147 results about "Tert butyl" patented technology

This invention provides a breathable plaster matrix for application and its preparation method, belonging to the field of polymeric dressings and plasters. The plaster matrix raw materials include terpene-modified rosin beeswax, hydrogenated rosin glyceryl ester, camellia oil, castor oil, stearic acid hydrophobically modified microcrystalline cellulose, zinc oxide, glycerin, coated citric acid, sodium bicarbonate, polyethylene glycol, camphor, and menthol. The terpene-modified rosin beeswax is prepared by reacting rosin and α-pinene in the presence of di-tert-butylperoxyisopropylbenzene, followed by the addition of white beeswax and maleic anhydride, and then the addition of trimethylolpropane. The stearic acid hydrophobically modified microcrystalline cellulose is microcrystalline cellulose coated with stearic acid. The coated citric acid is citric acid coated with hydrogenated castor oil. This invention's plaster matrix significantly improves skin breathability, application comfort, and biocompatibility while ensuring sufficient adhesion, formability, and drug loading capacity.

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The present invention includes novel compositions and methods for treating comprising a compound with the Formula I:wherein n=0, 1, 2, 3, 4, or 5; X=NH or O or S; Y=phenyl, or a phenyl group substituted with at least one methyl, a phenyl group substituted with at least one nitro, a phenyl group substituted with at least one nitrogen, a phenyl group substituted with at least one boron, aryl, substituted aryl, heteroaryl, four to six membered cycloalkyl, four to six membered heterocycloalkyl; R=H, C(O)R2, SO2R2; R1=H, C(O)R2, SO2R2; R2=Ethyl, methyl, isopropyl, n-propyl, t-butyl, n-butyl, NH2, NR3R4; R3, R4=Ethyl, methyl, isopropyl, n-propyl, t-butyl, n-butyl, three to six membered cycloalkyl, and Z=NH, or O, or none, and optionally wherein both X and Z are not both S, and wherein the amount of the compound is selected to either inhibit or activate the immune response.

This invention relates to an alcohol-based fuel additive, its preparation method, and its application, belonging to the technical field of diesel fuel additives. The additive, by weight, comprises: a mixture of C3-C10 fatty alcohols, fatty acid methyl esters, methyl tert-butyl ether, isoamyl nitrate, dimethyl carbonate, and diesel fuel. The mass ratio of methyl tert-butyl ether to dimethyl carbonate is [value missing]. This invention employs a stepped feeding process, solving the problem of combustion improver failure caused by high shear heat generation by cooling the fuel before adding isoamyl nitrate, and ensuring long-term fuel stability at -10°C using a specific polarity gradient ratio. The fuel prepared by this invention has a high cetane number, strong power, and good anti-stratification effect, making it suitable for compression ignition engines.

This invention relates to a method for testing the resistance to phenolic yellowing of carbodiimide anti-hydrolysis agent powder and its application. The testing method includes: (1) grinding the sample to be tested and spreading it evenly in a petri dish; (2) placing 2,6-di-tert-butyl-p-cresol in a petri dish of the same size as in step (1); (3) placing the test reagent in a container; (4) placing the petri dish from step (1), the petri dish from step (2), and the container from step (3) into a sealed container for aging; (5) immediately using a colorimeter to detect the yellowing index of the sample after aging in step (4). The method of this invention can accurately detect powdered or crystalline carbodiimide anti-hydrolysis agents, solving the problem that it is currently impossible to accurately detect the phenolic yellowing resistance of powdered samples.

The invention is directed to a crosslinkable polyethylene composition comprising an additive composition consisting of polyethylene glycol and a mixture of 4,4′-thiobis (2-tertbutyl-5-methylphenol) plus thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

The present application belongs to the technical field of polymer adhesive material, and particularly relates to a resin composition for bonding polyolefin material and a preparation method thereof. The present application is prepared by formula screening optimization, and the ratio of the storage modulus E'30 at 30 DEG C to the storage modulus E'130 at 130 DEG C is greater than 100. The polyurethane resin is used in combination with butadiene-styrene copolymer with butadiene content greater than 60% and butadiene-styrene-vinylpyridine copolymer, so that the adhesive with good fusion and good adhesion to polyethylene base material is obtained. The allyl silicon modified pyridine monomer, allyl silicon modified carbazole monomer and lauryl acrylate are polymerized, and the prepared acrylate polymer is used in combination with the polyurethane resin. The pyridine group, tertiary butyl group, carbazole group and silicon atom in the acrylate polymer and the dodecyl group in the lauryl acrylate are used to improve the adhesion strength to the polyolefin base material.

This application relates to the field of organic synthesis technology, specifically disclosing a process for preparing tert-butyl vinyl ether. The raw materials include solid tert-butanol, acetylene, tetrahydrofuran solvent, and potassium hydroxide catalyst, supplemented with auxiliary materials such as type 3A molecular sieves and activated alumina adsorbents. The preparation method involves: after dehydration and purification of the raw materials, the materials are introduced into a reaction vessel; temperature and pressure are controlled, and the reaction endpoint is monitored using an infrared spectrometer; byproducts are quenched and acetylene is recovered; the process involves multi-stage condensation, water washing to remove impurities, distillation separation, and solvent purification and recycling, with simultaneous integration of waste heat recovery and continuous material feeding. The tert-butyl vinyl ether prepared by this process, as an important fine chemical intermediate, can be used in coatings, adhesives, and polymer material modification, possessing advantages such as high purity and good stability. The preparation method achieves efficient utilization of materials and energy through multi-stage synergistic linkage, combining the advantages of green environmental protection, continuous and stable operation, and high resource utilization.

This invention discloses a method for preparing impact-resistant and cold-resistant polyvinyl chloride (PVC) conduit, belonging to the field of PVC material technology. In this invention, butyl rubber is complexed with dioctyl sebacate and active silica under the initiation of tert-butyl hydrogen peroxide. This complex acts as a flexible dispersed phase in the PVC matrix, effectively absorbing and dissipating impact energy and lowering the glass transition temperature of the material. This allows the conduit to maintain excellent toughness and crack resistance even at low temperatures. Furthermore, it works synergistically with impact modifiers in the system. Ethylene-vinyl acetate copolymer provides elastomer toughening, while maleic anhydride-styrene graft copolymer acts as a highly efficient compatibilizer and interfacial reinforcing agent. The compounded structure forms a toughening network, achieving toughening from molecular chain segment movement to microstructure, thus improving impact strength. Subsequent addition of reinforcing fibers of the same specification further enhances the strength of the conduit. Overall, this results in a PVC conduit with excellent strength, impact and cold resistance, and thermal properties.

The present application relates to the technical field of metal material chemical cleaning, and discloses an environment-friendly cleaning agent for degumming of a metal surface, comprising: tert-butyl hydrogen peroxide, diethylene glycol monobutyl ether, polyoxyethylene polyoxypropylene copolymer with a multi-branched structure, and deionized water, wherein the diethylene glycol monobutyl ether forms an associated structure with the tert-butyl hydrogen peroxide through hydrogen bonds; after the cleaning agent penetrates into the gap between the oxide film and the gum layer on the metal surface, the Lewis acid center of the oxide film competitively cuts the hydrogen bonds, induces in-situ decomposition of the tert-butyl hydrogen peroxide to release oxygen, and the interface pressure generated by the oxygen converts chemical energy into normal mechanical work, realizes whole peeling of the gum layer from the interface root, suppresses diffusion loss of the solvent in the gum layer body phase, and shortens the cleaning period without damaging the metal matrix.

This invention relates to the field of organic synthesis technology, specifically to a highly efficient and stable Grignard preparation and its green preparation method. By weight, it comprises 8-18 parts of a magnesium source, 40-92 parts of a halogenated hydrocarbon, 150-200 parts of a green solvent, 15-20 parts of ethylene glycol dimethyl ether, and 2.3-3.2 parts of a synergistic stabilizer. The green solvent is 2-methyltetrahydrofuran, or a composite solvent with a weight ratio of 2-methyltetrahydrofuran:methyl tert-butyl ether of 150-160:40-50. The synergistic stabilizer is composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 0.8-1.2 parts of butylated hydroxytoluene, or composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 1.0 part of phenothiazine. This invention uses a green solvent system to replace traditional toxic and harmful solvents, and combines it with a solvent recovery process to achieve solvent recycling, which greatly reduces waste emissions and makes the production process safer and more environmentally friendly, in line with the development direction of green chemical industry.

This invention relates to a weather-resistant polyoxymethylene (POM) automotive sun visor material and its preparation method, belonging to the field of polymer materials technology. The weather-resistant POM automotive sun visor material prepared by this invention possesses excellent mechanical properties, UV aging resistance, and color fastness. This invention synthesizes an aging-resistant additive containing phosphate ester groups, triazine rings, morpholine rings, and tert-butyl groups. This additive can simultaneously exert peroxide decomposition, UV absorption, free radical scavenging, and steric stabilization effects, achieving efficient and in-situ synergistic effects at the molecular scale, solving the problems of component separation and asynchronous action in traditional systems. Furthermore, the aging-resistant additive synthesized in this invention, due to its polarity matching, can form uniform and strong intermolecular interactions (such as hydrogen bonds) with the POM matrix, serving as a dynamically reversible physical crosslinking point. This effectively improves the material's rigidity and strength while enhancing impact toughness through an energy dissipation mechanism.

This invention discloses a single-component moisture-curing conductive and thermally conductive adhesive and its preparation process, comprising the following raw materials in parts by weight: 100 parts SMP adhesive; 15-30 parts flake silver powder; 500-900 parts spherical silver-coated copper powder; 0-400 parts dendritic silver-coated copper powder; 10-20 parts decamethyltetrasiloxane; 1-1.5 parts β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate isooctyl ester; 7.5-10 parts N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane; and 1-1.5 parts vinyltrimethoxysilane. This invention allows the adhesive to cure at room temperature / low temperature using moisture in the air, eliminating the need for temperatures above 120°C. This completely avoids thermal stress damage to heat-sensitive substrates such as plastics, flexible circuit boards, and PET / PI films, making it perfectly suited for low-temperature processing scenarios such as flexible electronics manufacturing, wearable devices, and flexible sensors.

This invention discloses a coconut oil antibacterial and deodorizing essence, its preparation method, and its application. The essence consists of: 12-50% coconut oil, 4-10% butylene glycol, 0.1-2% sodium hyaluronate, 1-5% panthenol, 2-5% lactic acid, 2-5% potassium lactate, 1.5-6% emulsifier, 0.1-0.6% 4-tert-butylcyclohexanol, 0.1-6% ectoine, 0.1-6% ergothioneine, 1-2% non-irritating preservative composition, and the remainder being pure water. The components work synergistically. Disposable sanitary products using this essence can inhibit bacteria and deodorize, soften the skin, relieve itching, improve redness, and soothe sensitivity. Washing and care products using this essence have good inhibitory effects on harmful bacteria, build a natural biological protective film on the skin surface, and have anti-inflammatory, soothing, repairing, anti-itch, and redness-reducing properties, leaving the skin moisturized and firm.

The application discloses a method for preparing di-tert-butyl dicyclohexyl-18-crown-6 by hydrogenating di-tert-butyl benzene-18-crown-6, wherein the catalytic system comprises a high-loading rhodium catalyst with a content of 3-10 wt% and a low-loading rhodium catalyst with a content of 0.05-1 wt%, which are prepared respectively and physically mixed to form active site distribution with different metal surface densities, and the catalyst is prepared by a deposition precipitation method so that Rh particles are uniformly dispersed on the surface of an alumina carrier. The system can realize efficient aromatic crown ether hydrogenation under mild conditions and has a good industrial application prospect.

The application provides a long-term high-temperature thermal-oxidative aging resistant flame-retardant polypropylene insulating material and a preparation method and application thereof, and preparation raw materials of the long-term high-temperature thermal-oxidative aging resistant flame-retardant polypropylene insulating material include polypropylene grafting antioxidant modified material, EMA resin, halogen-free flame retardant, auxiliary antioxidant, metal ion passivator and lubricant; and preparation raw materials of the polypropylene grafting antioxidant modified material include polypropylene, hindered phenol monomer, methyl methacrylate and di-tert-butyl peroxide isopropyl benzene. The flame-retardant polypropylene insulating material provided by the application solves the problems of spraying and precipitation caused by high antioxidant addition amount when the polypropylene material meets the long-term high-temperature thermal-oxidative aging resistance requirement from the root, and the degree of PP thermal-oxidative aging degradation and negative chain reaction in the later stage are further reduced as the PP tertiary carbon hydrogen is consumed in the grafting process, and the long-term high-temperature thermal-oxidative aging resistance of the material as a whole is further improved.

The utility model discloses a methyl tert -butyl ether sampling detection device relates to methyl tert -butyl ether technical field, including the extraction pipe, the surface fixedly connected with the pivot of extraction pipe, the surface of extraction pipe is opened with the square hole, the fixedly connected with the discharge gate of extraction pipe surface square hole department, the outside of pivot is inserted with the connecting shaft, the outside rotation is connected with the collection box of connecting shaft, the surface fixedly connected with the baffle of collection box. The utility model through baffle divides the inside of collection box into several cabins, through with the specified cabin corresponding mark rotates to the display hole department, then will sample liquid extraction to the inside of extraction pipe, then will device upset, then to the one side rotation limit rod of fixed plate arc shape, through the spring's elasticity, will piston rod push back, and stop moving at the front side of spacing septum, and the sample of extraction flows into the specified cabin inside due to the action of gravity, then rotates the knob to the next mark department again, thereby realizes the sample of multiple extraction and separates storage.

This invention relates to the field of road maintenance engineering technology, specifically disclosing a temperature-sensitive composite adhesive and a method for repairing damaged asphalt pavements. The temperature-sensitive composite adhesive uses ordinary emulsified asphalt as a base material, adding SBS modifier, styrene-butadiene rubber, a temperature-sensitive modifier, a stabilizer, and an antioxidant. The temperature-sensitive modifier is a melt blend of polyethylene glycol 4000 and polyethylene glycol 1000; the stabilizer is nano-montmorillonite; and the antioxidant is 2,6-di-tert-butyl-p-cresol. The proportions of the temperature-sensitive modifier and stabilizer are adjusted according to different climatic regions. The repair method using this adhesive includes the following steps: S1 gradient modification pretreatment of the bonding surface, S2 preparation and application of the temperature-sensitive composite adhesive, and S3 interface pressing and curing. The adhesive of this invention exhibits excellent high-temperature stability and low-temperature fluidity, resulting in high flexural and compressive strength of the repaired pavement. The interface is dense with no significant water seepage, meeting the needs for efficient and long-term repair of pavements with different climatic zones and varying degrees of damage, demonstrating good applicability.

The application discloses a Schiff base catalyst, a preparation method thereof and a preparation method of allyl glycidyl ether. The Schiff base catalyst comprises a Schiff base ligand and a central metal ion, wherein the Schiff base ligand is a condensate of ethylenediamine, one molecule of 3,5-di-tert-butyl salicylaldehyde and one molecule of 5-tert-butyl salicylaldehyde, and the central metal ion is selected from any one of Sn, Al and Fe. The Schiff base catalyst can efficiently catalyze the ring opening of allyl alcohol and epichlorohydrin, and the reaction period can be compressed to 3 hours. Meanwhile, the asymmetric structure of the Schiff base complex can effectively control the ring opening position of epichlorohydrin, improve the ring opening selectivity, and the methylene ring opening selectivity can be up to 99%.

This application discloses an organic compound and its uses, as well as an organic electroluminescent device, relating to the field of organic electroluminescent materials technology. The organic compound has the structural formula shown in formula (I): L1 and L2 are each independently selected from single bonds, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C5-C30 heteroaryl groups, and do not contain triazine or its derivatives, carbazole or its derivatives, or anthracene or its derivatives; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C5-C30 heteroaryl groups, or formed into a ring with adjacent atoms; R1 and R2 are each independently selected from substituted or unsubstituted methyl groups, substituted or unsubstituted tert-butyl groups, substituted or unsubstituted cyclopentyl groups, substituted or unsubstituted hexyl groups, or substituted or unsubstituted adamantyl groups, and the substituent is deuterium when substituted; the hydrogen in the organic compound can optionally be replaced with deuterium. This organic compound can significantly improve the performance of organic electroluminescent devices.

The application discloses a synthesis method of 4-ethyl-2-methylphenol and 5-ethyl-2-methylphenol. The method uses a small amount of meta-p-ethylphenol mixture and methyl alcohol to carry out fixed-bed catalytic methylation reaction, controls the reaction at a low methanol / ethylphenol ratio, a low ethylphenol conversion rate and a low temperature, and the methylation reaction mainly generates 4-ethyl-2-methylphenol, 5-ethyl-2-methylphenol, 3-ethyl-2-methylphenol, 3-ethyl-4-methylphenol and other products; the 4-ethyl-2-methylphenol / 5-ethyl-2-methylphenol mixture is reacted with formaldehyde to obtain linear methyl ethyl phenolic aldehyde resin and a pesticide intermediate 4-ethyl-2-methylphenol, or the 4-ethyl-2-methylphenol / 5-ethyl-2-methylphenol is subjected to tert-butylization, rectification, tert-butyl removal and rectification to obtain 99% 4-ethyl-2-methylphenol, 99.5% 5-ethyl-2-methylphenol and other products, so that the application field of coal-converted meta-p-ethylphenol mixture is expanded.

This invention provides a method and system for preparing ethylene glycol mono-tert-butyl ether, relating to the field of chemical synthesis technology. The method for preparing ethylene glycol mono-tert-butyl ether includes: in a plug flow reactor, ethylene glycol and isobutylene undergo an etherification reaction in the presence of a liquid acid catalyst to obtain a mixture one; the mixture one is subjected to azeotropic separation to obtain a mixture two containing ethylene glycol mono-tert-butyl ether and ethylene glycol di-tert-butyl ether; the mixture two is purified and separated to obtain ethylene glycol mono-tert-butyl ether and ethylene glycol di-tert-butyl ether respectively; the separated ethylene glycol di-tert-butyl ether is returned to the plug flow reactor so that the subsequent etherification reaction can be carried out in the presence of ethylene glycol di-tert-butyl ether. This invention utilizes a plug flow reactor reaction and reactive distillation technology, and employs a liquid acid catalyst to provide a high concentration of protons, reducing the activation energy of the reaction, thereby efficiently activating the reactant molecules and achieving the goal of efficiently producing ethylene glycol mono-tert-butyl ether.

This invention provides a method for preparing chiral N-tert-butylsulfonamide compounds. The method uses N-tert-butylsulfonylimide as a starting material, employs Mn(CO)₅Br and a chiral PNN ligand as catalysts, and an alcohol as a solvent. A hydrogenation reaction occurs in this homogeneous catalytic system, yielding axially chiral diaryl nitrophenol compounds in high yield (99%) and with high ee values ​​(>99%). This reaction has the advantages of high efficiency, mild conditions, and environmental friendliness. The obtained chiral N-tert-butylsulfonamide can be deprotected with a sulfonyl protecting group to obtain the corresponding chiral primary amine.

The present application relates to the field of SAPO-5 molecular sieve, discloses a kind of metal-containing SAPO-5 molecular sieve catalyst and its preparation method and application and the method for preparing p-tert-butyltoluene.The catalyst includes SAPO-5 molecular sieve and active metal, the active metal is at least one selected from group VIII metal element and IB group metal element;M XPS / M XRF The value of not more than 0.15.The metal-containing SAPO-5 molecular sieve catalyst provided by the present application has simple preparation method, can promote m-tert-butyltoluene to transform into p-tert-butyltoluene in m-tert-butyltoluene isomerization reaction, effectively improves isomerization reaction performance, reduces side chain cracking reaction, further improves the yield of p-tert-butyltoluene, and realizes continuous production of p-tert-butyltoluene in fixed bed reaction, which has good industrial application prospect.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of maropintan and an intermediate thereof. The preparation method comprises the following steps: S1: 3-quinuclidinone or a salt thereof is reacted with benzophenone under the condition of a base, a first solvent, to obtain 2-(diphenyl methylene) quinuclidin-3-one; S2: the obtained 2-(diphenyl methylene) quinuclidin-3-one is reacted with an amine source and hydrogen under the condition of a chiral ruthenium catalyst, an optional additive and a second solvent, to obtain an intermediate (2S, 3S)-2-diphenyl methyl quinuclidin-3-amine; and S3: the obtained (2S, 3S)-2-diphenyl methyl quinuclidin-3-amine is subjected to a condensation reaction with 5-tert-butyl-2-methoxy benzaldehyde (formula V) in the presence of an acid and a third solvent, and is reduced by palladium carbon or platinum carbon and hydrogen to obtain maropintan. The method has the advantages of low-cost and easily-available raw materials, a short synthesis route, high-yield one-step reaction of double chiral centers, good selectivity, simple process, high product yield and low cost.