259 results about "Rosin" patented technology

The invention belongs to the field of plastic product production, and particularly relates to a composite material for preparing a textile dyeing tube. The composite material mainly comprises the following components in parts by weight: 10 parts of PET resin, 10 parts of ASA resin, 1-6 parts of matt master batches, 1-3 parts of titanium dioxide, 1-2 parts of rosin, 0-1.5 parts of an antioxidant, 0-1 part of a fire retardant and 1-2 parts of a lubricating agent, wherein titanium dioxide is rutile titanium dioxide. Compared with the prior art, the components are good in compatibility; the molded product has excellent physical and mechanical properties, low glossiness, high strength (caused by titanium dioxide) and good tenacity, and is suitable for injection molding of plastic products; the metallic luster caused by titanium dioxide can be reduced; the noise can be reduced; titanium dioxide can be used for disinfecting under irradiation of an ultraviolet lamp; the composite material is very convenient; and the lubricating agent is added, so that the surface is relatively smooth.

The invention relates to a lead-free and halogen-free soldering paste and a preparation process thereof, and belongs to the technical field of soldering paste production, through the combination of nano-silver-loaded carbon nanotubes, organically coated solder alloy powder and soldering flux, the surface tension of the lead-free and halogen-free soldering paste can be reduced by carbon nanotube surface carboxyl in the nano-silver-loaded carbon nanotubes, so that the lead-free and halogen-free soldering paste is obtained. Nano-silver and tin form an Ag3Sn strengthening phase which synergistically promotes wetting and spreading of the solder on a substrate, meanwhile, the carbon nanotubes loaded with the nano-silver are uniformly dispersed in the soldering paste to play a dispersion strengthening role, and the brittleness caused by bismuth segregation is effectively inhibited in cooperation with the grain refinement effect of copper and indium in the solder alloy powder; and the organic coating layer hydrogenated rosin-terpene resin and the soldering flux alcohol ether solvent form a slight dissolution-fusion effect, so that the welding flux alloy powder is prevented from being oxidized, an organic acid active agent can be released to remove a substrate oxidation film, the metallurgical bonding quality of a welding interface is further guaranteed, and the defects of pseudo soldering, cavities and the like are reduced.

The invention relates to the technical field of hot-melt pressure-sensitive adhesives, in particular to a hot-melt pressure-sensitive adhesive special for instillation type coating and a preparation method of the hot-melt pressure-sensitive adhesive. The hot-melt pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 25 to 35 parts of styrene block copolymer, 40 to 50 parts of tackifying resin, 20 to 30 parts of plasticizer and 0.1 to 0.5 part of antioxidant. Wherein the styrene block copolymer is preferably compounded from S-1528, 4411ND and 6241A, the tackifying resin is preferably hydrogenated rosin glyceride with the softening point of 85-90 DEG C, and the plasticizer is medical white oil. The 180-degree peel strength of the prepared product is larger than 5.0 N / 25 mm, the 180-degree viscosity is 2000-6500 cps, the instillation precision can reach + / -8 microns, and the product has excellent adhesive performance and process adaptability and is suitable for instillation type coating scenes.

The invention belongs to the technical field of adhesives, and relates to an epoxy resin composition, an epoxy resin adhesive film and application thereof. The epoxy resin composition comprises epoxy resin, a curing agent, a flexibilizer, a filler and rosin modified phenolic resin, the curing agent at least comprises a latent curing agent, the flexibilizer at least comprises acrylate rubber, the softening point of the rosin modified phenolic resin is 120-180 DEG C, the acid value is 40-100 mgKOH / g, and the filler is a filler. The rosin modified phenolic resin with the specific softening point and acid value is introduced, and the types of the curing agent and the flexibilizer are limited, so that the damping loss factor of an epoxy resin adhesive film prepared from the epoxy resin composition is relatively low in the range of 0-100 DEG C, and the stability of the damping loss factor is relatively high; meanwhile, the adhesive also has the characteristics of high elastic modulus, high toughness, high peel strength, good normal-temperature storage stability and good high-temperature rapid reactivity.

This invention provides a breathable plaster matrix for application and its preparation method, belonging to the field of polymeric dressings and plasters. The plaster matrix raw materials include terpene-modified rosin beeswax, hydrogenated rosin glyceryl ester, camellia oil, castor oil, stearic acid hydrophobically modified microcrystalline cellulose, zinc oxide, glycerin, coated citric acid, sodium bicarbonate, polyethylene glycol, camphor, and menthol. The terpene-modified rosin beeswax is prepared by reacting rosin and α-pinene in the presence of di-tert-butylperoxyisopropylbenzene, followed by the addition of white beeswax and maleic anhydride, and then the addition of trimethylolpropane. The stearic acid hydrophobically modified microcrystalline cellulose is microcrystalline cellulose coated with stearic acid. The coated citric acid is citric acid coated with hydrogenated castor oil. This invention's plaster matrix significantly improves skin breathability, application comfort, and biocompatibility while ensuring sufficient adhesion, formability, and drug loading capacity.

This invention discloses a gravure printing ink composition and its preparation method. The ink, by weight, comprises: 15-35 parts chlorinated polypropylene, 10-20 parts EVA-40W, 4-8 parts rosin-modified resin, 0.3-0.8 parts polyketide resin, 0.1-0.3 parts chlorinated ether resin MP45, 0.3-0.8 parts silica, 0.05-0.15 parts antistatic agent, 0.2-0.5 parts dispersant, 0.1-0.3 parts modified aluminum silicate AM660, 8-12 parts benzidine yellow, 6-10 parts fast red BHXL-T, 3-5 parts permanent orange yellow No. 13, 3-7 parts calcium powder, and 30-50 parts mixed solvent. During preparation, each resin is pre-dissolved separately, then mixed with pigments, additives, etc., and ground to a fineness ≤15μm. The ink of this invention has bright colors, good light resistance, excellent adhesion, antistatic properties, and printability, and is particularly suitable for gravure printing on polyolefin films.

A modifier for a thermoplastic resin that contains a rosin resin having a mass residual rate after heating for two hours at 300°C of 40 mass% or more and a mixed methylcyclohexane aniline cloud point (MMAP) of from -10 to 20°C.

The invention discloses a polyfunctional rosin-based reactive diluent. The structural formula of the polyfunctional rosin-based reactive diluent is shown as a formula (I) or a formula (II). The polyfunctional rosin-based reactive diluent has a rigid tricyclic diterpenoid structure of rosin, is small in molecular weight and low in viscosity, can be used for preparing an ultraviolet curing material, has excellent hardness and scratch resistance after light curing and film forming, and is simple in preparation method, low in cost and suitable for industrial production. And a polycarboxylic acid functional group is efficiently constructed under a mild condition.

The invention belongs to the technical field of high polymer materials, and particularly discloses glycidyl ester type epoxy resin and a preparation method thereof, the preparation method comprises the following steps: (1) melting polymerized rosin, adding a first catalyst, maleic anhydride, methacrylic acid and hydroxyl-terminated hyperbranched polyester, and reacting to obtain a precursor; and (2) adding bisphenol A epoxy resin and a second catalyst into the precursor, and reacting to obtain the glycidyl ester type epoxy resin. According to the invention, maleic anhydride, methacrylic acid, hydroxyl-terminated hyperbranched polyester and bisphenol A epoxy resin are combined; the three-dimensional synergistic enhancement of rigidity-flexibility-branching is realized, the proportion of rigid and flexible chain segments in a molecular structure is effectively coordinated, reaction active sites and crosslinking density are effectively improved, more reaction active sites and reaction activity are provided, and the mechanical property of a product is effectively improved.

The invention relates to an interlayer separant and application thereof. The interlayer separant is used between a polyurethane coating and an asphalt coiled material and is formed by a polyurethane coating, and the polyurethane coating comprises the following components: maleic anhydride modified polyurethane, silane modified polyurethane, maleic anhydride modified colloid and a solvent; the maleic anhydride modified polyurethane is obtained by reaction of raw materials including polyol, maleic anhydride, isocyanate and a catalyst; the silane modified polyurethane is obtained by reaction of raw materials including polyol, a silane coupling agent, isocyanate and a catalyst; the colloid is selected from one or a combination of more of petroleum resin, asphalt, rosin resin, terpene resin, butadiene-styrene rubber and butyl rubber; the maleic anhydride modified colloid is obtained by reacting raw materials including maleic anhydride, colloid and an initiator. The interlayer separant can isolate migration of auxiliaries such as a plasticizer in a traditional polyurethane coating and improve the compatibility and bonding performance of the traditional polyurethane coating and an asphalt coiled material.

This invention belongs to the field of printing consumables technology, specifically relating to a thermally foamed anti-counterfeiting inkjet ink. The thermally foamed anti-counterfeiting inkjet ink comprises an organic fluorescent dye, a solvent, a humectant, a resin, and additives; the solvent includes at least one selected from ethanol, n-propanol, isopropanol, n-butanol, and dimethyl acetate; the humectant includes at least one selected from ethylene glycol, diethylene glycol, and glycerin; and the resin includes rosin resin or modified rosin resin. The thermally foamed anti-counterfeiting inkjet ink has advantages such as extremely low viscosity and surface tension, and good continuous printing performance.

The application provides a flux for spot soldering of soldering paste; raw materials of the flux include, by total mass: 2-7% of acid modified rosin, 25-38% of disproportionated rosin, 1.3-4% of compound active agent, and solvent supplementing the rest to 100%; the compound active agent includes halogen-containing active agent and / or organic acid active agent; the organic acid active agent includes at least two of organic acid with normal pressure boiling point of 90-180 DEG C, organic acid with normal pressure boiling point of 200-300 DEG C, and organic acid with normal pressure boiling point of 305 DEG C or more; the solvent includes organic matter with at most 3 unsaturated structures and at least 1 polar group, and reduces post-soldering residue; the application effectively reduces the amount of acid modified rosin, and expands the soldering temperature range of the flux; the soldering paste of the flux is very suitable for spot soldering operation process due to excellent flow viscosity, wettability and expansion rate, and has high soldering reliability.

The invention discloses washable modified rosin resin, a preparation method thereof and washable mark pen ink. Wherein the washable modified rosin resin is prepared from the following components in parts by weight: 40 to 60 parts of natural rosin and 15 to 30 parts of maleic anhydride; 5 to 15 parts of polyol; 15 to 38 parts of an acrylic ester monomer; 3 to 10 parts of a pH responsive monomer; wherein the pH (Potential of Hydrogen) responsive monomer is dimethylaminoethyl methacrylate. Natural rosin is modified by adopting maleic anhydride and polyhydric alcohol, so that a molecular structure contains a large number of polar groups such as carboxyl, hydroxyl, ester groups and ether bonds, good stability is achieved, sedimentation and layering of pigments in ink can be effectively prevented when the rosin is prepared into the ink, and uniformity and consistency of writing colors are guaranteed. By adding the pH responsive monomer, in a cleaning state, tertiary amine groups are protonized, molecular chains are curled, the hydrophilicity is remarkably enhanced, the adhesive force is greatly reduced, and super-easy cleaning is realized.

The application provides a modified polyurethane primer and a preparation method thereof. The preparation raw material of the modified polyurethane primer comprises 15-25 parts of tackifying resin, 15-25 parts of crosslinking resin, 5-9 parts of pigment carbon black, 0.5-1.0 part of catalyst and 50-60 parts of solvent, the tackifying resin is obtained by the reaction of first polyester diol, diisocyanate and hydroxyl-terminated organic silicon modified rosin-based end-capping agent, the hydroxyl-terminated organic silicon modified rosin-based end-capping agent is obtained by the reaction of epoxy silane and rosin, and the crosslinking resin is obtained by the reaction of triisocyanate, second polyester diol and polyamino silane. The modified polyurethane primer provided by the application has excellent initial adhesion performance under low temperature (about 0 DEG C) conditions, meanwhile, the primer has the characteristics of strong adhesion, excellent storage stability, good durability, wide substrate adaptability and the like, is very suitable for use in cold winter environment, and can obviously shorten the fixture removal time of a main engine factory and the fast driving-off time in the after-sales market.

The present invention is directed to tall oil rosin in solid, crystalline form. The tall oil rosin according to the present invention has a very low color, i.e. it is essentially color-less. The present invention is also directed to a process for producing the tall oil rosin and to the use of the tall oil rosin according to the present invention.

The application belongs to the technical field of precision casting, and particularly relates to a high-viscosity and high-strength precision casting adhesive wax and a preparation method thereof. The adhesive wax comprises the following components: 30-40 parts of paraffin wax, 16-24 parts of microcrystalline wax, 25-30 parts of petroleum resin, 8-14 parts of rosin resin, 5-10 parts of EVA, 2-5 parts of LDPE and 0.1-2 parts of additives; wherein the LDPE is composed of two kinds of LDPE with different melt indexes. By introducing the petroleum resin, rosin resin, ethylene-vinyl acetate copolymer (EVA) and low-density polyethylene (LDPE) into the paraffin wax and microcrystalline wax base system, and controlling the proportion between the resin system and the polyolefin reinforcing system, the adhesive wax has high viscosity and hardness at 100 DEG C, and the bending strength is improved. Thus, the comprehensive performance of the adhesive wax is achieved, i.e., the adhesive wax is not easy to sag at high temperature, is not easy to be pressed at room temperature, and is not easy to crack under stress.

Disclosed herein is a method of using resin acids as defense gene inducers for biotic stress in a plant. Also disclosed herein are a composition including rosin and a method of using the composition as a defense gene inducer for biotic stress in a plant.

The invention discloses high-temperature halogen-free soldering flux, solder paste and a preparation method. The high-temperature halogen-free soldering flux comprises 30%-50% of a high-boiling-point solvent, 30%-40% of rosin, 1%-8% of modified thermoplastic resin, 5%-10% of an active agent, 0.5%-1.0% of a modified surfactant, 4%-8% of a thixotropic agent, 0.5%-3% of metal salt and 3%-5% of an antioxidant. The solder paste comprises 85%-88% of lead-free metal alloy powder and 12%-15% of high-temperature halogen-free scaling powder. Weighing an organic solvent, adding into a container, and heating to 80-95 DEG C; adding the thixotropic agent and uniformly stirring; the temperature is reduced to 60-70 DEG C, rosin, modified thermoplastic resin, an active agent, metal salt, an antioxidant and a modified surfactant are weighed and added, constant-temperature stirring is conducted till dissolution is achieved, bubbles in the scaling powder are discharged, the scaling powder is taken out and cooled into paste, the materials are ground, and the high-temperature halogen-free scaling powder is obtained.

The invention discloses a high-barrier two-component solvent-free polyurethane adhesive and preparation and application methods thereof. The high-barrier two-component solvent-free polyurethane adhesive comprises a component A and a component B. The component A comprises, by mass, 30-60% of aromatic polyester polyol and 40-70% of diisocyanate. The component B comprises a mixture of 50 to 70 percent by mass of aromatic polyester polyol, 5 to 20 percent by mass of rosin resin and 20 to 40 percent by mass of polyoxypropylene polyol. The composite film has high bonding strength and is suitable for bonding various aluminized soft package composite structures, the composite film has high barrier property, and the oxygen barrier value is lower than 10 cc / m < 2 >-day.

The invention relates to the technical field of pulping and papermaking, in particular to a rosin size preparation process which comprises the following steps: concentrating and screening paper pulp, feeding the pulp into a slushing pump, and injecting 1235T rosin size at an outlet of the slushing pump according to a proportion of 18kg / t; after the slurry enters the mixing pool, aluminum sulfate is added in three times, the addition amount of the aluminum sulfate on the surface layer / the bottom layer is equal to the ratio of the 1235T rosin size dosage to 0.8, and the pH value of the slurry is controlled to be stabilized at 5.0 + / -0.5; the fixed addition amount of aluminum sulfate in a core layer is 45 + / -5kg / t, and the pH value of the slurry is controlled to be stabilized at 6.1 + / -0.3; 15kg / t of dry strength agent, 5kg / t of talcum powder and 5kg / t of silica sol are simultaneously added into the core layer; the mixed slurry enters a buffer pool, the dispersion particle size is detected, and when the particle size ranges from 25 micrometers to 35 micrometers, the slurry is conveyed to a net part; and carrying out papermaking, and collecting production wastewater and solid waste. The three core problems of large dosage, poor water resistance and high environmental protection load in the traditional 1278 type rosin size process can be solved.

The utility model relates to the technical field of rosin paste production, and discloses a rosin rapid crusher for rosin paste production, which comprises a crushing box body and a crushing cylinder body, one side of the crushing box body is fixedly connected with the crushing cylinder body, one side of the inner bottom of the crushing box body is provided with a delivery port, one side of the crushing cylinder body is provided with an inlet port, and the other side of the crushing cylinder body is provided with a discharge port. A material conveying block is fixedly connected between the outlet and the inlet; and crushing rollers are rotationally connected to the two sides of the interior of the crushing box body correspondingly, a conveying belt is installed at the bottom of the interior of the crushing box body, a crushing bearing disc is fixedly connected to the interior of the crushing barrel body, a crushing disc is movably connected to the interior of the crushing barrel body, and a U-shaped frame is fixedly connected to the outer side of the crushing barrel body. According to the rapid rosin pulverizer for rosin paste production, rosin is pulverized through the two pulverizing mechanisms, the quality of the pulverized rosin is guaranteed, meanwhile, the pulverizing effect is improved, continuous operation can be achieved, and the pulverizing efficiency can be improved.

The utility model discloses a rosin hydrogenation high-pressure stirring device which comprises a stirring tank body, a top cover, a motor, a rotating shaft, a spiral blade, a filler mesh basket, a heating jacket, an annular pipe, a hydrogen supply device, a hydrogen recovery device, a hydrogen pipe and a recovery pipe, the top cover is located at the top of the stirring tank body, and the motor is arranged at the top of the top cover; the top cover is provided with a feeding port and a pressure regulating valve, the filler mesh basket, the annular pipe and the rotating shaft are located in the stirring tank body, a catalyst fixed bed is arranged in the filler mesh basket, the top of the rotating shaft penetrates through the top cover and is connected with the motor, the bottom of the rotating shaft penetrates through the filler mesh basket, and the top cover is connected with the motor. The spiral blade is located at the bottom of the rotating shaft and located below the filler net basket. The technical scheme is used for solving the problems of stirring effect and hydrogen dispersion of the existing rosin hydrogenation device.

The invention discloses a bagasse formaldehyde-free plate and a preparation method thereof, and aims to provide a method for preparing the formaldehyde-free plate through a hot pressing process by taking bagasse as a plant fiber raw material and polyacid modified rosin resin as a formaldehyde-free adhesive, and correspondingly provide a plate product directly obtained by the method. According to a GB / T 17657-2022 method, the density of the board is measured to be 0.70-1.10 g / cm < 2 >, the static bending intensity is larger than or equal to 20 MPa, the internal bonding strength is larger than or equal to 2.0 MPa, the water absorption thickness swelling rate is smaller than or equal to 8%, and the free formaldehyde emission is smaller than or equal to 0.1 mg / L (a dryer method); according to the technical scheme, the method comprises the following steps: S1, cleaning, drying, crushing and sieving bagasse; s2, under the protection of inert gas, rosin and unsaturated polyatomic acid are mixed according to the weight ratio of 100: (10-30), the temperature is increased to 180-250 DEG C, a reaction is conducted for 1-3 h, and polyatomic acid modified rosin resin is obtained; s3, uniformly mixing the bagasse obtained in the step S1 and the polyacid modified rosin resin obtained in the step S2 according to the weight ratio of 100: (5-15), paving the mixture in a hot press, performing hot pressing for 5-30 minutes under the conditions that the temperature is 160-240 DEG C and the pressure is 2-5 MPa, and performing cooling and shaping to obtain a bagasse formaldehyde-free plate; belongs to the technical field of artificial board manufacturing.

The invention discloses a high-bonding-strength waterproof adhesive tape for a rough surface and a preparation method of the high-bonding-strength waterproof adhesive tape, and belongs to the technical field of functional adhesive tape, the adhesive tape sequentially comprises a release layer, a high-bonding-strength adhesive layer and a reinforced base material layer from bottom to top, the adhesive layer takes a mixture of butyl rubber and polyisobutene as a main polymer, and the reinforced base material layer takes a mixture of butyl rubber and polyisobutene as an auxiliary polymer; and the raw materials such as ternary compound tackifying resin of C5 petroleum resin, C9 petroleum resin and hydrogenated rosin glyceride, and nano reinforcing filler treated by a silane coupling agent are matched. The preparation method adopts a hot melting coating process, and comprises the following steps: banburying, coating and compounding, rolling and curing. The adhesive tape has high thixotropy and good wettability, can adapt to rough surfaces of concrete, painted metal and the like, is excellent in initial adhesion and bonding strength, high in water resistance and weather resistance, convenient to construct and suitable for gap sealing and water resistance in the fields of buildings, pipelines and the like, and the preparation process is environment-friendly and efficient.

To provide a film-forming composition for removing which can easily remove a printed matter provided with a liquid printing ink on a film by an alkali treatment in a usual recycling process, and to provide a printed matter, a packaging material and a film for integrated packaging using the same.SOLUTION: There are provided a film-forming composition for desorption which can be desorbed from a base material by treatment with an alkali solution and contains a non-chlorinated polyolefin resin containing no chlorine atom, a rosin-based resin, and at least one selected from a polyamide-based resin and a urethane resin, and a laminate, a packaging material or an integrated packaging film having a primer layer formed of the film-forming composition for desorption.SELECTED DRAWING: None

The invention discloses a compression garbage truck metal plate coating with fireproof performance and a preparation method thereof, and belongs to the technical field of fireproof coatings. The compression garbage truck metal plate coating with the fireproof performance comprises the following raw material components in parts by mass: 33-48 parts of epoxy resin, 15-20 parts of a flame retardant, 3-9 parts of a corrosion-resistant filler, 14-16 parts of a diluent, 32-50 parts of a curing agent and 39-61 parts of a fluorocarbon toughening agent. Wherein the flame retardant is obtained by reacting a hydrogenated rosin-based silane coupling agent with ammonium polyphosphate; the hydrogenated rosin-based silane coupling agent is obtained by reacting hydrogenated rosin with an epoxy silane coupling agent; the corrosion-resistant filler is obtained by modifying basalt flakes with an amphiphilic silane coupling agent; the curing agent is an amine curing agent; the fluorocarbon toughening agent comprises perfluorooctanoic acid; the prepared compression garbage truck metal plate coating with the fireproof performance is good in corrosion resistance, fireproof and flame-retardant performance, impact toughness and abrasion resistance.

The invention discloses a glass fiber reinforced polypropylene material for blow molding and a preparation method thereof, and relates to the technical field of engineering materials. The composite material is prepared from the following raw materials in parts by weight: 10-20 parts of high-density polyethylene, 30-40 parts of homo-polypropylene, 20-30 parts of co-polypropylene, 5-10 parts of hollow glass beads, 10-20 parts of glass fibers, 1-3 parts of a compatilizer, 1-3 parts of a flexibilizer, 1-3 parts of a wear-resistant agent, 0.2-0.6 part of an antioxidant, 0.3-0.8 part of a lubricant, 0.2-0.5 part of a light aging agent, 1-3 parts of modified konjac glucomannan, 2-4 parts of modified whey protein, 0.3-0.8 part of Chinese insect wax and 0.5-1 part of hydrogenated modified rosin resin. And 1-2 parts of microencapsulated folium artemisiae argyi essential oil. The modified konjac glucomannan and the modified whey protein are matched with the flexibilizer to improve the impact strength, the Chinese insect wax and the lubricant are used for reducing the floating fiber grade, the microencapsulated folium artemisiae argyi essential oil and the hydrophobic modified chitosan are used for reducing the moisture absorption rate, and the wear-resistant agent and the lubricant are compounded to reduce the abrasion loss.

The application discloses a kind of for promoting walnut incision healing and preparation method and application thereof, it is related to walnut cultivation protection technical field.The healing paste is by elastic film-forming base phase 12-35%, high water absorption / water release humidity particle phase 3-12%, hydrophobic water-blocking microphase 5-22%, rheological and interface control phase 1-8%, osmotic pressure and water activity adjustment phase 5-20% and the rest amount of water and preservative etc.composition according to mass percentage;Film-forming base phase includes aqueous polyurethane-acrylate copolymer emulsion and modified polyvinyl alcohol or polyvinyl alcohol-starch blend, humidity particle phase includes crosslinked sodium carboxymethyl cellulose and crosslinked starch or alginate microparticles, hydrophobic microphase includes beeswax, microcrystalline wax, vegetable oil and rosin resin.By preparing each functional phase in turn and assembling in aqueous system, obtain the healing paste suitable for walnut incision protection under different climatic conditions.

A paste-like solder for vacuum soldering without flux, characterized in that the paste-like solder for vacuum soldering without flux consists of 45%-60% solder alloy powder and 40%-55% binder by mass; wherein the paste-like solder contains no flux; and wherein the solder alloy powder is made from 6%-10% Mg, 15%-20% Cu and 70%-75% Al by mass; and wherein the binder consists of 75%-85% hexanediol, 8%-12% rosin resin, 2%-6% 1-decanol and 1.5%-4% glycerol by mass; and wherein the particle size of the solder alloy powder is less than 49 µm.

The invention provides a photocuring flame-retardant antistatic coating and a preparation method thereof, and the photocuring flame-retardant antistatic coating comprises the following components in parts by weight: 30-50 parts of epoxy resin, 15-25 parts of modified polyacrylate emulsion, 2-5 parts of a photoinitiator, 1-3 parts of a leveling agent, 1-3 parts of a defoaming agent, 3-6 parts of a flame retardant, 1.5-3.5 parts of an antistatic agent and 20-25 parts of a solvent. The modified polyacrylate emulsion is a hydrogenated rosin modified epoxy group-containing agglomerated acrylate emulsion; the flame retardant is a sarcandra glabra extract modified by hollow glass beads and nano attapulgite; the antistatic agent is formed by compounding 1-vinyl-2-pyrrolidone with graphene. The photocureable coating with good flame retardant and antistatic properties is prepared by the preparation method disclosed by the invention.