying out heating to 60 to 80 DEG C, carrying out reaction for 2 to 5 hours, then carrying out pumping filtration, and carrying out washing by using warm water with a temperature of 40 to 50 DEG C; subjecting an obtained filter cake to vacuum drying, and recrystallizing an obtained crude product, wherein per 1 g of the crude product is added with 0.5 to 5 mL of a recrystallization solvent; and carrying out vacuum drying so as to obtain a yellow needle-like crystal. The method provided by the invention does not need adding alcohol organic solvents in the preparation process, has the advantages of simple production process, low cost, few by-products in a preparation process, and high antioxidant purity and yield, and is beneficial for environmental protection.

The invention discloses a preparation method of a functional nickel-catalyzed cis-polybutadiene rubber anti-aging agent, and belongs to the technical field of the preparation of the anti-aging agent. The preparation method comprises the following steps of: adding a phenolic antioxidant, a novel thioether antioxidant, a phosphite antioxidant and an ion radical trapping agent into a powder mixer, and fully and uniformly mixing the above agents to obtain the anti-aging agent disclosed by the invention, wherein the proportion in mass ratio of the phenolic antioxidant to the novel thioether antioxidant to the phosphite antioxidant and to the ion radical trapping agent is as follows: the proportion in mass ratio of the phenolic antioxidant to the thioether antioxidant is 1:(1.0-2.0), the proportion in mass ratio of the phenolic antioxidant to the phosphite antioxidant is 1.0-2.0, and the proportion in mass ratio of the phenolic antioxidant to the ion radical trapping agent is 1:(0.05-1.0). The selected ion radical trapping agent can specifically have a complex reaction with trace metal ions such as nickel and aluminum contained in a glue solution and a crude rubber product to generate stable coordination compounds so as to prevent the generation of an unstable coordination compound by the bonding of an active metal ion and hydroperoxide.

The invention discloses a polymeric hindered phenolic antioxidant and a preparation method thereof. The polymeric hindered phenolic antioxidant comprises a compound having a structure of formula (1) (shown in the specification where m is 7-80, n is 3-80 and R1 and the R2 are respectively independently selected from H, CH3, and C(CH3)). According to the method, the polymeric antioxidant containinga plurality of hindered phenol structures is obtained by nucleophilic addition of amine groups and aldehyde groups. The antioxidant disclosed by the invention has the advantages of good stability, high antioxidant efficiency, large molecular weight, migration resistance, large proportion of antioxidant groups in molecules and low additive amount; the preparation method is simple in process and mild in condition and the large-scale industrialized production is easy; and therefore, the antioxidant has broad development prospects in the fields of oil products, rubber, plastic and the like.

The invention discloses a preparation method of hindered phenol antioxidant 2-methyl-4-hydroxymethyl-6-tert-butyl phenol. The preparation method comprises the following steps of: mixing raw materials, a solvent and a catalyst so as to obtain a mixture, introducing nitrogen and blowing, subsequently heating and stirring the mixture to be reacted, adding distilled water after the reaction is accomplished, carrying out pressure reduction and distillation so as to obtain a rough product; and recrystallizing the rough product by using isopentane so as to obtain the 2-methyl-4-hydroxymethyl-6-tert-butyl phenol, wherein the raw materials are multi-polyformaldehyde and 2-methyl-6-tert-butyl phenol; the solvent is tert-butyl alcohol; and the catalyst is potassium hydroxide. By utilizing the method, novel hindered phenol antioxidant 2-methyl-4-hydroxymethyl-6-tert-butyl phenol is prepared by utilizing active groups of end groups through simple chemical modification; the antioxidant comprises a methyl and a substituent tert-butyl which is large in size, so that the phenolic hydroxyl group is prevented from oxidation consumption, the complexation in charge transfer is reduced, and the oxidation resistance efficiency of the antioxidant is improved.

The invention provides a production process of an anti-aging plastic woven bag. The production process comprises the following steps that S1, polypropylene particles, diphenylacetylene, bis(octane)amine, aromatic phosphite, a filling master batch, a light stabilizer, a nucleating agent and hydroquinone are put into a drying and stirring machine to be stirred and then to be dried; S2, the materialssubjected to the S1 step are fed into an extruder, a thin film is produced through heating by a material cylinder, shearing by a screw and a machine cylinder and forming and extruding by a die head,the thin film is cut into a blank filaments by using a blade after being cooled by water, the blank filaments are stretched to form flat filaments through a drying plate, and the flat filaments are subjected to heat setting, and then are wounded into a filament coil; S3, the coiled flat filaments are woven into a cylindrical woven bag, and winding is carried out by a winding machine; S4, a trademark and a production annotation are printed; S5, the cylindrical woven bag is cut into a woven bag by using a cutting machine; and S6, a bag opening is sewed, and the woven bag is formed. The providedproduction process of the anti-aging plastic woven bag aims to improve the anti-aging capability and the anti-oxidation capability of an existing plastic woven bag, prolong the service life of the existing woven bag, reduce the processing difficulty, and save the cost.

The invention discloses a prolamin-phenolic antioxidant nanoparticle and a Pickering emulsion with interface enriched antioxidants prepared therefrom. The preparation method is to control the phenolic antioxidant, prolamin and hydrophilic emulsifier through the anti-solvent precipitation method to prepare the gliadin-phenolic antioxidant composite nanometer with a particle size of 70-300nm, concentrated distribution and high yield. particle. The prepared composite nanoparticle can stabilize the oil-in-water emulsion with 10-50% oil phase, and the prepared Pickering emulsion has good fluidity and high physical stability. The combination of phenolic antioxidants in prolamin nanoparticles with high interface adsorption rate can effectively increase the concentration of interface antioxidants and improve the antioxidant efficiency of antioxidants. The prolamin-phenolic antioxidant composite nanoparticle is used as a stabilizer of the Pickering emulsion, and the Pickering emulsion preparation with high physical stability and excellent oxidation resistance can be prepared.

The invention discloses mesoporous molecular sieve modified asphalt and a preparation method thereof, wherein the modified asphalt comprises the following raw material components by weight: 100 partsof matrix asphalt, and 1.0-5.0 parts of a modified mesoporous molecular sieve, the modified mesoporous molecular sieve is a mesoporous molecular sieve modified with aminosilane, mercaptosilane and hindered phenol type antioxidant, and the hindered phenol type antioxidant contains a carboxyl group. According to the present invention, the asphalt is modified with the mesoporous molecular sieve, wherein the hindered phenol main antioxidant is introduced into the mesoporous molecular sieve through mercaptosilane and aminosilane surface modification and reaction, and the introduced mercapto and themain antioxidant synergistically act so as to substantially improve the aging resistance and improve the compatibility between the asphalt and the mesoporous molecular sieve, such that the service life of the road is prolonged.

The manufacture method of ternary compound antiaging agent, emulsion and application in neoprene rubber, is composed of a kind of bisphenol monoacrylate antiaging agent, a kind of hindered phenolic antiaging agent and a kind of sulfide antiaging agent according to the prescribed formulation Composite and mixed to make a ternary composite anti-aging agent; at room temperature, the ternary composite anti-aging agent prepared by the above method is dissolved in an organic solvent, and then the mixture of disproportionated abietic acid soap aqueous solution and sulfonic acid anionic surfactant aqueous solution is added The emulsifier made from the mixture is fully mixed and dispersed to make a three-component composite anti-aging agent emulsion; in the synthetic neoprene latex, it is added in a ratio of 1:0.03 to 0.07 according to the dry rubber mass of neoprene Ternary compound anti-aging agent emulsion. Aging experiment research shows: the chloroprene rubber product that has added the ternary composite anti-aging agent emulsion of the present invention to make, its rubber appearance color, Mooney viscosity, Mooney scorch time, mechanical strength performance index are all better than using anti-aging agent BHT Made of neoprene products.

The invention relates to a preparation method for a hindered bisphenol type antioxidant. The preparation method comprises the following process steps: adding 2,6-ditert-butyl phenol and a catalyst into a reaction vessel, wherein per 1 mol of 2,6-ditert-butyl phenol is added with 3 to 8 mL of the catalyst; carrying out stirring under the temperature condition of 40 to 60 DEG C until the mixture is melted; adding a formaldehyde solution, wherein a mol ratio of formaldehyde and 2,6-ditert-butyl phenol is 1: (2.0-2.2); after the completion of addition, carrying out heating to 60 to 80 DEG C, carrying out reaction for 2 to 5 hours, then carrying out pumping filtration, and carrying out washing by using warm water with a temperature of 40 to 50 DEG C; subjecting an obtained filter cake to vacuum drying, and recrystallizing an obtained crude product, wherein per 1 g of the crude product is added with 0.5 to 5 mL of a recrystallization solvent; and carrying out vacuum drying so as to obtain a yellow needle-like crystal. The method provided by the invention does not need adding alcohol organic solvents in the preparation process, has the advantages of simple production process, low cost, few by-products in a preparation process, and high antioxidant purity and yield, and is beneficial for environmental protection.

The invention discloses a mesoporous molecular sieve modified anti-rutting agent and a preparation method thereof, wherein the anti-rutting agent comprises the following raw material components by weight: 45-55 parts of high-density polyethylene, 45-55 parts of low-density polyethylene, 10-30 parts of styrene-butadiene rubber, 10-30 parts of polypropylene, and 5-8 parts of a modified mesoporous molecular sieve, wherein the modified mesoporous molecular sieve is a mesoporous molecular sieve modified with aminosilane, mercaptosilane and hindered phenol type antioxidant, and the hindered phenol type antioxidant contains a carboxyl group. According to the present invention, with the anti-rutting agent, the rutting resistance and the low temperature performance of the asphalt concrete are significantly increased, and the anti-aging performance of the asphalt concrete is improved so as to prolong the service life of the road.

The invention relates to a low-odor impact-resistant and scratch-resistant polypropylene composition in the field of plastics and a preparation method thereof. The low-odor, impact-resistant and scratch-resistant polypropylene composition may include the following components in parts by weight: polypropylene, hydrophobic fumed silica, polypropylene graft polymer, octaiso Butyl silsesquioxane; 100 parts by weight of polypropylene, 0.5-18 parts by weight of hydrophobic fumed silica, 0.5-24 parts by weight of polypropylene graft polymer, and 0.02-24 parts by weight of octaisobutyl silsesquioxane 2 parts by weight; the odor of the polypropylene resin composition of the present invention can be significantly reduced, the odor can reach below grade 3.5, the scratch resistance performance is greatly improved, the impact performance is improved and the rigidity is increased, and the problem of the prior art is well solved. In addition, the operation process is simple and reliable, the input cost is low, and it is suitable for the field of pipes.

The invention discloses a polymeric hindered phenolic antioxidant and a preparation method thereof. The polymeric hindered phenolic antioxidant comprises a compound having the structure shown in the following formula (1): in the formula, m is 7-80, n is 3-80, R 1 , R 2 independently selected from H, CH 3 , C(CH 3 ). The present invention obtains a polymeric antioxidant containing multiple hindered phenolic structures through the nucleophilic addition of amine groups and aldehyde groups. The antioxidant prepared by the present invention has good stability, high antioxidant efficiency, large molecular weight, and migration resistance. The antioxidant group accounts for a large proportion in the molecule, and the addition amount is low; the preparation process of the invention is simple, the conditions are mild, and it is easy for large-scale industrial production, and has broad development prospects in the fields of oil products, rubber, plastics, and the like.

The invention relates to a preparation method of an alkylated diphenylamine antioxidant with high color stability, belonging to the technical field of chemical engineering of production of synthetic material antioxidants. In the process of preparing and storing the alkylated diphenylamine antioxidant product, a small amount of functional antioxidant with high color stability is added to improve the color stability. The method is implemented in a way that: an atlapulgite catalyst, diphenylamine, styrene, dimerized isobutylene, nonylene and alpha-methylstyrene alkylating reagent are subjected to catalytic alkylation reaction to prepare the alkylated diphenylamine antioxidant product; and in the preparation process, a heat stabilizer and a color protection-color reduction agent method is utilized to obtain the alkylated diphenylamine antioxidant product with high color stability. The product is still light yellow after being stored in a closed white glass bottle at the indoor temperature of 10-35 DEG C for 6 months.