485 results about "Cresol" patented technology

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 discloses a coating type high-molecular flame-retardant material. The composite material is prepared from the following components: organic silicon modified epoxy resin, a bio-based castor oil derivative, hydroxyapatite, carbon nanofibers, expanded graphite, ammonium polyphosphate, zinc borate, nano silicon dioxide, molybdenum oxide, microencapsulated red phosphorus, magnesium hydroxide, melamine cyanurate, aluminum diethylphosphinate, pentaerythritol, trihydroxymethyl phosphine oxide and a silane coupling agent. The coating is prepared from a titanate coupling agent, stearic acid, polyethylene glycol, 2, 6-butylated hydroxytoluene, triphenyl phosphite, 2, 4-dihydroxybenzophenone, sebacic diester, polytetrafluoroethylene micro powder, a modified polydimethylsiloxane flatting agent, organic montmorillonite, a polyether modified silicon defoaming agent and a solvent. The invention has the beneficial effects of high flame retardant efficiency, environmental friendliness, excellent comprehensive performance and excellent processability.

Transalkylation processes using catalysts comprising three dimensional 12 membered ring zeolites with a combination of small and large pores are described. These catalysts have increased conversion of alkylphenols to phenol, cresols, and alkylbenzenes from coal-derived liquid streams compared to catalysts consisting of HZSM-5 zeolite.

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 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 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 provides a synthetic method of 2-methyl-4-chloropropionic acid-polyethylene glycol ester, and belongs to the technical field of preparation of 2-methyl-4-chloropropionic acid-polyethylene glycol ester. The method comprises the following steps: adding o-cresol, dichloroethane and a catalyst, and reacting sulfuryl chloride at the temperature of below 15 DEG C; performing separation to obtain p-chloro-o-cresol and 6-chloro-o-cresol; adding p-chloro-o-cresol, 2-chloropropionic acid and caustic soda liquid to synthesize 2-methyl-4-chloropropionic acid; 2-methyl-4-chloropropionic acid is acidized, cooled, crystallized and sliced, 2-methyl-4-chloropropionic acid, polyethylene glycol and a neutral catalyst are added for a reaction, and the di-2-(4-chloro-2-methyl-phenoxy) propionic acid-polyethylene glycol ester is synthesized. The method is simple in process, mild in reaction and high in yield. By means of the synthesis method, a qualified product with the p-chloro-o-cresol content larger than 99% can be produced, other phenol impurities are not contained, the synthesis quality of p-chloro-o-cresol is guaranteed, meanwhile, synthesis of 2-methyl-4-chloropropionic acid-polyethylene glycol ester is easier to control, the product quality can be greatly improved, and meanwhile the domestic blank is filled up.

The invention provides a preparation method of cresol trozole trisiloxane, and belongs to the technical field of sun-screening agent preparation. The preparation method of cresol trozole trisiloxane comprises the following steps: carrying out Claisen rearrangement reaction on a concentrated solution of a compound as shown in a formula II to obtain a compound as shown in a formula III; and reacting the compound shown in the formula III with heptamethyltrisiloxane to obtain a compound shown in a formula IV. The concentrated solution of the compound shown in the formula II is subjected to the Claisen rearrangement reaction under the solvent-free condition to prepare the compound shown in the formula III, the reaction time for preparing the compound shown in the formula III is shortened, the reaction efficiency for preparing the compound shown in the formula III is improved, the yield for preparing the compound shown in the formula III is increased, the reaction time for preparing cresol trozole trisiloxane is shortened, and the yield of cresol trozole trisiloxane is increased. The reaction efficiency of cresol trozole trisiloxane preparation is improved, and the yield of cresol trozole trisiloxane preparation is improved.

The invention discloses a manufacturing method of a new energy power battery cooling liquid capable of improving storage stability, and belongs to the technical field of battery anti-freezing solutions, and the new energy power battery cooling liquid comprises the following auxiliary agent components and components: a) ethylene glycol which is used as a basic solvent and accounts for 40-50% of the total mass; b) deionized water accounting for 50%-60% of the total mass; c) an organic corrosion inhibitor which is selected from benzotriazole, mercaptobenzothiazole or a mixture of benzotriazole and mercaptobenzothiazole and accounts for 0.3-0.5% of the total mass; d) an antioxidant which is selected from di-tert-butyl-p-cresol, triphenyl phosphite or a mixture thereof and accounts for 0.1-0.2% of the total mass; the anti-foaming agent is selected from polydimethylsiloxane, silicone oil or a mixture of the polydimethylsiloxane and the silicone oil and accounts for 0.01%-0.05% of the total mass; and f) a pH regulator which is selected from sodium hydroxide, potassium hydroxide or a mixture thereof, is used for regulating the pH value of the cooling liquid to a suitable range of 7-9, and accounts for 0.05-0.15% of the total mass. The cooling liquid disclosed by the invention can keep the stability of key indexes such as conductivity, pH value, corrosion inhibition performance and oxidation resistance in a long-term storage process, so that the storage stability of the cooling liquid is remarkably improved.

The utility model discloses a cresol refining device which comprises a crude cresol tank, an outsourcing crude cresol tank, a light component removal tower, a tail gas return pipe, a rectifying tower and a product tank, the outsourcing crude cresol tank and the crude cresol tank are both fixed on the ground, one side of the outsourcing crude cresol tank and one side of the crude cresol tank are provided with a conveying pump, outsourcing crude cresol and crude phenol are conveyed into the light component removal tower through the conveying pump, and the tail gas return pipe is connected with the rectifying tower. The light component removal tower is fixed on the ground, a condenser is arranged above the light component removal tower, the condenser refluxes condensed materials, a tail gas return pipe is arranged above the light component removal tower, the tail gas return pipe extends downwards to enter the lower part of the light component removal tower, the light component removal tower is connected with the rectifying tower through a conveying pipe, the rectifying tower is fixed on the ground, and a condenser is arranged above the rectifying tower. A discharging pipe of the rectifying tower is connected with the product tank, the product tank is fixed on the ground, and the crude phenol tank and the outsourcing crude cresol tank are the same in structure. The device is reasonable in design; and the tail gas return pipe can convey a part of hot gas into the light component removal tower so as to improve heat recovery.

The invention relates to an organic silicon rubber pressure-sensitive adhesive color paste technology and a preparation method thereof, and the organic silicon rubber pressure-sensitive adhesive color paste is prepared from the following raw materials in parts by mass: 20-22 parts of methyl MQ organic silicon resin, 20-23 parts of organic silicon rubber, 20-25 parts of modified tackifying resin, 1-2 parts of a curing agent, 1-2 parts of a defoaming agent, 1-2 parts of a defoaming agent, and 1-2 parts of a defoaming agent. 20-25 parts of a solvent, 37-38 parts of modified toner, 3-5 parts of an antioxidant, 2-3 parts of a dispersing agent and 1-2 parts of an ultraviolet absorbent. According to the technical scheme, the anti-yellowing capacity of the color paste is improved by using 2, 6-butylated hydroxytoluene modified p-tert-octylphenol formaldehyde resin, and the stability of the color paste is improved by selecting specific modified tackifying resin and modified toner and adding the modified color paste.

The invention discloses an electrolyte and a lithium ion battery, the electrolyte comprises an organic solvent, a lithium salt, a first additive and a second additive, the first additive comprises an additive A and an additive B, the additive A comprises a benzene ring, a sulfonate group and an alkynyl group, the additive B comprises cresol diphenyl ester, and the battery comprises a positive electrode, a negative electrode and the electrolyte. The positive electrode includes a positive active material and the negative electrode includes a negative active material. And the positive electrode active material is lithium manganate. Compared with the prior art, by adding the first additive, the compactness and the stability of a CEI film on the surface of the positive electrode can be improved, the protection on positive electrode lithium manganate is enhanced, the side reaction of the positive electrode and an electrolyte caused by high-temperature decomposition of the CEI film is avoided, and the influence of manganese ion dissolution at high temperature on the battery performance is further reduced; and the high-temperature cycle performance of the lithium manganate battery is improved.

The invention provides a p-cresol oxidation catalyst and a preparation method thereof. The preparation method comprises the following steps: S1, adding a first active metal source, a second active metal source and a carrier source into water to obtain a first solution; s2, adding a precipitator into water to obtain a second solution; s3, mixing the first solution with the second solution to obtain a third solution with the pH value of 9-10; s4, carrying out hydrothermal reaction on the third solution at 100-140 DEG C to obtain a first product; s5, sequentially washing, drying and calcining the first product to obtain the p-cresol oxidation catalyst, the first active metal source is a cobalt source and a copper source, the second active metal source comprises a cerium source, and the carrier source is an aluminum source. The p-cresol oxidation catalyst with high activity and selectivity is prepared by accurately controlling the conditions of the hydrothermal reaction and the proportion of each active metal source and simultaneously forming the carrier in situ in the reaction and generation process of the catalyst.

The invention provides a method for detecting an antioxidant in a food contact plastic material or a product thereof and application of the method. The detection method comprises the following steps: mixing a sample to be detected with an organic solvent, filtering, taking filtrate, carrying out gas chromatography-mass spectrometry detection, and calculating the content of the antioxidant in the sample to be detected according to a detection result, the antioxidant comprises any one or a combination of at least two of 2, 4-bis [(dodecylthio) methyl]-6-methylphenol, 2, 6-di-tert-butyl-4-ethylphenol or 2, 2 '-methylenebis [6-(1-methylcyclohexyl)-p-cresol]. The detection method provided by the invention is simple to operate, low in detection limit and quantitation limit, high in accuracy and excellent in repeatability and reproducibility, and can effectively and accurately detect the three phenolic antioxidants at the same time.

The invention belongs to the technical field of organic matter synthesis, and particularly relates to a preparation method of 2-(2 '-hydroxy-3'-methallyl-5 '-methylphenyl) benzotriazole, in particular to a preparation method of cresol triazole trisiloxane. The invention relates to a preparation method of 2-(2 '-hydroxy-3'-methallyl-5 '-methylphenyl) benzotriazole, which comprises the following steps: mixing cresol trozole, methyl allyl chloride, Lewis acid and a first polar organic solvent, and carrying out Friedel-Crafts alkylation reaction to obtain the 2-(2'-hydroxy-3 '-methallyl-5'-methylphenyl) benzotriazole. When the 2-(2 '-hydroxy-3'-methallyl-5 '-methylphenyl) benzotriazole is prepared, the conventional Claisen rearrangement reaction is replaced, and the 2-(2'-hydroxy-3 '-methallyl-5'-methylphenyl) benzotriazole is prepared by adopting the Friedel-Crafts alkylation reaction of cresol trozole, so that the safety risk of process operation is reduced.

A method may comprise (a) inserting an insulin delivery device subcutaneously into a body of a subject, which comprises an amperometric glucose sensor comprising an electrode layer comprising an indicating electrode and underlying a redox-catalytic layer comprising a redox mediator; (b) using said insulin delivery device to deliver an insulin formulation (e.g., comprising a phenol or cresol excipient) subcutaneously to said subject; and (c) using said amperometric glucose sensor to measure a subcutaneous glucose concentration, which comprises using said redox-catalytic layer to allow electron transfer from subcutaneous glucose to said indicating electrode sufficient to cause a response of said amperometric glucose sensor at an applied bias potential of no more than +250 millivolts, wherein (b) and (c) are performed at the same time for at least one hour, while maintaining a sensor sensitivity of at least 50% of an initial sensor sensitivity for up to one hour.

A heating kettle cleaning mechanism for cresol rectification separation comprises a heating tank, a mixing assembly and a cleaning assembly are arranged in the heating tank, the mixing assembly comprises a rotating shaft rotationally installed in the heating tank, a plurality of mixing plates used for mixing are installed on the rotating shaft, and the cleaning assembly comprises a water collecting pipe installed in the heating tank. A plurality of nozzles are installed on the water collecting pipe, the nozzles can wash the inner wall of the heating tank and the mixing assembly through rotation, the rotating assembly can drive the nozzles to rotate, and the driving assembly can drive the water collecting pipe to reciprocate in the heating tank in the axis direction of the rotating shaft. A driving mechanism for driving the rotating shaft to rotate is mounted on the heating tank, a liquid adding hole is formed in the top of the heating tank, and a liquid discharging hole is formed in the bottommost part of the heating tank. The internal space of the heating kettle can be quickly and effectively cleaned, the cleaning device is suitable for the heating kettle with a stirring structure, the cleaning range is wider, the cleaning efficiency is higher, and the labor cost is greatly reduced.

The present invention discloses a lubricating oil additive for a flexible fuel engine, which comprises the following raw materials: overbased calcium alkyl salicylate, overbased sulfurized calcium alkylphenate, 4-pyridine ethylpropylene polymer, alkyl diphenylamine, 2,6-di-tert-butyl a-dimethylamino-p-cresol, and nano boron nitride BNNS. The present invention also discloses a lubricating oil composition for a flexible fuel engine, which comprises the above-mentioned lubricating oil additive for a flexible fuel engine, and further comprises an emulsifier and a base oil. The present invention can solve the key problem that a large amount of water is generated during the work combustion process of a flexible fuel engine, resulting in hydrolysis of dispersants, friction reducers and anti-wear agents in engine oil, damage to the molecular structure and loss of lubricating function. At the same time, it also solves the technical problem of difficult low-temperature cold start of a flexible fuel engine caused by water.

The invention discloses a preparation method of (R)-2-(4-chloro-2-methylphenoxy) propionate compounds, which comprises the following steps: providing compounds with structures shown in formulas I and II: R-OH formula I, in the formula I, R is selected from C1-C18 alkyl substituted or unsubstituted by hydroxyl,-(R1-O) m-R1-OH,-(R4-O-CO-O) n-R4-OH,-(R4-O-CO-R10) w-OH,-R7-O (-CO-O-(R6-O-) p) q-R7-OH, R1 is alkylene of C2-C4, m is an integer of 4-28, and R2 is an integer of 4-28; r4 is a C3-C15 alkylene group or # imgabs0 # n is an integer from 1 to 20; r10 is # imgabs1 # w which is an integer from 1 to 15; r < 6 > is isopropylidene, R < 7 > is C2-C5 alkylene, p is an integer of 1-5, and q is an integer of 5-30; in the formula II, R2 and R3 are independently selected from H, C1, Br and I, and at least one of R2 and R3 is C1 or Br or I; compounds shown in the formula I and the formula II react under the catalytic condition to generate a compound shown in the formula III, wherein R, R2 and R3 are defined as above; the compound shown in the formula III and 4-chloro-o-cresol are catalyzed by an etherification catalyst to generate a compound shown in a formula IV, and in the formula IV, R is defined as above; # imgabs2 #

The invention provides pH test paper, a preparation method thereof and a water pH detection method. The pH test paper is prepared from a test paper carrier and an indicator solution, the indicator solution comprises an indicator, a solvent, an acid-base regulator and a surfactant; the indicator comprises any one or a combination of at least two of phenol red, cresol red, neutral red, alpha-naphtholphthalein, thymol blue or bromothymol blue. When the pH test paper is used for detecting the pH of a water body, the color change is obvious, the detection sensitivity and accuracy are high, the reliability is high, and the pH test paper can be used for detecting the water body with low alkalinity and low buffer capacity.

The invention belongs to the technical field of cresol trozole determination, and discloses a method for determining cresol trozole in textiles, which comprises the following steps: S1, dissolving cresol trozole by using chromatographically pure tetrahydrofuran, and fixing the volume in a brown volumetric flask to obtain a standard stock solution; placing the standard stock solution in a brown volumetric flask, and fixing the volume with chromatographically pure methanol to obtain a standard working solution; s2, selecting a textile without cresol trozole, soaking the textile in the standard working solution, and drying to obtain a positive sample; s3, the positive sample is cut into pieces and then placed in a glass extractor, and a to-be-detected solution is obtained through extraction; s4, performing liquid chromatograph analysis on the to-be-detected solution to obtain the content of cresol trozole. The analysis method for determining the content of cresol trozole in the textile by using a high performance liquid chromatograph is established, and the method is simple and convenient to operate, high in analysis efficiency and suitable for detecting the cresol trozole in the textile.

The invention discloses a preparation method of an (R) 2-(4-chloro-2-methylphenoxy) isooctyl propionate root inhibitor. The method comprises the following steps: carrying out condensation reaction on L-2-chloropropionic acid and o-cresol under the promotion of alkali to obtain (R) 2-methylphenoxypropionic acid; carrying out esterification reaction on the (R) 2-methyl phenoxy propionic acid and isooctyl alcohol (2-ethyl hexanol) under the action of a catalyst to obtain (R) 2-methyl phenoxy isooctyl propionate; the (R) 2-methyl phenoxy isooctyl propionate is chlorinated by a chlorination reagent to obtain (R) 2-(4-chloro-2-methyl phenoxy) isooctyl propionate; the (R) 2-(4-chloro-2-methylphenoxy) isooctyl propionate obtained by the method disclosed by the invention is high in yield, good in optical activity and excellent in quality; the method has the advantages of novel synthesis route, easily available raw materials, low cost, simple and feasible process operation, short time consumption, less waste, small pollution and suitability for industrial production, and can fill the domestic blank and relieve the current situation of dependence on import.

The invention belongs to the technical field of organic synthesis and separation, and particularly relates to a method for synthesizing phenolic resin from 2, 4 / 2, 5-methyl ethyl phenol. The invention provides a method for synthesizing phenolic resin from 2, 4 / 2, 5-methyl-ethyl phenol, which comprises the following steps: adding 2, 4 / 2, 5-methyl-ethyl phenol, aldehydes and a catalyst into a reactor, carrying out an anti-thermal insulation reaction, sampling and analyzing until the content of 2, 5-methyl-ethyl phenol is less than or equal to 0.5% and is qualified, heating, decompressing and dehydrating, steaming out unreacted 2, 4-methyl-ethyl phenol and water, and dehydrating to 100-200 DEG C to obtain linear 2, 5-methyl-ethyl phenolic resin; adding a catalyst into the steamed material, heating to completely react the reacted 2, 5-methyl ethyl phenol (when formaldehyde in the steamed material is insufficient, a small amount of formaldehyde can be supplemented), adding a non-water-soluble solvent for extraction and layering, and treating a water layer in a wastewater treatment workshop; and rectifying the oil layer to obtain 99% 2, 4-methyl ethyl phenol or pesticide intermediate 4-ethyl-2-cresol.

The invention provides a mineral oil type vacuum pump oil composition and a preparation method and application thereof, and the mineral oil type vacuum pump oil composition comprises the following components by weight: 0.2-0.5% of an antioxidant; 0.4 to 0.8 part of an anti-wear agent; 0.005 to 0.02 percent of an anti-foaming agent; the balance is base oil, and the base oil is API I type paraffin-based base oil; the antioxidant is selected from at least one of 2, 6-butylated hydroxytoluene, alkylated diphenylamine or alkyl phenyl-alpha-naphthylamine; the anti-wear agent is selected from at least one of amino thioester and / or tricresyl phosphate; the anti-foaming agent is selected from polysiloxane and / or polyacrylate. According to the vacuum pump oil composition, the antioxidant, the anti-wear agent and the like in a proper proportion are added into the vacuum pump oil composition, so that the vacuum pump oil composition has relatively good anti-wear capability in the use process of oil products, also has certain anti-oxidation capability, can effectively slow down wear, and achieves a relatively good technical effect.

The application discloses a preparation method of a key intermediate of dapagliflozin, and belongs to the technical field of preparation of medical intermediates. The preparation method of the key intermediate of dapagliflozin comprises the following steps: 1, 1-ethoxy-4-methylbenzene is prepared by using p-cresol, sodium hydroxide and diethyl sulfate; 2, (4-ethoxybenzyl) phenyl sulfide is prepared by using 1-ethoxy-4-methylbenzene, thiophenol, a palladium catalyst, an alkali and an oxidant; 3, 1-benzyl-4-ethoxybenzene is prepared by using (4-ethoxybenzyl) phenyl sulfide under a hydrogen atmosphere; 4, 4-ethoxy-2'-chlorobenzhydrol is prepared by carrying out chlorination reaction on 1-benzyl-4-ethoxybenzene; and 5, 5-bromo-2-chloro-4'-ethoxybenzhydrol is prepared by carrying out bromination reaction on 4-ethoxy-2'-chlorobenzhydrol. The yield and purity of 5-bromo-2-chloro-4'-ethoxybenzhydrol prepared by the method are higher, the process is safer, and the production cost is reduced.

The invention relates to the technical field of medical medicines, and discloses a composition for relieving eye strong light burn and a preparation method thereof. The composition is prepared from the following components in percentage by weight: 0.5 to 3 percent of sodium aliphatate, 30 to 50 percent of corn starch, 25 to 45 percent of talcum powder, 1 to 4 percent of cresol, 5 to 15 percent of flos chrysanthemi indici, 0.05 to 0.5 percent of radix scutellariae, 0.01 to 0.1 percent of flos carthami, 0.1 to 1 percent of aqueous solvent and the balance of water. The preparation method comprises the following steps: crushing medicinal materials; preparing a water-phase matrix containing a water-based solvent and sodium aliphatate; performing dry mixing on corn starch, talcum powder and the medicinal material fine powder; and mixing the water phase and the solid phase, adding cresol, homogenizing, adjusting the pH value, and sterilizing to obtain a paste or pasty composition. The composition can effectively relieve ocular surface pain, lacrimation and foreign body sensation caused by strong light burn through cooperation of multiple ways of physical protection, anti-inflammatory repair and oxidation resistance.

The invention provides a preparation method of an easy-to-grind epoxy functional film and a wafer-level chip packaging structure, and relates to the technical field of chip packaging, the easy-to-grind epoxy functional film comprises the following components by mass: 10-15 parts of phenoxy resin, 10-15 parts of o-cresol novolac epoxy resin, 1-4 parts of carboxyl-terminated nitrile rubber, 15-20 parts of a latent curing agent, and 1-3 parts of an accelerator. 50-52 parts of angular silica powder and 2 parts of carbon black; wherein the molecular weight of the phenoxy resin is 30000 to 35000; the phenoxy resin and the o-cresol novolac epoxy resin are used as matrix resin, the angular silica powder is used as the filler, and the carboxyl-terminated nitrile rubber, the latent curing agent and the accelerant are combined, so that the grinding efficiency of the epoxy functional film is improved, the epoxy functional film meets the working requirements of an automatic film sticking machine and a grinding machine, and the production efficiency is improved.

The invention belongs to the field of renewable resource environment-friendly materials, and particularly relates to a method for preparing a high-performance sound insulation material by using solid waste plastics, a synthesis method of the sound insulation material, and an action principle and application of a modified material. According to the present invention, the formula is synergistic, the sound insulation, the mechanical property and the processing property are balanced, the tensile strength is more than 25 MPa, the sound insulation is excellent in the multi-frequency band, the processing is smooth, and the yield is high, which is far better than the specific components of the brand A product of the traditional recycled plastic sound insulation material: the recycled polyethylene (PE) and the polypropylene (PP) are mainly adopted, and the ratio of the recycled polyethylene (PE) to the polypropylene (PP) is about 3: 2. About 10% calcium carbonate is added as a filler to increase the hardness and weight of the material. Meanwhile, a small amount of antioxidant (about 0.5%), such as butylated hydroxytoluene (BHT), is contained and is used for delaying the aging speed of the material.

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 discloses a method for preparing anisole by taking dimethyl carbonate as a methylation reagent, a ternary concerted catalytic system is created for the first time to break through temperature limitation, phenol is efficiently activated by [BMIM] OH to generate high-activity phenoxy anions through a composite catalytic design of an alkaline ionic liquid / quaternary ammonium salt / nano metal oxide, the quaternary ammonium salt executes phase transfer and reaction path switching, and the anisole is prepared by taking dimethyl carbonate as a methylation reagent. The nano metal oxide has the effects of balance regulation and structural protection, and the conversion rate of phenol is gt according to the mass ratio of phenol to dimethyl carbonate to basic ionic liquid to quaternary ammonium salt compound to nano metal oxide being 94: (99-117): (2.82-7.52): (0.94-4.7): (0.47-3.76); the selectivity of anisole is gt; the method has the advantages that the concentration is 99%, decomposition of DMC and generation of by-products such as o-cresol are inhibited from the source, a self-settling separation-circulation method subverts a catalyst recovery mode, the by-products are directionally inhibited, the separation process is simplified, and the product can reach gt through single washing and reduced pressure distillation; and high-energy-consumption multi-tower rectification for substances with approximate boiling points in the traditional method is omitted, so that the economic benefit is greatly improved.