267 results about "Cyclohexane" patented technology

The present invention relates to a composition containing A) 60 to 93 wt. % of at least one aromatic polycarbonate, polyester carbonate or mixtures thereof, B) 2 to 20 wt. % of a polyester on the basis of an aromatic or cycloaliphatic dicarboxylic acid or mixtures thereof and cyclohexane dimethanol and optionally an additional aliphatic diol, and C) 1 to 20 wt. % of at least one phosphorus-containing flame retardant. The invention also relates to a component that contains the composition and to the use of components B and C in the indicated quantities in order to improve CTI and flame retardancy of polycarbonate compositions.

The present invention provides a polyester heat-shrinkable film containing recycled materials and a preparation method thereof, belonging to the technical field of polymer synthetic films. The raw materials of the polyester heat-shrinkable film include recycled PET polyester particles, PET polyester chips, and a modified masterbatch; the modified masterbatch is prepared from polyethylene terephthalate-1,4-cyclohexanedimethanol ester, triphenyl phosphite, polyethylene glycol block copolymer, nano-silica, and hyperbranched polyester amine; the polyethylene glycol block copolymer is prepared from polyethylene glycol and γ-valerolactone under the action of a catalyst; the hyperbranched polyester amine is prepared from trimethylolpropane, methyl crotonate, and diethylenetriamine. The product of the present invention has excellent properties such as excellent unidirectional anti-shrinkage performance and low haze.

The present invention combines a fluorescence sensor with an array to provide a fluorescence sensing array detection platform and a detection method for multiple plasticizers. The fluorescence sensing array detection platform includes a B-doped graphene quantum dot solution using N,N-dimethylformamide as a solvent and a B-GQDs solution using cyclohexane as a solvent; the fluorescence intensity of the B-GQDs solution with DMF as the solvent at the fluorescence characteristic peak obtained under ultraviolet light excitation at a wavelength of 350 nm, and the fluorescence data at 391 nm, 413 nm, and 434 nm are used as array points 1, 2, and 3; the fluorescence intensity of the B-GQDs solution with CH as the solvent at the fluorescence characteristic peak obtained under ultraviolet light excitation at a wavelength of 350 nm, and the fluorescence data at 386 nm, 408 nm, and 430 nm are used as array points 4, 5, and 6; thus, a 3×2 fluorescence sensor array is constructed. The detection method using the fluorescence sensor array of the present invention has simple steps, and has satisfactory specificity, reproducibility, stability and practicability, and has application potential.

The invention discloses a crystallinity low-melting-point polyester fiber and a preparation method thereof, and relates to the technical field of polyester fibers, the crystallinity low-melting-point polyester fiber is composed of a skin layer and a core layer, and a skin-core integrated crystallization design is adopted; the skin layer is modified copolyester, and the core layer is modified PET; the modified copolyester is prepared from the following raw materials in parts by weight: 38 to 42 parts of terephthalic acid, 12 to 15 parts of 2, 5-furandicarboxylic acid, 28 to 32 parts of 1, 4-cyclohexanedimethanol, 8 to 10 parts of polycaprolactone, 1.0 to 1.5 parts of a crystallization coordinating agent, 0.5 to 1.0 part of an antioxidant and 0.3 to 0.5 part of a hindered amine light stabilizer. The crystallization coordinating agent is prepared by compounding hydroxylated graphene and maleic anhydride grafted polyolefin elastomer according to a mass ratio of (2 to 3): 1. The fiber is good in high temperature resistance and durability, low in melting point, good in size stability and long in service life.

The invention provides a scintillator film for a real-time X-ray dosimeter as well as a preparation method and application of the scintillator film. The preparation method comprises the following steps: weighing Eu (NO3) 3.6 H2O, Tb (NO3) 36H2O, Lu (NO3) 36H2O, NaF and NH4F to prepare powder B; preparing a rare earth fluoride material C from the powder B; weighing a polydimethylsiloxane prepolymer and a curing agent, adding the polydimethylsiloxane prepolymer and the curing agent into a cyclohexane solution, and performing ultrasonic dispersion to obtain a mixture D; adding the rare earth fluoride material C and PMMA particles into an ethanol solution, and uniformly dispersing to obtain a mixture E; dropwise adding the mixture E into the stirred mixture D, and performing vacuum mixing to obtain a mixture F; and transferring the mixture F to the surface of a ceramic plate which is respectively cleaned by water, ethanol and acetone and dried, coating to form a thin film, heating and annealing, and cooling to obtain the flexible scintillator thin film NaLuF4: Tb < 3 + > / Eu < 3 + > coated PDMS which is used for a real-time X-ray dosimeter.

The utility model provides a caprolactam rectification heat energy coupling utilization system, which comprises a cyclohexane refining tower, a cyclohexene separation tower and a debenzolization tower which are communicated in sequence, in the system, high-temperature gas-phase materials generated by the cyclohexane refining tower and the cyclohexene separation tower and kettle bottom liquid in the next tower are subjected to heat exchange treatment through a falling film evaporator, and the cyclohexene separation tower and the kettle bottom liquid in the next tower are separated; the feeding temperature of the next tower is increased, so that the heat utilization of high-temperature steam is improved, the use of steam is reduced, and the production cost is reduced; meanwhile, the use of fire coal is reduced, the emission of waste gas is reduced, and the environment is protected.

The invention relates to the technical field of waterproof materials, and particularly discloses an acrylic acid waterproof coating and a preparation method thereof. The acrylic acid waterproof coating provided by the invention is prepared from the following raw materials: a weather-resistant high-elastic emulsion, a modified filler, an auxiliary agent and water, the weather-resistant high-elasticity emulsion is prepared from the following raw materials: high-elasticity acrylic emulsion, vinyl-terminated hydroxyl-terminated fluorine-containing silicone oil, diisocyanate and dihydric alcohol; the modified filler is prepared from the following raw materials: barium sulfate, wollastonite, oleic acid modified titanium dioxide, an anionic dispersant and 2-ethylhexyl diphenyl phosphate; the auxiliary agent is prepared from cyclohexane-1, 2-dicarboxylic acid diisooctyl ester. Through the design of the weather-resistant high-elastic emulsion and the modified filler, and in cooperation with the specific plasticizer and other auxiliaries, the comprehensive properties such as adhesive force, water resistance, weather resistance and low temperature resistance of the acrylic waterproof coating are improved.

The invention relates to the technical field of powder coatings, and provides a high-temperature-resistant powder coating and a preparation method thereof. The high-temperature-resistant powder coating is prepared from the following raw material components in parts by mass: 18 to 22 parts of vinyl silicone resin, 12 to 22 parts of novolac epoxy resin, 1 to 6 parts of 1, 4-cyclohexanedimethanol glycidyl ether, 12 to 14 parts of acrylic resin, 50 to 60 parts of filler and 2 to 3 parts of curing agent, the mass content of vinyl in the vinyl silicon resin is 1.29%-1.33%. According to the technical scheme, the problem of poor high-temperature resistance of the powder coating in the related technology is solved.

The compound cis)-N—((S)-1-(6-(4-fluoro-1H-pyrazol-1-yl)pyridin-3-yl)ethyl)-1-methoxy-4-(4 methyl-6-(5-methyl-1H-pyrazol-3-ylamino)pyrimidin-2-yl)cyclohexanecarboxamide can be prepared as a free base in various crystalline solid forms, and in various salt forms each having one or more solid forms.

The invention discloses a modified cake meal protein-based degradable membrane material as well as a preparation method and application thereof. The membrane material is prepared from the following raw materials: a modifier and a cake meal protein solution, the modifier is prepared from the following raw materials: aryl diazacyclohexane and a three-arm star s-P (NIPAM-co-DMAM); the modifying agent and the cake protein form a three-dimensional cross-linked network structure through an electric field auxiliary curing technology, the prepared membrane material has excellent mechanical properties and controllable degradation characteristics, meanwhile, low-temperature efficient forming is achieved, production energy consumption is remarkably reduced, and an innovative solution is provided for high-value utilization of agricultural waste.

This invention relates to the field of medicinal chemistry, and in particular to a method for preparing gaticycline esters. The method for preparing gaticycline esters provided by this invention includes the following steps: reacting compound I, an acid-binding agent, and a solvent to obtain the gaticycline ester; the structural formula of compound I is: [structural formula missing]; the particle size of the acid-binding agent is ≤48 μm. The method for preparing gaticycline esters of this invention avoids the degradation and demethylation reaction of the generated gaticycline ester, thereby avoiding the generation of impurity compounds, and can obtain gaticycline esters with high yield and high purity.

The present invention provides a polyester wherein: a dicarboxylic acid constituent unit includes 72.5 mol% or more of a constituent unit derived from 2,6-naphthalenedicarboxylic acid and / or an ester derivative thereof among a total 100 mol% of said dicarboxylic acid constituent units; and a diol constituent unit includes 27.5 mol% or more of a constituent unit derived from 1,4-cyclohexanedimethanol and a constituent unit derived from 2,2,4,4-tetramethyl-1,3-cyclobutanediol among a total 100 mol% of said diol constituent units. A feeding bottle according to the present invention is formed using said polyester.

The present invention relates to a process for the preparation of trioxane derivatives.

This invention discloses a magnetically supported thioether-chelated nitrogen heterocyclic carbene palladium complex MNPs-NHC-Pd, its preparation method, and its applications. Using an amino alcohol as a starting material, an imidazole derivative containing a hydroxyl group on the N-substituent is obtained through a condensation and ring-closing reaction. This derivative is then subjected to substitution reactions with thionyl chloride and cyclohexanethiol sequentially to obtain an imidazole derivative containing a thioether on the N-substituent. This derivative is then reacted with 1,3-dibromopropane to obtain an N-bromopropyl-N'-cyclohexane thioether-substituted imidazole bromium salt. This salt is then reacted with Pd(OAc)₂ or PdCl₂ via a direct metallization reaction to obtain the N-bromopropyl-substituted thioether-chelated nitrogen heterocyclic carbene palladium complex NHC-Pd. The NHC-Pd complex is then reacted with amino-functionalized magnetic nanoparticles (MNPs-NH₂) to prepare the magnetically supported thioether-chelated nitrogen heterocyclic carbene palladium complex MNPs-NHC-Pd. It not only possesses the activity of homogeneous nitrogen heterocyclic carbene palladium catalysts, but also has a simple synthesis method, high yield, and is easy to separate and reuse in catalytic C-C bonding reactions, showing good application prospects in the field of catalysis.

The invention belongs to the technical field of nano calcium carbonate, and particularly relates to a preparation process of special nano calcium carbonate for rubber and plastic, which comprises the following steps: adjusting the density of refined lime milk, and adding a dispersing agent to obtain atomized slurry; a C02 / N2 mixed gas is introduced into the bottom of the carbonization tower, the atomized slurry is vertically sprayed out from the top, an amorphous intermediate is generated through a reaction, and a carbonized solution is obtained; transferring the carbonized solution to a carbonization kettle, adding a crystal form control agent, cyclohexane, a nonionic surfactant and a cosurfactant, and carrying out ultrasonic dispersion to form a water-in-oil microemulsion; introducing C02 / N2 mixed gas into the carbonization kettle, and carrying out carbonization reaction to obtain nano calcium carbonate slurry; the modified nano calcium carbonate slurry is subjected to dehydration, washing, drying and air jet pulverization, and the special high-specific-surface-area spherical-like network-shaped nano calcium carbonate particles for rubber and plastic are obtained. According to the process, integration of high reinforcing performance and long-acting anti-ultraviolet function of the nano calcium carbonate in the rubber is realized.

The present invention provides a polyester wherein: a dicarboxylic acid constituent unit is a constituent unit derived from 2,6-naphthalenedicarboxylic acid and / or an ester derivative thereof; and a diol constituent unit includes a constituent unit derived from any isosorbide, and 27.5 mol% or more of a constituent unit derived from 1,4-cyclohexanedimethanol among a total 100 mol% of said diol constituent units. A feeding bottle according to the present invention is formed using said polyester.

The purpose of the present invention is to provide a polyester-based heat-shrinkable film which is suitable for heat-shrinkable label applications and which is less apt to become loose after having been applied as labels and does not become distorted when applied as labels. This polyester-based heat-shrinkable film has ethylene terephthalate units, and the polyester resin components include the following amorphous components: 8-20 mol% of 1,4-cyclohexanedimethanol-derived constituent unit included in 100 mol% of the diol components; and an adipic-acid-derived constituent unit and an isophthalic-acid-derived constituent unit included in 100 mol% of the dicarboxylic acid components in such amounts that the molar ratio of the content of each of the constituent units to the content in mol% of the 1,4-cyclohexanedimethanol-derived constituent unit is 0.1-0.5. The polyester-based heat-shrinkable film has a hot-water shrinkage and a shrinkage stress which satisfy given ranges.

The invention relates to the technical field of sesamol extraction, in particular to a sesamol extraction process for food preservation, which comprises the following steps: step 1, raw material pretreatment: pretreating prepared sesame raw materials, selecting qualified sesame raw materials, removing impurities, rinsing the sesame raw materials with clear water, and draining the sesame raw materials for later use; step 2, carrying out drying treatment on the drained sesames; and step 3, squeezing and degreasing the dried sesame to obtain sesame cake meal and sesame oil. Microwave pretreatment is adopted to replace traditional baking, more polyphenol active ingredients are reserved, dried sesame is squeezed and degreased, purified sesame oil serves as a raw material and is soaked in organic solvents such as ethyl alcohol and petroleum ether, a soaked mixed solution is separated and purified, the mixed solution is subjected to reduced pressure distillation and concentration, an extracting solution is obtained, and the finished product is obtained. And carrying out freeze drying or vacuum drying to obtain a crude extract, and recrystallizing the crude extract with petroleum ether or cyclohexane to obtain the high-purity sesamol, so that the purity of the sesamol obtained by the method is high.

The application discloses a binary amine containing cyclohexane and norbornane structure, a preparation method and application in preparing transparent nylon. The application synthesizes a binary amine monomer containing cyclohexane and norbornane structure, and copolymerizes the binary amine monomer with aliphatic binary acid or norbornane-containing binary acid, aliphatic binary amine or norbornane-containing binary amine, to synthesize a transparent nylon containing norbornane structure. The cyclic structure with norbornane on the molecular chain can cause the regularity of the molecular chain to be destroyed, the crystallization ability to be reduced, the transparency of the nylon to be effectively improved, the processability of the nylon to be effectively improved due to the fact that a large number of cyclic structures are contained in the polymer chain and the polymer chain is a straight chain structure, the nylon has excellent thermal performance and mechanical performance, and the nylon has good solvent resistance and low dielectric constant.

The invention discloses a bio-based low-carbon environment-friendly functional furan polyester fiber and a preparation method thereof. The invention belongs to the technical field of macromolecules, and particularly relates to a polyfurandicarboxylic acid cyclohexanedimethanol-ethylene glycol copolyester fiber. The invention also provides a preparation method of the bio-based furan copolyester, and the bio-based furan copolyester obtained according to the preparation method provided by the invention has higher crystallinity and crystallization rate, excellent fiber mechanical properties and remarkable antibacterial property, and is a sustainable environment-friendly fiber with good comprehensive properties. The bio-based furan copolyester fiber and the like can be widely applied to the related fields of conventional clothes, home textiles and the like.

The invention provides a whitening composition as well as a preparation method and application thereof, and belongs to the technical field of cosmetics. According to the whitening composition provided by the invention, the isopropyl lauroyl sarcosinate, the diisopropyl sebacate, the PPG-14 polyglycerol-2 ether, the bis-diethoxy diglycol cyclohexane 1, 4-dicarboxylate and the poly C10-30 alkanol acrylate are used as oil phases to wrap the whitening components (magnolol, pterostilbene, ferulic acid and dimethyl methoxy benzodihydropyranol) so as to form oil sacs, so that the whitening composition can be used for whitening the skin; and then dispersing in a polyhydric alcohol and carbomer matrix to control the composition of the oil phase and the whitening component, so that the whitening effect and the transdermal absorption effect of the whitening composition are improved.

The present invention relates: to a tablet formulation comprising crystalline Hydrate 1 Modification A form of the compound 3-(3-chloro-2-methoxy-anilino)-2-[3-[[(2S)-l,4-dioxan-2-yl]methoxy]-4-pyridyl]-1, 5,6,7- tetrahydropyrrolo[3,2-c]pyridine-4-one, of formula (A): wherein the content of water is greater than 0% (w / w), particularly greater than 0% and less than or equal to 4%, of the total weight of said compound of formula (A); to methods of preparing said tablet formulation, and to uses of said tablet formulation in the prophylaxis and / or treatment of diseases.

The invention discloses a preparation method of a low-rolling-resistance and wet-skid-resistant semi-steel radial tire, belongs to the technical field of tire manufacturing, and is used for solving the problem that tread rubber used by a semi-steel radial tire in the prior art needs to balance rolling resistance and wet-skid resistance at the same time. Wherein the tread rubber comprises modified solution polymerized styrene-butadiene rubber, natural rubber, butadiene rubber, an accelerant, an anti-aging agent, solid silane, white carbon black, zinc oxide, an anti-aging agent composition, wax, stearic acid, carbon black, an accelerant CBS and oil-extended sulfur powder, and the preparation method of the modified solution polymerized styrene-butadiene rubber comprises the following steps: mixing the solution polymerized styrene-butadiene rubber, cyclohexane and 3-chloroperoxybenzoic acid, reacting, adding a catalyst, and stirring to obtain the modified solution polymerized styrene-butadiene rubber. The epoxidized solution polymerized styrene-butadiene rubber is obtained; in a nitrogen atmosphere, uniformly mixing epoxidized solution polymerized styrene-butadiene rubber, maleic anhydride grafted polypropylene, xylene and an initiator, and reacting to obtain modified solution polymerized styrene-butadiene rubber; the low-rolling-resistance and wet-skid-resistant semi-steel radial tire obtained by the invention has good comprehensive performance and conforms to the energy-saving concept.

Provided herein are p-carboline compounds of formula (I) [0537], or forms thereof, and uses thereof to inhibit dihydroorotate dehydrogenase (DHODH), wherein R1, R2, R3, R4 and R5 are as defined herein. (I)

This invention belongs to the field of fertilizer additive technology, specifically relating to a Cu-containing additive. Ⅱ The coordination polymers, preparation methods, and applications are described. The preparation methods include: synthesizing N,N'-bis(3-pyridinecarboxamide)-1,2-ethane using nicotinic acid and 1,2-ethylenediamine as raw materials; and synthesizing Cu-containing polymers from N,N'-bis(3-pyridinecarboxamide)-1,2-ethane, CuCl2·2H2O, and 1,4-cyclohexane using a hydrothermal method. Ⅱ The coordination polymer [Cu(1,4-chdc)(3-dpye)]·3H2O is a blue crystal. The product prepared in this invention is used as a fertilizer additive in urea to reduce the conversion of urea N to ammonium nitrogen and ammonium nitrogen to nitrate nitrogen during urea application, thereby reducing the volatilization of NH3 into the air after urea application and the subsequent volatilization of N2O.

The invention discloses a centrifugal filter device for producing alkyl cyclohexyl cyclohexanecarboxylic acid, which comprises an outer sleeve barrel, a variable-frequency transmission component is mounted in the outer sleeve barrel, bent connecting rods are fixedly mounted on two sides of the bottom of the outer sleeve barrel, and a fixing plate is fixedly mounted at one end, far away from the outer sleeve barrel, of each bent connecting rod. A driving assembly is fixedly installed at the bottom of the fixing plate, two connecting columns are fixedly installed at the bottom of the fixing plate, a communicating box is fixedly installed at the bottoms of the two connecting columns, and the bottom of the communicating box communicates with a liquid discharging pipe; through the arrangement of the variable-frequency transmission assembly, the device can continuously change the rotating speed of the throwing and filtering assembly, and the centrifugal force can be dynamically adjusted through continuous speed change, so that substances with different densities and particle sizes are subjected to the action of different centrifugal forces in the centrifugal process. The dynamic centrifugal force adjustment can more thoroughly separate dry and wet components in the materials, and compared with a traditional stable-speed throwing and filtering device, the separation effect is more remarkable.

The invention belongs to the technical field of wearing armours, particularly relates to a composite material 3D (three-dimensional) wearing armour, and aims to solve the problems that the existing wearing armour is relatively high in hardness and poor in fitting property in the use process, part of materials can release harmful substances, or pollution is caused to the environment in the production, use and discarding processes, and the wearing armour cannot be used for a long time. In order to solve the problems in the prior art that certain environmental protection and health risks exist in the prior art, the invention provides the following scheme that the material comprises the following raw materials in parts by weight: 40-60 parts of thermoplastic polyurethane; the thermochromic coating is prepared from thermoplastic polyurethane, polyvinyl butyral, polymethyl methacrylate, a polyolefin elastomer, diisononyl cyclohexanedicarboxylate, acetyl tributyl citrate, nano silicon dioxide aerogel, cellulose nanocrystal, organic montmorillonite, thermochromic microcapsules, rare earth aluminate fluorescent powder, polyethylene wax and fumed silica, and the thermochromic coating is prepared from the following components: thermoplastic polyurethane, polyvinyl butyral, polymethyl methacrylate, polyolefin elastomer, diisononyl cyclohexanedicarboxylate, acetyl tributyl citrate, nano silicon dioxide aerogel, cellulose nanocrystal, organic montmorillonite, thermochromic microcapsules, rare earth aluminate fluorescent powder, polyethylene wax and fumed silica. By using polyethylene glycol, the hardness and flexibility of the product are effectively improved, and the product is environment-friendly, non-toxic and harmless.

The invention discloses a plugging agent for drilling fluid and a preparation method thereof, and relates to the technical field of plugging agent preparation, the plugging agent is prepared from the following materials: 300-400 parts of cyclohexane, 100-150 parts of sorbitol monostearate, 50-100 parts of polysorbate, 50-100 parts of acrylic acid, 50-100 parts of acrylamide, 100-150 parts of sulfonate, 200-300 parts of water, and 50-100 parts of mineral fiber. By accurately regulating and controlling the particle size of the emulsion and the dispersity of the mineral fibers, the plugging agent can effectively fill pores in the drilling process, the rapid and lasting plugging effect is achieved, particles of the plugging agent are fine and uniform, the problem of incomplete plugging caused by non-uniform particle size of a traditional plugging agent is effectively solved, and the plugging effect is good. The plugging agent can keep good stability under high-temperature, high-pressure and complex environmental conditions, is especially suitable for complex stratums and water-sensitive stratums which are difficult to treat, can maintain the plugging effect for a long time, and reduces the need of secondary operation.

The invention relates to a polyamide (PA) exhibiting a melting temperature Tm strictly below 290 DEG C and comprising repeating units formed by polycondensation of a diamine component (A) and a dicarboxylic acid component (B), in which: c) the diamine component (A) comprises:-between 15.0 and 25.0 mol% of 1, 6-hexamethylenediamine; between 18.0 and 30.0 mol% of a diamine selected from the group consisting of 1, 9-diaminononane, 1, 10-diaminodecane, and a combination of said two diamines; between 50.0 and 64.0 mol% of a diamine selected from the group consisting of 1, 3-bis (aminomethyl) cyclohexane, 1, 4-bis (aminomethyl) cyclohexane and a combination of said two diamines; the proportions in mol% are based on the total amount of diamines in the diamine component (A); d) the dicarboxylic acid component (B) comprises:-between 95.0 and 100.0 mol% of terephthalic acid; between 0 and 5.0 mol% of another diacid selected from the group consisting of isophthalic acid, adipic acid and a combination of the two said diacids; the proportions in mol% are based on the total amount of dicarboxylic acids in the dicarboxylic acid component (B).