190 results about "Diphenylmethane" patented technology

The invention provides a hot-melt bismaleimide resin matrix, a prepreg, a composite material and a preparation method thereof, and the hot-melt bismaleimide resin matrix is characterized by comprising the following preparation raw materials by mass: 70-100 parts of a bismaleimide resin monomer, 50-65 parts of a process modifier, 20-35 parts of an active diluent, 10-15 parts of a toughening modifier, and 10-20 parts of a heat-resistant modifier; wherein the bismaleimide resin monomer is one or a mixture of two of a diphenylmethane diamine type bismaleimide monomer and a diphenyl ether diamine type bismaleimide monomer. The hot-melt bismaleimide resin prepreg prepared by the method is stable in resin content, uniform in resin distribution, low in volatile matter content and good in laying property; and the prepared double-horse-based prepreg is suitable for various composite material forming processes, and the application field of the prepreg is expanded.

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 relates to the technical field of epoxy resin composite materials, and particularly discloses an epoxy resin composition, a preparation method and an epoxy glass cloth laminated board. The epoxy resin composition is prepared from the following components in parts by weight: 100 parts of epoxy resin, 10 to 20 parts of hydroxyl-containing organic silicon, 3 to 8 parts of maleic anhydride, 0.5 to 2 parts of vinylidene compound, 5 to 15 parts of 4, 4 '-bismaleimide diphenylmethane and 30 to 60 parts of curing agent. The hydroxyl-containing organic silicon and the 4, 4 '-bismaleimide diphenylmethane are crosslinked with the epoxy resin, so that the heat resistance of the epoxy resin is improved, and the toughening effect on the epoxy resin is achieved.

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 relates to a special single-coating type heat vulcanization adhesive for bonding butyl rubber and metal and a preparation method thereof, and the special single-coating type heat vulcanization adhesive comprises liquid rubber, a vulcanizing agent, diphenylmethane-4, 4 '-diisocyanate MDI, epoxy modified phenolic resin, pigment carbon black, fumed silica, titanium dioxide, zinc oxide and an organic solvent. According to the single-coating type heat vulcanization adhesive, the bonding strength of butyl rubber and metal is greatly improved, the bonding performance is excellent, the bonding strength is obviously higher than that of a heat vulcanization adhesive of metal and an elastomer material, the high temperature resistance and salt resistance of a bonding interface are excellent, the peel strength is still kept to be 11 kN / m or above in a salt spray experiment and a boiling water experiment, and the service life of the adhesive is prolonged. The environment resistance such as wear resistance, corrosion resistance and heat resistance is excellent.

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 present invention relates to a method for preparing a diphenylmethane-based diisocyanate and polyisocyanate. The method comprises the following steps: S1. performing a phosgenation reaction on a diphenylmethane-based diamine and polyamine and phosgene in a solvent to obtain a first mixed solution; S2. performing phosgene removal treatment on the first mixed solution to obtain a second mixed solution; S3. performing stripping treatment on the second mixed solution by using HCl gas to obtain a third mixed solution; and S4. performing solvent removal treatment on the third mixed solution to obtain a crude diphenylmethane-based diisocyanate and polyisocyanate product. In the method for preparing a diphenylmethane-based diisocyanate and polyisocyanate as provided by an embodiment of the present invention, by optimizing process parameters of the stripping treatment step, a diphenylmethane-based diisocyanate and polyisocyanate product having a light color can be prepared.

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.

The invention relates to the technical field of polyurethane, in particular to a solvent-free PU resin production process which comprises the following steps: S1, introducing a PSSA homopolymer, polyester polyol, polyether polyol, diphenylmethane, castor oil, organic bismuth, an antioxidant 1010, glycerol and gamma-aminopropyltriethoxysilane into a mixing kettle, and uniformly stirring to obtain a component A; s2, a PAI precursor, dicyclohexylcarbodiimide, toluene diisocynate and diisocyanate are introduced into the mixing kettle and stirred to be uniform, and a component B is obtained; and S3, introducing the component A and the component B into a reaction kettle, heating the reaction system, and stirring to obtain the paint. The solvent-free PU resin prepared by the invention has good mechanical strength and thermal stability, and also has certain fluidity.

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.

The invention provides a method for reducing the content of hydrolyzed chlorine in isocyanate, and the isocyanate is prepared from diphenylmethane series diamine and polyamine through phosgenation reaction. The phosgenation reaction is carried out by adopting diamine and polyamine of diphenylmethane series, wherein the mass content of N-(aminobenzyl) aniline impurities in the diamine and polyamine is 0.1-1000ppm, so that the content of hydrolyzed chlorine in the prepared isocyanate can be reduced.

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 discloses a high-molecular compound and a preparation method thereof, and relates to the technical field of high-molecular materials. The structural formula of the high-molecular compound is as follows: A1-A2-A3-A2 '-A1', the group A1 and the group A1 'are selected from groups with at least two ester groups, the group A2 and the group A2' are selected from groups with polyether groups and diphenylmethane groups, and the group A3 is selected from groups with at least two amide groups and at least two aryloxy groups. The high-molecular compound provided by the invention has high bonding strength, high light transmittance and excellent ultraviolet aging resistance.

The present application relates to a method for preparing diphenylmethane-based diamines and polyamines. By controlling the initial dispersion coefficient ω of the feeding of a raw material, i.e., an aqueous formaldehyde solution, the conversion rate of aniline is enabled to reach 70-99% of the ultimate conversion rate while diphenylmethane-based diamines and polyamines with the same quality are produced and prepared, thereby greatly reducing energy consumption during the recovery of unreacted aniline, and improving the production efficiency of a device. Moreover, the production process is stable, the content of N-methyl impurities in the prepared diphenylmethane-based diamines and polyamines is less than or equal to 0.25%, the distribution of MDAs having different rings meets the downstream production requirement, and there is no obvious blockage caused by macromolecular polymers during a reaction process.

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 invention provides an epoxy resin composition and application thereof. The epoxy resin composition comprises the following components in parts by weight: (a) 12-20 parts of epoxy resin; (b) 5-15 parts of an amine curing agent; (c) 0.05 to 3 parts of an antioxidant; (d) 50-75 parts of filler, wherein the amine curing agent is a composition of a diphenylmethane type amine compound and a sulfur-containing benzene ring type amine compound. After being cured, the epoxy resin composition disclosed by the invention has an improvement effect on cracking of a bump corner (Bmu m p corner) material.

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.