2100 results about "Tert butyl" patented technology

The invention provides a redox imidazole covalent organic framework material as well as a preparation method and application thereof, belongs to the technical field of material preparation and photocatalytic preparation of hydrogen peroxide, and aims to solve the technical problem of low activity of a current covalent organic framework in preparation of hydrogen peroxide. The preparation method of the imidazole-connected redox type imidazole covalent organic framework material comprises the following steps: respectively reacting a reactant 2, 7-di-tert-butylpyrene-4, 5, 9, 10-tetraketone monomer with 4, 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ' The preparation method comprises the following steps: mixing 4, 4 '-(pyridine-2, 4, 6-triyl) tribenzaldehyde and a tri (4-formylphenyl) amine monomer, adding a solvent and a catalyst, uniformly stirring, and reacting to obtain the redox type imidazole covalent organic framework material after the reaction is finished. The application comprises the following steps: adding the covalent organic framework, oxygen and the sacrificial agent into water, and reacting under the irradiation of visible light. The preparation method is green, environment-friendly, simple and easy to implement, the prepared material has good thermal stability, and efficient visible light photocatalysis preparation of hydrogen peroxide can be achieved; meanwhile, the catalyst can be recycled and has good photocatalytic stability.

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention discloses an antistatic polyisoprene rubber anesthesia air storage bag, and relates to the technical field of anesthesia air storage bags. The antistatic polyisoprene rubber anesthesia air storage bag is prepared from the following raw materials in parts by weight: 100 parts of polyisoprene latex, 0.5 to 2 parts of a stabilizer, 1 to 2 parts of a sodium p-styrenesulfonate aqueous solution, 3 to 6 parts of nano silicon dioxide suspension dispersion liquid, 1 to 2 parts of an anti-aging agent, 0.8 to 2 parts of conductive graphite and 3 to 6 parts of a vulcanization bag, the anti-aging agent is prepared by the following steps: reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with glycerol 1-oleyl ether-d5 to generate an esterification product, epoxidizing the esterification product with hydrogen peroxide and formic acid, and reacting the epoxidized product with N-phenyl-1, 3-phenylenediamine, and has excellent migration resistance. By adding the anti-aging agent into the polyisoprene rubber, the anti-aging capability of the anesthesia air storage bag is improved.

The invention belongs to the technical field of rubber preparation, and discloses a seawater-corrosion-resistant high-resilience low-compression-deformation modified ethylene propylene diene monomer rubber material as well as a preparation method and application thereof. The modified ethylene propylene diene monomer material comprises the following components: ethylene propylene diene monomer, a polyolefin elastomer, a filler, a processing aid, tackifying resin, an anti-aging agent, and at least one of an optional softening dispersant, a vulcanizing agent, an accelerant and a scorch retarder, the processing aid comprises zinc methacrylate; the accelerant comprises p-benzoquinone dioxime; and the anti-aging agent comprises 2, 6-di-tert-butyl-4-methylphenol. According to the invention, from the perspective of formula design, the high-temperature thermo-oxidative aging resistance, the hydrothermal thermal aging resistance and the compression permanent deformation resistance in a high-concentration seawater environment of the EPDM are improved in a targeted manner.

The invention belongs to the technical field of coking product extraction and organic separation, and particularly relates to a method for refining 2, 3, 5-tricresol and 3-methyl-5-ethyl phenol from a tricresol mixture. According to the method for refining the 2, 3, 5-tricresol and the 3-methyl-5-ethyl phenol from the tricresol mixture, the tricresol mixture is rectified to obtain the mixed tricresol, the mixed tricresol and the isobutene are subjected to the tert-butylation reaction under the action of the catalyst, and due to the fact that the 2, 3, 5-tricresol and the 3-methyl-5-ethyl phenol do not react with the isobutene, the 2, 3, 5-tricresol and the 3-methyl-5-ethyl phenol are not reacted with the isobutene. The method comprises the following steps: taking 2, 3, 5-trimethylphenol as a raw material, reacting other phenols with isobutene to generate corresponding tert-butyl phenol, boiling point of a tert-butyl product is obviously higher than that of 2, 3, 5-trimethylphenol and 3-methyl-5-ethyl phenol, performing rectification to obtain a 3-ethyl-5-cresol crude product and a 2, 3, 5-trimethylphenol crude product, and performing solvent refining and melt crystallization to obtain 3-ethyl-5-cresol of which the content is greater than or equal to 99% and 2, 3, 5-trimethylphenol of which the content is greater than or equal to 99%.

The invention relates to the technical field of chemical synthesis, and particularly provides a preparation method of a semaglutide side chain, which comprises the following steps: step S1, carrying out reaction on octadecanedioic acid mono-tert-butyl ester and trifluoroacetic acid pentafluorophenyl ester to generate a first intermediate; s2, enabling the first intermediate to react with 1-tert-butyl L-glutamic acid to generate a second intermediate; s3, enabling the second intermediate to react with pentafluorophenyl trifluoroacetate to generate a third intermediate; and S4, carrying out an amidation reaction on the third intermediate and 17-amino-10-oxo-3, 6, 12, 15-tetraoxa-9-aza-heptadecanoic acid, so as to generate a semaglutide side chain, and carrying out an amidation reaction on the third intermediate and 17-amino-10-oxo-3, 6, 12, 15-tetraoxa-9-aza-heptadecanoic acid. According to the preparation method disclosed by the embodiment of the invention, the pentafluorophenyl trifluoroacetate is used as the condensation reagent for two times to activate the carboxylic acid, and the amidation reaction is carried out for two times to construct the amido bond after each activation, so that compared with the traditional carbodiimide and urea positive ion type condensation reagent, the chiral racemization in the condensation process can be effectively avoided, and the yield of the product is improved. The condensation chiral racemization impurity can be lower than 0.3%.

The present disclosure relates with the development of a process for producing gels from polymeric materials crosslinked with organic agents and their use controlling water in porous media under high salinity and temperature conditions. The characteristics of these gels enable them to have a good performance withstanding extreme conditions in mature Mexican oil wells and in others located in other parts of the world. The gels featured in the present disclosure include novel ionic terpolymers based on acrylamide (AM), N-vinylpyrrolidone (VP), N,N′-methylenebisacrylamide (BAA), 1-vinyl-3-butylimidazolium bromide (VIM4C[Br]) and organic crosslinking agents.

The invention relates to the technical field of cables, in particular to a high-toughness halogen-free flame-retardant crosslinked cable and a preparation method thereof.High-density polyethylene, ethylene-vinyl acetate copolymer, modified MXene and auxiliaries are mixed and co-extruded, and ultraviolet radiation crosslinking is adopted to prepare a reinforcing layer of the cable; the preparation method comprises the following steps: firstly, coating MXene with dopamine, treating with tert-butyldimethylsilyl chloride, then grafting DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), and then introducing double bonds on the composite MXene; a self-repairing polyurethane emulsion, modified MXene and a photoinitiator are blended to prepare a protective coating, the surface of the reinforcing layer is coated with the protective coating, light curing treatment is carried out, and the water-resistant and corrosion-resistant protective layer sleeve with the self-repairing surface is prepared; a chain extender containing boric acid ester bonds and disulfide bonds is added in the preparation of the self-repairing polyurethane emulsion, and pentaerythritol triacrylate is used as a photosensitizer.

The embodiment of the invention provides a method for separating various phenols from cresol containing 2, 6-xylenol, which utilizes the characteristics that 2, 6-xylenol, 2, 4-xylenol, 2, 5-xylenol and isobutene can only generate mono-tert-butylated phenol, m-cresol, p-cresol and o-ethyl phenol, and o-cresol and isobutene can generate di-tert-butylphenol, and contains 2, 6-xylenol, 2, 4-xylenol, 2, 5-xylenol and 2, 4-xylenol. According to the method, cresol containing 2, 6-xylenol is subjected to the steps of monoalkylation, rectification, dialkylation, rectification, dealkylation, rectification and the like to realize separation of various phenols, so that the problem that the quality of m-cresol and p-cresol is influenced by 2, 6-xylenol when cresol extracted from medium-low temperature phenol-containing coal tar is separated is solved.

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention provides a preparation method of tert-butyl peroxybenzoate, and relates to the technical field of tert-butyl peroxybenzoate synthesis, the preparation method comprises the following steps: S1, pumping liquid caustic soda and water into a reaction kettle; s2, tert-butyl hydroperoxide is added into the reaction kettle for a salt forming reaction; s3, after the salt forming reaction is finished, benzoyl chloride and a catalyst are added for a condensation reaction, and a tert-butyl peroxybenzoate crude product is obtained; and S4, carrying out alkali washing and water washing on the tert-butyl peroxybenzoate crude product, and adding a stabilizer and a cosolvent to obtain a finished product. The preparation method can improve the yield and stability of tert-butyl peroxybenzoate.

The invention discloses a method for detecting antioxidants and polyphenols in food by constructing a colorimetric sensing array based on monatomic iron nano-enzyme, and belongs to the field of nanotechnology and colorimetric sensing. The traditional monatomic nano enzyme shows limited enzyme-like activity and substrate specificity, and is difficult to meet the comprehensive requirements of detecting various antioxidants and polyphenols in food. In the research, a novel nano-enzyme system (sdsFeN (at) G) of monatomic iron nano-enzyme is developed. The SdsFeN (at) G shows excellent enzymatic activity, and a three-channel colorimetric sensing array is constructed by utilizing inhibition of different antioxidants and polyphenols on oxidation of three chromogenic substrates, so that simple, convenient and reliable identification and detection of five substances (tert-butylhydroquinone, butylated hydroxyanisole, propyl gallate, catechol and hydroquinone) in food are realized.

The invention discloses a method for preparing tert-butyl ethylbenzene through alkylation of ethylbenzene and isobutene. In a reactor, a raw material containing ethylbenzene and isobutene is in contact with a catalyst for an alkylation reaction to obtain a product containing tert-butyl ethylbenzene, by changing the proportion of the shell ZSM-12 molecular sieve in the hydrogen-type Beta-coated ZSM-12 core-shell molecular sieve and combining high-temperature water vapor treatment, the obtained catalyst shows excellent catalytic performance in liquid-phase alkylation reaction of ethylbenzene and isobutene. The catalyst preparation process is simple to operate and easy for industrial production. The development of a p-tert-butyl ethylbenzene production technology is favorably promoted.

The invention belongs to the technical field of insulator materials, and particularly relates to an insulating busbar and a preparation method thereof. The preparation method of the insulating busbar comprises the following steps: coating glue on the surface of a busbar base material, and drying to obtain a busbar with a bonding layer; the preparation method comprises the following steps: mixing 40 to 60 parts of silicon resin, 20 to 40 parts of grafted silicon dioxide, 10 to 20 parts of aluminum oxide and 2 to 4 parts of 2, 5-dimethyl-2, 5-bis-(tert-butylperoxy) hexane, so as to obtain a sizing material; placing the busbar with the bonding layer in a mold, then adding a sizing material, and pressing to obtain an insulating busbar; the preparation method of the grafted silicon dioxide comprises the following steps: stirring m-aminobenzoic acid and 3-aminopropyltriethoxysilane for reaction to obtain a grafting solution, and adding silicon dioxide into the grafting solution for grafting reaction to obtain the grafted silicon dioxide.

The invention discloses a method for analyzing oligosaccharide composition in American ginseng polysaccharide, and belongs to the technical field of pharmaceutical analytical chemistry, and the method comprises the following steps: 1) carrying out primary extraction on American ginseng through a methanol / methyl tert-butyl ether solution, and removing supernate to obtain American ginseng subjected to primary extraction; (2) adding pure water into the American ginseng subjected to primary extraction, extracting again, taking supernate, adding absolute ethyl alcohol into the supernate, standing, and centrifuging to obtain precipitate; 3) dissolving the precipitate with water, adding an n-butyl alcohol / chloroform solution, mixing and oscillating, and drying the aqueous solution to obtain crude polysaccharide; 4) adding water into the crude polysaccharide for redissolving, adding trifluoroacetic acid for reaction, and centrifugally concentrating to obtain oligosaccharide; and 5) dissolving the oligosaccharides in an acetonitrile aqueous solution, taking a sample to be detected, and detecting by using liquid chromatography-mass spectrometry to obtain the variety and proportion of the oligosaccharides in the sample to be detected. The problem that the structure of American ginseng polysaccharide is difficult to identify and analyze in the prior art is solved.

The invention relates to a glass fiber reinforced PET composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material is prepared from the following raw materials in parts by weight: 100 parts of PET (Polyethylene Terephthalate) master batch, 32 to 45 parts of modified glass fiber, 0.19 to 0.24 part of nucleating agent, 1.6 to 2 parts of lubricating agent and 0.12 to 0.15 part of antioxidant, the modified glass fiber is prepared by grafting sulfydryl on the surface of glass fiber by KH-580 to prepare sulfhydrylated glass fiber, reacting tert-butyldimethylamine with 2-bromoethanol to form hydroxyl-terminated quaternary ammonium salt, substituting with octylene trichlorosilane to form a modifier, and adding alkenyl containing alkyl long chains introduced into the modifier molecule with the sulfydryl grafted on the surface to prepare the modified glass fiber. Introducing modifier molecules to the surfaces of the glass fibers; and the modified glass fiber improves the strength of the composite material and keeps high impact resistance.

The present invention relates to the electrochemical oxidation of allylic C- H bonds in specific compounds to obtain specific α,β unsaturated ketones in the presence of t-butyl hydroperoxide. This process is particularly suitable for the electrochemical oxidation of cholesterol, stigmasterol, campesterol, β-sitosterol, brassicasterol, 25-hydroxycholesterol, 24-hydroxycholesterol, lanosterol, pregnenolone, and the esters thereof.

A high-permeability inclusion for relieving skin redness, heat and pain, a preparation method therefor, and a use thereof. The inclusion comprises a capsule shell and capsule content encapsulated in an inner cavity of the capsule shell; the capsule shell comprises a nonionic surfactant, a co-surfactant, cholesterol, 4-tert-butyl cyclohexanol, a saffron extract and water; the capsule content comprises a Tephrosia purpurea seed extract and a Kadsura longepedunculata extract; in terms of parts by mass, the contents of the components in the wrapping body are as follows: a total mass of the nonionic surfactant, co-surfactant and cholesterol is 1.6-16.5 parts; a total mass of the 4-tert-butyl cyclohexanol, saffron extract, Tephrosia purpurea seed extract and Kadsura longepedunculata extract is 0.4-10 parts; and water is 0.2-4 parts. The inclusion has good permeability and can achieve instant and long-lasting effects in improving redness, heat and pain.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention belongs to the technical field of OAB-14 medical chemistry and preparation thereof, and particularly relates to a crystal form D of OAB-14 and a preparation method thereof. The preparation method of the crystal form D of OAB-14 comprises the following steps: adding OAB-14 into a solvent, and carrying out suspension pulping, heat preservation stirring, suction filtration and drying to obtain the crystal form D. The solvent is one of THF (tetrahydrofuran), MeOH (methanol), EtOH (methanol), EA (ethyl acetate) and MTBE (methyl tert-butyl ether). The suspension pulping temperature is 15 to 25 DEG C. And the heat-preservation stirring time is 1-5 days. After the OAB-14 is added into the solvent, the concentration of the OAB-14 is 0.005 g / mL to 0.01 g / mL. According to the preparation method of the crystal form D of OAB-14 provided by the invention, the crystal form D is an anhydrous crystal form with high crystallinity, high dissolution rate and high stability.

The invention provides a composite additive based on 2, 6-butylated hydroxytoluene, phosphate fire-resistant oil and application, the composite additive is a mixture of 2, 6-butylated hydroxytoluene and Revonox 501, the addition amount of 2, 6-butylated hydroxytoluene is 0.01%-0.10%, the addition amount of Revonox 501 is 0.0020%-0.0050%, the addition amount of 2, 6-butylated hydroxytoluene is 0.01%-0.10%, the addition amount of 2, 6-butylated hydroxytoluene is 0.0020%-0.0050%, and the addition amount of 2, 6-butylated hydroxytoluene is 0.01%-0.10%. After the phosphate fire-resistant oil is added with the composite additive, the comprehensive performance of the phosphate fire-resistant oil in the operation process can be improved, and the defects that after new phosphate fire-resistant oil is loaded into a system, the action flexibility of a steam turbine assembly is reduced and a servo valve of a speed regulating system is corroded and jammed due to the phenomena that the acid value is increased, the resistivity is reduced, oil sludge is generated and the like in the use process are overcome; and the operation safety of a turbine set of a power plant is influenced.

The invention relates to the field of high polymer materials, and particularly discloses an EVA and rubber blended antistatic sole material and a preparation method thereof. The EVA and rubber blended antistatic sole material is prepared from the following raw materials in parts by weight: 70 to 80 parts of a main material, 20 to 30 parts of rubber, 1 to 1.5 parts of dicumyl peroxide, 15 to 20 parts of filler, 10 to 15 parts of an antistatic agent, 0.8 to 1.2 parts of zinc stearate, 4.5 to 5.5 parts of a foaming agent, 1.5 to 3 parts of a foaming aid and 0.5 to 1 part of an antioxidant, the main material comprises POE (Polyolefin Elastomer), LDPE (Low-Density Polyethylene) and an ethylene-vinyl acetate copolymer in a mass ratio of 1: (1-1.5): ( The antistatic agent is prepared from graphene, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane and triallyl isocyanurate. The blended sole material has the advantages of being low in density, light and convenient to wear, lasting in antistatic effect and high in wear resistance.

A method for preparing an intermediate of an adrenergic receptor agonist. The method comprises the following steps: cyclizing the compound of formula E1 or the compound of formula E2 and the compound of formula F0 to obtain the compound of formula C, wherein R1 is methyl, ethyl, isopropyl, propyl, tert-butyl, or butyl; R3 is H, Cl, F or Br; and L1 and L2 are each individually a leaving group. The method uses easily available raw materials, avoids the use of toxic and harmful reagents, is mild in terms of reaction conditions, is simple to operate, achieves a substantial improvement in yield and reduction in cost, and is more favorable for commercial production.

The invention belongs to the technical field of insulating oil, and provides a slow-release antioxidant as well as a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing octadecyl trimethyl ammonium bromide, 2, 6-butylated hydroxytoluene, tetraethoxysilane, water and ammonia water, and reacting to obtain the antioxidant; and (2) in a protective atmosphere, mixing the antioxidant, ethanol, water and gamma-mercaptopropyltriethoxysilane, and carrying out a reaction so as to obtain the slow-release antioxidant. The slow-release antioxidant suitable for the synthetic ester insulating oil is prepared through a physical coating means and oleophylic modification, has excellent solubility, can effectively inhibit the increase of the acid value of the synthetic ester insulating oil, delays the oxidation process of the synthetic ester insulating oil, and remarkably prolongs the service life of the insulating oil. Meanwhile, through a slow release mechanism, the antioxidant can prolong the antioxidant effect of the antioxidant, improve the antioxidant stability in long-time operation and meet the higher antioxidant requirement of high-performance equipment such as a transformer for the insulating oil.

The invention discloses a preparation method and application of a photo-thermal dual-response membrane material, and relates to the field of membrane materials. When the photo-thermal double-response membrane material is prepared, a photo-thermal material firstly reacts with 4-(triethoxysilyl) aniline and then reacts with 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and p-phenylenediamine, and a modified photo-thermal material is prepared; the preparation method comprises the following steps: sequentially reacting benzaldehyde with 2-hydroxyacetophenone and 3-N, N-dimethylamino methacryloyl chloride to prepare a photo-initiation monomer; the preparation method comprises the following steps: mixing N-isopropylacrylamide, a photo-initiation monomer, N, N '-methylene bisacrylamide and a modified photo-thermal material, combining with a hydrophobic substrate membrane, preparing a membrane, and finishing the surface by using 2-bromo-1-[3, 5-di (tert-butyl)-4-hydroxyphenyl] ethanone, thereby obtaining the photo-thermal dual-response membrane material. The photo-thermal dual-response membrane material prepared by the invention has the characteristics of pollution resistance, easiness in cleaning, durability, antibacterial property, metal ion recovery and low energy consumption.

The present invention discloses a fluorosilicone rubber, a fluorosilicone rubber hose and a preparation method and application thereof. The fluorosilicone rubber is prepared from the following components calculated by weight: 50 to 70 parts of fluorosilicone raw rubber; 20 to 45 parts of high temperature flame retardant silicone rubber; 30 to 40 parts of fumed silica; 0.5 to 2 parts of diisopropylbenzene peroxide; 5 to 10 parts of hydroxy silicone oil; 1 to 3 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The fluorosilicone rubber hose of the present invention has good elasticity and flexibility, convenient installation and layout, convenient maintenance, good vibration-proof effect and high reliability. The bonding strength between the hose and the silicone is good, the fatigue resistance of the hose is excellent, the raw materials of the product are easy to obtain, the cost is low, and it is conducive to large-scale production and improving market competitiveness. The combination of fluorosilicone rubber and high temperature resistant silicone saves the cost of raw materials, and can also achieve the characteristics of high temperature resistance, weather resistance, aging resistance and flame retardancy, and at the same time has a breakthrough development in technology.

The invention discloses a detection method of a tert-butyl-(S)-[2-(2-cyano-4, 4-difluoropyrrolidine-1-yl)-2-oxyethyl] carbamate optical isomer, which adopts a high performance liquid chromatography determination method, and the determination method comprises the following steps: adopting a chromatographic column taking amylose-tri (3, 5-dimethylphenyl carbamate) as a filler, and performing gradient elution on the obtained product, thereby obtaining the tert-butyl-(S)-[2-(2-cyano-4, 4-difluoropyrrolidine-1-yl)-2-oxyethyl] carbamate optical isomer. N-hexane-ethanol-trifluoroacetic acid with the volume ratio of (700-750): (250-300): 1 is used as a mobile phase, and after a solution is prepared for sample introduction, the content of the optical isomers is calculated according to a peak area normalization method. The invention makes up the technical blank of lack of high performance liquid chromatography detection of the substance at present.

The invention relates to an insulating material, in particular to a voltage-breakdown-resistant high-insulation EPDM material and application thereof, and the voltage-breakdown-resistant high-insulation EPDM material comprises the following components: modified silicone rubber, 4, 4 '-thiobis (6-tert-butyl o-cresol), a composite filler, a cross-linking agent, 4-isopropoxybenzoic acid and an EPDM matrix; according to the voltage-breakdown-resistant high-insulation EPDM material disclosed by the invention, the comprehensive performance of the material is greatly improved and the application field of the EPDM material is widened through the matching of all the components and the specific dosage ratio of the components. The modified silicone rubber is introduced, the modified silicone rubber is obtained by modifying vinyl-containing perfluoropolyether-b-polysiloxane, in the vinyl-containing perfluoropolyether-b-polysiloxane, a perfluoropolyether chain segment has extremely low surface energy and good chemical stability, and a polysiloxane chain segment endows the vinyl-containing perfluoropolyether-b-polysiloxane with excellent flexibility and electrical insulating property.

The invention relates to the field of polyester fibers, and discloses a composite enhanced polyester fiber for bags and suitcases and a preparation method thereof.The composite enhanced polyester fiber is prepared from polyethylene glycol terephthalate slices, polyethylene glycol, tris (2, 4-di-tert-butylbenzene) phosphite, tetra [beta-(3, 4-ditert-butylbenzene)] tetrakis [beta]-(2, 4-ditert-butylbenzene)] tetrakis [beta-(3, 4-ditert The composite material is prepared from 1, 3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, modified nano-zinc oxide, tetrabutyl titanate, a chitosan aqueous solution and acetic acid. The modified nano zinc oxide is prepared from gamma-aminopropyltriethoxysilane, an ethanol water solution, acetic acid and nano zinc oxide. The composite enhanced polyester fiber disclosed by the invention has relatively good antibacterial property, hygroscopicity and mechanical property.

The invention relates to the field of cables, and discloses a fire-resistant light cable for a safety harbor-returning system for a ship and a processing method thereof.The cable comprises a guide core, a fire-resistant layer, an insulating layer, a cabling layer, an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged from inside to outside, and the inner sheath layer and the outer sheath layer are prepared by extruding sheath layer materials; the sheath layer is made of low-density polyethylene, nitrile rubber, ethylene-tetrafluoroethylene copolymer, functional additives, composite filler and auxiliaries; the functional additive is prepared by the following steps: reacting 3, 5-di-tert-butyl-4-hydroxybenzoyl chloride with 2-chloro-4, 6-diamino-1, 3, 5-triazine to obtain a modified hindered phenol component, and then reacting 1, 4-p-xylylene dichloride with 10-(2, 5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide to obtain a product, and continuously reacting the product with the modified hindered phenol component; the composite filler is prepared by modifying vermiculite with titanium dioxide and zinc oxide pillared. The cable prepared by the invention has excellent mechanical properties, flame retardance and aging resistance.