33results about How to "Overcoming heat resistance" patented technology

The invention discloses a preparation technology of chloroprene rubber used for an external rubber layer of a rubber tube of an automobile air conditioning, comprising the process flows of making up a formula and preparing. In the invention, the technical scheme utilizing a heat-resisting modified formula to match with a corresponding preparation method is adopted, thus overcoming the problem of poor heat resistance in the prior art. The provided preparation technology of the chloroprene rubber used for the external rubber layer of the rubber tube of the automobile air conditioning prepares chloroprene rubber the application temperature of which is minus 30-135 DEG C, and the chloroprene rubber is used for manufacturing the external rubber layer of the automobile air conditioning, thus reaching the purpose of ensuring rubber tube products to resist heat and satisfy ELV instruction requirement.

The invention discloses a thermosetting epoxy resin composition and applications thereof. The thermosetting epoxy resin composition comprises, by weight, 100 parts of epoxy resin, 1 to 10 parts of aromatic diamine, 0.5 to 2.2 parts of dicyanodiamide, 30 to 200 parts of an inorganic filling material containing boehmite or / and barium sulfate, and 0.05 to 1.0 part of a curing accelerator. CTI of the thermosetting epoxy resin composition is larger than 600 V; the thermosetting epoxy resin composition is low in water absorption, and excellent in cohesiveness and machine processing characteristic; is capable of improving adaptive capacity of PCB in severe environment obviously, and can be used for producing prepregs and laminated boards used for preparing printed circuits.

The invention discloses a modification method of calcium carbonate and application of modified calcium carbonate in PVC pipes. The method includes: firstly conducting surface modification on calcium carbonate with disodium cocamidopropyl sulfosuccinate monoester and nonylphenol polyoxyethylene ether, and then using octa(aminophenyl)silsesquioxane and sodium laureth-4 phosphate for second surface modification. The modified calcium carbonate obtained by the invention has the characteristics of high dispersibility, high toughness, weather resistance, heat resistance, high strength, high toughness, etc, as the filler of the PVC pipe system, the modified calcium carbonate can endow pipes with high strength, high toughness, corrosion resistance, good heat resistance, strong impact resistance andother performance, prolongs the service life of the pipes and widens the application fields of the pipes.

The invention relates to an environmentally-friendly cross-linked acrylate polymer emulsion and a preparation method thereof. The emulsion consists of six main components through semicontinuous seeded emulsion polymerization, is fine and smooth in appearance and is a blue-fluorescent semitransparent emulsion, a pH value is 7.5+ / -0.5, the solid content is 30-50%, the emulsion particle diameter is 50-100 nanometers, and the polymer emulsion has good film-forming property and adhesion after film forming at the 80 DEG C temperature. The environmentally-friendly cross-linked acrylate polymer emulsion has the advantages that due to the fact that an amino acid based anionic surface active agent and an alkyl polyglucoside non-ionic surface active agent both have excellent biodegradability and environmental protection effect and are used for replacing commonly-used alkylphenol polyoxyethylene ether and an alkylbenzene sulfonate surface active agent having poor biodegradability, the environmentally-friendly cross-linked acrylate polymer emulsion is more environmentally-friendly, and the demand for the performances of the emulsion is met.

The invention relates to alkoxy end capping linear polysiloxane coupling agent and a synthetic method thereof, including cationic ring-opening reaction of organic silicon epoxy with trimethylchlorosilane or silicon tetrachloride or thionyl chloride to obtain monochloro-end capping linear polysiloxane, Alpha-chloro-Omega-trichloro linear polysiloxane, Alpha, Omega-dichloro linear polysiloxane respectively; then alkoxylated reaction of saturated solution of fatty alcohol sodium-alcohol with the prepared chloro-end capping linear polysiloxane to obtain degree of polymerization controllable alkoxy end capping linear polysiloxane. The polysiloxane has higher reaction activity and can be used in surface treatment and modification of various inorganic materials and organic polymer materials, and has advantages of one agent more performances, combination, synergistic action, low cost, high temperature resistance, non-volatilization and good durability, thus obtaining various modified inorganic fillers and organic polymer materials with excellent performance.

The invention discloses a storage tank type classified sorting system with a dust removal function. The system comprises a storage tank type classified sorting device and a warm induced air device. The storage tank type classified sorting device comprises a tank body, an inverted-funnel-shaped cyclone portion and four partition plates. The inverted-funnel-shaped cyclone portion is arranged on the upper portion of the tank body. The outer side wall of the inverted-funnel-shaped cyclone portion and upper space of the tank body form an airtight heat exchange cooling chamber. The heat exchange cooling chamber is provided with a cold air inlet and a hot air outlet. The inner side wall of the inverted-funnel-shaped cyclone portion and the middle space of the tank body form a cyclone classified sorting chamber. The cyclone classified sorting chamber is provided with an air inlet and an air outlet. The partition plates are arranged on the lower portion of the tank body to divide a bottom cavity of the tank body into four fan-shaped cavities. The arm induced air device is used for forming continuous circulation airflow having a negative pressure sucking effect. The design is scientific and reasonable, classified screening and dust removal are carried out during material storage, the production procedures are simplified, and the production efficiency and quality of expanded perlite are improved.

A kind of bimaleimide resin micropheres used as the ideal liquid-phase chromatographic filler is prepared through proportionally mixing the prepolymer of bimaleimide resin, inertial thermoplastic resin, and optional allylbiphenol A, moulding, solidifying at 150-180 deg.C for 2-5 hr and then at 180-250 deg.C for 2-8 hr, and washing with organic solvent for removing inertial thermoplastic resin.

The invention relates to a preparation method for a flame-retardant heat-resistant antenna radome base material. The preparation method comprises the following steps: preparing a filler with the average grain size of 180 nanometers by taking nano silicon dioxide foam, dodecylbenzene sulfonic acid, bismuth nitrate pentahydrate and methyl trichlorosilane as raw materials; preparing a resin prepolymer by taking DOPO, a bisphenol A cyanate ester monomer, a phenolic compound, 1,3,5-triglycidyl -S-triazinetrione, bisphenol A epoxy resin and diaminodiphenyl ether as raw materials; mixing the resin prepolymer with maleic anhydride; then sequentially adding poly(methylsilsesquioxane) and the filler; then adding isomeric undecanol polyoxyethylene ether phosphate potassium salt and glass beads to obtain a composite system; then injecting the composite system into a die coated with a release agent, carrying out mold pressing under a vacuum condition, and finally turning off a power supply and naturally cooling; and releasing the die to obtain the flame-retardant heat-resistant antenna radome base material. The flame-retardant heat-resistant antenna radome base material has excellent flame retardance and heat resistance, and the development application of the flame-retardant heat-resistant antenna radome base material is satisfied.

The invention discloses a preparation method of antibacterial sepiolite powder. The preparation method comprises the steps of sepiolite acid activation, preparation of a nano-silver micellar solution, absorption of nano-silver particles in the nano-silver micellar solution through sepiolite and the like. According to the preparation method, a surface active agent emulsion is adopted to produce a 'nano-pool' through self-assembly, a polymer monomer serving as an oil phase and a silver ion water solution and a reducing agent water solution serving water phases are mixed to form a nano-silver reversed-micelle micro-emulsion, and the sizes of the nano-silver particles can be controlled by controlling the size of the 'nano-pool'. In addition, the nano-silver particles in modified sepiolite adsorption sol are utilized, the prepared antibacterial powder overcomes the shortcomings of poor heat resistance, likely hydrolysis, volatility and high toxicity and has the safety and the heat resistance of inorganic antibacterial powder, and the price of an antibacterial agent is reduced. Furthermore, the antibacterial broad spectrum activity is ensured, and accordingly the preparation method can be widely applied to the fields of building materials, medical facilities, medical apparatuses and instruments, daily supplies and the like.

The invention provides a halogen-free flame-retardant fiberglass-reinforced PA (Polyamide) / ASA (Acrylonitrile Styrene Acrylate Copolymer) composite material. The halogen-free flame-retardant fiberglass-reinforced PA / ASA composite material is prepared from the following components in parts by weight: 20 to 65 parts of PA, 10 to 30 parts of an acrylonitile-styrene grafted acrylate rubber copolymer,10 to 25 parts of a flame retardant, 2 to 5 parts of a compatilizer, 10 to 30 parts of fiberglass, 3 to 8 parts of a toughening agent, 0.1 to 1 part of a nucleating agent, 0.1 to 1 part of a lubricating agent and 0.1 to 1 part of an antioxidant. According to the halogen-free flame-retardant fiberglass-reinforced PA / ASA composite material provided by the invention, compounding of the ASA and the PAis adopted, so that the water absorption performance of the PA is effectively improved, the material shrinkage performance is reduced, the size stability is remarkably improved, and meanwhile, good weather resistance and good aging resistance are given to the halogen-free flame-retardant fiberglass-reinforced PA / ASA composite material.

The present invention provides a heat insulating and flame retardant felt, which is mainly prepared from high density polyethylene, added with glass fiber, wollastonite, montmorillonite, potassium titanate, zinc oxide, an ethylene-propylene-diene monomer, butadiene-acrylonitrile rubber, styrene-butadiene-styrene terpolymer, ethane-octylene copolymer, carbon nano-tube, calcium carbonate superfine powder, polypropylene grafting maleic anhydride, 2, 4, 6-tert-butyl phenol, and a colouring agent. Ingredients of the mixed materials for preparing the heat insulating and flame retardant felt are appropriate, which can overcome problems of poor toughness, low heat resistant grade and so on existed in normal polyethylene composite material felts.

The invention discloses a method for preparing pure-cotton fabric easy to decontaminate. The method comprises the steps that one liter of solution is prepared from 6-18 g of poly(ether ether ketone), 5-17 g of hydrogen atom donor polymer, 1.3-9.3 wt% of cross-linking agent, a proper amount of acetic acid used for adjusting the pH value of finishing liquor to be 2-5, and the balance deionized water; pure-cotton fabric is coated with the composite finishing liquor; preheating is conducted for 6-15 min in a 120 DEG C oven; baking is conducted for 30-60 s in a 170 DEG C baker; platinum salt finishing liquor printing is conducted in a circular screen printer, and drying is conducted with hot wind; the platinum salt finishing liquor is placed in a photochemical reactor and irradiated by 350 nm ultraviolet light so that platinum ions can be reduced into platinum nano particles; the fabric is cleaned on an open-width washing machine to remove thickeners on the surface of the fabric; tentering, setting and drying are conducted under 180 DEG C with a hot wind setting machine, so that the pure-cotton fabric easy to decontaminate is obtained. The pure-cotton fabric easy to decontaminate prepared with the method feels soft, is quite easy to decontaminate and can be widely applied to the field of protection garments easy to decontaminate.

The invention discloses a production method of a plastic bucket, which comprises the following steps: proportionally putting the components into a stirrer, sufficiently stirring uniformly, and adding the mixture into a double screw extruder to perform extrusion and granulation, wherein the extrusion temperature is 165 DEG C. The production method overcome the defects of poor heat resistance, poor user experience, short service life and the like in the prior art, thereby implementing the advantages of favorable heat resistance, favorable user experience and long service life.

The invention belongs to the field of printing machining and particularly relates to a method for improving ink adhesion in a plastic printing product. The method includes the following steps of (1) pretreatment of the plastic product and (2) printing. An ion sputtering method is adopted to conduct oxidation treatment on the surface of the plastic product, energy can be rapidly transferred to a special functional group on the plastic surface, and purposes of even heating and even oxidization are achieved; printing ink is prepared in the manner that based on ordinary ink, microcrystalline wax, N, N-dimethylaniline, lignin-based epoxy resin and a surface active agent are added, and consistency and permeability of the ink and the plastic product are increased. The plastic printing product prepared through the method has the advantages that adhesion between the plastic product and the ink is high, and friction resistance is achieved.

The invention provides a silicon-containing tung oil-based alkyd resin as well as a preparation method and an application of the alkyd resin. The maleic anhydride is reacted with the tung oil under conventional heating or microwave heating to obtain maleic anhydride modified tung oil; the reaction of the maleic anhydride and the tung oil is the reaction of the double bond of the maleic anhydride with an unsaturated double bond on a fatty acid chain; after the reaction is completed, the unreacted maleic anhydride is removed by use of the method of heating and vacuumizing, and recovered by use of a condensing device for later use; under the action of a catalyst, the maleic anhydride modified tung oil is mixed with hydroxy-terminated polydimethylsiloxanes different in molecular weights for thermosetting cross-linking; and besides, vacuum degassing treatment is performed and finally, the silicon-containing tung oil-based alkyd resin can be obtained. The silicon-containing tung oil-based alkyd resin is prepared by use of a two-step synthesis technique; the method is easy to operate and the product quality is stable; and the process is quite simple, prone to industrial enlarged production and high in practicability.

The invention discloses an antistatic polypropylene composite material capable of being used for an explosion-proof container and a preparation method of the antistatic polypropylene composite material. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 68 to 90 percent of polypropylene, 10 to 25 percent of an antistatic agent, 0.1 to 2 percent of a stabilizer and 0 to 5 percent of other additives. Through the synergistic effect of various antistatic agents, the antistatic polypropylene composite material with the surface resistivity of 10 <5>-10 <8> ohm is obtained, and the antistatic polypropylene composite material is suitable for various injection-molded or blow-molded containers or other products with explosion-proof requirements.

The invention discloses a preparation method for quaternary ammonium or quaternary phosphonium modified chlorinated natural rubber, which includes the steps: dissolving the chlorinated natural rubber by organic solvent, then adding an organic amine compound or organic phosphine compound for reaction, and obtaining the quaternary ammonium or quaternary phosphonium modified chlorinated natural rubber after extraction, suction filtration, drying and the like. The quaternary ammonium or quaternary phosphonium modified chlorinated natural rubber prepared by the method is efficient, low in toxicity and broad-spectrum in antibiosis, can be applied to preparation of antibiotic rubber or plastic products, can also be applied to the fields such as water pollution microbiological treatment, agriculture or tumor targeting medicines and the like, and is wide in application prospect.

The invention discloses a low-halogen flame-retardant epoxy resin adhesive and a preparation method thereof. The low-halogen flame-retardant epoxy resin adhesive is prepared from the following raw materials in parts by mass: 80-120 parts of epoxy resin, 5-100 parts of a curing agent, 5-25 parts of a diluent, 20-40 parts of a flame retardant, 1-10 parts of a dispersant, 1-20 parts of a coupling agent, 1-10 parts of a defoaming agent, 0.01-0.1 part of footballene and 0.01-0.05 part of silicon carbide ceramics. The preparation method provided by the invention is simple and easy to implement, energy-saving and environmentally-friendly; furthermore, the prepared epoxy resin adhesive is low in halogen content, good in flame-retardant effect and high in bonding strength, and can well meet the market demands.

The present disclosure provides a high temperature-resistant silicone rubber. The silicone rubber comprises methyl vinyl silicone rubber, white carbon black, hydroxy silicone oil, hydrogen-containingsilicone oil, a heatproof additive and 2,5-dimethyl-2,5-di-(tert-butylperoxy)hexane. The heatproof additive added to the high temperature-resistant silicone rubber can significantly improve the residual quality of the silicone rubber at a high temperature, overcomes the disadvantage of poor compatibility between a commonly used heatproof additive and the silicone rubber, and maintains the originalmechanical properties of the silicone rubber.

The invention discloses a fireproof flame-retardant plastic optical cable which is characterized by comprising a plastic optical fiber and a sheath wrapping the outer side of the plastic optical fiber. The plastic optical fiber comprises a plastic optical fiber core wire and a covering layer formed on the plastic optical fiber core wire; the plastic optical fiber core wire is prepared from the following components in parts by weight: 100 parts of an allyl methyl carbonate / GAM MA-butyrolactone-3-yl methacrylate / 2-methyl-4-pentanoic acid copolymer, 4-8 parts of a nano hybrid hyperbranched polymer HB-SiO2, and 1-2 parts of boric acid; the covering layer is prepared from the following raw materials through ultraviolet curing: 5 to 8 parts of 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate, 15 to 25 parts of 2, 2, 3, 3-tetrafluoropropyl methacrylate, 8 to 12 parts of vinyl hyperbranched polysiloxane, 1 to 3 parts of glass fiber, 0.5 to 1.5 parts of a coupling agent and 0.4 to 0.8 part of a photoinitiator. The fireproof flame-retardant plastic optical cable disclosed by the invention is remarkable in fireproof flame-retardant effect, excellent in heat resistance, good in chemical corrosion resistance, aging resistance and durability and small in transmission loss.

A multifunctional composite powder of natural fibres and brucite, its modifier and the process for preparing its composite mother particles are disclosed. Said flame-retarding, antibacterial and reinforcing composite powder is prepared through superfine pulverizing for brucite, suspension atomizing of modifier, and directional loosening. Its modifier is composed of coupling agent and antibacterial trigger. The process for preparing said mother particles includes mixing modifier, antibacterial material, high-molecular organic polymer and viscosity decreaser, plasticizing, extruding out and cutting to become particles.

The invention discloses a silicon dioxide modified polypropylene antibacterial material and a preparation method thereof. The preparation method comprises the following steps: taking single-terminal hydroxyl polypropylene and 4-hydroxymethyl benzoic acid as reaction raw materials, and adding a silane coupling agent KH570 surface modified silicon dioxide doped with 4-hydroxymethyl benzoic acid prepare a polypropylene material with an antibacterial effect; 4-hydroxymethyl benzoic acid is an organic alcohol antibacterial agent and can cause denaturation, precipitation or solidification of microbial eggs of pathogens; the antibacterial functional group is connected to the PP resin through a chemical bond so that the defects that a common organic antibacterial agent is not resistant to heat, poor in compatibility with a PP matrix and not resistant to soaking and washing can be overcome, and the sterilization effect of the medical mask can be remarkably improved.

The invention discloses a preparation method of high-temperature-resistant easily-stripped printing water emulsion type resin, and the preparation method comprises the following steps: step 1) preparing a water-based emulsion of a nonionic emulsifier and an anionic emulsifier; step 2) under a stirring condition, after introducing nitrogen, adding a low-temperature initiator into the water-based emulsion of the step 1), and slowly dropwise adding a high glass transition temperature monomer into the water-based emulsion at a constant speed within 4-7 hours; step 3) preparing a high glass transition temperature resin seed emulsion; and step 4) and using a pump for pumping the high glass transition temperature resin seed emulsion obtained in the step 3) into a pre-emulsified nano oxide dispersion liquid for reaction to obtain the high-temperature-resistant easily-stripped printing water-emulsion type resin.

The invention relates to a high thermal conductivity and high voltage resistance power cable sleeve. A preparation method of the sleeve comprises the following components in parts by weight: 85-95 parts of polyolefin, 3-15 parts of heat conduction metal assistant, 3-5 parts of rigidity and roughness improvement assistant, and 3-5 parts of compatilizer. Through adding a certain ratio of nanometer-level heat conduction metal assistant in the preparation material, the power cable sleeve has excellent heat conduction performance for quickly and efficiently transferring heat generated by operating power cables to prevent the temperature increment of the power cables, so that stable carrying capability of the power cables is guaranteed, the service life of the power cables is prolonged, and the strength, the roughness and the heat resistance of the power cable sleeve are largely improved; and the power cable sleeve overcomes the bottleneck problems of the conventional sleeves such as weak strength, weak roughness, low heat resistance grade and weak heat conduction performance.

The invention discloses a heat-resistant rare earth aluminum alloy conductor for a power cable, and the conductor comprises an outer protection layer, the inner wall of the outer protection layer is fixedly connected with an armor layer, the inner wall of the armor layer is fixedly connected with an inner lining layer, the inner wall of the inner lining layer is fixedly connected with a wrapping tape, the inner wall of the wrapping tape is fixedly connected with a filling layer, the inner wall of the filling layer is fixedly connected with an insulating layer, and the inner wall of the insulating layer is fixedly connected with an aluminum alloy conductor. The heat-resistant rare earth aluminum alloy conductor prepared by the processing technology is compatible with the characteristics of the 8030 conductor and the 8A07 conductor at the same time, so that the heat-resistant rare earth aluminum alloy conductor can be used in a power cable and has the flexibility of an 8030 rod material and the heat resistance of the 8A07, the resistivity of the conductor at 20 DEG C is not greater than 29.73 n[hom].m, the tensile strength is 110-145MPa, and the elongation is not less than 6%. The heat-resistant rare earth aluminum alloy prepared through the processing technology overcomes the defects that a common aluminum alloy cable is not heat-resistant, and the current-carrying capacity is reduced due to temperature rise, self-crosslinking materials are selected in the aspect of materials, cost is reduced, pollution is reduced, and energy is saved.

The invention relates to the field of high polymer materials, and discloses a preparation method of a colorless transparent polyimide film with low yellowness and high mechanical property. Aminated nanocellulose and carboxylated nanocellulose are introduced into a full-fat ring type polyimide film; the aminated nanocellulose and the carboxylated nanocellulose respectively serve as diamine monomers and end-capping reagents, can participate in the reaction of alicyclic diamine and alicyclic dianhydride and are doped into a polyimide polymer main chain in a covalent bond form, the stability is good, the mechanical property and the heat resistance of the polyimide film can be improved, and the polyimide film can be used as a polyimide film. The high-temperature yellowing effect caused by amino groups on diamine can also be inhibited. The finally prepared polyimide film still has relatively high mechanical and heat-resistant properties while the light transmittance is greater than 90%.

The invention relates to a preparation method of a pouring material with a high dielectric property. The preparation method comprises steps as follows: high dielectric filler is added to a bifunctional epoxy system and stirred at 130 DEG C for 20 min, a monofunctional epoxy system and nano alumina particles are added at the temperature of 95 DEG C, the mixture is stirred for 130 min, and a glue liquor is obtained; the glue liquor is subjected to vacuum defoamation and added to a mold, and the pouring material with the high dielectric property is obtained after hot-pressing curing. The pouringmaterial has excellent flame retardance and heat resistance and particularly has the outstanding dielectric constant.

The invention provides an antibacterial oil-stain-resistant polypropylene material and a preparation method thereof, and the antibacterial oil-stain-resistant polypropylene material comprises the following raw materials in parts by weight: 72-88 parts of polypropylene, 1-4 parts of antibacterial master batch, 1-3 parts of a hydrophobic and oleophobic agent, 8-20 parts of an inorganic filler, 0.4-1 part of an antioxidant and 0.3-1 part of a processing aid, the hydrophobic and oleophobic agent is a fluorine-containing acrylate polymer prepared by radiation emulsion polymerization of methacrylic acid perfluoroalkyl ethyl ester or methacrylic acid perfluoroalkyl butyl ester and lauryl acrylate according to a mass ratio of 4: (5-7). The antibacterial activity is improved by compounding the inorganic antibacterial agent and the organic antibacterial agent, and the hydrophobic and oleophobic agent has excellent low surface tension, so that the product is high in antibacterial activity and excellent in oil stain resistance, and the influence on the mechanical property of the material is very small.

The invention discloses an insulating plate for manufacturing a tea tray, which is characterized by being prepared from, by weight, 150-200 g of formaldehyde, 150-160 g of phenol, 6.8-7.6 g of ammonia water, 40-80 g of cashew nut oil, 140-150 g of ethyl alcohol, 1-5 g of oleic acid, 2-8 g of hexamethylenetetramine, and 20-40 g of magnesium hydroxide. The insulating plate has the advantages that the defect that various materials difficultly meet the requirements on corrosion resistance, heat resistance, appearance attractiveness, price, environmental friendliness and the like is overcome, the insulating plate that has good properties and low price is provided, a preparation method of special modified phenolic resin adhesive is provided, and the preparation method is simple and easy to perform, low in environmental damage and low in cost.

The invention discloses a roof waterproof sealant. The roof waterproof sealant is prepared from, by weight, 60-64 parts of polysulfide rubber LP, 8-10 parts of semi-reinforcing furnace black, 4.5-5.8 parts of glyceryl monostearate, 3.2-3.5 parts of lead dioxide vulcanized paste, 2-3 parts of sulfur, 40-50 parts of water, 5-7 parts of fumed silica, 2-4 parts of DBP plasticizer and 5.7-6.1 parts of titanium dioxide. The roof waterproof sealant has the advantages of being convenient to use and easy to store and overcomes the defects that an existing single-component sealant is poor in heat resistance, high in water absorption, low in mechanical strength, poor in flexibility, low in storage stability and complex in preparing process.