49 results about "Rubber toughening" patented technology

The invention discloses a low-temperature silver-coated copper conductive silver paste suitable for heterojunction solar cell nickel screen printing, which comprises the following components in percentage by mass: 10-70% of spherical silver-coated copper powder, 15-80% of submicron silver powder, 0.5-5% of nano silver powder, 1-6% of resin, 0.2-4% of assistant and 0.5-3% of solvent, wherein the resin comprises epoxy resin with the epoxy equivalent of 200 to 260 and rubber toughened epoxy resin with the weight-average molecular weight of 10000 to 20000. Wherein the epoxy resin with the epoxy equivalent of 200-260 provides ink passing performance, and nickel net narrow line width printing is guaranteed; the high-molecular-weight resin with the weight-average molecular weight of 10000-20000 is used as the thixotropic agent, so that the printing line type and the height-width ratio are ensured. The line width of a heterojunction battery prepared by matching the slurry with nickel net narrow line width printing can be as low as 18 microns, and the conversion efficiency of a battery piece is improved on the basis of greatly reducing the silver consumption of a single piece.

The invention relates to the technical field of new materials, and mainly relates to a double-component low-viscosity ultralow-temperature adhesive as well as a preparation method and a use method thereof. The double-component low-viscosity ultralow-temperature adhesive comprises a component A and a component B. The component A comprises the following components in percentage by mass: 20-40% of bisphenol A epoxy resin, 4-8% of aromatic epoxy resin, 6-10% of polyurethane modified epoxy resin, 1-2% of a rubber toughening agent, 5-20% of a diluent and the balance of an additive. And the component B comprises the following components in percentage by mass: 10-40% of a polyether amine curing agent, 10-40% of a fatty amine curing agent, 10-40% of an aromatic amine curing agent and 10-40% of a phenolic aldehyde amine curing agent. The adhesive provided by the invention has relatively strong compressive strength and excellent toughness, can keep good toughness in a low-temperature environment, is not easy to cause brittle rupture, can bear relatively large mechanical load, and is suitable for various industrial applications.

The invention relates to the technical field of composite material preparation, and discloses a vacuum infusion epoxy resin system which comprises the following components in parts by weight: 50-80 parts of epoxy resin, 10-30 parts of a curing agent, 1-5 parts of an accelerant, 5-15 parts of a flexibilizer, 10-20 parts of filler, 1-3 parts of a coupling agent, 5-10 parts of a diluent, 0.1-1 part of a defoaming agent, 0.5-2 parts of an antioxidant and 0.5-2 parts of a light stabilizer. Low-temperature rapid curing is achieved through the synergistic effect of the modified aromatic amine curing agent and the accelerant, the carboxyl-terminated nitrile rubber toughening agent and the filler form a synergistic toughening system to improve the mechanical property, and the hydrogenated bisphenol A epoxy resin is matched with the light stabilizer and the antioxidant to enhance the weather resistance and the high temperature resistance. The system can be used for preparing composite materials in the fields of wind power generation blades, ships, aerospace and the like, fiber reinforced materials are infiltrated by adopting a vacuum infusion forming process and then are cured and formed, and the problems that an existing resin system is long in curing time and insufficient in mechanical property and weather resistance are solved.

The invention provides edge folding glue as well as a preparation method and application thereof. The edge folding glue is prepared from the following raw materials: a toughening agent, epoxy resin, filler and an auxiliary agent, the toughening agent comprises an epoxy resin toughening agent and a rubber toughening agent. The flanging adhesive provided by the invention is prepared from the raw materials including the flexibilizer, the epoxy resin, the filler and the assistant, and the components are synergistically matched, especially the specific type of flexibilizer is introduced for compounding, so that the flanging adhesive has high viscosity at room temperature, has good adhesion and sealing performance after being baked and cured, and is suitable for being used in the field of packaging. The connecting piece is suitable for connecting parts such as automobile doors, engine covers, trunk lids, roof cross beams and inner and outer plates of automobiles.

The invention belongs to the technical field of capacitor materials, and particularly relates to a capacitor packaging material, a preparation method and application thereof and a capacitor packaging method. The capacitor packaging material comprises a resin component A, a curing component B and a bonding component C, the resin component A contains bisphenol A epoxy resin I, polyether polyol I and optional rubber toughening agent I and modified silicon dioxide I; the curing component B contains anhydride and optional rubber toughening agent II and modified silicon dioxide II; the bonding component C contains epoxy modified acrylic resin and bisphenol A epoxy resin II. The key point of the capacitor packaging material is that the specific coupling agent modified silicon dioxide, the rubber flexibilizer, the modified anhydride and the epoxy modified acrylic resin are introduced into the capacitor packaging material, and all the components cooperate with one another to play a synergistic role, so that the capacitor packaging material has a relatively low linear expansion coefficient and relatively high toughness; the cured packaging material is free of cracking, and the contact surface between the packaging material and the ceramic is well combined without gaps.

The invention provides poly (butyl acrylate), a preparation method and ASA (acrylonitrile styrene acrylate) resin. The preparation method of the poly (butyl acrylate) comprises the following steps: S1, mixing butyl acrylate, an RAFT reagent, an emulsifier, an optional electrolyte and water, and then adding an initiator and a reducing agent for reaction to obtain a PBA seed emulsion; s2, mixing butyl acrylate, an RAFT reagent, an emulsifier, an initiator and water to obtain a pre-emulsion; s3, a reducing agent and the pre-emulsion are added into the PBA seed emulsion for a reaction, and poly (butyl acrylate) is prepared. The prepared poly (butyl acrylate) is high in molecular weight, narrow in molecular weight distribution, high in branching degree and good in rubber toughening effect, the ultrahigh impact ASA resin can be prepared with a small amount of rubber powder, the impact strength is larger than 400 J / m, the weather resistance is extremely good, and dE is smaller than 15 after an ultraviolet aging test is conducted for 500 h.

The invention relates to the technical field of conveying belts, discloses an impact-resistant flame-retardant rubber conveying belt for an underground mine and a preparation method of the impact-resistant flame-retardant rubber conveying belt, and aims to solve the problems of matrix embrittlement caused by filling of a flame retardant and easiness in delamination under impact. The conveyor belt comprises a covering rubber layer, a gradient buffer layer and a framework core layer from top to bottom. The covering rubber layer adopts an NR / BR / CPE blending matrix, and a superfine flame-retardant system and a liquid nitrile rubber toughening phase are added; the gradient buffer layer contains directionally arranged aramid short fibers to smooth the modulus. The preparation method relates to a multi-stage mixing and controlled cooling vulcanization process. According to the invention, the balance of flame retardance and physical properties is realized, the dynamic impact-resistant life of the belt body is remarkably prolonged by constructing a multi-stage energy dissipation system, the running temperature rise is effectively reduced, delamination is prevented, and the long-term service stability under a high-load working condition is ensured.

The invention relates to the technical field of polypropylene, and discloses a styrene-butadiene rubber toughened polypropylene antibacterial composite material, nano titanium dioxide can generate stress concentration and initiate micro-cracking of matrix resin, so that deformation work is absorbed, crack propagation is blocked and passivated, styrene-butadiene rubber is added into a polypropylene matrix, and in a proper range, the antibacterial performance of the polypropylene is improved. The surface of the quaternary phosphonium salt is positively charged, the quaternary phosphonium salt can be adsorbed on the surface of bacteria with negative electricity through coulomb acting force, and an alkyl chain can be mutually combined with a phospholipid bilayer on a cell membrane through hydrophobic interaction, so that bacterial death is caused; the nano titanium dioxide generates superoxide free radicals O2. And hydroxyl free radicals OH. To oxidize and decompose organic matters in bacteria to death the bacteria, and the composite material obtained by mixing the nano titanium dioxide with the polypropylene matrix has excellent antibacterial performance and toughness.

The invention discloses a high-flexibility wave-absorbing coating based on sphere / sheet compounding as well as a preparation method and application thereof, and relates to the technical field of electromagnetic shielding. The wave-absorbing coating comprises a spherical absorbent, a flaky absorbent, a rubber toughening agent, a resin matrix, a curing agent, a dispersing agent and an anti-settling agent. According to the invention, through the spherical absorbent / flaky absorbent blending'seesaw 'structural design, the reflection loss performance of the wave-absorbing coating is ensured, the frictional resistance among absorbent particles is reduced, the Poisson's ratio of the coating is improved, and the flexibility of the coating is enhanced.

This invention discloses a highly flexible absorbing coating based on a spherical / sheet composite, as well as its preparation method and application, relating to the field of electromagnetic shielding technology. The absorbing coating comprises spherical absorbers, sheet absorbers, a rubber toughening agent, a resin matrix, a curing agent, a dispersant, and an anti-settling agent. The invention utilizes a "seesaw" structure design combining spherical and sheet absorbers to maintain the absorbing coating's reflection loss performance while reducing frictional resistance between absorber particles, thereby increasing the coating's Poisson's ratio and enhancing its flexibility.

The invention provides a one-component epoxy structural adhesive and a preparation method and application thereof. The one-component epoxy structural adhesive comprises specific portions of bisphenol A epoxy resin, polyurethane modified epoxy resin, core-shell rubber toughening agent, reactive diluent, dicyandiamide, hydrazide complex, imidazole adduct and urea-based accelerator. The two epoxy resins are selected for matching, and two curing agents, dicyandiamide and hydrazide complex, are used for coordination, and imidazole adduct and urea-based accelerator are used for assistance, so that the one-component epoxy structural adhesive not only has a lower curing temperature, but also has excellent storage stability, can be stably stored at room temperature for up to 6 months, and the cured product obtained after curing has high strength and high toughness.

The dicyandiamide-cured ricinoleic acid modified epoxy glue is prepared from the following components in parts by weight: 80 to 100 parts of ricinoleic acid modified epoxy resin, 10 to 40 parts of a core-shell structure rubber toughening agent, 5 to 15 parts of dicyandiamide, 0.1 to 5 parts of a curing accelerator, 0.1 to 1 part of an antioxidant, 0.1 to 4 parts of a coupling agent and 1 to 100 parts of filler, the ricinoleic acid modified epoxy resin is prepared by reacting 10 to 40 parts of ricinoleic acid, 80 to 100 parts of epoxy resin and 2 to 10 parts of diisocyanate. According to the dicyandiamide cured ricinoleic acid modified epoxy glue, hydrophobic ricinoleic acid is used for grafting and modifying epoxy resin, polyurethane is introduced to enhance the hydrogen bond effect so as to improve cohesion, meanwhile, the water resistance and peel strength of the epoxy glue are improved, and the dicyandiamide cured ricinoleic acid modified epoxy glue is used as a single-component latent epoxy glue with excellent performance.

The invention relates to the technical field of high-performance polymer materials, in particular to low-dielectric and high-temperature-resistant modified cyanate ester resin and a preparation method thereof. Advantages and characteristics of bisphenol A type cyanate ester monomers and bisphenol M type cyanate ester monomers are combined, and the dielectric property and the thermal stability are remarkably improved. Diallyl bisphenol A is introduced as a network structure modifier, the phenolic hydroxyl group of the diallyl bisphenol A adjusts the curing reaction rate, and the allyl and bisphenol A structures of the diallyl bisphenol A finely regulate and control the rigid-flexible balance of a cross-linked network through chemical copolymerization, so that the curing process is controllable and the final network structure is optimized. Meanwhile, a toughening system is innovatively designed, epoxy-terminated liquid nitrile rubber is adopted for toughening, stable micron-scale rubber particles are formed in a resin matrix in a chemical bonding mode, and the fracture toughness is improved. The modified resin has excellent dielectric properties, high heat resistance and a wide process window, and meets the strict requirements of a new generation of low observability aircrafts on a bearing-stealth integrated composite material matrix.

The invention provides a bicycle carbon fiber rim and a preparation method of a fiber yarn material for the bicycle carbon fiber rim, and belongs to the technical field of bicycle parts. The material is composed of pretreated carbon fibers and a modified glue solution. The modified glue solution comprises 80-120 parts of epoxy resin, 30-40 parts of a 4, 4-diaminobenzene sulfone curing agent, 10-20 parts of a polybutadiene rubber toughening agent, 2-4 parts of a bonding accelerant, 1-3 parts of an anti-hydrolysis agent, 2-5 parts of an acid and alkali resistant aid and 1-5 parts of micron-sized silicon dioxide; according to the preparation technology, the fiber yarn material for the rim is prepared through the technologies of fiber yarn surface activating treatment, modified glue solution step-by-step preparation, gradient gluing and pre-curing, high-pressure compounding and step curing, surface anti-corrosion layer sealing and the like, the corrosion resistance is greatly improved, the ultra-high temperature resistance is excellent, and the retention rate of the tensile strength at 200 DEG C exceeds 80%; the prepared wheel rim is outstanding in mechanical property, has no obvious damage after 1000km in actual road condition test, is small in rolling resistance change, and effectively solves the problems that in an original scheme, a glue solution is easy to separate from cellosilk, and the environment resistance is poor.

The invention provides natural rubber toughened and modified polylactic acid and a preparation method thereof, and belongs to the technical field of new materials. The method for toughening and modifying polylactic acid by natural rubber does not need any pretreatment step on the raw materials, and the modified material with excellent performance can be directly prepared by a melt blending method. The preparation method provided by the invention is simple, and the operation steps are simple and easy to implement, so that the preparation method is very suitable for large-scale industrial application, complex equipment or high-difficulty technology is not needed in the production process, the whole preparation process has the characteristics of high efficiency and economy, and the preparation method has very high practicability and wide application prospects in industrial production. The method provided by the invention not only simplifies the preparation process of the material, but also endows the material with excellent mechanical properties and low-temperature toughening effect, has the advantages of environmental protection and sustainable development, and has wide application prospects and market potential.

The present application discloses a luggage beverage rack and a preparation method thereof, and relates to the technical field of polymer materials. The raw materials of the luggage beverage rack include: 30-60 parts of PP resin, 10-40 parts of ABS resin, 10-20 parts of composite fiber, 5-15 parts of modified rubber toughening agent, 1-3 parts of antioxidant, 1-3 parts of dispersant, and 3-6 parts of compatibilizer; the composite fiber includes carbon fiber, PA fiber, and asbestos fiber, and the weight ratio of the three is 1: (0.5-1.5): (0.2-0.9); its preparation method is as follows: S1. After mixing PP resin, ABS resin, modified rubber toughening agent, and dispersant, stir and disperse them efficiently; then add composite fiber, and stir and disperse them efficiently; finally add antioxidant and compatibilizer, stir and disperse them, and obtain a mixture; S2. Put the mixture into an extruder for extrusion granulation; then mold it in a mold, cool, trim, and shape it, and obtain a luggage beverage rack. The luggage beverage rack provided by the present application has high load-bearing strength and impact strength.

The invention discloses a high-thermal-conductivity temperature-resistant bonding composite material for COB packaging and a preparation method, and belongs to the technical field of COB packaging materials. The problems of poor heat dissipation and low reliability of a COB product caused by low heat conductivity coefficient, fast bonding strength attenuation at high temperature, high brittleness and easy cracking after curing of an existing bonding material are solved. The composite material is formed by compounding epoxy matrix resin, silane modified boron nitride heat-conducting filler, a carboxyl-terminated nitrile rubber toughening agent and an imidazole curing agent according to a specific mass ratio, multi-element synergistic interaction of all the components is achieved through multiple interaction of covalent bonds, hydrogen bonds, coordinate bonds and the like, and the composite material can be directly adapted to coating and curing processes of an existing COB packaging production line; the adhesive is suitable for bonding and attaching substrates, heat dissipation layers and chip supports in various COB packaging of Mini / Micro LEDs, power semiconductors and the like, and the heat dissipation efficiency and the long-term use reliability of COB products are effectively improved.

This invention discloses a construction method for a thin-layer rubber-reinforced structure for a tunnel invert arch, comprising the following steps: Step 1, spraying concrete onto the initial support of the invert arch and leveling it to form a cement mortar leveling layer; Step 2, laying multiple rings of rubber-reinforced layers sequentially along the tunnel direction from the end onto the cement mortar leveling layer to form a rubber-reinforced layer structure. Each ring of the rubber-reinforced layer includes multiple polyurethane foam boards connected sequentially in the ring direction. A rectangular hole is formed in the center of each polyurethane foam board, and a rubber vibration damping pad is nested within each rectangular hole; Step 3, laying a waterproof sheet on top of the rubber-reinforced layer structure from Step 2; Step 4, pouring invert arch concrete onto the waterproof sheet. This method utilizes a rubber-reinforced layer structure, integrating vibration damping and load-bearing functions, which can absorb a large amount of energy from seismic dynamic loads and reduce the risk of structural resonance.

The present application belongs to the technical field of anticorrosive paint, and particularly relates to an epoxy bacteriostatic anticorrosive paint and a preparation method thereof. The composition comprises the following components: bisphenol A type liquid epoxy resin, epoxy-terminated polysiloxane, core-shell rubber toughening agent, glass flake, surface-modified nano-silicon dioxide, gamma-glycidyl ether oxypropyl trimethoxysilane, reactive silane quaternary ammonium salt, latent imidazole curing agent, dispersant, defoaming agent, leveling agent and organic solvent. The present application forms a functionally graded structure with a surface layer rich in silicon for bacteriostasis and an epoxy anticorrosive bottom through multi-component synergistic design and step-by-step dispersion process; the glass flake and modified nano-silicon dioxide synergistically improve the barrier density, the core-shell rubber toughening agent enhances the film layer crack toughness, the reactive silane quaternary ammonium salt realizes long-term bacteriostasis without damaging the film layer structure, and the latent imidazole curing agent ensures the storage stability of the system.

The invention discloses heat-conducting insulation paper with a high heat conductivity coefficient and a preparation method and application of the heat-conducting insulation paper, and belongs to the technical field of heat-conducting insulation paper. The heat-conducting insulation paper with the high heat conductivity coefficient comprises heat-conducting resin and insulation paper with the mass ratio being 100: (30-100), and the heat-conducting resin comprises bonding resin and heat-conducting powder with the mass ratio being 25-50: (50-75). The adhesive resin comprises modified epoxy resin and a flexibilizer, the modified epoxy resin comprises heat-resistant epoxy resin and a curing agent, and the flexibilizer comprises a polymer active modifier, a rubber flexibilizer and a thermoplastic flexibilizer. The heat-conducting powder comprises micron aluminum oxide, nano aluminum oxide, nano cubic boron nitride, nano spherical boron nitride and nano silicon dioxide. The compound heat-conducting powder and the modified toughening resin are creatively combined, and unification of high heat conductivity, high toughness and high insulation performance of the heat-conducting insulation paper is achieved.

The invention discloses a high-toughness low-thermal-expansion-coefficient photo-thermal dual-curing epoxy adhesive and a preparation method and application thereof, and belongs to the technical field of photo-thermal dual-curing epoxy adhesives. The photo-thermal dual-curing epoxy adhesive is prepared from the following raw materials in parts by weight: 10 to 18 parts of organic silicon modified epoxy spiro resin, 6 to 10 parts of photo-thermal dual-curing resin, 1 to 5 parts of novolac epoxy resin, 1 to 3 parts of epoxy diluent, 3 to 8 parts of rubber toughened epoxy resin, 0.5 to 1.5 parts of epoxy thermal initiator, 0.3 to 0.8 part of photoinitiator and 0.3 to 0.8 part of silane coupling agent. 70-80 parts of amphiphilic spherical silicon dioxide and 0.3-0.8 part of a stabilizer. The photo-thermal dual-curing epoxy glue has the advantages of low viscosity, high bonding strength, high elongation at break, low thermal expansion coefficient, low elastic modulus, high tensile strength and glass transition temperature, and good construction performance and construction effect when being used for electronic product packaging.

A polyurethane composition with delayed curing is prepared from raw materials including the following components: 10 parts by weight of a blocked polyurethane prepolymer; 10 - 15 parts by weight of bisphenol A epoxy resin; 15 - 25 parts by weight of a core - shell rubber toughening agent; 20 - 25 parts by weight of a liquid nitrile rubber - modified epoxy resin; 2 - 6 parts by weight of an active diluent; 1 - 3 parts by weight of a water absorbent; 4 - 5 parts by weight of a thixotropic agent; 15 - 25 parts by weight of an inorganic filler; 1 - 5 parts by weight of a latent curing agent; 0.1 - 0.15 parts by weight of a curing accelerator. The blocked polyurethane prepolymer is prepared by a three - stage reaction of polyisocyanate using a zinc - containing complex as a catalyst. This polyurethane composition with delayed curing uses a zinc - containing complex catalyst. By compounding with an alcohol amine, the catalytic efficiency of the zinc - containing complex catalyst is equivalent to that of a traditional organic catalyst. At the same time, the preparation process involves three - stage reactions of polyisocyanate, ensuring that the blocked isocyanate groups can be stably preserved and the isocyanate has high activity during curing.

The invention relates to a flow mark resistant polypropylene material and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the invention, ethylene propylene diene monomer with a branched structure is chemically grafted on carbon nanotubes to form an ethylene propylene rubber flexibilizer; the ethylene propylene rubber flexibilizer comprises a carbon nanotube with good heat conduction capability and a branched ethylene propylene diene monomer chain segment; the carbon nanotubes can effectively improve the heat-conducting property of a polypropylene material melt, and in the filling process, when the high-temperature melt is in contact with the surface of a mold, heat can be quickly transferred to the mold, so that the temperature of the mold is increased, and a better product surface can be obtained; the branched ethylene propylene diene monomer chain segment enables molecules to occupy more volume in the space and reduces interaction force and entanglement among the molecules, so that the viscosity of polypropylene melt is reduced, the flowability of the melt is improved, the melt is easy to fill in a mold, and flow marks on the surface of a product can be reduced.

The invention discloses a single-sided adhesive-coated PI film for a heating film and a preparation method thereof.The PI film comprises a release layer, a rubber modified epoxy adhesive layer and a PI film layer which are sequentially arranged in a stacked mode. Ethylene glycol of micromolecular dihydric alcohol is adopted as an initial raw material to prepare polyurethane modified epoxy resin which serves as a main material of the adhesive layer; adding a rubber toughening agent to prepare a heating film; through the toughening effect of the rubber, the flexibility, the bonding strength and the soldering resistance stability of the epoxy resin can be remarkably improved; the rubber has a high wetting and bonding effect on various metal substrates and is relatively good in cohesion, so that the bonding effect of the rubber layer on the metal heating wire and the PI film can be greatly improved, and the protection effect is enhanced; meanwhile, as the selected dihydric alcohol is ethylene glycol, carbamate bonds contained in the prepared polyurethane modified epoxy resin are small in spacing and can be adhered to the surfaces of filler particles at the same time, the compatibility of the filler and the resin is obviously improved, and the aging resistance of the material is greatly improved.

The invention relates to the field of performance testing, in particular to a method for testing the performance of a waste rubber composite modified asphalt mixture. The method comprises the following steps: preparing an integrated test piece, testing initial mechanical properties, performing a dynamic temperature-humidity-salt coupling freeze-thaw cycle test and performing a performance test after freeze-thaw to obtain initial compressive strength, actual compressive strength after freeze-thaw and a performance attenuation coefficient; calculating theoretical compressive strength after freezing and thawing based on the initial compressive strength and the performance attenuation coefficient; and based on the theoretical compressive strength after freezing and thawing and the actual compressive strength after freezing and thawing, evaluating the reliability and accuracy of the performance test method. The problems that in a traditional performance testing method, test piece preparation lacks a unified standard, and the performance of a test piece is unstable easily are solved; freeze-thaw cycle tests mostly adopt a fixed salt concentration or single temperature condition, resulting in inaccurate performance degradation evaluation. Performance attenuation is quantified based on simple strength comparison, so that an evaluation result deviates from reality; the quantification of the toughening effect of the waste rubber is insufficient.

To provide a modified nanocellulose capable of enhancing the strength of rubber.SOLUTION: The present invention provides a modified nanocellulose, comprising nanocellulose and a modifying group introduced into the nanocellulose, the modifying group having a carbon-carbon unsaturated bond and a carboxyl group.SELECTED DRAWING: None

The invention discloses a low-temperature-resistant impact-resistant MS light diffusion plate and a preparation method thereof, and belongs to the field of high polymer material processing. According to the invention, a plate with a surface layer-core layer-surface layer (ABA) structure is prepared by adopting a co-extrusion process. Wherein the board comprises the following raw material components in parts by weight: 70-120 parts of MS resin; 1 to 15 parts of a silicon rubber-acrylate based rubber toughening agent with a core-shell structure; the core layer (layer B) comprises MS (Murashige-Skoog) resin; the upper surface layer (A layer) and the lower surface layer (A layer) are formed by MS resin compositions including MS resin and flexibilizers, and the nanoscale core-shell flexibilizers with excellent compatibility are intensively distributed on the surface layers, so that the low-temperature impact toughness and the optical performance of the MS light diffusion plate are synergistically improved. The low-temperature resistance, yellowing resistance and mechanical strength are improved, the production process is simplified, the cost is reduced, and the requirements of the market for low-cost and high-performance light diffusion materials are met.

The invention relates to an electrostatic spraying process for a flame-retardant electrical cabinet metal plate, and belongs to the technical field of electrical cabinet surface treatment. The electrical cabinet sheet metal part is sequentially subjected to degreasing, acid pickling, phosphating, water washing and drying treatment; the preparation method comprises the following steps: putting epoxy resin, a modified aliphatic amine curing agent, 4-ferrocenyl butyl methacrylate, 4, 4 '-dimercaptodiphenyl sulfide, benzoyl peroxide, a composite flame retardant, a pigment filler, a carboxyl-terminated nitrile rubber flexibilizer, an acrylate leveling agent, an antioxidant and a diluent into a mixing machine, and mixing to obtain plastic spraying powder; the pretreated sheet metal part is placed in a spraying room, electrostatic spraying, curing forming and aftertreatment are conducted on the surface of the sheet metal part, and the flame-retardant electrical cabinet sheet metal part is obtained; the prepared plastic spraying coating is high in oxygen index, the vertical combustion grade reaches the V-0 grade, the flame retardant effect is excellent, and combustion accidents caused by high temperature and electric sparks of an electrical cabinet can be effectively prevented.

The present invention is directed to an electrically conductive composition comprising: a) a resin component comprising: 1) a first epoxy resin; and, 2) a second epoxy resin and / or a functionalised polybutadiene resin and / or a functionalised butadiene-acrylonitrile copolymer; b) a curative for epoxy resin; c) an electrically conductive filler; d) a one core shell rubber toughener; and, e) a reactive diluent component comprising 1) a monofunctional epoxy diluent and / or 2) a polyfunctional epoxy diluent; wherein said composition further comprises a curing agent if said functionalised polybutadiene resin is present in said resin component.

The invention relates to the technical field of photocuring tin printing ink, and particularly discloses high-toughness high-adhesion photocuring tin printing ink and a preparation method thereof. The invention relates to a high-toughness high-adhesion light-cured tin printing ink, which comprises 20-60 parts of a reactive liquid rubber toughening agent; 40 to 80 parts of an acrylic ester active monomer; 8 to 10 parts of a photoinitiator; the reactive liquid rubber flexibilizer comprises phosphate modified liquid rubber and acrylic acid modified liquid rubber. The high-toughness and high-adhesion light-cured tin printing ink can be used for the surface of an iron package, the phosphate modified liquid rubber provides adhesion and toughness, the acrylic acid modified liquid rubber provides compatibility and toughness, a crosslinking system is constructed by the phosphate modified liquid rubber, the acrylic acid modified liquid rubber and the acrylate active monomer, and the high-toughness and high-adhesion light-cured tin printing ink has the advantages of being high in adhesion, good in toughness and not prone to yellowing. The coating can be used for the surface of a light-color iron material packaging base material.