227 results about "Phthalic anhydride" patented technology

The invention discloses lighting resin as well as a preparation method and application thereof, and belongs to the technical field of lighting type unsaturated polyester resin. Comprising the following components: ethylene glycol, benzoic acid, phthalic anhydride, maleic anhydride, an antioxidant, a defoaming agent, a surfactant, a stabilizer, styrene, a solvent, a first polymerization inhibitor, a second polymerization inhibitor and a third polymerization inhibitor. The alcohol-acid ratio is (1.03-1.13): 1; the molar ratio of unsaturated acid to saturated acid is (2.5-3.5): 1; the mass ratio of benzoic acid to the surfactant is (26.8-44): 1; the preparation method comprises the following steps: 1) reacting ethylene glycol, maleic anhydride, phthalic anhydride, benzoic acid, an antioxidant and a first polymerization inhibitor; the preparation method comprises the following steps of (1) adding a first polymerization inhibitor, (2) heating and preserving heat after the reaction is completed, and (3) cooling, adding a second polymerization inhibitor, cooling, adding a third polymerization inhibitor, a cross-linking agent, a surfactant and a defoaming agent, and adding a solvent to obtain the daylighting resin.According to the preparation method, the surfactant and benzoic acid have a synergistic effect, so that the compatibility of polyester and the cross-linking agent is improved.

The invention relates to rosin modified resin and a preparation process thereof and low-odor printing ink, the rosin modified resin is prepared from maleic anhydride, sulfonate alkyd resin, rosin and a metal organic framework, and the sulfonate alkyd resin is prepared from neopentyl glycol, dibutyltin dilaurate, m-phthalic acid-5-sodium sulfonate, phthalic anhydride and pentaerythritol. The printing ink has the effect of improving the strength and smell of the printing ink.

The invention discloses a two-component epoxy pouring sealant as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The bi-component epoxy pouring sealant comprises a component A and a component B. The component A comprises the following raw materials: 60-100 parts of modified epoxy resin; 5-25 parts of a reactive diluent; 1 to 10 parts of nano silicon dioxide; the component B comprises the following raw materials in parts by mass: 50-60 parts of an alicyclic amine curing agent; 20-30 parts of a polyether amine curing agent; 10 to 15 parts of methyl tetrahydrophthalic anhydride; 3-5 parts of a silane modifier; 0.1 to 0.5 part of a defoaming agent; the modified epoxy resin is prepared by carrying out esterification reaction on bisphenol A type epoxy resin and long-chain fatty acid for modification and then carrying out graft modification with polypropylene glycol diglycidyl ether. In addition, the invention also provides a preparation method of the two-component epoxy pouring sealant. The epoxy pouring sealant provided by the invention has excellent bonding performance on non-polar plastics such as PP / PE and the like.

The invention relates to a high-heat-resistance and high-insulation two-component epoxy resin adhesive and application thereof, and belongs to the technical field of epoxy resin. The technical problem to be solved by the invention is to provide the high-heat-resistance and high-insulation two-component epoxy resin adhesive. The adhesive comprises a component A and a component B. The component A comprises bisphenol A epoxy resin, novolac epoxy resin, silicon carbide whiskers, potassium titanate fibers, boron phenolic resin and modified nano boron nitride. The component B is prepared from methylhexahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, 2-phenylimidazole, modified aluminum oxide, polyimide micro powder and modified wollastonite. Through synergism of multiple materials, balance of heat conduction, insulation, mechanical strength and thermal stability of the adhesive is realized. Under high-frequency pulse voltage, the adhesive is long in electrical aging life. A gradient curing process is adopted for curing, complete reaction in each stage is guaranteed, and internal stress is reduced. The process fault tolerance is high, the environment compatibility is high, the cost is low, and the curing time is short.

The invention relates to the technical field of sound insulation materials, in particular to flame-retardant epoxy resin composite diatomite sound insulation cotton and a preparation method thereof. The flame-retardant epoxy resin composite diatomite sound insulation cotton is prepared from epoxy resin, diatomite, a composite flame retardant, a coupling agent, a curing agent, a diluent, a foaming agent and a charring agent. The composite flame retardant at least comprises ammonium polyphosphate and melamine; the coupling agent is a silane coupling agent or a titanate coupling agent; the curing agent is methyl tetrahydrophthalic anhydride; the diluent is n-butyl glycidyl ether; the foaming agent is azodicarbonamide; the charring agent is pentaerythritol. By optimizing the diatomite modification process and combining physical dispersion and chemical modification means, the compatibility of the diatomite and the epoxy resin is greatly improved, the pain point of filler agglomeration in the traditional process is thoroughly solved, the porous sound insulation potential of the diatomite is fully released, and the sound absorption and sound insulation performance of the material is qualitatively improved.

The invention relates to low-viscosity high-strength two-component epoxy winding resin and a preparation method and application thereof, the resin comprises a component A and a component B, and the mass ratio of the component A to the component B is 100: (80-110); the component A consists of the following raw materials in percentage by mass: 70-85% of modified epoxy resin, 14-20% of a functional reactive diluent and 1-10% of an impregnating compound; the modified epoxy resin is formed by compounding bisphenol A epoxy resin and polyether modified epoxy resin, and the functional active diluent is formed by compounding 1, 6-hexanediol diglycidyl ether and phenyl glycidyl ether; the component B is prepared from the following raw materials in percentage by mass: 85-96% of a composite anhydride curing agent, 2.5-10% of a high-efficiency accelerant and 1.5-5% of a defoaming agent; the composite anhydride curing agent is compounded by methyl tetrahydrophthalic anhydride and succinic anhydride, the efficient accelerant is compounded by imidazole and phosphine, and the defoaming agent is an organic silicon defoaming agent.

The invention discloses ternary copolymerized low-dielectric polyimide based on fluorinated cross-linked side groups as well as a preparation method and application of the ternary copolymerized low-dielectric polyimide. According to the preparation method, two diamine monomers with a fluorine-containing group and a large-volume side chain group, namely fluorine-containing triarylmethane diamine and tetrafluorostyrene side group-containing diamine, are polymerized with 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride to obtain the ternary copolymerized polyimide (Co-FPAPI-x), and the preparation method is efficient, simple, convenient and low in cost. The tetrafluorostyrene group in the ternary copolymerized polyimide structure can form a hydrophobic cross-linked network through a thermal cross-linking reaction. Besides, by changing the proportion and thermal crosslinking degree of the two diamine monomers, the accumulation state, polarization behavior and the like of a molecular chain can be adjusted, so that the performance of the material is improved.

The invention discloses a polylactic acid composite material for a packaging bottle and a preparation method of the polylactic acid composite material. The polylactic acid composite material for the packaging bottle is prepared from the following components in parts by mass: 50 to 70 parts of polylactic acid, 10 to 30 parts of poly (epsilon-caprolactone), 10 to 30 parts of poly (propylene carbonate), 30 to 50 parts of functional master batch and 0.1 to 0.5 part of antioxidant, the functional master batch is prepared from a polylactic acid-modified nano silicon dioxide-poly (propylene carbonate) graft and a polylactic acid-modified nano silicon dioxide-poly (epsilon-caprolactone) graft; the modified nano silicon dioxide is 4-phenylethynyl phthalic anhydride modified nano silicon dioxide. The modified nano silicon dioxide is obtained by adopting an ultrasonic blending method, and different macromolecular substances are bonded through the modified nano silicon dioxide by utilizing an electron irradiation method to obtain a modified graft, so that the surface energy of particles can be reduced, the agglomeration among the particles can be reduced, and the dispersing performance of the nano silicon dioxide can be improved.

The invention discloses a polyimide-aluminum oxide composite film material and a preparation method thereof, the composite film material is composed of a polyimide layer and an aluminum oxide layer deposited and combined on the upper surface of the polyimide layer, and the thickness of the polyimide layer and the thickness of the aluminum oxide layer are both nanoscale; the composite film material is prepared by using atomic layer deposition equipment, and the preparation method comprises the following steps: firstly, depositing a nanoscale polyimide layer on a monocrystalline silicon piece carrier according to a set program by taking pyromellitic dianhydride and hexamethylenediamine as precursor raw materials; and depositing and combining a nanoscale aluminum oxide layer on the upper surface of the polyimide layer according to a set program by taking trimethylaluminum and distilled water as precursor raw materials. The prepared composite film material is different from a current composite film material prepared by blending polyimide and aluminum oxide and then carrying out film casting, the composite film material has a nano-scale polyimide layer with uniform thickness and a nano-scale aluminum oxide layer deposited and combined on the upper surface of the polyimide layer, and the composite film material has a good radiation refrigeration effect.

The invention discloses weather-resistant and medium-resistant alkyd resin varnish and a preparation method thereof. The varnish is prepared from the following raw materials: modified alkyd resin, a composite drier, zirconium iso-octoate with the purity of 12%, an anti-skinning agent, 200 # solvent oil and xylene. The modified alkyd resin is prepared from the following raw materials: soya oil acid, pentaerythritol, benzoic acid, pyrrolidine-2-one-1-acetic acid, dimethylbenzene and a 200 # solvent. According to the invention, pyrrolidine-2-ketone-1-acetic acid is used as a binary acid component to partially or completely replace traditional phthalic anhydride, so that the reaction efficiency of alkyd resin synthesis can be improved, and the problems of yellowing, pulverization and poor water resistance of traditional alkyd resin can be solved; according to the varnish prepared by the invention, on the basis of maintaining the inherent gloss, flexibility and constructability of alkyd resin, the key properties such as weather resistance, water resistance and acid resistance are improved; the whole preparation process of the varnish continues to use mature alkyd resin production equipment and flow, and has good economical efficiency and industrial popularization prospects.

The invention relates to the field of ceramic packaging materials, in particular to a packaging material for a high-voltage-resistant ceramic side wall and a preparation method of the packaging material. The packaging material is prepared from an epoxy-silica hybrid prepolymer, an aluminum oxide and silicon dioxide core-shell composite filler, methylhexahydrophthalic anhydride and 2-ethyl-4-methylimidazole, wherein the hybrid prepolymer is prepared by carrying out hydrolytic condensation on bisphenol A diglycidyl ether, hydroxyl-terminated PDMS (Polydimethylsiloxane) and 3-glycidoxypropyltrimethoxysilane; low viscosity and low volatile matter are realized; the core-shell filler takes aluminum oxide as a core and silicon dioxide as a shell, and a shell layer is grafted with epoxy silane so as to be chemically bonded with resin. And after curing, the power frequency short-time electrical strength of the packaging layer is greater than or equal to 20 kV / mm, the partial discharge initial voltage is greater than or equal to 3 kV, the volatile matter is less than or equal to 1.0 wt%, and the water content is less than or equal to 0.2 wt%.

The application provides a preparation method of an indobufen key intermediate. The method uses 2-(4-nitrophenyl) butyric acid and phthalic anhydride as raw materials, and obtains the target compound (I) through a one-pot method. The method has the advantages of simple operation, mild conditions, high reaction yield, reduced cost through mother liquor recycling and reuse, significantly reduced "three wastes" and environmental protection, and is suitable for large-scale industrial production.

The application discloses a brazing flux capable of enhancing the radiation resistance of aluminum alloy brazing joints, and a preparation method and application thereof. The brazing flux is composed of 5-18% of an organic mixture and the balance of an inorganic mixture. The organic mixture is composed of 7-15% of EP-12 epoxy resin, 8-16% of EP-16 epoxy resin, 5-8% of F-51A high-temperature-resistant flame-retardant thermosetting phenolic resin, 5-8% of F-52A high-temperature-resistant flame-retardant thermosetting phenolic resin, 5-8% of resorcinol, 5-8% of hydroquinone and the balance of phthalic anhydride. The inorganic mixture is composed of 40-55% of CsF, 20-30% of AlF3, 0.005-0.01% of GaF3 and the balance of Al(OH)3. The brazing flux matches Zn-Al filler metal, can make the aluminum alloy brazing joint have good radiation resistance, and can significantly improve the shearing strength of the brazing joint.

The present application belongs to the field of polymer materials, and particularly relates to a self-toughened epoxy resin with high temperature resistance and a preparation method thereof. The modifier is a multifunctional epoxy resin containing a polyetherimide structure. The modifier is dissolved and blended with a bisphenol A type epoxy resin. The curing agent comprises one or more of methyl nadic anhydride, methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, dodecenyl succinic anhydride and pyromellitic anhydride. The curing accelerator comprises one or more of dimethylaminomethylphenol, ortho-hydroxybenzyl dimethylamine, 2,4,6-tris(dimethylaminomethyl)phenol, triethylamine and triethanolamine. The multifunctional epoxy resin containing a polyetherimide structure not only has good solubility in the bisphenol A type epoxy resin, but also can participate in the curing reaction of the bisphenol A type epoxy resin, so that the toughness and temperature resistance of the bisphenol A type epoxy resin can be significantly improved.

The invention relates to a preparation method of a Pd-based catalyst and application of the Pd-based catalyst in catalytic synthesis of biphenyltetracarboxylic dianhydride. According to the method, an alkaline substance is added, and nickel oxide is modified and regulated through hydroxyl, so that the specific surface area of the Pd / NiO catalyst is increased, and the effect between Pd and NiO is enhanced; the obtained catalyst can promote coupling of halogenated phthalic anhydride, and the synthesis efficiency of biphenyl tetracarboxylic dianhydride is improved. The catalyst is simple in preparation process and excellent in performance and is applied to synthesis of biphenyltetracarboxylic dianhydride, and esterification and ester hydrolysis steps do not need to be added.

The application discloses a molecular sieve catalyst for synthesizing dianhydride from durene by gas phase oxidation, a preparation method of the molecular sieve catalyst and a method for synthesizing dianhydride, the molecular sieve catalyst comprises V, Al, P, O and Ti elements, and contains 0.1wt%-10wt% V2O5, 30wt%-60wt% Al2O3, 30wt%-50wt% P2O5 and 1wt%-20wt% TiO2 in terms of oxides; the structure of the molecular sieve is AFI structure, wherein the Ti element exists in the form of TiO2, and the TiO2 is in the form of anatase. The molecular sieve catalyst comprises V, Al, P, O and Ti elements. The catalyst is suitable for industrial production of dianhydride prepared from durene by gas phase oxidation, and has the characteristics of simple preparation process, high catalytic activity and high dianhydride yield.

This invention belongs to the field of stone adhesive technology, specifically relating to a transparent stone splicing adhesive and its preparation method. The adhesive comprises a resin component and a curing component. The resin component includes maleic anhydride, phthalic anhydride, diol, catalyst, polymerization inhibitor, and crosslinking monomers, etc., and the diol includes at least 1,2-propanediol. The curing component includes an accelerator composed of dimethylaniline and zinc adipate, and a benzoyl peroxide initiator. The adhesive of this invention is colorless and transparent after curing, exhibits excellent resistance to yellowing, is easy to apply, and after curing with fillers, possesses excellent shear strength, water shear strength, and impact resistance. It can be widely used in high-end stone splicing, repair, and craft bonding.

The invention discloses preparation and application of a double-sided aluminized polyimide film for ultralow-temperature multilayer vacuum insulation, and relates to the technical field of polyimide film preparation. The invention relates to an ultralow-temperature multilayer double-sided aluminized polyimide film for vacuum heat insulation, which consists of a polyimide base film and aluminized layers formed on two surfaces of the polyimide base film through a vacuum evaporation method, the polyimide base film is prepared from the following raw materials in parts by mass: 100 parts of pyromellitic dianhydride, 4, 4 '-diaminodiphenyl ether, 5-15 parts of a low-temperature-resistant modifier, 3-8 parts of nano silicon dioxide filler, 0.5-2 parts of a flatting agent, 0.5-1.5 parts of an anti-aging agent, 3-6 parts of a silane coupling agent and 5-15 parts of polyvinyl chloride. The anti-aging agent with a specific structure is adopted, the phenolic hydroxyl group and the benzotriazole structure have a synergistic effect, free radicals can be captured, ultraviolet rays can be absorbed, the compatibility with a polyimide matrix is good, precipitation at low temperature is avoided, the problems that a traditional anti-aging agent is poor in low-temperature dispersion and prone to failure are solved, and the service life of the film is prolonged.

The invention relates to a preparation method and application of a nucleating agent. The preparation method comprises the following steps: mixing solvent pure water, calcium hydroxide and fatty acid methyl ester sulfonate, and heating; dropwise adding hexahydrophthalic anhydride into the mixed solution, and after dropwise adding is completed, carrying out heat preservation reaction to obtain the calcium hexahydrophthalate. The product has excellent performance when used for thermoplastic resin such as polyolefin.

The application discloses a water-based polyurethane for nail polish and a preparation method thereof, and relates to the technical field of water-based polyurethane. The water-based polyurethane for nail polish comprises mixed polyols, polyisocyanate, functional monomers, a hydrophilic agent, a post-chain extender and deionized water, wherein the mixed polyols are a combination of polycaprolactone glycol, phthalic anhydride polyester polyol and polyether polyol, and the functional monomers comprise amino type furan monomers and amino type maleimide monomers. Through the technical scheme, the glossiness and surface hand feeling of the water-based polyurethane after film formation can be effectively improved, and the apparent quality and product value of the nail polish prepared from the water-based polyurethane are improved.

This invention discloses a class of quinalidine disperse yellow dyes with high sublimation fastness and their synthesis method, belonging to the field of disperse dye technology. This invention uses Disperse Yellow 54 as the parent core and introduces one of the following substituents at the 6-position of the quinalidine ring: ethyl, n-propyl, cyclopropyl, cyclobutyl, cyclopropylmethyl, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, cyclopropoxy, cyclobutoxy, cyclopropylmethoxy, 2-methoxyethoxy, fluorine, chlorine, bromine, cyano, or nitro. This invention uses 6-substituted-2-methyl-3-hydroxyquinoline-4-carboxylic acid and phthalic anhydride as raw materials, and synthesizes the target dye in one step via a high-temperature condensation reaction. Experimental results show that the sublimation fastness of the dye of this invention reaches grade 4-5 or 5, significantly improved compared to Disperse Yellow 54 (grade 2-3), while maintaining excellent resistance to rubbing, perspiration, and sunlight. This invention has a simple synthesis process, high yield, and high purity, possessing extremely high industrial production value and market application prospects.

The application discloses a kind of multi-section naphthalene selective oxidation preparation phthalic anhydride catalyst system and its preparation method and naphthalene oxidation preparation phthalic anhydride method.The catalyst system includes A section catalyst, B section catalyst, C section catalyst and D section catalyst, wherein, each single section catalyst includes active component and carrier, the active component includes main active component, titanium dioxide and catalytic component;With the total weight of catalyst active component in each single section catalyst 100wt% as standard, the amount of pore-forming material is 4-5wt% during the preparation of A section catalyst;The amount of pore-forming material is 2-3wt% during the preparation of B section catalyst;The amount of pore-forming material is 0.1-1wt% during the preparation of C section catalyst;Pore-forming material is not added during the preparation of D section catalyst.The application improves the utilization efficiency of catalyst bed whole by the method of setting catalyst in steps, and then improves raw material processing capacity, improves production efficiency.

The invention relates to the field of oilfield chemical industry. The invention relates to a temporary plugging agent, in particular to a temperature-resistant and compression-resistant temporary plugging agent and a preparation method and application thereof. The temperature-resistant and compression-resistant temporary plugging agent comprises the following raw material components in parts by weight: 60-80 parts of polyimide; 5-10 parts of calcium carbonate nanofibers of which the surfaces are assembled with amphiphilic block copolymers; 0.2 to 4 parts of an auxiliary agent; wherein the polyimide is prepared by taking biphenyl tetracarboxylic dianhydride, p-phenylenediamine and phenylacetylene phthalic anhydride as polymerization reaction raw materials; the amphiphilic block copolymer assembled on the surface of the calcium carbonate nanofiber is polystyrene-b-polyacrylic acid. The temperature-resistant and compression-resistant temporary plugging agent provided by the invention has excellent high temperature resistance, compression resistance and plugging capacity, can be quickly hydrolyzed and crushed after temporary plugging is finished, can realize quick plugging removal, and is suitable for a high-temperature and high-pressure mining environment with the formation temperature (use environment) of 281-295 DEG C and the formation pressure of more than or equal to 130 MPa.

The invention discloses a modified PBO fiber reinforced epoxy resin composite material as well as a preparation method and application thereof. The composite material comprises matrix resin and modified PBO fibers, wherein the matrix resin is prepared from the following components in parts by mass: 100 parts of epoxy resin, 75 to 85 parts of methylhexahydrophthalic anhydride and 0.3 to 0.8 part of 2, 4, 6-tri (dimethylaminomethyl) phenol; the modified PBO fibers account for 1-4% of the modified PBO fiber reinforced epoxy resin composite material by mass. The preparation method effectively solves the problems of strong surface inertia and poor interface adhesion with epoxy resin of the PBO fiber, obviously improves the interface shear strength, mechanical properties, thermal stability and thermal conductivity of the composite material through synergistic physical etching and chemical bonding, keeps high breakdown strength, and has the advantages of mild and controllable process, small fiber damage and low cost. The method is suitable for manufacturing the extra-high voltage insulation core rod.

This invention discloses a method for preparing high-performance wood wax oil, belonging to the field of coating technology. The raw materials used in this wood wax oil are soybean oleic acid, maleic anhydride, grafting catalyst, glycerol, phthalic anhydride, esterification catalyst, vanadium drier, zirconium drier, carnauba wax, and beeswax. Compared to wood wax oils based on tung oil and linseed oil, the wood wax oil of this invention uses soybean oleic acid as the main material, utilizing maleic anhydride to perform graft copolymerization at the α-position of the carbon-carbon double bond in soybean oleic acid, thereby increasing the iodine value of the resin system. Increased iodine value leads to increased crosslinking points, thus ensuring drying properties and improving the hardness, drying performance, and yellowing resistance of the wood wax oil; weather resistance is significantly improved, and drying time is accelerated; no heavy metal driers such as cobalt and manganese are added, making it environmentally friendly; the preparation process of the wood wax oil of this invention is simple and easy to operate, with low material costs.

The invention relates to the technical field of energy storage, and discloses a naphthalene-containing polyimide copolymer, a preparation method thereof and an electronic device. The naphthalene-containing polyimide copolymer has a structure shown in a formula (I), wherein the formula (I) is shown in the description; wherein R1 is independently selected from residues of naphthalene-containing dianhydride, and the naphthalene-containing dianhydride comprises at least one naphthalene ring connected with two anhydride groups; r2 is independently selected from residues of a diamine monomer, and the diamine monomer comprises at least one benzene ring; r3 is independently selected from residues of a dianhydride monomer comprising at least two phthalic anhydrides; the ratio range of x to y is (1: 99)-(30: 70). The naphthalene-containing polyimide copolymer provided by the invention has better stability at high temperature and has better dielectric properties such as high dielectric constant, low dielectric loss and high breakdown strength.

The application discloses raw material oil for naphthalene distillation device and a production process using the same as raw material, the raw material oil comprises dephenol naphthalene oil and naphthalene residue, the weight ratio of the dephenol naphthalene oil and the naphthalene residue is (90-105):1, the naphthalene content of the raw material oil is controlled to be 72-76%, the dephenol naphthalene oil is obtained by dephenolizing naphthalene oil collected from a side line of a distillation column of a tar distillation device, and the naphthalene residue is a by-product generated by a phthalic anhydride device; the production process using the raw material oil for naphthalene distillation device as raw material combines the naphthalene distillation device and the phthalic anhydride device, uses the raw material oil as raw material, and prepares high-quality industrial naphthalene by optimizing process parameters, so that the additional value of the naphthalene residue is improved, the raw material cost is reduced, and the comprehensive benefits are greatly improved.

The method comprises the following steps: by taking aminopropionitrile rectified high-boiling oil generated in a working section of preparing aminopropionitrile from acrylonitrile during production of VB1 as a raw material, carrying out reduced pressure rectification or in-situ catalytic cracking reduced pressure reaction rectification to obtain a distillate with the mass percentage content of dicyanoethylamine greater than 97% at the yield of 75% or more relative to the mass of the aminopropionitrile rectified high-boiling oil; dissolving the distillate by using an organic solvent, and carrying out catalytic chemical reduction or catalytic hydrogenation under an alkaline condition and in the presence of a catalyst to obtain a reduced material containing dipropylenetriamine, and centrifuging or filtering to separate out the catalyst and insoluble substances; the preparation method comprises the following steps of: adding an organic solvent into a reaction kettle, sequentially distilling to recover the organic solvent, rectifying under reduced pressure, collecting rectified fractions according to a relational expression t = 92.42 + 9.645 / (1.573-lgP) between a boiling point t (DEG C) of a material and a corresponding external pressure P (mmHg) to obtain dipropylenetriamine with the mass percentage content of more than 97%, reacting dipropylenetriamine with phthalic anhydride to generate a polyamide prepolymer, and reacting with epoxy chloropropane to obtain the dipropylenetriamine with the mass percentage content of more than 97%. The polyamide epoxy resin wet strength agent is obtained.

The invention belongs to the technical field of ortho-process phthalic anhydride catalyst preparation and filling, and discloses a six-section bed ortho-process phthalic anhydride catalyst and a filling method thereof.The catalyst is divided into six sections including R0, R1, R2, R3, R4 and R5, and the filling height of each section is R0 3 cm; r1 is 20 to 130 cm; r2 is 30 to 130 cm; r3 is 30 to 60 cm; r4 is 30 to 60 cm; r5 is 50 to 100 cm; and the total filling height is 260 to 370 cm. The contents of the main components in each section are as follows in percentage by weight: 3.0-20.0% of V2O5; the TiO2 accounts for 80.0%-97.0%, and the Sb2O3 accounts for 0.2%-5.0%; and 0.05 to 0.60 percent of Cs2CO3. By adopting the prepared catalyst and the filling method thereof, the load can reach 95 grams of phthalic acid / standard cubic meter of air, the yield of crude anhydride can reach 114.5 percent (100 percent by weight), and after the catalyst is used for three years, the content of phthalide in the crude anhydride can be less than or equal to 0.15 percent.

The application discloses a kind of based on elastomer class glass thermal interface material and preparation method thereof.The thermal interface material is prepared from raw materials including diglycidyl ether-terminated liquid polythioether prepolymer, methyl tetrahydrophthalic anhydride, ethylene glycol diglycidyl ether, catalyst and heat-conducting filler.The application realizes the high vertical orientation of heat-conducting filler by the process of hot-pressing and stack welding, and has very high thermal conductivity in the vertical direction.The R c of the thermal interface material is much lower than that of commercial thermal interface material using traditional silicon matrix, and has spontaneous contact behavior on the surface of substrate.