155 results about "Diphenylmethane" patented technology

The invention provides ZrB2 / SiC / TiB2 ultrahigh-temperature ceramic and a preparation method thereof, and belongs to the field of ultrahigh-temperature ceramic. The preparation method comprises the following steps: preparing SiC / TiB2 composite particles, modifying and compounding the SiC / TiB2 composite particles, preparing ceramic slurry, forming and calcining. The compounding step comprises the following steps: putting modified SiC / TiB2 composite particles and modified ZrB2 particles into N-methyl pyrrolidone, uniformly stirring, adding 4, 4 '-bismaleimide diphenylmethane, and stirring at 110-115 DEG C for 2.8-3.2 hours to obtain ZrB2 / SiC / TiB2 particles; the ceramic product prepared by the invention is high in interface bonding strength, uniform in internal structure, relatively high in toughness and strength, good in temperature resistance, stable in overall performance and excellent in comprehensive performance.

The utility model discloses a diphenylmethane series amine reaction device, and belongs to the technical field of integrated condensation reactors, the diphenylmethane series amine reaction device comprises a salifying-condensation reactor, a plug flow reactor is arranged on one side of the salifying-condensation reactor, the salifying-condensation reactor comprises a reaction kettle, a double-layer hollow stirring shaft is arranged in the reaction kettle, and the double-layer hollow stirring shaft is connected with the plug flow reactor. A static mixer is arranged on one side of the reaction kettle; the multi-nozzle static mixer with the built-in condensation assembly can strengthen the mixing effect, the static mixer is directly connected with the reaction kettle, salt forming reaction liquid can be effectively prevented from staying in a pipeline and reducing the color of a system, and the hollow stirring shaft is beneficial to rapid mixing and timely removal of reaction heat; according to the device, aniline and hydrochloric acid as well as aniline hydrochloride and formaldehyde are rapidly and uniformly mixed, reaction heat is removed, local overheating and hot spots are avoided, generation of by-products can be reduced, colors of products and downstream products are effectively improved, the quality of the downstream products is improved, and the device is suitable for large-scale industrial production and high in synthesis efficiency.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The invention provides a preparation method of a brominated benzhydryl quinoxaline ketone compound, which comprises the following step: under the condition of illumination, carrying out coupling reaction on 1-methylquinoxaline ketone and brominated diphenylmethane to obtain the brominated benzhydryl quinoxaline ketone compound. The preparation method of the brominated benzhydryl quinoxaline ketone compound provided by the invention is mild in reaction condition and simple and efficient in step.

The invention discloses a light-emitting diode packaging material and a preparation method thereof, and relates to the technical field of light-emitting diodes. The method comprises the following steps: adding 4, 4 '-diaminodiphenyl ether into pyromellitic dianhydride for condensation polymerization to obtain a polyamic acid solution, and adding zinc borate nanowires and aluminum nitride powder to prepare an inorganic skeleton enhanced polyamic acid suspension; the preparation method comprises the following steps: reacting zirconium hydroxide sol with an aluminum sec-butoxide solution, and carrying out hydrothermal reaction and high-temperature calcination to obtain ZrO2at-alpha-Al2O3 core-shell particles; the preparation method comprises the following steps: pre-polymerizing 4, 4 '-diphenylmethane bismaleimide and bisphenol A cyanate ester to obtain a prepolymer; the preparation method comprises the following steps: mixing bisphenol A type epoxy resin, inorganic skeleton reinforced polyamide acid suspension, ZrO2at-alpha-Al2O3 core-shell particles and a prepolymer under vacuum, defoaming, injecting into a mold, heating, curing, cooling and demolding to obtain the product. Through the synergistic effect of triple modification, the high temperature resistance and lasting thermal stability of the packaging material are improved, and the packaging material is suitable for the field of light emitting diode packaging with high temperature resistance requirements.

The present invention provides a hot-melt bis-maleimide resin matrix, prepreg, composite material and preparation method thereof. The hot-melt bis-maleimide resin matrix is characterized in that its preparation raw materials include the following components in parts by mass: 70-100 parts of bis-maleimide resin monomer, 50-65 parts of process modifier, 20-35 parts of reactive diluent, 10-15 parts of toughening modifier, and 10-20 parts of heat resistance modifier; wherein, the bis-maleimide resin monomer is one or a mixture of two of diphenylmethane diamine type bis-maleimide monomer and diphenyl ether diamine type bis-maleimide monomer. The hot-melt bis-maleimide resin prepreg prepared by this method has stable resin content, uniform resin distribution, low volatile content, and good drapability of the prepreg; and the prepared bis-maleimide based prepreg is applicable to a variety of composite material forming processes, expanding the application field of the prepreg.

A preparation method for diamines and polyamines of the diphenylmethane series. By means of controlling a preparation process for diamines and polyamines of the diphenylmethane series to satisfy that the neutralization phase-separation coefficient M≤1.0, the method can improve the phase separation effect after neutralization while not introducing other substances, thus facilitating stable phase separation, and improving the phase separation efficiency. The preparation method controls the preparation process for the diamines and polyamines of the diphenylmethane series to satisfy that the neutralization phase-separation coefficient M≤1.0, preferably M≤0.8, and more preferably M≤0.5, the neutralization phase-separation coefficient M being calculated according to following equation (I), and R in equation (I) being an aqueous-phase concentration index and being calculated according to following equation (II).

The invention provides a high-strength lime-sand polymerized building material and a preparation method thereof, and belongs to the technical field of building materials, and the lime-sand polymerized building material comprises calcined fly ash clinker, silica fume, lithium slag, a composite nanofiller, coal gangue, steel fiber, a polymerizing agent, a polymerization auxiliary agent and the like; the polymerizing agent is prepared by compounding a potassium silicate aqueous solution and a potassium hydroxide aqueous solution, standing, adjusting the pH value with citric acid, standing and curing; the polymerization auxiliary agent is prepared by mixing perfluorohexyl ethyl triethoxy silane, a silane coupling agent, amino dipropyl polydimethylsiloxane and diphenylmethane glycidyl ether epoxy resin. The calcined fly ash clinker, the silica fume and the lithium slag are subjected to wet grinding to prepare a precursor, and a foundation is laid for polymerization reaction. The polymerization agent and the polymerization auxiliary agent regulate the reaction process and the product structure. And the polymerization auxiliary agent improves the workability and the steel fiber distribution homogeneity. By optimizing precursor combination, a polymerization formula, a preparation process and maintenance conditions, the building material with high strength, high compactness and excellent durability is obtained.

The invention discloses a catalyst for preparing benzophenone compounds and a preparation method and application of the catalyst, the catalyst is alkaline manganese oxide and is expressed as aZOx.bMnO2, Z is any one of lithium, potassium, sodium, magnesium and calcium; x is the number of oxygen atoms required by the oxidation state of the metal element Z; a and b are respectively the atom number of Z and Mn in the catalyst, and the atom number ratio of Z to Mn in the catalyst is 0.2-10. According to the catalyst provided by the invention, the preparation method is simple, the benzophenone or halogenated benzophenone can be prepared by catalyzing efficient oxidation of diphenylmethane and halogenated diphenylmethane containing a passivation group, the catalyst activity is high, the product selectivity is high, the product is easy to separate, and the catalyst can be recycled.

The invention relates to the technical field of polymer synthesis, in particular to a dynamic response type polymer with aggregation-induced emission characteristics and a preparation method and application thereof. The dynamic response type polymer is formed by polymerizing raw materials including a compound containing a diphenylmethane structure and a derivative thereof and a sulfur-containing side chain or a directly connected sulfur-containing group compound. The dynamic response type polymer disclosed by the invention realizes a dynamic luminescence process, and solves the problems that the original AIE polymer is simple in luminescence process, low in information encryption degree and unobvious in environmental response signal; the total visible light emission can be conveniently and accurately adjusted by changing the electron supply and absorption capacity of the core group structure, the real-time emission adjustment capacity of the same material is achieved, industrial-grade raw materials and a mature synthesis process are adopted, the cost is low, synthesis is convenient, and the 4D dynamic anti-counterfeiting encryption material has wide application prospects in the field of 4D dynamic anti-counterfeiting encryption.

The present application relates to the technical field of rubber, in particular to a kind of giant engineering machinery tire anti-split body rubber composition and preparation method thereof. With 100 parts by weight of natural rubber component as benchmark, further comprising the following components: natural rubber 100 parts, carbon black 40-50 parts, zinc oxide 6-8 parts, cobalt salt 0.2-0.4 parts, antioxidant 2246 0.5-1 part, antioxidant S-TMQ 0.2-1.0 parts, N,N'-4,4'-diphenyl methane bismaleimide 0.5-1.5 parts, insoluble sulfur 8-12 parts, accelerator 0.3-0.7 parts, anti-scorching agent 0.05-0.15 parts. The present application solves the shortcomings of lower adhesive property of body rubber and insufficient anti-splitting ability of existing technology under harsh road conditions and hot and humid, steam, salt water environment, greatly reduces the occurrence probability of body delamination and bead bulging under hot and humid environment in Southeast Asia, improves the anti-splitting ability of body rubber, and ensures the service life of giant tire under high load operation.

The application belongs to the technical field of spraying materials, and particularly discloses a kind of corrosion-resistant spraying materials applied to railway freight cars and a preparation method thereof.The corrosion-resistant spraying material applied to railway freight cars provided by the application comprises component A and component B, component A comprises terminal isocyanate-based polyether type prepolymer and diphenylmethane-4,4'-diisocyanate;the terminal isocyanate-based polyether type prepolymer is prepared by reacting polyol compound and diphenylmethane-4,4'-diisocyanate;the polyol compound comprises polypropylene glycol, glycerol type polyether polyol and polyether polyol with a functionality of greater than or equal to 4.5.Component B comprises polyoxypropylene polyether polyol and diethyl toluene diamine.The application provides a corrosion-resistant, impact-resistant and strongly adhesive corrosion-resistant spraying material applied to railway freight cars by reasonably designing material components, which can effectively block corrosive media and protect the car body, and is suitable for complex railway freight transport scenarios.

To provide an injection chemical composition that can achieve both curability in water and foaming and curability in non-water environments, even after being exposed to high temperature and high humidity environments. [Solution] An injection solution composition comprising a first agent (A) and a second agent (B), wherein the first agent (A) comprises an aqueous solution of sodium silicate (A-1), an organic polyol (A-2), and a tertiary amine catalyst (A-3), and the second agent (B) comprises an organic polyisocyanate containing a mixture of diphenylmethane diisocyanate and polymethylene polyphenyl polyisocyanate having 3 or more isocyanate functional groups (B-1), or a reaction product (B-1') of an active hydrogen group-containing compound and a mixture (B-1), at least one acid component (B-2) selected from the group consisting of phosphate monoesters and phosphate diesters, and at least one hydrolyzable component (B-3) selected from the group consisting of orthoester compounds and acetal compounds.

The application belongs to the technical field of diamine and polyamine of diphenylmethane series, and particularly relates to a preparation method of diamine and polyamine (DAM) of diphenylmethane series, that is, before a condensation reaction, a mixing characteristic parameter 1.0<=M<=1.5 of a pre-reaction liquid for the condensation reaction is controlled; the pre-reaction liquid is a mixed liquid formed after a mixture of a formaldehyde solution and aniline hydrochloride or a mixture of the formaldehyde solution and aniline hydrochloride / condensation reaction liquid is pre-mixed. In the method, the mixing characteristic parameter M is controlled in a suitable range, so that the content of N-methyl impurities and the content of macromolecular polymers in the DAM product can be maximally reduced, and the running stability of a production device and the quality of downstream products can be improved.

To provide a thermosetting coating composition capable of forming a cured coating film excellent in extensibility, toughness and shielding properties.SOLUTION: The thermosetting coating composition according to the present invention comprises a polycarbonate polyol (A) and / or a polyether polyol (B), a carbodiimide-modified diphenylmethane diisocyanate (C), at least one selected from the group consisting of a trimethylolpropane adduct isocyanate (D), a biuret isocyanate (E), and an allophanate isocyanate (F), and a color pigment (G).SELECTED DRAWING: Figure 1

The application relates to the cable field and discloses a novel high-heat-dissipation energy storage device cable and a preparation method thereof. The novel high-heat-dissipation energy storage device cable comprises, from inside to outside, a core, a cross-linked polyethylene insulation layer, a shielding layer, a filling layer, an inner protective layer, an armored layer and an outer protective layer. The filling layer is filled with a composite phase change material. The composite phase change material comprises binary eutectic material, cross-linked polyurethane, graphene powder and modified spherical alumina. The cross-linked polyurethane is prepared by using PEG6000, diphenyl methane diisocyanate and boric acid as raw materials. The modified spherical alumina is prepared by grafting a modified silane coupling agent on the surface of spherical alumina through a thiol-alkene click reaction between triallyl isocyanurate and 3-mercapto propyl triethoxysilane. The filling layer filled with the composite phase change material has the characteristics of good heat conductivity, high phase change latent heat, wide phase change temperature range, good thermal cycle stability and good flame retardance.

The application relates to the technical field of electromagnetic shielding, in particular to a flexible electromagnetic shielding material and a preparation method and application thereof. The application provides a flexible electromagnetic shielding material which comprises a Ni-Fe3O4 film and a shape memory polymer film which are stacked in sequence; the Ni-Fe3O4 is prepared by a hydrothermal method; and the shape memory polymer is prepared from polytetrahydrofuran, diphenylmethane-4,4' diisocyanate, poly(dimethylsiloxane), bis(3-aminopropyl) end-capping and 1,4-butanediol. Thanks to the synergistic cooperation of the above-mentioned materials, the flexible electromagnetic shielding material has excellent comprehensive performance, and has excellent shape memory characteristics, flexibility and good electromagnetic shielding capacity, and has high practical application value and popularization prospect.

The invention relates to a composite material for a cushion pad between battery cells of a new energy battery and a preparation method of the composite material, and belongs to the technical field of cushion pads between battery cells. The chain extender is self-made, the chain extender, the hydroxyl-terminated silicone oil and the diphenylmethane-4, 4 '-diisocyanate are subjected to vulcanization forming to obtain the composite material of the cushion pad between the battery cells of the new energy battery, the chain extender contains multiple amino groups and has large steric hindrance, and after the chain extender reacts with isocyanate, the chain extender can be used for preparing the cushion pad between the battery cells of the new energy battery, so that the service life of the cushion pad between the battery cells of the new energy battery is prolonged, and the service life of the cushion pad between the battery cells of the new energy battery is prolonged. A stable three-dimensional network structure with a firm phase interface is formed, chain segment movement is greatly limited, phase separation is inhibited, the modulus and rebound resilience of the composite material cushion pad are improved, the cushion pad has excellent mechanical integrity, long-term stability and compression permanent deformation resistance, and meanwhile, due to the fact that the chain segment movement is limited, the service life of the cushion pad is prolonged. And the material can still keep good dimensional stability at high temperature.

The utility model relates to a kind of high-purity high-efficiency diphenylmethane reaction liquid distillation device, more than one regular metal packing section is arranged in upper portion of evaporation tank, evaporation tank top is connected with benzene recovery storage tank by gas phase extraction pipeline with first, second heat exchanger in proper order, heat absorption heat course import of first heat exchanger is connected with reaction liquid inlet pipe, heat absorption heat course export is connected with reboiler bottom feed, reboiler top is connected with evaporation tank middle portion, the gas phase extraction pipeline after second heat exchanger is divided into reflux pipeline, reflux pipeline is connected with evaporation tank upper portion by reflux control valve;Evaporation tank bottom or lower portion is connected with two routes, one is connected with reboiler bottom feed by circulating pipeline with circulation control valve in proper order, another is connected with diphenylmethane storage tank by liquid phase extraction pipeline with extraction control valve, extraction pump in proper order.The device structure is simple, can effectively improve diphenylmethane, benzene distillation separation purity and efficiency, meet the requirement of energy saving and consumption reduction of industrial production simultaneously.

The application belongs to the technical field of materials, and provides a bio-based bismaleimide resin and a preparation method and application thereof, the resin being prepared by copolymerization of curcumin allyl ether and N,N'-4,4'-diphenylmethane bismaleimide. The curcumin allyl ether has a beta-diketone conjugated system, and is prepared by nucleophilic substitution reaction of curcumin and allyl bromide in a potassium carbonate acetone system; when prepared, the two are cured in stages at 150-240 DEG C to form a high crosslinking network, and a vacuum degassing and curing process is combined. The bio-based bismaleimide resin provided in the application has a curing peak temperature that is 20-30 DEG C lower than that of a traditional BD resin, a Tg that is nearly 90 DEG C higher than that of the BD resin, a carbon residue rate at 800 DEG C that is greater than or equal to 42%, an LOI that is greater than or equal to 37%, reaches a UL-94 V-0 level, a THR that is as low as 12.4 kJ / g, less flammable volatile matter at high temperatures, and a high degree of carbonization of residual carbon.

The application discloses a shape-selective catalyst for preparing 4,4'-disubstituted diphenylmethane by alkylation and a preparation method and application thereof. The catalyst is composed of a molecular sieve and an oxide for modifying the molecular sieve. The oxide is an oxide corresponding to the highest valence of a modified element. The modified element includes phosphorus, titanium, zirconium, gallium, indium, germanium, molybdenum, tungsten, rhenium or copper. The mass content of the oxide in the catalyst is 0.01-20% in the catalyst with a mass of 100%. The catalyst has good thermal stability and chemical stability, can be repeatedly used, has a simple regeneration method and a high activity recovery rate.

The invention belongs to the technical field of organic fine chemical synthesis, and particularly relates to a method for green synthesis of 4, 4 '-difluorobenzophenone. According to the method for synthesizing 4, 4 '-difluorobenzophenone provided by the invention, diphenylmethane is taken as a raw material, the modified zeolite catalyst is adopted for reaction, and high conversion rate of the raw material and high selectivity of a target intermediate product can be obtained. A specific catalyst system, a reaction reagent and a reaction medium are introduced into each step, so that the yield of each step is superior to that of an existing traditional process; meanwhile, the initial raw material cost is low, the process cost is reduced, the process is safer, the selectivity is higher, and the environmental influence is smaller.

The application relates to the technical field of preparation of diamines and polyamines in a diphenylmethane series, and provides a preparation method of diamines and polyamines in a diphenylmethane series with improved 2,4-MDA selectivity; through the preparation method, the selectivity of 2,4-MDA can be improved. In the preparation method, formaldehyde and aniline are contacted and reacted in the presence of an acid catalyst to prepare the diamines and polyamines in the diphenylmethane series, and the acid catalyst is added into a reaction system in multiple steps based on the total amount of the acid catalyst.

The invention relates to a heavy anti-corrosion industrial coating and a preparation method thereof, and belongs to the technical field of paints.The heavy anti-corrosion industrial coating is mainly prepared from elastic epoxy organic silicon copolymer, diphenylmethane glycidyl ether epoxy resin, high-temperature-resistant hardening modified resin, polyphenylene sulfide resin, novolac epoxy resin and polyurethane cyanogen condensate; a specific fusion agent system, a curing agent system, a functional filler system, a functional auxiliary agent system and a solvent system are matched, a special mixing preparation method is adopted, and the obtained coating can achieve the synergistic effects of elasticity-rigidity balance, crosslinking density optimization, component dispersion uniformity, side reaction reduction and the like; various comprehensive properties such as adhesive force, salt spray corrosion resistance, temperature resistance, water resistance and weather resistance of the coating are improved.

The present invention relates to the field of polyurethane plastic technology, and discloses a kind of impact-resistant elastic plastic runway silicon PU material and preparation method thereof, the raw material of the PU material of the present invention includes component A, 100 parts of polyether polyols, 25 40 parts of fillers, 10 30 parts of organosilicon toughening agents; component B, 100 parts of polyether polyols, 68 75 parts of diphenylmethane 4,4 '-diisocyanates. There is good compatibility between the organosilicon toughening agent of the present invention and polyurethane, can be evenly dispersed in the polyurethane matrix, containing flexible siloxane structure, plays a good toughening effect on polyurethane, significantly improves the impact strength, flexural strength, wear resistance of PU materials. And the organosilicon toughening agent contains a diazinone structure with high temperature resistance, is added to polyurethane, and can improve the thermal decomposition temperature and heat resistance of the material.

The application discloses a green preparation method of 4,4'-difluorobenzophenone. The method uses 4,4'-difluorobenzene as raw material, potassium bromide as catalyst, acetic acid as solvent, and oxygen as oxidant, and 4,4'-difluorobenzophenone is generated in high selectivity through one-step oxidation under mild conditions. The application surprisingly finds that in the presence of potassium bromide, a new non-metallic catalytic oxidation system of potassium bromide / acetic acid / oxygen is used to realize high-efficiency and high-selectivity conversion of the C-H bond at the benzyl position. Compared with the traditional method, the application does not need to use a transition metal catalyst, does not need to use carbon tetrachloride and other materials damaging the ozone layer, and does not need to involve a dangerous intermediate such as a diazonium salt, the process route is short, the atomic economy is high, the product yield is high, the product purity is high, the catalyst is cheap and easy to obtain, and the application has excellent industrial application prospect and green chemistry characteristics.

The invention discloses a preparation method of bismaleimide triazine resin for a BT (bismaleimide triazine) carrier plate, and belongs to the field of high polymer materials. The preparation method of the bismaleimide triazine resin comprises the following steps: S1, mixing bisphenol A, long-chain alkyl glycidyl ether and a first solvent, carrying out a heating reaction, and after the reaction is finished, carrying out post-treatment to obtain a modifier intermediate; s2, mixing the modifier intermediate, allyl chloride and a second solvent, carrying out heating reaction, and carrying out post-treatment after the reaction is ended, so as to obtain a modifier; and S3, mixing diphenylmethane bismaleimide, bisphenol A cyanate ester and the modifier, carrying out a heating melting reaction to obtain a resin prepolymer, and carrying out curing treatment on the resin prepolymer to obtain the bismaleimide triazine resin. The bismaleimide triazine resin provided by the invention has the effect of obtaining the bismaleimide triazine resin which is good in toughness and capable of effectively maintaining heat resistance.

The purpose of the present invention is to provide a treatment agent for a carbon fiber precursor, with which it is possible to suppress degradation of a carbon fiber precursor even in cases where the carbon fiber precursor that is produced by applying the treatment agent for a carbon fiber precursor is stored for a long period of time, and with which it is also possible to achieve carbon fibers that have excellent physical properties even in cases where a carbon fiber precursor that has been stored for a long period of time is used.　A treatment agent for a carbon fiber precursor according to the present invention contains a silicone (A) that has an amino group and an aromatic compound (B) that has a diphenylmethane skeleton, and this treatment agent for a carbon fiber precursor satisfies at least one selected from among the condition 1 and the condition 2 described below. Condition 1: The acid value of the treatment agent is 0.1-30 mgKOH / g. Condition 2: A Brønsted acid compound (D) is contained therein, and the proportion of the Brønsted acid compound (D) in the nonvolatile content of the treatment agent is 0.05-10 wt%.

The invention provides a method for reducing TOC (total organic carbon) of waste brine generated in a DAM (diphenylmethane) production process, which comprises the following steps: (1) in the presence of an acid catalyst, carrying out condensation reaction, transposition rearrangement reaction and acid-base neutralization reaction on aniline and formaldehyde to obtain a diamine and polyamine brine phase containing diphenylmethane series and an organic phase; (2) carrying out extraction, steam stripping and oxidation treatment on the saline water phase to obtain waste saline water; the organic phase is purified and refined to obtain diphenylmethane diamine and polyamine; wherein the content of phenol in the aniline in the step (1) is not higher than 15 ppm, and the total content of organic impurities is not higher than 200 ppm. According to the method disclosed by the invention, the TOC content in the waste brine is reduced to 10ppm, and the requirement of recycling chlor-alkali is met.