Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

84results about How to "Strong Antioxidant" patented technology

Camellia extraction liquid, and preparation method and application thereof

The invention provides a preparation method of camellia extraction liquid. The method comprises the following steps of 1) removing impurities of fresh camellia and/or fresh camellia buds; cutting up the fresh camellia and/or fresh camellia buds into small sections for use as raw materials; 2) taking a certain number of raw materials; putting the raw materials into an ultrasonic kettle; adding a solvent with the mass ratio being 1:(3-30); uniformly stirring the mixture; adding a certain amount of inorganic acid and/or organic acid; regulating the pH value to 1.3 to 3.0; soaking the materials for 10 to 30 min; 3) then performing ultrasonic treatment for 30 to 60min; controlling the ultrasonic frequency to be 20 to 25KHz, the ultrasonic power to be 1.0 to 2.0KW and the ultrasonic temperature to be 15 to 50 DEG C; then performing filtration, sterilization and detection to obtain camellia extraction liquid. The camellia extraction liquid maintains the color, luster, flavor and effective active ingredients of the camellia to the maximum degree; the anti-oxidation functional ingredients are overall; the contents are high; the safety and the stability are high; cosmetics prepared by using camellia extraction liquid as active ingredients have the excellent whitening, spot-reducing and anti-aging efficacies.
Owner:SHANGHAI DELTA IND

High-temperature-resistant radar and infrared compatible stealth material based on frequency selective surface and preparation method of high-temperature-resistant radar and infrared compatible stealth material

The invention discloses a high-temperature-resistant radar and infrared compatible stealth material based on a frequency selective surface. The high-temperature-resistant radar and infrared compatible stealth material comprises a dielectric layer I, a resistance layer, a dielectric layer II and the frequency selective surface from inside to outside sequentially, wherein the dielectric layer I and the dielectric layer II are made of oxide fiber reinforced oxide based composite materials; the resistance layer mainly comprises a high-temperature-resistant resistance coating; the frequency selective surface mainly comprises an anti-oxidative metal coating with periodical patterns, high temperature resistance and low infrared emittance. The preparation method comprises steps as follows: the dielectric layer I is prepared firstly, and the resistance layer is prepared on the dielectric layer I with a silk-screen printing technology; then the dielectric layer II is prepared on the resistance layer; finally, the frequency selective surface is prepared on the dielectric layer II with a physical deposition technology and a laser etching technology, and the stealth material is prepared. The radar and infrared compatible stealth material can be resistant to high temperature of 1,000 DEG C or higher, and has better high temperature resistance and excellent oxidation resistance.
Owner:NAT UNIV OF DEFENSE TECH

Emulsion antioxygen and preparation method thereof

InactiveCN102304236AImprove antioxidant propertiesGood dispersionTotal solid contentPolymer science
The invention belongs to the field of antioxygen, in particular to an emulsion antioxygen and a preparation method thereof. The emulsion antioxygen is emulsified and compounded by the following raw material reagents at the proportion: main antioxygen, auxiliary antioxygen, emulsifying agent, dispersing agent and defoaming agent. The emulsion antioxygen has better oxidation resistance than other similar antioxygens and can achieve the optimal oxidation resistance effect, and the total solid content of the emulsion antioxygen is more than 52%. The emulsion antioxygen has the advantages of good oxidation resistance effect, big activity, low volatility, high durability, no pollution and the like and is especially suitable for protecting tint and pollution-free color polymer thereof. The emulsion antioxygen can be favorably dispersed in ABS (Acrylonitrile Butadiene StyreneAcrylonitrile Butadiene Styre) rubber latex, is ideal antioxygen used preparing ABS by emulsion polymerization and has excellent dispersibility. According to the emulsion antioxygen, the heating oxygen aging time of the ABS resin can be prolonged in the ABS production, the oxidation inducing temperature of the ABS resin is improved, the phenomenon that the ABS resin becomes yellows in the production and processing process thereof can be prevented, the strength of a product can be improved, and the oxidation resistance problem for preparing ABS by emulsion polymerization can be solved.
Owner:唐东波

A composition used for food-grade gear oil, a preparing method thereof, gear oil including the composition and a preparing method of the gear oil including the composition

The invention relates to the field of lubricating oil, and particularly discloses a composition used for food-grade gear oil, a preparing method thereof, gear oil including the composition and a preparing method of the gear oil including the composition. The composition includes, by weight, 5-10 parts of a food-grade antioxidant, 10-25 parts of a food-grade antiwear agent, 0.5-1.5 parts of a food-grade metal deactivator, 1.0-2.5 parts of a food-grade antirust agent, 0.5-1.5 parts of a food-grade corrosion inhibitor, 0.2-1.0 part of a food-grade oiliness agent, 0.1-0.5 part of a food-grade anti-emulsification agent and 0.01-0.3 part of a food-grade defoamer, with the balance being food-grade base oil A and the total weight parts being 100 parts. The composition and the gear oil including the composition have excellent waterproofness, oxidation resistance, wear resistance, extreme pressure properties, micro pitting resistance, rust resistance, emulsification resistance and foam resistance, can effectively meet requirements on heavy duty, extreme pressure properties, wear resistance, emulsification resistance, rust resistance, micro pitting resistance, and the like of gear systems in a food processing process, are nontoxic and harmless and do not contaminate foods.
Owner:TEXAS PETROCHEM YANTAI

Preparation method for neodymium-iron-boron magnet powder

The invention provides neodymium-iron-boron magnet powder. A neodymium-rich phase in the powder granules generates neodymium hydride in a hydrogen absorption smashing stage; then in the subsequent air flow powder grinding stage, the powder granules obtain quite high resistance to oxidation, and a neodymium-iron-boron magnet with low rare earth content, low cost and high performance can be prepared more easily; the neodymium-iron-boron granules comprising the hydride are high in brittleness, and the air flow powder grinding efficiency is improved by 50% or even 100% compared with that of the conventional process; the prepared powder granule dimensions can be reduced to be smaller than 3[mu]m, which is a quite significant condition for preparing a sintered neodymium-iron-boron magnet with high coercivity and high thermal stability; the powder granules are subjected to dehydrogenation, so that the orientation degree of the powder granules in an orientation pressing process is improved, residual magnetism of the magnet is improved, generation of internal cracks of the magnet can be effectively suppressed, and the mechanical performance of the sintered neodymium-iron-boron magnet is improved; and by effectively combining the dehydrogenation process with a fine powder mixing process, the process is simplified, the powder production efficiency is improved and the cost is lowered.
Owner:京磁材料科技股份有限公司

Preparation methods of bisphenol A modified phenolic resin and modified phenolic resin molding material

The invention relates to the technical fields of synthesis and modification of polymers and specifically relates to preparation methods of bisphenol A modified phenolic resin and a modified phenolic resin molding material. The preparation method of the bisphenol A modified phenolic resin comprises the following steps: 1) adding phenol and acid into a reactor, and carrying out stirring to obtain areaction solution; 2) dropwise adding formaldehyde into the reaction solution obtained in step 1) step by step to obtain a reaction solution; 3) adding bisphenol A into the reaction solution obtainedin step 2) step by step to obtain a reaction solution; 4) adding melamine into the reaction solution obtained in step 3) step by step, and carrying out a reaction for 1-3 h; and 5) carrying out reduced-pressure dehydration to obtain the modified phenolic resin. The preparation methods have the beneficial effects that according to the preparation method provided by the invention, the phenolic resinis modified by adopting the bisphenol A and the melamine, the bisphenol A and the melamine are added within a specific time interval, so that the prepared phenolic resin and the phenolic resin molding material have good oxidation resistance, and a phenolic molding plastic product with a light-color appearance can be prepared by adopting the modified phenolic resin.
Owner:沙县宏盛塑料有限公司

Nanometer crystal cellulose composite antioxidant nano-filtration membrane and method for preparing same

The invention discloses a nanometer crystal cellulose composite antioxidant nano-filtration membrane and a method for preparing the same. The method includes carrying out interfacial polymerization on porous support membranes by the aid of water-phase monomers and oil-phase monomers; forming a nanometer crystal cellulose composite aromatic polymer functional skin layer on each porous support membrane to obtain the nanometer crystal cellulose composite antioxidant nano-filtration membrane. The nanometer crystal cellulose composite antioxidant nano-filtration membrane and the method have the advantages that nanometer crystal celluloses are compounded in the aromatic polymer functional skin layers of the nanometer crystal cellulose composite antioxidant nano-filtration membrane, the surfaces of the nanometer crystal celluloses contain a large quantity of hydroxyl, and accordingly the water flux of the nanometer crystal cellulose composite antioxidant nano-filtration membrane can be greatly improved; ester bonds can be formed by the hydroxyl of the surfaces of the nanometer crystal celluloses in interfacial polymerization procedures and can stably exist in sodium hypochlorite, and accordingly the nanometer crystal cellulose composite antioxidant nano-filtration membrane is difficult to oxidize in acid pickling procedures and is excellent in antioxidant activity; procedures for preparing the nanometer crystal cellulose composite antioxidant nano-filtration membrane are easy to implement, reaction conditions are mild, and accordingly the nanometer crystal cellulose composite antioxidant nano-filtration membrane and the method have excellent industrial production bases and broad application prospects.
Owner:ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products