131 results about "Azodicarbonamide" patented technology

The invention discloses a high-weatherability sound insulation wood plastic wallboard and a preparation method thereof, the high-weatherability sound insulation wood plastic wallboard comprises the following raw materials by weight: 30-40 parts of wood flour or plant fiber, 25-35 parts of a sound insulation functional filler, 35-45 parts of high density polyethylene, 2-2.5 parts of maleic anhydride grafted high density polyethylene, 1-1.5 parts of stearic acid, 3-4.5 parts of a weatherability auxiliary agent, and 1-1.5 parts of azodicarbonamide. The problems of cracking, deformation and the like caused by moisture absorption expansion are relieved by optimizing the proportion and compatibility of the wood flour and the plastic, and then the problems of weather resistance and sound insulation of the wallboard outdoors are solved by filling the porous sound absorption material.

The invention belongs to the technical field of sole materials, and particularly relates to a quick-rebound fatigue-resistant sole foaming composite material and a preparation method thereof. According to the invention, the alpha-olefin ethylene copolymer and the modified ethylene-vinyl alcohol copolymer are mixed in an internal mixer, and hydroxyl groups of the modified ethylene-vinyl alcohol copolymer and the alpha-olefin ethylene copolymer form a hydrogen bond cross-linked network under the action of high-temperature shearing; a blend obtained through mixing, high-branching-degree polyolefin, modified nano-zinc oxide I and an auxiliary agent are added into a double-screw extruder for extrusion, the modified nano-zinc oxide is embedded into branching points of the high-branching-degree polyolefin, molecular chain slippage is limited through a pinning effect, the fatigue life of the composite material is prolonged, and the composite material is suitable for large-scale production. The preparation method comprises the following steps: preparing a foaming material, mixing the foaming material with azodicarbonamide, an antioxidant 1010 and the like, injecting the mixture into a supercritical device, effectively improving the density gradient, rebound resilience and mechanical properties through segmented pressure relief, and finally performing hot-pressing shaping to form the quick-rebound fatigue-resistant sole foaming composite material.

The invention relates to the technical field of noise reduction core materials, in particular to a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material and a preparation method thereof, and the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material is prepared from the following raw materials in parts by mass: 3-20 parts of mesoporous ceramic, 75.6-92.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide and 0.4 part of zinc oxide. The mesoporous ceramic / chlorinated polypropylene carbonate foam material has the advantages of being low in density, high in strength, excellent in sound insulation performance, environmentally friendly and the like, the transmission loss at the intermediate frequency of 1000-2000 Hz can reach 34-60 dB, the compression modulus can reach 10.6-26.8 MPa, the compression strength can reach 0.24-0.45 MPa, and the mesoporous ceramic / chlorinated polypropylene carbonate foam material can serve as a sound insulation foam core material to be filled in a building wall and has the advantages of being good in sound insulation performance and the like. Good application prospects are realized in the fields of wall earthquake prevention and sound insulation in the building industry.

The invention discloses an azodicarbonamide ratio fluorescence detection method based on a CoOOH nanosheet loaded Au nano-cluster material, and belongs to the technical field of fluorescence sensing. The CoOOH nanosheet loaded Au nano-cluster material provided by the invention is prepared by carrying out a one-step electrostatic assembly method on AuNCs and a CoOOH nanosheet. The CoOOH nanosheet loaded Au nano-cluster material has the fluorescence property of the AuNCs and the biomimetic catalytic performance of the CoOOH nanosheet at the same time. The invention further provides an azodicarbonamide ratio fluorescence detection method based on the CoOOH nanosheet loaded Au nano-cluster material, and compared with an existing detection method, the azodicarbonamide ratio fluorescence detection method has the remarkable advantages that the method is high in selectivity; by utilizing a ratio fluorescence mechanism, interference caused by environment and instrument fluctuation can be effectively reduced, reliable quantitative analysis of azodicarbonamide is realized, and the method has the advantages of high sensitivity and high credibility and has a wide prospect in the field of fluorescence sensing detection.

The invention discloses an anti-aging and anti-yellowing foaming polyester material and a preparation method thereof, and relates to the technical field of polyester materials. The anti-aging and yellowing-resistant foamed polyester material is prepared from the following raw material components in parts by weight: 3 to 5 parts of anti-ultraviolet SEBS (Styrene-Ethylene-Butylene-Styrene), 3.6 to 7 parts of triethylamine, 4 to 6 parts of flame-retardant and wear-resistant filler, 100 parts of TPEE (Thermoplastic Polyether Ester Ether), 0.9 to 1.1 parts of polymer wax and 0.6 to 0.8 part of foaming agent, the anti-ultraviolet SEBS is obtained by copolymerizing and grafting an unsaturated benzophenone ultraviolet absorbent, SEBS and maleic anhydride; the flame-retardant and wear-resistant filler is obtained by mixing and reacting carboxylated nano silicon dioxide, pentaerythritol and phosphorus oxychloride; the polymer wax adopts EVA (Ethylene Vinyl Acetate) wax; azodicarbonamide is adopted as the foaming agent; the anti-aging and anti-yellowing foaming polyester material disclosed by the invention is relatively good in mechanical property, anti-aging property, flame retardant property and compression resistance.

The invention relates to the technical field of macromolecular polyethylene foam materials, and discloses a chemical foaming agent as well as a preparation method and application thereof. The chemical foaming agent contains azodicarbonamide and ammonium dihydrogen phosphate, and on the basis of the total weight of the chemical foaming agent, the content of the azodicarbonamide is 10-40 wt%, and the content of the ammonium dihydrogen phosphate is 60-90 wt%. According to the chemical foaming agent, the thermal decomposition initial temperature of azodicarbonamide is promoted to be reduced through ammonium dihydrogen phosphate, the decomposition process is controllable, foam pore distribution is more uniform, and foaming gas released in the polyethylene rotational molding foaming forming process is mainly CO2, so that the chemical foaming agent is more environment-friendly and energy-saving when being used in the polyethylene rotational molding foaming forming process.

The invention relates to the technical field of shoe materials, in particular to a bio-based EVA-containing composite shoe material and a preparation method thereof, and the bio-based EVA-containing composite shoe material is prepared from the following raw materials in parts by weight: a bio-based EVA polymer, bio-based TPU, a cross-linking agent, a compatilizer, a nucleating agent, filler, a foaming agent, a plasticizer, a flexible component, a biodegradation accelerant, a non-polyolefin elastomer and maleic anhydride grafted polyethylene wax. Wherein the compatilizer can be ethylene-vinyl alcohol and the like; the nucleating agent can be nanoscale talcum powder and the like; the filler can be ethyl cellulose and the like; the foaming agent is an azodicarbonamide foaming agent; the biodegradation accelerant is prepared from immobilized lipase, a tannic acid-Fe < 3 + > complex and surface carboxylated TiO2. The preparation method comprises two steps of mixing granulation and supercritical foaming. The composite shoe material provided by the invention has good biodegradability, can reduce environmental pollution, and maintains excellent physical and mechanical properties at the same time.

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The invention relates to the technical field of macromolecular polyethylene foaming materials, and discloses a gel network supported chemical foaming agent as well as a preparation method and application thereof. The gel network supported chemical foaming agent contains a gel network carrier and azodicarbonamide supported on the gel network carrier, and based on the total weight of the gel network supported chemical foaming agent, the content of the azodicarbonamide is 10-40 wt%, and the content of the gel network carrier is 60-90 wt%. The gel network supported chemical foaming agent has the advantages of lower initial foaming temperature, controllable decomposition process, smaller cell size and better application value.

The invention relates to the technical field of sound insulation materials, in particular to flame-retardant epoxy resin composite diatomite sound insulation cotton and a preparation method thereof. The flame-retardant epoxy resin composite diatomite sound insulation cotton is prepared from epoxy resin, diatomite, a composite flame retardant, a coupling agent, a curing agent, a diluent, a foaming agent and a charring agent. The composite flame retardant at least comprises ammonium polyphosphate and melamine; the coupling agent is a silane coupling agent or a titanate coupling agent; the curing agent is methyl tetrahydrophthalic anhydride; the diluent is n-butyl glycidyl ether; the foaming agent is azodicarbonamide; the charring agent is pentaerythritol. By optimizing the diatomite modification process and combining physical dispersion and chemical modification means, the compatibility of the diatomite and the epoxy resin is greatly improved, the pain point of filler agglomeration in the traditional process is thoroughly solved, the porous sound insulation potential of the diatomite is fully released, and the sound absorption and sound insulation performance of the material is qualitatively improved.

The invention relates to the technical field of foaming materials, in particular to a high-damping EVA / EPDM composite foaming material and a preparation method thereof. The high-damping EVA / EPDM composite foam material is prepared from the following raw materials in parts by weight: 150 to 80 parts of ethylene-vinyl acetate copolymer, 20 to 50 parts of ethylene propylene diene monomer, 3 to 5 parts of azodicarbonamide, 1 to 3 parts of dicumyl peroxide, 10 to 12 parts of compound filler, 6 to 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 2 to 4 parts of hydroxyl-terminated polybutadiene and 1 to 4 parts of triallyl isocyanurate, the compound filler is formed by compounding silicon dioxide microspheres, graphene aerogel microspheres and modified barium titanate nanoparticles according to the mass ratio of 1: (1.5-1.7): (1.5-1.8); the high-damping EVA / EPDM composite foam material prepared by the invention not only has better high-damping and low-resilience properties, but also has excellent tensile strength, and the quality of the high-damping EVA / EPDM composite foam material is effectively ensured.

The invention provides battery pack heat preservation foam with low compression strength. The problems that existing polyethylene foam is high in compression strength, insufficient in flame retardant property and the like in heat insulation, buffering and protection application of a new energy automobile battery pack are solved. The foam comprises the following components in parts by mass: 50-80 parts of low-density polyethylene, 10-20 parts of linear low-density polyethylene and 20-30 parts of ethylene-vinyl acetate copolymer as a resin matrix, 8-12 parts of azodicarbonamide, 1-3 parts of sodium carbonate and 1-3 parts of 4, 4 '-oxybisbenzenesulfonyl hydrazide are used as foaming agents; and 5-10 parts of a bromine-antimony flame retardant, 1-2 parts of a metallic soap lubricant and 1-3 parts of an antioxidant. The flame retardant grade of the foam reaches UL94HF-1, the compression strength is lower than 10kPa under 30% strain, and the aperture ratio of the foam is greater than or equal to 85%. The preparation method comprises the steps of internal mixing granulation, extrusion into sheets, irradiation crosslinking, heating foaming, physical rolling hole breaking and the like, and low compression strength, high aperture ratio and excellent flame retardance are realized by optimizing a resin blending system, a multi-stage foaming process and a physical rolling technology.

The invention relates to the technical field of high polymer materials, and particularly discloses a styrene-methyl methacrylate copolymer foam material and a preparation method thereof. The styrene-methyl methacrylate copolymer foaming material is prepared from the following raw materials in parts by weight: 50 to 80 parts of styrene-methyl methacrylate copolymer, 1 to 3 parts of azodicarbonamide and 0.5 to 1 part of polylactic acid microspheres. The compression strength and the tensile strength of the styrene-methyl methacrylate copolymer foaming material obtained by the invention can reach 0.29 Mpa and 0.39 Mpa at most, and the mechanical property of the styrene-methyl methacrylate copolymer foaming material is improved.

The invention relates to the technical field of polymer foam materials, and discloses a light EVA foam material based on intermittent foaming heating and a preparation method thereof. The ethylene-vinyl acetate copolymer adhesive is prepared from the following raw materials: an ethylene-vinyl acetate copolymer, a maleic anhydride grafted ethylene-vinyl acetate copolymer, azodicarbonamide, basic zinc carbonate, triallyl isocyanurate, stearic acid and dicumyl peroxide. During preparation, a double-machine-position stepped heating and mechanical mode locking transfer process is adopted. The first-stage heating is initiated by dicumyl peroxide to construct a covalent cross-linked skeleton; in the second-stage foaming heating process, basic zinc carbonate is heated and decomposed, and anhydride groups are promoted to be hydrolyzed and combined with released zinc oxide in situ to form ionic crosslinking. A double-order cross-linked network formed by covalent bonds and ionic bonds can absorb bubble expansion stress and stabilize an internal microstructure. According to the invention, the occurrence rate of cell merging and cracking under the condition of low density is reduced, and the foaming material with low apparent density and small compression set rate is obtained.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

The invention discloses high-heat-insulation ceramic silica gel foam, and relates to the technical field of high-temperature-resistant silica gel. The high-heat-insulation ceramic silica gel foam is prepared from the following components in parts by mass: 100 parts of methyl vinyl silicone rubber, 15 to 40 parts of ceramic silicon resin, 15 to 25 parts of a flame retardant, 3 to 15 parts of fumed silica, 0.5 to 5 parts of hydrogen-containing silicone oil, 0.1 to 2 parts of a platinum catalyst, 2 to 10 parts of an azodicarbonamide foaming agent, 1 to 8 parts of a ceramic accelerant, 0.5 to 3 parts of a heat-resistant additive and 5 to 8 parts of reinforcing filler. Compared with the prior art, the material disclosed by the invention can quickly form a compact ceramic layer at a high temperature, can more effectively block heat transfer, avoids sharp reduction of mechanical properties or structural damage of the material in a high-temperature environment, and is more excellent in high-temperature use stability.

The application relates to the technical field of cable material manufacturing, and discloses a light-weight flexible wear-resistant electrical equipment connecting cable, a sheath of the connecting cable being made of raw materials including the following: polyester type thermoplastic polyurethane elastomer, styrene-acrylonitrile copolymer, maleic anhydride grafted polyolefin elastomer, blocked isophorone diisocyanate, wear-resistant premixed solution containing a catalyst, slow-release foaming master batch and functional additives; wherein the wear-resistant premixed solution containing the catalyst contains hydroxyl-terminated polydimethylsiloxane and a bismuth octoate catalyst, the slow-release foaming master batch contains modified azodicarbonamide foaming agent and carrier resin, and the functional additives contain antioxidants and carbodiimide hydrolysis stabilizers. According to the application, the hydroxyl-terminated polydimethylsiloxane containing the catalyst and the blocked isocyanate are introduced into the polyurethane matrix in cooperation through a reaction extrusion process, the isocyanate groups are unblocked at high temperature, and the organic silicon chain segment is chemically bonded with the matrix resin.

The application relates to the technical field of high polymer materials, and discloses an antistatic shoe sole material and a preparation method thereof, which is made of ethylene-vinyl acetate copolymer, ethylene-propylene rubber, cationic POE-carbon nanotube hybrid master batch, dicumyl peroxide, azodicarbonamide and zinc oxide. The cationic POE-carbon nanotube hybrid master batch is prepared by the following steps: pre-compounding alkenyl epoxy functionalized imidazole didodecyl double cationic connecting agent with acidized carbon nanotubes, and then melt grafting the ethylene-octene copolymer thermoplastic elastomer by one-step method; and the epoxy group further reacts with the carboxyl group on the surface of the carbon nanotubes. The application can construct an electronic-ion synergistic conductive network, has low addition amount, long-term antistatic property and high resilience.

The invention relates to a composite sponge for an automobile engine hood and a preparation method of the composite sponge. The composite sponge is prepared from the following components in parts by weight: 100 to 130 parts of polyurethane prepolymer, 20 to 30 parts of bismaleimide and furyl polyether copolymer, 12 to 20 parts of 6-(diphenoxy phosphine)-6H-dibenzoxphosphine or a derivative thereof, 12 to 20 parts of ammonium polyphosphate, 8 to 15 parts of nano silicon dioxide or montmorillonite, 12 to 20 parts of self-healing microcapsule, 1 to 3 parts of azodicarbonamide and 1 to 2 parts of zinc stearate. And 5 to 8 parts of a diisocyanate crosslinking agent. Wherein the self-healing microcapsule takes an aromatic ester or epoxy prepolymer as a core material and a urea formaldehyde condensate as a shell material, and the particle size is 20-80 microns. All the components are compounded under a specific process path to form a foam network structure with high-temperature shape memory and self-healing functions and efficient flame retardance, and the foam network structure is suitable for thermal protection application of an automobile engine compartment under complex working conditions.

The invention discloses a foamed low-dielectric low-dielectric-loss continuous long glass fiber reinforced polypropylene composite material, and relates to the field of long glass fiber reinforced polypropylene composite materials and preparation thereof, the material is prepared from the following components by mass: 20-60 parts of polypropylene resin; 20 to 60 parts of continuous glass fiber; 15 to 20 parts of homopolymerized PP (polypropylene); 5 to 12 parts of hollow glass beads; 3 to 7 parts of azodicarbonamide; 6 to 12 parts of mesoporous silica; 3 to 6 parts of graphene aerogel; 0.5 to 1 part of fluoride; 0.1 to 1.5 parts of a compatilizer; 0.1 to 2 parts of an antioxidant; and 1-2 parts of a lubricant. According to the invention, through combination of multiple components, introduction of gas micropores to reduce the effective dielectric constant of the material and introduction of the low-dielectric filler, the urgent demands of the fields of high-frequency communication, millimeter wave radar and the like on low-dielectric-constant and low-dielectric-loss materials are met.

The invention belongs to the field of polyolefin foaming materials, and particularly relates to a flame-retardant chemical crosslinking polyolefin foaming material with high foaming ratio. According to the chemical cross-linked polyolefin foaming material provided by the invention, the brominated flame retardant and the antimony trioxide / wollastonite composite powder with proper parameters are added as flame retardants, the proportion of the brominated flame retardant and the antimony trioxide / wollastonite composite powder is regulated and controlled, and meanwhile, the brominated flame retardant and the antimony trioxide / wollastonite composite powder cooperate with other components such as the assistant cross-linking agent and the antioxidant; the polyolefin foaming material with smooth appearance, high foaming ratio and excellent flame retardant property can be prepared, the residual amount of the foaming agent azodicarbonamide does not exceed the standard, and the requirement is met.

The application discloses a preparation method of a liquid crystal polymer diaphragm and the liquid crystal polymer diaphragm. The preparation method comprises the following steps: providing a soluble liquid crystal polymer, dissolving the soluble liquid crystal polymer in a first solvent, stirring and mixing to obtain a first mixed solution. Fillers are added into the first mixed solution, and dispersion treatment and defoaming treatment are performed to obtain a slurry. The fillers comprise at least one of paraffin oil, aluminum triacetylacetone powder, azodicarbonamide, calcium carbonate powder, silica powder, sodium bicarbonate powder and starch powder. A substrate is provided, the slurry is coated on the substrate, and a wet film is formed on the substrate. The wet film is subjected to drying and curing treatment, and the fillers are removed to obtain a first film body with a porous structure. The first film body is peeled off from the substrate to obtain the liquid crystal polymer diaphragm. In the preparation process of the liquid crystal polymer diaphragm, the fillers are added, the fillers are used for occupying positions in the wet film and are removed, the porous structure in the liquid crystal polymer diaphragm is increased, and the porosity is improved.

The invention relates to the field of foamed plastic preparation, in particular to an environment-friendly noise-reducing pmi foamed plastic preparation method which comprises the following steps: 1, mixing a polybenzimidazole monomer, a catalyst and a polar solvent according to an optimal ratio of 4: 1: 2, and carrying out polymerization reaction under the conditions of the temperature of 180-250 DEG C and the pressure of 0.5-1.5 MPa to form a PMI resin prepolymer, in the reaction process, a proper amount of a noise reduction auxiliary agent is added at 200 DEG C to promote the noise reduction effect of the foam material. The environment-friendly raw materials are adopted, the specific catalyst (sodium chloride, ammonium chloride and the like), the foaming agent (azodicarbonamide) and the surfactant (lauryl sodium sulfate) are utilized, the raw materials show the characteristics of low toxicity and harmlessness in production and final products, the modern environment-friendly requirement is met, the influence on the environment is reduced, and the environment-friendly and environment-friendly foaming agent is suitable for industrial production. Therefore, the problem that a PMI foam material with excellent noise reduction performance is difficult to prepare by an existing noise reduction pmi foam plastic preparation method is solved.

The utility model relates to the technical field of stirring devices, and discloses a mixing stirrer for azodicarbonamide, which comprises a large helical ribbon and a small helical ribbon, the head end of the large helical ribbon and the head end of the small helical ribbon are respectively and fixedly connected to one side of a rotating shaft through a first connecting pipe and a second connecting pipe; the tail ends of the large helical ribbon and the small helical ribbon are fixedly connected to the other side of the rotating shaft through a third connecting pipe and a fourth connecting pipe correspondingly, one end of the rotating shaft is rotationally connected to one end of a water inlet main pipeline in a sealed mode, and the other end of the water inlet main pipeline is fixedly connected with the output end of a circulating water cooling mechanism; the other end of the rotating shaft penetrates out of the outer side of the box body and is rotationally connected with one end of a water outlet main pipeline in a sealed mode, the other end of the water outlet main pipeline is fixedly connected with the input end of a circulating water cooling mechanism, a U-shaped water tank shell is fixedly connected to the bottom of the box body, and a water inlet branch pipeline is fixedly connected to one side of the top end of the U-shaped water tank shell; the diagonal sides of the top end of the U-shaped water tank shell are fixedly connected with water outlet branch pipelines, and the material cooling function is achieved through a water circulation mechanism.

The invention discloses a hybrid antistatic EPDM (Ethylene-Propylene-Diene Monomer) composite foam material and a preparation method thereof, and belongs to the field of polymer composite foam materials. The hybrid antistatic EPDM composite foam material comprises the following components in parts by weight: 80-90 parts of EPDM particles, 10-20 parts of EVA particles, 7-12 parts of an antistatic hybrid composite filler, 2 parts of zinc oxide, 2 parts of stearic acid, 7 parts of a foaming agent azodicarbonamide, 0.5 part of a cross-linking agent dicumyl peroxide and 2-4 parts of talcum powder. Wherein the antistatic hybrid composite filler is obtained by firstly preparing acidified carbon fiber loaded zirconium dioxide from acidified carbon fiber and zirconium dioxide and then compounding and combining with graphene oxide prepared by utilizing an improved Hummers method. The hybrid antistatic EPDM composite foaming material is prepared from the antistatic hybrid composite filler and EPDM by adopting a double-roller open milling and mold pressing foaming method, the formula is scientific and reasonable, and the technological process is simple and practical; the prepared hybrid antistatic filler is good in compatibility with a matrix, uniform in dispersion and excellent in antistatic effect, and has excellent mechanical properties.

The application belongs to the technical field of polyvinyl chloride foam material preparation, and particularly relates to a polyvinyl chloride foam material for offshore operation and a preparation method thereof. The polyvinyl chloride foam material for offshore operation comprises polyvinyl chloride resin as a base resin, silane-modified aluminum borate nanometer whisker, 1-(9,10-epoxy octadecanoyloxy)-3-(2-methylprop-2-enoyloxy)propan-2-ol and oleic acid-modified Mg-Al-Zn ternary intercalation hydrotalcite as modified raw materials, 4,4'-diphenyl methane diisocyanate and 4,4'-dicyclohexyl methane diisocyanate are compounded to construct a soft and hard synergistic crosslinking network, azodicarbonamide, benzene-1,3-disulfonyl hydrazide and zinc oxide are compounded to form a foaming agent to realize gradient nucleation foaming, and a heat stabilizer, a light stabilizer and an antioxidant are further added. As a result, the synergistic effect between the raw materials enables the polyvinyl chloride foam material to have excellent salt mist resistance and impact resistance.

The invention discloses a mechanical fastening belt and a manufacturing method thereof, and relates to the technical field of mechanical fastening belts. The hook surface is compounded and fixed on the surface of one side of one end in the length direction of the base film through thermal forming; the base film is a modified base film added with a composite foaming system, and the composite foaming system is formed by compounding a physical foaming agent and a chemical foaming agent; the physical foaming agent is hollow glass beads, and the chemical foaming agent is azodicarbonamide. A composite foaming system formed by compounding hollow glass beads and azodicarbonamide is adopted in the base film, and the hook surface is compounded and fixed on the surface of one side of one end of the length direction of the base film through thermal forming, so that the uniformity of an internal bubble structure of the base film is improved; the problems that a traditional mechanical fastening belt is too high in gram weight, high in material cost and poor in use flexibility due to a single foaming system of a base film, and the compounding firmness of a hook face and the base film is insufficient can be solved.

The invention discloses a preparation method of a liquid crystal polymer film and the liquid crystal polymer film, and provides a soluble liquid crystal polymer, and the soluble liquid crystal polymer is dissolved in a first solvent to obtain a first mixed solution; adding a foaming agent, a dispersing agent and a foaming promoter into the first mixed solution, and carrying out dispersion treatment and defoaming treatment to obtain precursor slurry; the foaming agent is prepared from at least one of azodicarbonamide, p, p '-oxybisbenzenesulfonyl hydrazide and N, N'-dinitroso pentamethylene tetramine. Providing a substrate, coating the precursor slurry on the substrate, and forming a wet film on the substrate; and carrying out heat treatment on the wet film to obtain a first film body. And separating the first film body from the substrate to obtain the liquid crystal polymer film. The foaming agent, the dispersing agent and the foaming promoter have a synergistic effect to jointly construct a stable and efficient foaming system. The prepared liquid crystal polymer film has low dielectric constant and dielectric loss, and also has good mechanical properties.

The invention relates to a preparation method of an anti-aging high-resilience elastic material for a foaming process, and belongs to the technical field of foaming elastic materials. The preparation method comprises the following steps: putting an ethylene-vinyl acetate copolymer, a thermoplastic polyurethane elastomer, dioctyl phthalate, an anti-aging agent, a lubricant, a triazole ferrocene synergistic aid, an azodicarbonamide foaming agent and a dicumyl peroxide cross-linking agent into an internal mixer for internal mixing, and performing open mixing in an open mill to obtain a rubber sheet; putting the rubber sheet into a mold, putting the mold into a press vulcanizer, and carrying out vulcanization foaming to obtain an elastic material; the triazole ferrocene synergistic auxiliary agent is prepared from 3-vinyl-1, 2, 4-triazole, 1, 1-bis (dimethylsilyl) iron, anhydrous toluene and a chloroplatinic acid toluene solution, and the triazole ferrocene synergistic auxiliary agent is prepared from the following raw materials: 1, 1-bis (dimethylsilyl) iron, anhydrous toluene and a chloroplatinic acid toluene solution. The elastic material prepared by the invention has the advantages of excellent aging resistance, high compression resilience rate and good durability, and can maintain stable resilience performance in a long-term use process.

The invention discloses a preparation process of a corrosion-resistant EVA (Ethylene Vinyl Acetate) foamed sheet, and belongs to the technical field of EVA foamed materials. The high-temperature-resistant EVA rubber material is prepared from the following components: 55 to 65 parts of EVA, 5 to 15 parts of thermoplastic polyamide elastomer, 10 to 25 parts of ethylene propylene diene monomer, 0 to 15 parts of ethylene-octylene copolymer, 0 to 8 parts of butadiene rubber, 0 to 8 parts of butyl rubber, 8 parts of talcum powder, 2 parts of zinc oxide, 0.8 part of dicumyl peroxide, 3 parts of azodicarbonamide and 7.5 to 15 parts of glass fiber. In actual application, in a relatively extreme environment such as a cold use environment, an EVA foaming material has the defects of high hardness and poor elasticity; and on the other hand, the EVA foaming material is easy to wear and corrode even at normal temperature, so that the application range of the EVA foaming material is greatly limited. The invention discloses the EVA foaming material with excellent flexibility, high elasticity and high corrosion resistance, so that the application environment of the EVA foaming material is expanded. Therefore, the technical problem of how to improve the mechanical property of the EVA foam material is solved.