311results about How to "Improve aging resistance" patented technology

The invention discloses a wear-resistant and high-temperature-resistant synchronous belt and a preparation method thereof. The wear-resistant and high-temperature-resistant synchronous belt comprises a synchronous belt framework and a synchronous belt rubber sheet, the synchronous belt rubber sheet is prepared from the following raw materials: a fluorosilicone thermoplastic polyurethane elastomer containing a benzene ring structure, an amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, epoxidized natural rubber, molybdenum sulfide nanosheets, reinforced fibers, bis (1-vinyl imidazole-2-) ketone, 2-acrylamido-2-methylpropanesulfonic acid, 4, 4 '-difluoro-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1 The high-temperature-resistant rubber is prepared from 2, 6-hydroxy-2-cyanobenzothiazole, bis (3-aminophenyl) 3, 5-bis (trifluoromethyl) phenylphosphine oxide, a catalyst, a coupling agent, a vulcanizing agent, an anti-aging agent, a scorch retarder and a lubricating agent. The synchronous belt is good in mechanical property, sufficient in high-temperature resistance and cold resistance, good in wear resistance and excellent in aging resistance and flame retardance.

The invention relates to the technical field of power cables, and provides a medium-voltage fireproof cable, which comprises a conductor, and an insulating layer, an armor layer and a sheath layer which are sequentially arranged outside the conductor, the insulating layer comprises the following components in parts by weight: 70-80 parts of polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 1-3 parts of an antioxidant; the sheath layer comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 8-16 parts of a flame retardant, 1-2 parts of a plasticizer, 1-3 parts of an antioxidant and 5-10 parts of filler; the filler comprises silicon dioxide, inorganic fibers and tetrapod-like zinc oxide whiskers. According to the technical scheme, the problem that the strength and the aging resistance of the cable in the prior art are poor is solved.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention discloses a preparation method of a bio-based epoxy resin anticorrosive coating, and relates to a preparation method of a bio-based epoxy resin coating. The bio-based epoxy resin anticorrosive paint mainly comprises an anticorrosive filler COFs-AA, bio-based epoxy resin and a curing agent. Wherein the anticorrosive filler COFs-AA is prepared from a two-dimensional covalent organic framework COFs and a bio-based material arachidonic acid (AA) through a covalent condensation reaction; the bio-based epoxy resin is prepared by epoxidizing a bio-based material galangin serving as a raw material through epichlorohydrin, and the curing agent is a common curing agent for epoxy resin. The bio-based epoxy resin anticorrosive paint is compounded by taking biomass as a basic component, and has the characteristics of greenness, environmental protection, no toxicity, good hydrophobicity and good corrosion resistance; the bio-based epoxy resin anticorrosive paint can be applied to the field of corrosion protection of materials such as various metals and woodware.

The invention provides a flame-retardant polyolefin composition as well as a preparation method and application thereof, and the flame-retardant polyolefin composition comprises the following components in parts by weight: 13-22 parts of an ethylene-vinyl acetate copolymer, 1.5-8.5 parts of linear low density polyethylene, 8-17 parts of a polyolefin elastomer, 35-55 parts of a flame retardant and 0.5-2.5 parts of an antioxidant. The antioxidant comprises a main antioxidant and an auxiliary antioxidant; the main antioxidant comprises a hindered phenol antioxidant and an amine antioxidant; and the auxiliary antioxidant comprises a thioester antioxidant and / or a phosphite ester antioxidant. According to the flame-retardant polyolefin composition disclosed by the invention, the ethylene-vinyl acetate copolymer, the linear low-density polyethylene and the polyolefin elastomer are compounded according to a specific content, and meanwhile, the antioxidant with specific composition is matched, so that the flame-retardant polyolefin composition is good in heat resistance, aging resistance and precipitation resistance; meanwhile, the mechanical property is good.

The invention relates to a flame-retardant rubber and plastic thermal insulation material and a preparation method thereof, and belongs to the technical field of high polymer materials. The flame-retardant rubber-plastic thermal insulation material comprises the following components in parts by weight: 50-75 parts of nitrile rubber, 20-45 parts of PVC resin, 10-15 parts of a plasticizer, 1-10 parts of a foaming agent, 1-5 parts of a foaming promoter, 10-40 parts of a composite flame retardant and 2-6 parts of a modified anti-aging agent, cyclohexanehexol phosphate in the composite flame retardant is heated and dehydrated into phosphoric acid, a barrier layer is formed to inhibit release of combustible materials, and dimethylallylamine combusts to absorb heat and cooperates with phosphorus-oxygen double bonds for flame retardance; a pre-product in the modified anti-aging agent reacts with a free radical of a rubber molecular chain, so that the heat resistance and the aging resistance of the material are improved, a maleimide group enhances an intermolecular acting force, the rigidity and the heat resistance of the molecular chain are improved, and material aging caused by high temperature is reduced; the flame-retardant rubber and plastic thermal insulation material prepared by the invention not only has an excellent anti-aging effect, but also has good flame retardance.

The invention discloses an injection molding method of an anti-aging simulation plant. The injection molding method comprises the following steps: preparing raw materials; uniformly mixing the raw materials according to a set material proportioning model so as to obtain anti-aging proportioning raw materials exceeding a preset threshold value; according to the shape and the size of the simulation plant, through a system integrated with an intelligent design engine, design data are extracted, and a design mold is generated; the proportioned raw materials are heated in a heating cylinder of an injection molding machine to be in a molten state, and molten plastic is obtained; the molds are firmly clamped together; injecting the molten plastic into the cavity of a mold under a predetermined pressure; a preset pressure of a preset time is kept in the cavity; cooling and solidifying the material in the mold to form the shape of the mold; and opening the mold to obtain the formed simulation plant. According to the technical scheme, the service life of the anti-aging simulation plant is prolonged, and the safety of the anti-aging simulation plant is improved by optimizing the raw material ratio, accurately controlling the injection molding process and other key steps.

The invention relates to the technical field of coatings, and provides a nano anti-corrosion waterproof coating capable of resisting high and low temperatures and acid and alkali, which is prepared from the following raw materials in parts by mass: 30 to 40 parts of pure acrylic emulsion, 10 to 20 parts of modified nano silicon dioxide, 2 to 4 parts of nano titanium dioxide, 3 to 6 parts of nano zinc oxide, 2 to 4.4 parts of auxiliaries and 5 to 9 parts of water, the modifier comprises dibasic ester and / or dihydric alcohol. According to the technical scheme, the problem that the performance of the nano coating is low due to the fact that the nano particles are easy to agglomerate and are not uniformly dispersed in the base material in the prior art is solved.

The present invention belongs to the technical field of alkyd resin coatings, and discloses an alkyd external enamel and a preparation method thereof. The present invention adopts a bio-based high flash point alkyd resin as a base resin, adopts nano titanium dioxide, nano zinc oxide, nano aluminum oxide and micron aluminum oxide with different particle size distributions for compounding, and adds isocyanate silane and glycerol ether silane in the system. After grinding, the pigments and fillers can be modified to improve the filling and modification effect of the pigments and fillers. At the same time, the active groups such as isocyanate groups, epoxy groups, and hydroxyl groups in the coupling agent can interact with the alkyd resin to improve the compatibility of the pigments and fillers with the alkyd resin, and give the coating film excellent adhesion to the inorganic substrate. With a high flash point solvent, a bio-based coating with high flash point, high adhesion, high aging resistance and high wear resistance can be prepared to meet the use requirements of the external enamel. The alkyd external enamel is environmentally friendly and safe, and can be stored and transported according to general chemicals.

The invention relates to the technical field of epoxy splicing adhesives, in particular to a high-performance prefabricated part epoxy splicing adhesive and a preparation method thereof.The epoxy splicing adhesive comprises a component A and a component B. The component A is prepared from 3%-8% of polyether polyol, 2%-4% of hydrophobic fumed silica, 0.1%-1% of a silane coupling agent, 0.01%-0.5% of a defoaming agent, 50%-75% of modified quartz sand, 1%-5% of color paste and the balance epoxy resin; the modified quartz sand is prepared by grafting an amino silane coupling agent on the surface of quartz sand, then reacting with polychlorophosphazene, and then reacting with glycidol; the component B comprises the following components in percentage by weight: 0.2-4% of color paste, 1-5% of hydrophobic fumed silica, 0.1-1% of an amino silane coupling agent, 10-25% of 0.5 mm quartz sand, 40-60% of 0.1 mm quartz sand and the balance of a modified amine curing agent; the preparation method has the advantage that the mechanical strength and the bonding strength of the epoxy splicing adhesive are improved.

The invention discloses a high-temperature-resistant adhesive tape and a preparation method thereof, and belongs to the technical field of adhesive tape preparation. The adhesive tape is composed of a composite adhesive and a composite polyester film, and the composite adhesive is composed of hydroxyl polydimethylsiloxane, boric acid, 2, 2-bis [4-(4-aminophenoxy) phenyl] propane and 4, 4-bis (4-aminophenoxy) phenyl] propane. The composite polyester film is prepared from polyethylene glycol terephthalate, 1-allylimidazole, 2-bromobutane, potassium hexafluorophosphate, methacryloyloxyethyl trimethyl ammonium chloride and nano silicon dioxide, and the composite polyester film is prepared from polyethylene glycol terephthalate, 1-allylimidazole, 2-bromobutane, potassium hexafluorophosphate, methacryloyloxyethyl trimethyl ammonium chloride and nano silicon dioxide. The adhesive tape prepared by the method has excellent viscosity, high temperature resistance, aging resistance and antistatic property.

The invention provides an antistatic polypropylene material as well as a preparation method and application thereof, and belongs to the technical field of polypropylene materials. The preparation method comprises the following steps: modifying graphene, preparing a graphene / titanium dioxide compound, reacting, and performing extrusion molding. The method comprises the following reaction steps: putting a functionalized graphene / titanium dioxide compound into a reaction container, introducing N, N-dimethylformamide, uniformly stirring, adding modified graphene, dicyclohexylcarbodiimide and 4-dimethylaminopyridine, heating to 73-77 DEG C, carrying out ultrasonic treatment, and after ultrasonic treatment is finished, carrying out heat preservation stirring for 1.8-2.2 hours to obtain the graphene / titanium dioxide composite material. Then heating to 116-123 DEG C at the speed of 1.7-2.3 DEG C / min, stirring for 1.8-2.2 hours while keeping the temperature, after stirring is finished, filtering, washing, freeze-drying, and naturally recovering to room temperature, so as to obtain a graphene-graphene / titanium dioxide compound; the antistatic polypropylene material prepared by the invention is good in antistatic property, excellent in mechanical property and good in aging resistance.

The utility model relates to a deep-sea mining delivery pipe, and belongs to the technical field of deep-sea mining delivery pipes. Comprising a conveying pipe body, the conveying pipe body comprises an armored steel sleeve, an inner rubber sealing layer, a first pressure-bearing layer, a spiral steel wire framework layer, a second pressure-bearing layer, a cable and optical cable layer and an outer protection layer which are sequentially arranged from inside to outside, one end of the conveying pipe body is provided with a fixed flange connector connected with a relay station, and the other end of the conveying pipe body is provided with a clamp connector connected with a mine collecting machine. The nitrile rubber is used as the inner rubber sealing layer, and the chloroprene rubber and the natural rubber are used as the outer protective layer, so that the oil resistance, seawater corrosion resistance and aging resistance of the conveying pipe are improved, and the service life of the conveying pipe is prolonged; sS316 stainless steel is used as the armored steel sleeve, so that the hardness and the wear resistance of the conveying pipe can be improved; the first pressure-bearing layer, the spiral steel wire framework layer and the second pressure-bearing layer play a supporting role and bear radial pressure, so that the compression resistance of the conveying pipe is improved, and the service life is prolonged.

The invention discloses a polyester-polyurethane composite coating as well as a preparation method and application thereof, and relates to the technical field of coatings. The polyester-polyurethane composite coating comprises polyester resin, hydroxy acrylic resin, a polyester resin curing agent, an acrylic resin curing agent, a texturing agent and an auxiliary agent, and the mass of the hydroxy acrylic resin is 5-20% of the mass of the polyester resin. The polyester-polyurethane composite coating provided by the invention is used as base powder of a vacuum plating process, a formed coating has an obvious grain effect, can be matched with metal powder to present an excellent silver flashing effect after vacuum plating, also has good flexibility, corrosion resistance, hardness and other properties, is suitable for the vacuum plating process, and has a good application prospect. The coating can be further matched with a vacuum electroplating process provided by the invention to achieve a better effect, and is suitable for vacuum electroplating surface coating of the hub.

The invention relates to the technical field of polyvinyl chloride, and discloses a wear-resistant and aging-resistant PVC (polyvinyl chloride) material.The wear-resistant and aging-resistant PVC material is characterized in that glycidyl acrylate grafted ABS is used as a compatilizer, carboxyl-terminated nitrile rubber is used as a flexibilizer and a wear-resistant modifier, and polyvinyl chloride is subjected to filling modification; the modified polyvinyl chloride can react with terminal carboxyl groups of nitrile rubber, so that nitrile rubber and polyvinyl chloride have better compatibility, and the notch impact strength and wear resistance of the PVC material are improved. The hindered phenol-lanthanum complex stabilizer contains a hindered phenol structure which can capture free radicals generated in the oxidation process, inhibit free radical chain reaction and overcome decomposition of polyvinyl chloride; meanwhile, lanthanum ions in the complex can react with hydrogen chloride generated by thermal decomposition of polyvinyl chloride, so that the phenomenon that the polyvinyl chloride is degraded by the hydrogen chloride is reduced.

The invention mainly relates to the field of organosilicone chemistry, the field of daily chemicals and the field of high polymer materials, in particular to an organosilicone elastomer and a preparation method thereof. Comprising the following components: a side chain, divinyl terminated polysiloxane, hyaluronic acid modified single-ended vinyl polysiloxane, phenyl modified vinyl polysiloxane, a carrier fluid and a catalyst for hydrosilylation, a phenyl chain segment is introduced on the basis of a conventional elastomer net structure, so that the compatibility with various personal care components and active components is improved. In addition, hyaluronic acid, which is an excellent natural moisturizing factor, is introduced to improve the moisturizing performance of the organic silicon elastomer, so that the aim of moisturizing the skin is fulfilled. Meanwhile, the preparation method is simple, and mass production is easy to realize.

The present application relates to a green and low-carbon functional inorganic rock coating artistic effect paint and a preparation method thereof, belonging to the field of coating technology. The present invention modifies the waterborne epoxy resin emulsion and introduces amino calcium carbonate and modified carboxymethyl cellulose at the same time. The multi-components work together to effectively improve the adhesion level and obtain good salt spray resistance and aging resistance.

The invention provides a wood lacquer coating composition, and relates to the technical field of wood lacquer. The wood lacquer coating composition consists of a component A and a component B according to a molar equivalence ratio of 1: (1-1.1), the component A comprises the following raw material components: composite aspartic ester resin consisting of first aspartic ester resin and second aspartic ester resin; the weight of the second aspartic ester resin accounts for 10-40% of the weight of the composite aspartic ester resin; the first aspartic acid ester resin is bifunctional aspartic acid ester, the second aspartic acid ester resin is monofunctional aspartic acid ester, and the first aspartic acid ester resin and the second aspartic acid ester resin are both low in viscosity; and the component B is an isocyanate curing agent. A coating formed by curing the wood lacquer coating composition has good water resistance, heat resistance, aging resistance, smudginess resistance, hand feeling and the like.

The invention discloses a preparation method of an environment-friendly degradable rubber material, and relates to the technical field of rubber material preparation. The environment-friendly degradable rubber material disclosed by the invention is prepared by the following steps: plastifying natural rubber at high temperature, then adding reinforcing filler, palm oil paste, an anti-aging agent and an active agent for first-stage plastifying, and then adding part of rubber softening oil, zinc oxide, a foaming agent, a vulcanizing agent and a xanthate accelerant containing benzothiazole for second-stage rubber mixing; and adding the rest rubber softening oil to carry out third-stage rubber mixing to obtain a rubber material, and finally carrying out thin passing, packaging, standing and two-time vulcanization on the slurry to obtain the rubber material. The environment-friendly degradable rubber material provided by the invention is simple in preparation method, stable in processability, excellent in mechanical strength and rebound resilience, excellent in wear resistance, insulativity, acid and alkali resistance, aging resistance, high and low temperature resistance and waterproofness, and can be applied to the fields of diving suits, tires, wires and cables and the like.

The invention discloses an ultra-thick solvent-free epoxy coating for an offshore steel pipe pile as well as a preparation method and application of the ultra-thick solvent-free epoxy coating. The ultra-thick solvent-free epoxy coating is prepared from a component A and a component B, the component A comprises the following components in percentage by mass: 20-25% of epoxy resin, 20-25% of silicon branched modified epoxy resin, 2-5% of a reactive diluent, 10-20% of calcium carbonate, 10-20% of natural barium sulfate, 2-5% of graphene, 10-15% of glass flakes, 5-10% of silica powder, 5-10% of zinc phosphate, 0.8-2% of a thixotropic agent and 0.2-0.3% of a flatting agent; and the component B comprises 15-30% of a curing agent, 15-25% of talcum powder, 15-25% of natural barium sulfate, 10-15% of titanium dioxide, 5-10% of zinc phosphate and 0.2-0.3% of a leveling agent. According to the present invention, the adhesion, the salt resistance, the wear resistance and the aging resistance of the epoxy coating can be improved, and the epoxy coating can be used for the anti-corrosion coating of the offshore steel pipe pile close to or in contact with seawater.

The invention relates to the technical field of adhesive tapes, and particularly discloses a double-sided adhesive tape with excellent weather resistance and a preparation method thereof.The double-sided adhesive tape comprises a first release film layer, a first adhesive layer, a base material layer, a second adhesive layer and a second release film layer, the adhesive layer is prepared from an adhesive through simple processes of coating, drying and the like, industrial production is easy, and the adhesive tape has good weather resistance. The adhesive is obtained by mixing an acrylate polymer, modified polyvinyl alcohol, a defoaming agent and a plasticizer, the acrylate polymer and the modified polyvinyl alcohol have excellent adhesive power and can be firmly adhered to various materials, the raw materials of the adhesive form a stable composite system through structural complementation, and through chemical bonding and physical effects, the adhesive can be firmly adhered to various materials. The comprehensive performance of the double-sided adhesive tape is further improved, and the double-sided adhesive tape has excellent toughness and stability, is not easy to age and fall off, and is improved in weather resistance, adhesion and tensile strength, so that the double-sided adhesive tape is more durable in the use process.

The invention discloses a camouflage material, a hyperspectral camouflage coating and a preparation method and application thereof, and belongs to the technical field of camouflage materials, and the molecular formula of the camouflage material is Co2Cr3TiLiNiO10. The camouflage material has the performance of simulating spectral characteristics of natural yellow and green plants and has a good bionic function, crystals of the camouflage material are of a spinel structure, and the camouflage material has the characteristics that the lightness value L is relatively low, the hue is relatively dark, a green camouflage coating is easier to prepare, the camouflage material has the characteristics of good aging resistance, good thermal stability and the like, and the camouflage material can be used as a green camouflage coating. The reflectivity of the infrared plateau area is higher, the camouflage performance is easier to realize, and the spectral characteristics of green vegetation can be better simulated.

The invention relates to the technical field of rubber material preparation, in particular to a tear-resistant heavy truck engine suspension rubber material and a preparation method thereof. The tear-resistant heavy truck engine suspension rubber material is prepared from the following raw materials in parts by weight: 75 to 90 parts of natural rubber, 15 to 25 parts of butadiene styrene rubber, 8 to 20 parts of reinforced fibers, 12 to 25 parts of carbon black, 3 to 8 parts of an activating agent, 1.5 to 4 parts of an anti-aging agent, 2 to 4 parts of microcrystalline wax, 1.5 to 3.5 parts of an accelerant, 1 to 3 parts of a tackifier, 1 to 3 parts of a dispersing agent, 0.5 to 1.5 parts of sulfur and 0.5 to 1.5 parts of a silane coupling agent. The rubber material provided by the invention has excellent tear resistance, is suitable for heavy trucks and other high-load environments, has good aging resistance, ensures the long service life of the material, and is simple and feasible in preparation method, low in cost and easy to realize large-scale production.

The invention relates to a polybutylene terephthalate resin composition as well as a preparation method and application thereof. The polybutylene terephthalate resin composition comprises bio-based polybutylene terephthalate resin, a titanium element, a phosphorus element and a cobalt element, the weight content of a titanium element in the polybutylene terephthalate resin composition is 20 to 150 ppm, the weight content of a phosphorus element is 2 to 50 ppm, and the weight content of a cobalt element is 4 to 100 ppm; the mass ratio of the titanium element to the phosphorus element to the cobalt element in the polybutylene terephthalate resin composition is (2-20): (1-2): (1-10). According to the polybutylene terephthalate resin composition provided by the invention, the weight content and the mass ratio of the titanium element, the phosphorus element and the cobalt element are controlled in a proper range, so that the polybutylene terephthalate resin composition has high whiteness, excellent mechanical property and ageing resistance.

The invention discloses a composite cross arm, which comprises a first cross arm, and the first cross arm comprises a first core rod; the two first middle fittings are respectively connected to two different positions of the middle part of the first core rod; the second middle fitting is connected with the middle part of the first core rod, and the second middle fitting is positioned between the two first middle fittings; the two end hardware fittings are connected with the two ends of the first core rod respectively, and the end hardware fittings are used for hanging wires; and the first insulating layer covers at least part of the peripheral surface of the first core rod. The composite cross arm is simple in structure, convenient to install and low in cost.

The invention discloses an anti-UV and anti-aging master batch for a pesticide-resistant PE net and a preparation method of the anti-UV and anti-aging master batch, the master batch comprises the following components in percentage by mass: 70-80 wt% of matrix resin PE, 2-4 wt% of an anti-UV agent, 1-2 wt% of an antioxidant, 10-15 wt% of a pesticide-resistant agent and 5-12 wt% of an adjuvant, and the invention relates to the technical field of master batches for PE nets. Through scientific and reasonable proportioning, the anti-UV agent, the antioxidant, the pesticide-resistant agent and other additives have a synergistic effect, the pesticide resistance, ultraviolet resistance and aging resistance of the PE net are remarkably improved, uniform distribution of the additives in a PE matrix is guaranteed by using the dispersing agent and the plasticizer, and therefore the overall performance of the master batch is improved, and the service life of the PE net is prolonged. The master batch provided by the invention is suitable for production of various PE nets, and is especially suitable for agricultural protective nets which are used for a long time in high-pesticide and high-ultraviolet environments.

The invention belongs to the field of medical rubber materials, and particularly relates to a vulcanization preparation process of a medical puncture-resistant rubber gasket. A vulcanization preparation process of a medical puncture-resistant rubber gasket comprises the following steps: S1, raw rubber raw material preparation: crushing and mixing raw rubber raw materials to be vulcanized into raw rubber powder, removing impurities, and sieving; the raw rubber raw materials comprise halogenated butyl rubber, polyisoprene rubber and epichlorohydrin rubber; s2, preparing a rubber compound; the preparation method comprises the following steps: preheating an internal mixer to 80-100 DEG C, adding 80-90 parts by weight of raw rubber powder into the internal mixer, and refining at 115-125 DEG C for 5-9 minutes; adding 12-22 parts by weight of a modified composite filler, 2-6 parts by weight of zinc oxide, 1-3 parts by weight of stearic acid, 3-8 parts by weight of a crosslinking auxiliary agent and 0.5-1.2 parts by weight of an anti-aging agent, and mixing for 18-22 min; s3, calendaring and sheet discharging: calendaring and molding the rubber compound obtained in the step (2) to obtain a rubber compound sheet; s4, prevulcanization: putting the rubber compound sheet calendered in the step (3) into a mold cavity of a press vulcanizer, and carrying out under-vulcanization production to obtain a preformed sheet; the preformed rubber sheet in the step (4) and an organic solvent are subjected to cleaning treatment and drying and then put into a vulcanization mold to be subjected to vulcanization forming, the rubber gasket is obtained, the vulcanization temperature ranges from 140 DEG C to 150 DEG C, and the vulcanization time ranges from 3 min to 7 min. In order to solve the problem that the use performance of a medical rubber gasket is affected due to the fact that the medical rubber gasket is needled to fall scraps and is poor in rebound resilience, the invention provides the vulcanization preparation process of the medical needling-resistant rubber gasket.

The invention provides a preparation method of sealing aging resistant PBAT resin, biodegradable plastic and application, and the preparation method comprises the following steps: mixing adipic acid, butanediol and a first catalyst, and carrying out a first esterification reaction to obtain a first intermediate product; mixing terephthalic acid, m-phenylenediacetic acid, butanediol and a second catalyst, and carrying out a second esterification reaction to obtain a second intermediate product; performing a pre-polycondensation reaction on the first intermediate product, the second intermediate product and a pre-polycondensation catalyst in a polymerization reaction kettle to obtain a pre-polycondensation product; and carrying out final polycondensation on the pre-polycondensation product to obtain the sealing aging resistant PBAT resin. The edge sealing bag prepared from the sealing aging-resistant PBAT resin provided by the invention has more excellent sealing performance, and the sealing aging-resistant performance of the edge sealing bag is better.

The invention discloses a sensing optical cable for detecting vibration, and belongs to the technical field of communication cables, the sensing optical cable for detecting vibration comprises an inner layer sensing optical fiber, a TPEE sleeve, an inner layer water-blocking fiber paste, a PBT sleeve, an outer layer water-blocking fiber paste and an outer sheath in sequence from inside to outside; the inner-layer water-blocking fiber paste and the outer-layer water-blocking fiber paste are both optical fiber filling paste; the optical fiber filling paste is prepared from paraffin-based hydrogenated white oil, poly-alpha-olefin synthetic oil, epoxy vinyl silicone oil, an oil separation inhibitor, a polyisobutene material, siloxane modified polyvinyl alcohol, organic ammonium modified bentonite, ferric acetylacetonate and an antioxidant. The sensing optical cable for detecting vibration is simple in structure, has excellent mechanical strength, toughness, gas barrier property, waterproofness, corrosion resistance, high and low temperature resistance, wear resistance, aging resistance, flame retardance and the like, can still ensure high stability and high sensitivity of optical fiber vibration detection in harsh environments such as underwater or underground, and prolongs the service life of the sensing optical cable.

This invention provides a modified glass fiber, glass fiber reinforced butyl hot melt adhesive, and their preparation method. The modification method of the glass fiber includes: mixing a silane coupling agent with ethanol, stirring and hydrolyzing to obtain a silane coupling agent solution; placing the glass fiber in the silane coupling agent solution, stirring and reacting at 40-80℃ for 4-6 hours, then filtering, and curing the obtained solid product at 100-150℃ for 0.5-2 hours to obtain pre-modified glass fiber; immersing the pre-modified glass fiber in a toluene solution containing furanylsilane coupling agent, reacting under inert gas protection at 70-90℃ for 1-3 hours, and performing graft modification treatment to obtain the modified glass fiber. The use of silane coupling agent and furanylsilane coupling agent to introduce dynamic covalent bonds, synergistically modifying the glass fiber with a bilayer coupling agent, and introducing the modified glass fiber into the butyl rubber system, can effectively improve the mechanical properties and aging resistance of the butyl rubber while maintaining its original water tightness and air tightness.