84 results about "Vinyloop" patented technology

The invention discloses incombustible water-based aerosol spray paint and a preparation method thereof, and relates to the technical field of spray paint. When the non-combustible water-based aerosol spray paint is prepared, firstly, p-(triethoxysilyl) acetophenone reacts with trimethylchlorosilane, and then the reaction product and tetramethyl tetravinyl cyclotetrasiloxane are subjected to ring opening polymerization to obtain modified polysiloxane; grafting epoxy resin with 4-vinyl-methyl benzoate, reacting with modified polysiloxane to obtain modified epoxy resin, and emulsifying to obtain a modified epoxy resin emulsion; secondly, reacting the silicon dioxide subjected to acylating chlorination with 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine nitroxide free radicals, reacting with 3-(3-thienyl) propionaldehyde, and reacting with thiophene and 3-vinyl thiophene to obtain modified silicon dioxide; and finally, mixing the modified epoxy resin emulsion, pure water, the modified silicon dioxide, a curing agent and a photoinitiator to prepare the incombustible water-based aerosol spray paint.

The invention discloses a high-performance adhesive for automobile glass process protection, and relates to the technical field of adhesives, and the high-performance adhesive is prepared from the following raw materials: hyperbranched perfluoropolyether urethane acrylate oligomer, methyl vinyl silicone rubber, isocyano ethyl methacrylate, hexahydro-1, 3, 5-tris (hydroxyethyl)-s-triazine, 2, 4, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 2, 4, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 2, 4, 5-trimethyl-1, 3-pentanediol The coating is prepared from the following raw materials: 2, 6-trivinyl boroxane, methyl vinyl di (diacetylketoxime) silane, N-vinyl caprolactam, 2-(1-propylene-2-yl) benzo [D] oxazole, 3, 3 '-diamino-4, 4'-difluorodiphenyl sulfone, 3-(1, 1-difluoro-2-propylene-1-yl)-2 (1H)-quinoxalinone, a diluent, a photoinitiator, a catalyst and a defoaming agent. The adhesive is high in adhesive strength, excellent in high temperature resistance, good in adhesive removing performance and safe and environment-friendly to use.

The invention relates to a laminated film for wafer back grinding and a preparation method thereof, and belongs to the technical field of semiconductors. The laminated film comprises a base material layer, a buffer layer, a UV visbreaking layer and a release layer which are arranged in sequence, the buffer layer comprises first resin, second resin and a catalyst; the first resin is a random copolymer, and the second resin is selected from a block copolymer or a core-shell polymer; the first resin comprises a first hard monomer, a first soft monomer, a first functional monomer, an acrylic block copolymer, a first initiator and a first solvent; the UV visbreaking layer comprises a second hard monomer, a second soft monomer, a second functional monomer, vinyl cyclohexane, a second initiator, a cross-linking agent, a UV monomer and a second solvent. According to the laminated film, the adhesion performance between the buffer layer and the base material layer and between the buffer layer and the UV visbreaking layer is excellent, the layering phenomenon in the grinding process is prevented, the integrity and stability of the laminated film are ensured, the laminated film is suitable for different material surfaces, and the application range of the laminated film is widened.

The invention discloses a super-hydrophobic self-repairing composite film for deicing fan blades and a preparation method of the super-hydrophobic self-repairing composite film. Isocyanate-based polyurethane and a hydroxyl-containing shape memory polymer are dissolved in cyclohexanone, and a mixed solution is obtained; spin-coating the mixed solution on the surface of glass fiber reinforced resin to form a substrate layer; uniformly mixing a microcapsule material and vinyl epoxy resin in methyl ethyl ketone, and spin-coating the mixture on the substrate layer to form a functional layer; and spraying the modified nano SiO2 particle suspension onto the functional layer to obtain the super-hydrophobic layer. The composite film has long-acting anti-icing performance, the self-repairing function of the composite film can cope with mechanical wear and environmental erosion, the shape memory polymer cooperates with pneumatic stripping of an ice layer through temperature triggering deformation, meanwhile, the nano structure enhances wear resistance and chemical inertness, and the composite film adapts to extreme environments such as low temperature and high humidity. The process is green and efficient, raw materials are easy to obtain, the operation and maintenance cost is remarkably reduced, and intelligent and sustainable anti-icing protection is provided for the fan blade.

The present invention belongs to the technical field of coatings, and in particular discloses a vinyl epoxy siloxane modified acrylic resin and a preparation method therefor. The vinyl epoxy siloxane modified acrylic resin is a vinyl epoxy polysiloxane graft-modified acrylic resin synthesized by using styrene, an acrylate monomer with a specific composition, vinyltriisopropoxysilane, etc., as comonomers, producing a copolymer therefrom under the action of an initiator, and then grafting epoxy siloxane thereto by means of a chemical synthesis modification method. By means of a copolymerization reaction and grafting modification, the molecular chains of the resin are endowed with a relatively large number of silane branches and an appropriate amount of epoxy groups and silane groups, which are uniformly distributed, thereby increasing the glass transition temperature of the resin. Also disclosed in the present invention are a weather-resistant topcoat based on the vinyl epoxy siloxane modified acrylic resin, and a preparation method therefor. The relatively high glass transition temperature of the vinyl epoxy siloxane modified acrylic resin ensures that the weather-resistant topcoat has good self-drying performance and medium resistance.

The invention discloses a high-performance composite geotextile and a preparation method thereof, and relates to the technical field of geotextile, the high-performance composite geotextile sequentially comprises a functional protective layer, a fiber reinforced layer and a base layer from top to bottom; the functional protection layer is prepared from the following raw materials in parts by weight: 5-8 parts of 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate, 6-10 parts of 1-allyl-3-vinyl imidazole chlorine salt, 1-3 parts of 2, 4, 6-trivinyl boroxane, 1-3 parts of 3-(1, 2, 4-triazole-2-yl)-4-hydroxyphenyl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2 The invention relates to a high-temperature-resistant coating which is prepared from the following raw materials in parts by weight: 1-3 parts of 1, 1-difluoro-2-propylene-1-yl)-2 (1H)-quinoxalinone, 2-4 parts of vinyl trimethoxy silane and 0.1-0.3 part of an initiator. The composite geotextile is sufficient in mechanical property and good in antibacterial property and aging resistance.

The invention relates to a base material of a self-lubricating sliding bearing as well as a preparation method and application of the base material. The base material comprises a component A, a component B and a component C, and the mass ratio of the component A to the component B to the component C is (0.4-0.8): (0.1-0.3): (0.1-0.3); wherein the component A is prepared from the following raw materials: vinyl cyclic siloxane, 1-thioglycerol and methacryloyl isocyanate; the component B is prepared from the following raw materials: a hexamethylene diisocyanate tripolymer and 2-hydroxy propyl methacrylate; and the component C is prepared from the following raw materials: a diphenylmethane diisocyanate tripolymer and 2-hydroxy propyl methacrylate. The compression strength and the compression modulus of the base material are both higher than those of commercially available resin, the bearing performance of the self-lubricating sliding bearing is greatly improved, meanwhile, the wear rate of the bearing is reduced through the high-crosslinking-degree resin, the gasket is more wear-resistant, and the service life of the bearing is prolonged.

The invention discloses a polysiloxane silicone rubber waterproof coating and a preparation method thereof, and relates to the technical field of coating preparation. The polysiloxane silicone rubber waterproof coating at least comprises the following raw materials in parts by mass: a component A: 50-60 parts of vinyl-containing perfluoropolyether-b-polysiloxane; 10 to 15 parts of a hydrophobic modified binder; 6-8 parts of low surface energy modified silicon dioxide; 3 to 5 parts of tetramethyl tetravinyl cyclotetrasiloxane; a component B: 10-20 parts of vinyl phenyl silicone resin; 5-8 parts of hydrogen-containing silicone oil; 0.2 to 0.4 part of a platinum catalyst; and 0.05 to 0.1 part of an inhibitor. The polysiloxane silicone rubber waterproof coating prepared by the invention is suitable for long-term protection of various substrates, has high adhesive force, and particularly has waterproofness and mechanical wear resistance.

The present application relates to the technical field of adhesives, in particular to an adhesive composition, an adhesive and application, and a composite part. The adhesive composition comprises: an ionic liquid resin having a structure shown in formula I, a vinyl epoxy resin and a curing agent; wherein the curing agent is a free radical initiator; wherein in formula I, x is an integer selected from 1-10, y is an integer selected from 0-10, L ‑ is selected from anions. The adhesive prepared from the adhesive composition has good bonding force, can fill the gap between the metal sealing head and the plastic liner, has good low-temperature toughness, and further improves the sealing property of the plastic liner.

The invention discloses a flame-retardant high-wear-resistance polysiloxane composite coating material and a preparation method thereof, and the flame-retardant high-wear-resistance polysiloxane composite coating material is prepared from the following raw materials in parts by mass: 80 parts of dimethyl siloxane, 0.1-1 part of vinyl ring body, 0.01-0.05 part of catalyst, 1-4 parts of nano auxiliary agent, 0-0.3 part of hydrolysis auxiliary agent and 10-20 parts of additive, various raw materials can be conveniently injected into the mixing tank by arranging a plurality of fixed pipelines, then stirring blades, a mixing channel, a mixing stirring shaft and an inner wall scraping plate are driven to rotate by a first driving motor, then the mixing tank is driven to rotate by arranging a second driving motor, and the mixing stirring shaft and the mixing tank are opposite in rotating direction, so that the raw materials can be conveniently mixed. According to the raw material mixing device, the mixing tank is arranged, so that the mixing sufficiency of raw materials can be guaranteed, meanwhile, the uniformity between the upper layer and the lower layer of the raw materials can be further guaranteed, various raw materials can be fully fused, and the finished product rate and quality of products are improved, and a mounting groove, a mounting shaft, a supporting roller, a supporting ring frame and a limiting ring groove are arranged, so that the mixing tank is rotationally supported; therefore, the stability of the mixing tank in the operation process is improved.

The invention discloses a graphene ceramic lining heavy anticorrosion coating and a preparation method thereof, which relates to the technical field of anticorrosion coatings, and comprises the following raw materials in parts by weight: 20 to 30 parts of graphene oxide modified polyethylene powder; 12 to 16 parts of ethylene acrylic acid copolymer powder; 6 to 8 parts of maleic anhydride grafted polyethylene powder; 20 to 30 parts of titanate coupling agent modified magnesium oxide powder; 0.5 to 0.7 parts of n-butyl titanate; 2 to 3 parts of tetramethyltetravinylcyclotetrasiloxane; and 1 to 1.5 parts of polyvinyl alcohol. The graphene ceramic lining heavy anticorrosion coating has good corrosion resistance, can further improve the anticorrosion effect of the ceramic lining surface, can prevent the surface of the ceramic lining layer from being scratched by particles, ensure the service life of the ceramic lining layer, can adhere to the ceramic lining layer more firmly, and the protective coating formed after sintering has better hydrophobicity and better anti-pollution and anti-oil effects.

The invention relates to process for producing a nucleated polypropylene, comprising the steps of: (i) supplying a reaction stream comprising vinyl cycloalkane into a first reactor; (ii) polymerizing the vinyl cycloalkane in presence of a catalyst system to obtain a product stream, wherein the product stream comprises polyvinyl cycloalkane, unreacted vinyl cycloalkane, and the catalyst system; (iii) supplying the product stream into a second polymerization reactor containing propylene; and (iv) polymerizing the propylene in presence of the product stream and hydrogen to obtain the nucleated polypropylene; The mass ratio of the polyvinyl cycloalkane to the unreacted vinyl cycloalkane present in the product stream is ≤ 0.5. The invention further relates to the nucleated polypropylene obtained from the process and having suitable optical clarity and tensile strength.

The invention belongs to the technical field of high performance liquid chromatography, and particularly relates to a preparation method and application of chiral hybrid microspheres containing beta-cyclodextrin shells. Firstly, (3-mercaptopropyl) triethoxy silane and vinyl cyclodextrin are used as raw materials, and a beta-cyclodextrin derivative modified by triethoxy silane is generated in a mercapto-alkene click chemistry mode. And reacting the beta-cyclodextrin with tetraethyl silicate and solid silicon dioxide to obtain a core-shell hybrid microsphere containing a beta-cyclodextrin shell layer. The beta-cyclodextrin can be used as a chiral selective agent and has a chiral recognition function, so that the hybrid microsphere can be used as a chiral chromatographic stationary phase and is used for separation and analysis of chiral enantiomers, and compared with chiral hybrid microspheres containing beta-cyclodextrin shells in the prior art, the loading capacity and firmness degree of the beta-cyclodextrin on the surface of a matrix are improved; the chiral separation capability of the chiral hybrid microspheres is improved.

The invention discloses a negative electrode binder, a negative plate and a battery, the negative electrode binder comprises a core copolymer and a shell polymer connected outside the core copolymer, the core copolymer comprises a first aromatic vinyl structural unit and an acrylate structural unit; the shell polymer comprises a vinyl epoxy structural unit. According to the negative electrode binder provided by the invention, the core polymer comprises the first aromatic vinyl structural unit and the acrylate structural unit so as to balance rigidity and toughness; a vinyl epoxy structural unit is introduced into the shell polymer to form a crosslinkable functional group layer on the surface of the core polymer, so that a stable three-dimensional network structure is constructed. Through efficient cross-linking of epoxy groups in the shell polymer layer, the binder obtains extremely low electrolyte mass swelling rate and dissolution rate, the anchoring capability of the binder to a negative electrode active material and the long-term stability of an electrode structure are fundamentally improved, the cycle life of a battery is finally remarkably prolonged, and the use safety of the battery is guaranteed.

The invention discloses a high-efficiency halogen-free plastic flame-retardant additive and a preparation method thereof, and relates to the technical field of plastic additives, the high-efficiency halogen-free plastic flame-retardant additive is prepared from the following raw materials by weight: 35-45 parts of a modified porous nanoscale flame-retardant oxide / expanded graphite compound, 8-10 parts of organic phosphinic acid metal salt, 10-12 parts of a phosphorus synergist, 10-12 parts of a nitrogen synergist, and 3-5 parts of a coupling agent; the modified porous nanoscale flame-retardant oxide / expanded graphite compound is a porous nanoscale flame-retardant oxide / expanded graphite compound co-modified by 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, 2, 4, 6-trivinyl boroxane and diphenyl (4-vinyl phenyl) phosphine oxide. The additive is good in environmental protection property, remarkable in flame retardant effect, small in addition amount, good in compatibility with a plastic matrix and small in negative influence on mechanical properties of plastics.

The invention discloses an insulating varnish for a new energy vehicle battery pack and a preparation method thereof, relating to the technical field of insulating coatings. The insulating varnish is prepared from the following raw materials, measured by weight: 30-40 parts of a vinyl-containing hyperbranched polysiloxane, 15-20 parts of a functional film-forming copolymer, 20-30 parts of a filler, 1-3 parts of 5-vinylbicyclo[2.2.1]hept-2-ene, 2-4 parts of 2,4-diamino-6-diallylamino-1,3,5-triazine, 1-3 parts of 2,4,6-trivinylboroxine, 1-3 parts of bicyclo[2.2.1]heptanedimethylamine, 0.4-0.8 parts of a photoinitiator, 1-3 parts of an auxiliary agent, and 30-40 parts of a solvent. The insulating varnish has good insulation, strong adhesion to substrates, excellent resistance to high and low temperature cycling, and sufficient toughness.

The invention discloses a heat-insulating film and a preparation method thereof. The heat-insulating film comprises, from top to bottom, an embossed release paper, a heat-insulating layer and a back adhesive layer; the heat-insulating layer contains hollow glass microspheres, hydrophilic silica aerogel powder, nano ATO dispersion slurry and hyperbranched polyurethane acrylate composited with an auxiliary agent, and further contains 1,2,2-trifluorovinyl triphenylsilane / N-vinyl carbazole / 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate / glycidyl methacrylate copolymer, 2,4-diamino-6-diallylamino-1,3,5-triazine, 2,4,6-trivinyl boroxine, 2,6-bis(oxirane-2-methyl)-1,2,3,5,6,7-hexahydropyrrolo[3,4-f]isoindole-1,3,5,7-tetraketone and ethylene glycol dimethacrylate. The film has excellent flame retardancy, mechanical properties, aging resistance and heat insulation.

A modified polyurea coating and its preparation method, which relates to the technical field of coatings, includes component A and component B; Component A includes the following raw material components: functional polyurea, meso-tetramethyl-meso-tetra(p-aminophenyl)calix[4]pyrrole, initiator, auxiliary agent, catalyst A, solvent; Component B includes the following raw material components: isocyanatoethyl methacrylate, cage-like octasilsesquioxane containing epoxy groups and vinyl groups, 2,4,6-trivinylcyclotriboroxane, N-vinyl oxazolidinone; The functional polyurea includes the structural units introduced by the following monomers: diisocyanate polyethylene glycol, 2,2-bis[4-(4-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane, 3,3'-diamino-4,4'-difluorodiphenyl sulfone, 1,4-diamino-2,3-dicyanoanthraquinone. This coating has good bonding performance, sufficient mechanical and thermal properties, and excellent weather resistance.

The invention relates to the technical field of thermo-sensitive paper, in particular to a preparation method of release silicone oil and label backing paper.The preparation method comprises the following steps that 1, methylcyclosiloxane and tetramethyltetravinylcyclotetrasiloxane are mixed, stirred and heated; 2, carrying out a polymerization reaction under the action of a vinyl end-capping reagent and a basic catalyst, and after the polymerization reaction is finished, carrying out cooling, dilute acid neutralization, water washing and separation to obtain a polymerization solution; 3, rectifying the polymer liquid to remove low-boiling-point substances to obtain vinyl silicone oil; 4, a cross-linking agent is added into the vinyl silicone oil to be evenly stirred, then a platinum catalyst is added to be mixed, and the release silicone oil coating liquid is obtained.After the surface of the single-gloss paper is coated with the primer coating, a compact protection film is generated through drying and cross-linking, pores in the surface of the paper are sealed, and the silicone oil is prevented from permeating into the paper during silicon coating; the silicone oil furthest stays on the surface of the paper and is cured to form a compact release layer, thereby reducing the gram weight of coated silicon and saving the cost.

The invention belongs to the technical field of PVDC emulsion preparation, and particularly relates to water-based PVDC with high thermal stability and a preparation method of the water-based PVDC. Comprising a component A and a component B. During application, the component A and the component B are mixed for use; the component A is a PVDC-based emulsion system prepared by taking vinylidene chloride (VDC), methyl methacrylate (MMA) and a modified epoxy monomer as comonomers; the component B is a thermal stability enhanced functional emulsion system prepared by uniformly blending 2, 2 '-aza-bis (2-imidazoline) dihydrochloride, glycidyl methacrylate, bisphenol A type liquid epoxy resin and polyether amine; a polyether amine polyamine structure is used for absorbing hydrogen chloride decomposed by the PVDC emulsion, chain reaction with poor thermal stability caused by hydrogen chloride removal is terminated in time, and meanwhile, a small amount of vinyl epoxy monomer and a small amount of bisphenol A type liquid epoxy resin in PVDC emulsion copolymerization form a co-crosslinking structure to enhance the strength of a coating film.

The application discloses a kind of concrete anticorrosive coating with antibacterial and self-repairing and preparation method thereof, the anticorrosive coating includes the following weight parts of raw materials: 20-50 parts alicyclic epoxy resin, 100-150 parts vinyl resin, 30-50 parts multifunctional curing agent, 5-15 parts polyvinylamine resin, 10-25 parts silicone resin, 1-3 parts silane coupling agent, 0.5-2 parts initiator, 3-8 parts epoxy resin curing agent and 30-50 parts filler;The multifunctional curing agent includes the following weight parts of raw materials: 10-15 parts vinyl epoxy, 15-20 parts allyl thiocyanate and 5-15 parts allyl methyl disulfide.The concrete anticorrosive coating of the application contains multifunctional curing agent, which has thiocyanate group and disulfide group, the thiocyanate group can effectively inhibit the activity of escherichia coli and staphylococcus aureus, prevent escherichia coli and staphylococcus aureus from corroding the coating, and improve the service life of the anticorrosive coating;Disulfide group can undergo reversible rupture and recombination, with self-repairing ability.

The invention discloses a heterojunction battery adhesive film and a preparation method thereof, and relates to the technical field of heterojunction batteries. The adhesive film is made of the following raw materials by weight: 100 parts of POE resin, 2-5 parts of a cross-linking agent, 10-20 parts of poly (4-methyl-1-pentene), 25-35 parts of a functional copolymer, 3-5 parts of 1,3,5-triacryloyl-s-triazine, 1-3 parts of tetramethyltetravinylcyclotetrasiloxane, 0.3-0.6 parts of an antioxidant, and 0.5-1.2 parts of a silane coupling agent; the functional copolymer includes a structural unit introduced by free radical polymerization of the following monomers: hydroxyethyl methacrylate, N-acryloylmorpholine, 5-methoxy-2-vinyl-1H-pyrrolo[3,2-B]pyridine, and N-(4-cyano-3-trifluoromethylphenyl)methacrylamide. The adhesive film has good bonding performance, good resistance to wet and hot aging and yellowing resistance, and a long service life.

There are provided a photosensitive resin composition which can be applied to either a projection exposure or direct-write exposure machine without fine adjustment of the composition, and can form a resist pattern having an excellent cross-sectional shape in which an undercut in which the bottom portion of the resist pattern is hollowed and omission of the top of the resist pattern are less likely to occur, and a line width of an intermediate portion (central portion) and a deepest portion (bottom portion) in the depth direction of the cross section of the resist pattern is less likely to be larger than a line width of the surface portion (that is, linearity in the depth direction of the resist pattern contour is favorable), and which has excellent insulation reliability and crack resistance reliability, and a dry film using the same, a printed wiring board, and a printed wiring board manufacturing method. The photosensitive resin composition includes an acid-modified vinyl group-containing epoxy resin (A), a photopolymerization initiator (B), a photopolymerization sensitizer including a benzophenone compound (C), and a photopolymerizable compound (D).

The invention discloses a high-strength sealing silica gel material for an automobile seat massage system and a preparation method of the high-strength sealing silica gel material, and belongs to the technical field of sealing materials and automobile parts. The invention provides a high-strength sealing silica gel material. The high-strength sealing silica gel material is prepared from the following raw materials: methyl vinyl silicone rubber, phenyl fluoride / silicone rubber, fumed silica, hydroxyl vinyl silicone oil, tetramethyl tetravinyl cyclotetrasiloxane, polymethylhydrosiloxane, a platinum catalyst and vinyl trimethoxy silane. By adjusting a base rubber system, the strength of the prepared sealing silica gel material is remarkably improved under the condition that the hardness is not improved and the dosage of nano reinforcing filler such as fumed silica is not increased, meanwhile, excellent elasticity and processing performance are kept, and the sealing silica gel material can be suitable for an automobile riding massage system, effectively absorbs pulse stress and is good in stability.

The invention relates to a waterproof breathable film preparation method which comprises the following steps: adding poly-L-lactic acid into a first solvent to obtain a first solution, and adding polypropylene glycol butyral and a pore-foaming agent into the first solution to obtain a first spinning solution; adding poly (beta-hydroxybutyrate) and polyvinyl alcohol into a second solvent to obtain a second solution; octadecanethiol and tetramethyl tetravinyl cyclosiloxane are added into the second solution, and a second spinning solution is obtained; adding polyoxyethylene into a third solvent to obtain a third solution; adding an inorganic non-metallic material and a hydrophobic functional material into the third solution to obtain a third spinning solution; preparing a three-layer nanofiber membrane from the first spinning solution, the second spinning solution and the third spinning solution through an electrostatic spinning method; carrying out cross-linking reaction on the three-layer nanofiber membrane by using ethylene glycol diglycidyl ether steam, and washing by using distilled water to obtain the waterproof breathable membrane. According to the invention, the additive and the polymer are regulated and controlled, so that the structural performance of the film is better.

The invention discloses a low-smoke halogen-free flame-retardant polyolefin sheath environment-friendly cable and a preparation method thereof, and belongs to the technical field of wire and cable materials, the cable comprises a low-smoke halogen-free flame-retardant polyolefin sheath and a cable main body, the low-smoke halogen-free flame-retardant polyolefin sheath is made of a polyolefin sheath material, and the low-smoke halogen-free flame-retardant polyolefin sheath is made of a halogen-free flame-retardant polyolefin sheath material. The polyolefin sheath material is prepared by the following steps: setting the temperature to be 180-200 DEG C, mixing polyolefin resin and an antioxidant, adding vinyl epoxy silicon resin for mixing, adding phosphorus-containing polyamide for continuous mixing, cooling to 105-110 DEG C, and adding a cross-linking agent for mixing to obtain the polyolefin sheath material. Through the molecular-level synergistic flame-retardant effect of the vinyl epoxy silicone resin and the phosphorus-containing polyamide, no additional flame retardant is needed, the addition of toxic flame retardants such as halogen is avoided, and toxic halogen hydride gas is not released. Through synergistic flame retardance of the vinyl epoxy silicone resin and the phosphorus-containing polyamide, the problem of poor flame retardance of the polyolefin sheath is solved.

The invention discloses a preparation process and application of a crosslinkable polyamide elastomer, and belongs to the technical field of nylon elastomer preparation. The process comprises the following steps: S1, by taking butadiene as a raw material, carrying out dimerization reaction to prepare vinyl cyclohexene; s2, carrying out selective epoxidation reaction on vinyl cyclohexene in the presence of an oxidizing agent to obtain a product of single epoxidation on intracyclic double bonds; s3, carrying out hydrogenation on vinyl cyclohexene to obtain cyclohexanol with an ethyl side chain; s4, further dehydrogenating the cyclohexanol with the ethyl side chain in the previous step to obtain ethyl substituted cyclohexanone; the density of the prepared nylon elastomer with the side chain is lower than that of a conventional nylon elastomer with the same carbon number, and the nylon elastomer is more suitable for preparing a low-density foaming material; the chain segment of the prepared nylon elastomer contains crosslinkable sites, and the nylon elastomer can be formed through chemical foaming, so that the application range of the nylon elastomer is greatly expanded, and the problem of low tearing strength is also solved.

The invention relates to a preparation method of a neodymium-iron-boron magnet, and belongs to the technical field of neodymium-iron-boron magnets. The neodymium-iron-boron magnet comprises the following components: acrylic resin, vinyl epoxy resin, modified neodymium-iron-boron magnetic powder, a graphene complex, a curing agent and a lubricant, the neodymium-iron-boron magnet prepared by the method shows excellent stability, mechanical strength and high temperature resistance, so that the overall magnetic performance of the magnet is improved. In addition, the magnet is low in manufacturing cost, excellent in performance, high in cost performance and capable of meeting the requirements of more scenes.

To provide a photosensitive resin composition having excellent adhesion strength with plated copper and showing excellent resolution and adhesiveness to a substrate made of a silicon raw material such as a silicon wafer and to a chip component, and a dry film, a printed wiring board and a method for manufacturing a printed wiring board using the above composition.SOLUTION: The photosensitive resin composition comprises (A) an acid-modified vinyl group-containing epoxy resin, (B) a photopolymerizable compound, (C) a photopolymerization initiator, (D) an inorganic filler, and (E) a silane compound, in which the content of the (D) inorganic filler is 20 to 60 mass% based on a total solid content of the photosensitive resin composition. A dry film, a printed wiring board and a method for manufacturing a printed wiring board using the above composition are also disclosed.SELECTED DRAWING: None

The invention discloses a preparation method of vinyl hydroxyl fluorosilicone oil, and relates to the field of fluorosilicone rubber, which comprises the following steps: by taking trifluoropropyl methyl cyclotrisiloxane and a vinyl ring body as raw materials, adding an end-capping reagent accounting for 0.001-10g of the mass of the raw materials, a cationic catalyst accounting for 0.001-2g of the mass of the raw materials and a reaction aid accounting for 0.002-15g of the mass of the raw materials, washing with water to remove salts, and drying to obtain the vinyl hydroxyl fluorosilicone oil. And finally, reducing pressure to 120 DEG C, and stopping to obtain the vinyl hydroxyl fluorosilicone oil. The preparation method of the vinyl hydroxyl fluorosilicone oil comprises the following steps: by taking trifluoropropyl methyl cyclotrisiloxane (D3F) and a vinyl ring body as raw materials, adding an end-capping reagent, a cationic catalyst and a reaction aid, carrying out ring-opening copolymerization reaction, and controlling the reaction time, temperature and feeding ratio in the reaction process, thereby preparing the vinyl hydroxyl fluorosilicone oil. The process product is high in stability, the cost is reduced by reasonably selecting raw materials and controlling reaction conditions, and the synthesis process and the product performance are stable.