481 results about "Maleic acid" patented technology

The application discloses a polypropylene woven bag and a preparation method thereof. The polypropylene woven bag is woven by a woven material, and the woven material comprises the following components in parts by weight: polypropylene 90-110 parts, alumina whisker 8-12 parts, carbon nanotube with surface modified polydopamine 0.5-1 part, calcium stearate lubricant 0.5-1 part, ethylene-butyl acrylate-maleic anhydride terpolymer compatibility agent 5-10 parts, and antioxidant 0.3-0.6 part. The preparation method comprises the following steps: adding the components of the woven material into a high-speed mixer, and mixing to obtain a mixture; feeding the mixture into an extruder, and performing melting extrusion, cooling, stretching and setting to prepare polypropylene flat filaments; cross-weaving the polypropylene flat filaments into woven cloth, performing pattern printing on the surface of the woven cloth, and then sequentially performing cutting, sewing or bonding to seal the bottom, so that the polypropylene woven bag is prepared. The polypropylene woven bag obtained by the method has excellent wear resistance and good toughness.

The application relates to a high-damping and low-creep composite foaming material for gymnastics mats and a preparation process thereof, and relates to the field of polymer materials and preparation thereof. The preparation raw materials comprise the following components in mass fractions: ethylene-octene copolymer 60-70 parts, thermoplastic vulcanized rubber 15-25 parts, nano reinforcing filler 4-8 parts, maleic anhydride grafted ethylene-octene copolymer 5-9 parts, composite foaming agent 2-4 parts, crosslinking agent 1-2 parts, and antioxidant 1-1.5 parts. The preparation process comprises the following steps: melting and blending ethylene-octene copolymer, thermoplastic vulcanized rubber and maleic anhydride grafted ethylene-octene copolymer, adding nano reinforcing filler, mixing and kneading, then adding crosslinking agent, composite foaming agent and antioxidant, mixing and kneading, discharging and obtaining a sheet, crosslinking and foaming the sheet, releasing pressure after pressure maintaining, cooling and opening the mold, and obtaining the high-damping and low-creep composite foaming material for gymnastics mats. The application has the effects of improving the material collapse resistance, buffering performance and comfort performance.

This invention relates to the field of waterproof membrane technology, specifically to a TPO thermoplastic polyolefin polymer composite material. This material is composed of multiple components, including an interface-controlled masterbatch. Its core lies in the process of sequentially hydroxylating, treating with vinyltrimethoxysilane, hydrolyzing and condensing tetraethyl orthosilicate, and treating with octadecyltrimethoxysilane to obtain a surface-functionalized filler, which is then combined with maleic anhydride-grafted polypropylene to form the interface-controlled masterbatch. This design significantly improves the interfacial bonding between the filler and the polymer matrix, enabling the material to maintain excellent mechanical properties, dimensional stability, and low-temperature flexibility even after artificial climate aging, and effectively ensuring the long-term durability and reliability of welded joint areas.

The present application belongs to the technical field of glass fiber sizing agent, and particularly relates to an anti-creep glass fiber sizing agent and a preparation method thereof. The anti-creep glass fiber sizing agent comprises effective components and water, and the solid content of the anti-creep glass fiber sizing agent is 3-12%. The effective components comprise the following components according to weight percentage: maleic anhydride modified long-chain branched polyolefin wax 65.5-86.9 wt.%, coupling agent 5-10 wt.%, nucleating agent 1-8 wt.%, physical cross-linking component 5-12 wt.%, initiator 0.1-0.5 wt.%, and surfactant 2-4 wt.%. The present application can effectively solve the problem of insufficient anti-creep ability of the glass fiber reinforced polypropylene material in the prior art, and at the same time, the material has good mechanical properties and fatigue resistance, which plays an important role in improving the long-term dimensional stability of the polypropylene material.

This invention discloses an environmentally friendly, green, halogen-free flame-retardant cable and its preparation method, relating to the field of cable technology. The cable includes a tin-plated copper conductor at its center. An inner shielding layer, an insulation layer, and an outer shielding layer are extruded onto the conductor using a three-layer co-extrusion process to form an insulated core. The insulated core is then wrapped with an oxygen-free soft copper strip as a metallic shielding layer, followed by a semi-conductive water-resistant tape pad, then longitudinally wrapped with an aluminum-plastic composite tape and extruded with polyethylene. A waterproof layer is wrapped with a double-layer high-strength corrosion-resistant alloy tape as an armor layer. The outermost layer of the cable is extruded with a flame-retardant outer sheath. This sheath uses polyethylene as a base material, adding maleic anhydride-modified oleic acid and peroxide, and incorporating zinc oxide and magnesium oxide to form an ion network structure, while also incorporating flame-retardant fillers. This invention exhibits good tensile strength, electrical insulation performance, compressive and tensile strength, and bending performance, while also possessing excellent elongation at break, low-temperature crack resistance, and halogen-free flame-retardant characteristics.

This invention discloses a flame-retardant rubber and its preparation method. The flame-retardant rubber, by weight, comprises: 45-65 parts of ethylene-vinyl acetate copolymer; 12-20 parts of ethylene propylene diene monomer (EPDM) rubber; 3-6 parts of maleic anhydride-grafted ethylene-vinyl acetate copolymer; 8-12 parts of phosphorus-modified nanocellulose; 2-5 parts of submicron zinc borate; 2-4 parts of melamine polyphosphate; 0.5-2.5 parts of graphene; 1-2.5 parts of phosphorus-containing flame-retardant plasticizer; and 1-4 parts of multifunctional acrylate crosslinking agent. This application replaces traditional melamine with melamine polyphosphate (MPP). MPP has higher thermal stability, its decomposition temperature matches the char formation window of P-NC more closely, and it has its own phosphorus source, enabling a complementary and continuous phosphoric acid supply with P-NC on both the time and temperature axes, thus solving the problem of insufficient phosphorus catalysis after reducing the amount of P-NC alone.

This invention discloses a method for preparing impact-resistant and cold-resistant polyvinyl chloride (PVC) conduit, belonging to the field of PVC material technology. In this invention, butyl rubber is complexed with dioctyl sebacate and active silica under the initiation of tert-butyl hydrogen peroxide. This complex acts as a flexible dispersed phase in the PVC matrix, effectively absorbing and dissipating impact energy and lowering the glass transition temperature of the material. This allows the conduit to maintain excellent toughness and crack resistance even at low temperatures. Furthermore, it works synergistically with impact modifiers in the system. Ethylene-vinyl acetate copolymer provides elastomer toughening, while maleic anhydride-styrene graft copolymer acts as a highly efficient compatibilizer and interfacial reinforcing agent. The compounded structure forms a toughening network, achieving toughening from molecular chain segment movement to microstructure, thus improving impact strength. Subsequent addition of reinforcing fibers of the same specification further enhances the strength of the conduit. Overall, this results in a PVC conduit with excellent strength, impact and cold resistance, and thermal properties.

This invention discloses a low-temperature resistant plastic bucket and its preparation method, belonging to the field of plastic bucket technology. This invention utilizes the synergistic effect of maleic anhydride-grafted ethylene-octene copolymer, nano-aluminum nitride, and cold-resistant toughening agent, combined with gradient injection molding, gradient annealing, and low-temperature aging processes to eliminate internal stress in the product. This allows the product to possess excellent tensile strength, flexural strength, and drop resistance reliability at -10℃. Under full load, the drop height can reach 1.2m without cracking or leakage. The synergistic effect of each component achieves a balance between low-temperature toughness and structural strength, significantly improving the stability and service life of the plastic bucket under low-temperature conditions.

This invention discloses an anaerobic biodegradable masterbatch for cast film of sanitary materials, characterized in that its main components, by mass percentage, include: 0.5-3% cypermethrin, 3-6% copper sulfate, 0.1-0.5% metal inorganic salt coating agent, 1-4% ammonium molybdate, 5-10% PLA, 5-10% nano starch, 1-5% carbamide, 7-12% fumed silica, and the balance being a biodegradable resin carrier. The preparation method includes dispersion treatment, centering treatment, structuring treatment, carrier implantation, and plasticizing granulation. The invention also discloses an anaerobic biodegradable cast film for sanitary materials, comprising the following components by mass percentage: 83.4%-97.13% PE-based cast film substrate for sanitary materials, 1-5% PE wax, 1-7.5% degradation masterbatch, 0.15-0.3% dispersant, 0.02-0.2% antioxidant, 0.2-0.6% white oil, 0.5-3% PE grafted maleic anhydride, and 0.2-2% stabilizer. The manufacturing method includes: material preparation, calcium carbonate pretreatment, melting, filtration, and casting. This invention achieves complete anaerobic biodegradation of PE cast leak-proof and breathable films, and also has antibacterial properties during normal use, making it suitable as a breathable film and base film for disposable sanitary materials.

The present application relates to the technical field of high polymer material modification, and particularly relates to a kind of heat-reversible crosslinking polyethylene material based on Diels-Alder synthesis and a preparation method thereof.The preparation method comprises: maleic anhydride polyethylene is melt grafted with excess furan methylamine, then is treated by high temperature and high pressure dehydration ring closure to form stable furan functionalized polyethylene; then melt blend with bismaleimide, and by low temperature long time annealing treatment, to promote Diels-Alder reaction to proceed fully, so as to build a perfect heat-reversible crosslinking network.The present application has the beneficial effects that the obtained heat-reversible crosslinking polyethylene material has excellent temperature mechanical strength, solvent resistance and clear heat-reversible characteristics, and can be uncrosslinked at higher than 150 DEG C to realize melt reprocessing, and the network is reconstructed after cooling, and the strength retention rate is still higher after two times of recycling.The present application solves the problem of non-recyclable traditional crosslinking polyethylene, and is particularly suitable for recyclable products such as packaging and pipe.

This invention discloses a PP-based battery cell lead terminal material containing modified insulating and thermally conductive filler and its preparation method, relating to the field of polymer composite materials technology. The material comprises polypropylene, modified thermally conductive and insulating filler, thermal stabilizer, plasticizer, antioxidant, and lubricant. The modified thermally conductive and insulating filler consists of a point-sheet-wire synergistic thermally conductive framework composed of spherical α-alumina, hydroxylated hexagonal boron nitride nanosheets, and silicon nitride whiskers, sequentially forming a polydopamine anchoring layer, a magnesium-aluminum layered double hydroxide insulating locking layer, a polyphosphazene-siloxane-POSS composite shell, and a maleic anhydride-grafted polypropylene wax compatible coating layer. The resulting material possesses thermal conductivity, insulation, flame retardancy, heat resistance, mechanical stability, and processing performance, making it suitable for battery cell lead terminals and their surrounding insulating and thermally conductive structural components.

This invention discloses an organocobalt salt for improving the tensile strength of rubber and its preparation method, belonging to the field of rubber technology. The organocobalt salt for improving the tensile strength of rubber comprises, by mass parts, 140-210 parts of organosilicon vegetable fatty acid, 20-30 parts of solvent, 20-30 parts of cobalt hydroxide, and 10-16 parts of propionic acid. The organosilicon vegetable fatty acid is obtained by reacting rosin with organosilicon maleimide. The organosilicon maleimide is obtained by reacting maleic anhydride with a silicon-containing long-chain fatty amine. The silicon-containing long-chain fatty amine is obtained by reacting methyldiethoxysilane with an unsaturated long-chain fatty amine. The organocobalt salt obtained by this invention has a good effect on promoting the adhesion between metal and rubber while effectively improving the tensile strength of rubber.

This invention relates to the field of polymer materials technology, specifically to a modified sealing material based on polyphenylene sulfide (PPS) and its preparation method. This invention overcomes the problems of poor mechanical properties and poor thermal stability of existing sealing materials. In this application, PPS resin, nano-hexagonal boron nitride, calcium pimecronate, and a composite antioxidant are mixed to obtain a premix. This premix, PPS-grafted maleic anhydride, modified silica fume, and modified glass fiber are added stepwise through a twin-screw extruder, followed by extrusion granulation. Finally, variable mold temperature injection molding is used, with the mold temperature rising and then rapidly cooled during the filling stage to obtain the modified sealing material. This invention constructs a microscopic synergistic reinforcing network through a flexible polydopamine layer and a rigid inorganic phase, supplemented by rapid heating and cooling injection molding to eliminate residual internal stress and induce uniform and rapid crystallization of PPS, significantly improving the mechanical strength, fatigue life, and thermal stability of the molded part.

This invention provides an antibacterial and antifungal TPE material, belonging to the field of thermoplastic elastomer technology. The antibacterial and antifungal TPE material of this invention comprises the following components: SEBS, PP, a plasticizer, modified nano-zinc oxide, N-n-butyl-1,2-benzisothiazolin-3-one, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, an antioxidant, and zinc stearate; wherein the modified nano-zinc oxide is obtained by melt blending nano-zinc oxide with maleic anhydride-grafted SEBS, the mass ratio of the modified nano-zinc oxide to the maleic anhydride-grafted SEBS is (0.6-1.7):1, and the particle size of the nano-zinc oxide is 20-50 nm; the free acid content of the zinc stearate is 0.3%-0.5%. The antibacterial and antifungal TPE material of this invention possesses good antibacterial properties, antifungal properties, and tensile strength.

The application discloses a dimethyl maleate hydrogenation catalyst and a preparation method and application thereof. The catalyst comprises CuO, Al2O3 and Mn oxide; the specific surface area of the catalyst is 40-70 m 2 / g; the catalyst is subjected to H2-N2O titration test, and the dispersion degree of metal Cu is 42-70%. The catalyst is used for hydrogenation of dimethyl maleate to prepare 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran in combination, and has high conversion rate and target product selectivity.

This invention discloses a polyolefin composite material, its preparation method, and its application. The polyolefin composite material comprises the following components by weight: 88-112 parts polyolefin resin; 0.5-4 parts organic pigment yellow; 0.1-1.5 parts phthalocyanine green; and 1-15 parts dispersing agent. The dispersing agent comprises polar-group grafted olefin polymers and / or aromatic cyclic olefin copolymers. The polar groups in the polar-group grafted olefin polymers include one or more of the following: phosphate ester groups, phosphate groups, sulfonic acid groups, sulfonate groups, carboxylic acid groups, carboxylate groups, amino groups, quaternary ammonium salt groups, amide groups, acrylic acid groups, or maleic anhydride groups. This invention, by adding specific dispersing agents to a high-chroma polyolefin system, obtains a polyolefin composite material with high chroma and good precipitation performance.

This invention relates to the field of coating preparation technology and discloses a heat-insulating coating comprising: 15-35 parts of rosin-based derivative, 10-25 parts of auxiliary heat-insulating filler, 8-18 parts of film-forming agent, 1-5 parts of dispersant, 0.5-3 parts of wetting agent, 0.3-2 parts of defoamer, 0.2-2 parts of thickener, 1-4 parts of film-forming aid, and 20-45 parts of deionized water. This invention improves the compatibility of the auxiliary heat-insulating filler through rosin-based maleic anhydride-aminosilane derivative, and forms a three-dimensional cross-linked network through the hydrolysis and condensation of aminosilane, reducing heat loss channels and achieving synergistic heat insulation. The modified derivative has a heat resistance temperature of over 250℃, and the siloxane structure delays aging, ensuring long-term heat insulation performance, thus solving the problems of poor compatibility, insufficient heat resistance, and easy attenuation of heat insulation in existing coatings.

A method for forming an insulating film having through holes, the method comprising the steps of: coating a photosensitive resin composition onto a substrate and drying it to form a photosensitive layer; and exposing and developing the photosensitive layer to form an insulating film having through holes, the insulating film having a thickness of 15 μm or more, wherein the photosensitive resin composition contains maleimide resin, (meth)acrylic acid monomers and a photopolymerization initiator, the maleimide resin being a reactant of tetracarboxylic acid dianhydride (a1), amine (a2) and maleic anhydride (a3), the amine (a2) comprising dimer diamine, and the (meth)acrylic acid monomer comprising a difunctional (meth)acrylic acid monomer.

This application relates to the field of ceramic precursor materials technology, and discloses a high-ceramic-yield liquid zirconium carbide precursor and its preparation method. The high-ceramic-yield liquid zirconium carbide precursor is made from raw materials comprising the following parts by weight: zirconium n-butoxide: 100 parts; allyl acetoacetate: 74-82 parts; deionized water: 2.3-3.8 parts; furfuryl alcohol-maleic anhydride adduct modifier: 48-60 parts; wherein the furfuryl alcohol-maleic anhydride adduct modifier is the Diels-Alder reaction product of furfuryl alcohol and maleic anhydride. This invention introduces a Diels-Alder adduct of furfuryl alcohol and maleic anhydride to construct a thermally latent system. At room temperature, the adduct maintains a cyclic inert structure, giving the precursor low viscosity and long-term storage stability. At high temperatures, crosslinking is achieved by releasing active monomers through a reverse Diels-Alder reaction.

The application relates to a modified high-crystalline polypropylene composite material and a master batch preparation process thereof, and belongs to the technical field of polypropylene composite material modification, which comprises the following components in parts by weight: high-crystalline polypropylene resin 70-85 parts, composite nucleating agent 0.2-0.6 parts, organic-inorganic hybrid filler 8-15 parts, ethylene-octene copolymer grafted acrylate 4-9 parts, polyolefin elastomer grafted maleic anhydride 3-8 parts, composite antioxidant 0.4-0.9 parts and composite lubricant 0.3-0.6 parts. The new alpha nucleating agent compound system and the organic-inorganic hybrid filler are used in cooperation, the crystallinity and low-temperature impact resistance of the polypropylene are significantly improved, and the segmented pre-dispersion-melt blending process is used for master batch preparation, so that the components are uniformly dispersed, and the master batch quality stability is improved.

This invention provides an antistatic pipe and its preparation method, comprising an inner layer, a middle layer, and an outer layer arranged sequentially from the inside out. The middle layer is a porous thin-walled steel pipe, and both the inner and outer layers are made of composite materials. By weight, the composite material comprises the following raw materials: 55-65 parts heat-resistant polyethylene, 6-10 parts high-density polyethylene, 5-15 parts ethylene-ethyl acrylate copolymer, 6-10 parts sulfonated polyolefin, 2-6 parts titanate-modified vermiculite powder, 3-7 parts phosphorus-nitrogen composite flame retardant, 2-4 parts nano-indium tin oxide, 1-1.5 parts zinc stearate, 0.5-0.7 parts antioxidant, and 1.5-2.5 parts maleic anhydride-grafted polyethylene. The synergistic effect of the multiple components in this invention enables the prepared antistatic pipe to achieve breakthroughs in antistatic, mechanical, and flame-retardant properties, making it suitable for high-risk environments.

This invention discloses a flame-retardant nylon-SPS composition, comprising, by weight, the following components: 50-76 parts nylon resin; 10-30 parts syndiotactic polystyrene; 4-6 parts red phosphorus; 2-4 parts interface binder; and 1-3 parts metal oxide. The interface binder is selected from at least one of maleic anhydride-grafted SEBS and GMA-ethylene-acrylate. This invention, by adding a specific type of interface binder to the red phosphorus flame-retardant nylon resin-syndiotactic polystyrene resin matrix, can significantly improve the flame-retardant properties and toughness, and significantly improve the corrosion resistance of the composition.

This invention discloses a low-smoke halogen-free flame-retardant power cable, belonging to the technical field of flame-retardant power cables. The cable comprises a core, a wrapping layer, and a sheath layer. The sheath layer is made of the following raw materials in parts by weight: 70-80 parts thermoplastic polyurethane elastomer, 20-30 parts maleic anhydride-grafted POE, 15-20 parts inorganic flame retardant, 8-16 parts halogen-free flame retardant, 1-2 parts antioxidant, 0.5-1 part ultraviolet absorber, and 2-3 parts lubricant. The halogen-free flame retardant molecules contain phosphorus, silicon, nitrogen, Schiff bases, and oxazine ring structures, achieving a dual flame-retardant mechanism in both the condensed and gaseous phases through synergistic effects, significantly improving flame-retardant performance and inhibiting dripping. The cable of this invention has the advantages of low smoke, halogen-free, highly efficient flame retardancy, and good heat resistance, making it particularly suitable for power transmission scenarios with high safety and durability requirements, such as charging piles.

The present invention relates to a polymerizable solution for impregnating wood, a method for impregnating wood with said solution and impregnated wood impregnated with said solution. The polymerizable solution comprises: - furfuryl alcohol in the range from 25 to 75 weight% based on the total weight of the solution, - carboxylic acid in the range from 0.01 to 0.15 mol / kg based on the total weight of the solution, - maleic anhydride in the range from 0.25 to 4 weight% based on the total weight of the solution, - condensate from a previous curing process of wood in the range from 24 to 74 weight% based on the total weight of the solution, and - an amount of water-soluble alkali salt to obtain a pH in the range from 3 to 5 at the time point when the solution is made.

The application discloses a preparation method of a trans-7H-pyrrolo[2,3-d]pyrimidine compound, and the full name of the trans-7H-pyrrolo[2,3-d]pyrimidine compound is trans-N-methyl-4-(methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)cyclohexylmethanesulfonamide maleate, which is prepared from trans-4-[(tert-butoxycarbonyl)amino]cyclohexane carboxylic acid and 4-chloro-7H-pyrrolo[2,3-d]pyrimidine as starting materials through reduction, chlorination, substitution, oxidation, methylation, condensation and salt formation reactions. The preparation method has the advantages of few reaction steps, simple operation, low production cost, high production efficiency, high yield, high product purity and suitability for scale-up production.

The application provides a g-C3N4 modified PC and a preparation method and application thereof, the modified PC comprises the following components in mass fraction: base PC resin 96-98%, flame retardant 0.05-0.2%, toughening agent 0.1-1.5%, antioxidant 0.05-0.15%, lubricant 0.1-0.5%, maleic anhydride grafted g-C3N4 nano material 0.01-1%, and toner 0.5-1%. The modified PC has excellent antibacterial and antifouling capacity, can effectively solve the appearance problems of existing PC materials, such as easy fouling, poor wear resistance and the like in electronic and electrical products and daily packaging material products, the toughness and strength of the material are improved, and in addition, the modified PC material has certain light stability.

(Solution) Provides a gel-like composition comprising a vinyl chloride-based resin and a plasticizer, which exhibits a gel state at 20°C. The plasticizer is at least one selected from the group consisting of isophthalic acid esters, terephthalic acid esters, fumaric acid esters, acetylicinoleic acid esters, citric acid esters, acetyl citrate esters, adipic acid esters selected from di-2-ethylhexyl adipic acid (DOA) and diisononyl adipic acid (DINA), maleic acid esters and their derivatives, and salts thereof. Provides an electronic device comprising a first electrode and a second electrode, and a polymer layer disposed between the first electrode and the second electrode and comprising the gel-like composition.