485 results about "Isoprene" patented technology

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

A green and sustainable tire base rubber composition and a preparation method, relating to the technical field of tire production. The composition comprises a tire base. The tire base comprises 100 parts by weight of cis-1,4-polyisoprene, 20-40 parts by weight of bio-based carbon black, 0-20 parts by weight of bio-based silicon, 0-20 parts by weight of a silane coupling agent, 1-3 parts by weight of stearic acid, 2-7 parts by weight of zinc oxide, 0.5-2 parts by weight of a carbon black coupling agent, 1.5-3.5 parts by weight of the antioxidant 6PPD, 0.5-2 parts by weight of the antioxidant TMQ, 1.5-2 parts by weight of oil-extended sulfur powder, and 1.5-3.0 parts by weight of the accelerator CZ. The use of the carbon black coupling agent reduces the heat build-up of a rubber material, however, the Mooney viscosity of the rubber is significantly increased. Once a dedicated process has been used, the viscosity of the rubber material is controlled, and the tanδ value of the heat build-up of the rubber material at 60°C is significantly reduced, so that the rolling resistance of a tire is reduced, and the tire maintains good physical and mechanical properties.

The present invention relates to an adhesive composition for a polyester tire cord, a method for preparing a polyester tire cord, and a tire cord comprising the same, according to the present invention, when the polyester tire cord is prepared, the adhesive composition can be used for manufacturing a polyester tire cord, according to the present invention, the binding force between polyester fibers and a first treatment liquid can be increased by treating with the first treatment liquid containing a salt containing an anionic functional group, and then the crosslinking density can be increased by treating with a second treatment liquid containing an isoprene rubber latex, thereby not only having excellent high-temperature adhesive force, but also having excellent water resistance. And no harmful substances are used, so that the environment-friendly property is realized. In addition, uniform adhesion of the processing liquid is achieved by minimizing the influence caused by the external environment, thereby reducing the manufacturing manufacturability and the production cost. The polyester tire cord prepared as above can exhibit high heat-resistant adhesive force, rubber coverage, and excellent heat resistance characteristics.

The invention discloses a recyclable lawn and a preparation method thereof, and belongs to the technical field of artificial turfs. The lawn sequentially comprises artificial grass yarns, a base cloth layer and a back glue layer from top to bottom, the artificial grass yarns and the base cloth layer are made of polyolefin; the back adhesive layer is prepared from the following components in parts by weight: 4 to 8 parts of polyolefin elastomer, 10 to 20 parts of olefin block copolymer, 20 to 30 parts of hydrogenated styrene-butadiene copolymer, 8 to 12 parts of styrene-isoprene copolymer, 10 to 12 parts of butadiene-styrene rubber, 2 to 6 parts of ethylene-acrylic acid copolymer, 15 to 30 parts of plasticizer, 0.1 to 0.4 part of antioxidant, 3 to 6 parts of compatilizer and 2 to 4 parts of modified filler; according to the lawn, the artificial grass yarns, the base cloth layer and the gum layer are similar in component, so that the lawn can be conveniently and integrally recycled subsequently, the utilization rate of the lawn gum is increased, and resource waste is reduced.

The invention discloses high-strength durable pervious concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials in parts by weight: 160 to 220 parts of cement, 1200 to 1600 parts of coarse aggregate, 170 to 230 parts of fine sand, 160 to 200 parts of water, 3 to 4.5 parts of polycarboxylate superplasticizer, 5 to 15 parts of silica fume, 1 to 3 parts of polypropylene fiber, 8 to 12 parts of modified nano cellulose and 5 to 7 parts of flexibilizer, wherein the flexibilizer comprises modified graphene oxide, propylene glycol monomethyl ether and polyisoprene rubber. The interface compatibility is enhanced through the modified nanocellulose, microcracks are reduced, the bonding strength of aggregate and cement is improved, and the compressive strength is improved; the toughening agent component endows the concrete with toughness and durability, the toughening agent component and the toughening agent component have a synergistic effect, and the concrete prepared by mixing the various raw materials has excellent mechanical properties and durability on the basis of good water permeability, and has a wide market application prospect.

The present invention relates to a packaged condom comprising a sealed package; and within the package, a condom comprising natural rubber latex and / or synthetic polyisoprene; wherein the condom comprises, on one or more surfaces thereof and in contact with the natural rubber latex and / or synthetic polyisoprene, an aqueous lubricant; wherein the aqueous lubricant comprises: a thickener and 5 wt.% to 30 wt.%, based on the total weight of the aqueous lubricant, of a humectant comprising at least one organic compound selected from the group consisting of glycerol, propylene glycol, polyethylene glycol, and any combination thereof; and one or more sugar alcohols having a molecular weight of from 120 to 10000 g / mol. It also relates to a method for preparing a packaged condom and to the use of an aqueous lubricant to lubricate one or more surfaces of a condom. The condom preferably presents a transparent appearance to the end user.

The present disclosure provides a method for producing a polyisoprenoid, which makes it possible to synthesize in vitro a polyisoprenoid having an unprecedented structure, such as a 100% cis-polyisoprenoid or a polyisoprenoid containing an allylic diphosphate derivative as an initiating terminal. The present disclosure relates to a method for producing a polyisoprenoid in vitro, which employs a gene coding for a neryl diphosphate synthase and rubber particles bound to a protein encoded by the gene, or a method for producing a polyisoprenoid, which includes introducing into a plant a vector in which a gene coding for a neryl diphosphate synthase is linked to a promoter having a promoter activity that drives laticifer-specific gene expression to express a protein encoded by the gene specifically in laticifers.

The invention discloses SIS (styrene-isoprene-styrene) containing dynamic reversible bonds and a preparation method thereof, and belongs to the technical field of high polymer materials. The copolymer is prepared through a Diels-Alder reaction with bismaleimide on the basis of a polystyrene construction unit with two tail ends capped with furan and a polyisoprene construction unit module with two tail ends capped with furan. Wherein the DA bond has a thermal reversible characteristic. The furan end-capped building unit module with controllable molecular weight and narrow distribution is prepared, and reversible connection and dissociation of blocks are realized through a modularization strategy. According to the invention, an inverse Diels-Alder reaction can be carried out at 120-140 DEG C, and is dissociated into an original construction unit module, so that the proportion of soft and hard segments of a copolymer is changed by supplementing a specific construction unit feeding amount and carrying out the Diels-Alder reaction again; the SIS has the advantages of being accurate in structure and designable in performance at the same time, flexible regulation and control over the block proportion are achieved through the SIS containing the dynamic reversible bonds, and meanwhile the SIS has wide application prospects in the fields of recyclable adhesives, intelligent packaging, flexible electronics and the like.

The invention relates to the technical field of coatings, and particularly discloses a low-temperature-resistant waterproof coating for an outer wall of a house building and a preparation process of the low-temperature-resistant waterproof coating. The water-based paint is prepared from the following raw materials in parts by mass: 200 to 250 parts of modified silicone acrylic emulsion, 75 to 125 parts of polyurethane-acrylate core-shell emulsion, 40 to 60 parts of polyether polyol modified nano filler, 15 to 25 parts of rubber nano powder, 10 to 20 parts of liquid polyisoprene, 22 to 34 parts of an auxiliary agent and 60 to 100 parts of a composite solvent. According to the low-temperature-resistant waterproof coating prepared by the invention, the elongation at break and the low-temperature bending resistance of a coating film are remarkably improved on the premise of keeping relatively good tensile strength and adhesive force.

The invention relates to the technical field of furniture protective films, in particular to a self-adhesive furniture skin-touch protective film which sequentially comprises an organic silicon release film from bottom to top, the organic silicon release film comprises a base material and a coating, the base material is a transparent polyethylene glycol terephthalate film with the thickness of 80-120 micrometers, and the coating is a transparent polyethylene glycol terephthalate film with the thickness of 80-120 micrometers. The coating is an organic silicon release agent coated on the base material, and the coating weight of the organic silicon release agent is 0.8-1.2 g / m; the pressure-sensitive adhesive layer comprises 60 to 70 weight percent of a compound system of a saturated hydrocarbon block copolymer and a hydrogenated styrene isoprene styrene block copolymer; 25 to 35 wt% of hydrogenated C9 petroleum resin; 3 to 5 weight percent of temperature-sensitive microcapsules; and 2 to 5 wt% of naphthenic oil. According to the invention, through the cooperation of innovative multi-layer structures, the product can maintain excellent comprehensive performance under different parameter configurations, and multiple requirements of the furniture protective film on easy construction, high transparency, strong protection, good touch feeling and aging resistance are met.

The invention relates to the technical field of high polymer material and automobile part manufacturing, and discloses a high-durability high-low temperature resistant automobile composite sealing strip, which is prepared from the following raw materials: ethylene propylene diene monomer, polyisoprene grafted maleic anhydride, pre-dispersed master batch, carbon black and a vulcanization system. The pre-dispersed master batch takes oxidized polyethlene wax as a carrier to wrap zinc oxide and D-mannitol. The phase change characteristic of the carrier is utilized, active components are isolated in the mixing and extruding stage, and scorching is prevented; the components are released in the high-temperature vulcanization stage to initiate anhydride ring opening, and a double cross-linked network with coexistence of covalent bonds and ionic bonds is constructed. According to the sealing strip, the macromolecular reactive plasticizer is used for replacing part of liquid paraffin, the atomization problem caused by micromolecule migration is solved, the high-temperature compression permanent deformation rate is remarkably reduced through a thermal reversible mechanism of an ion cluster, and excellent low-temperature rebound resilience and processing safety are both considered.

It has been unexpectedly found that certain neodymium catalyst systems can be used to copolymerize isoprene and 1,3-butadiene to produce random isoprene-butadiene copolymer rubbers which are not tapered. These random isoprene-butadiene copolymer rubbers have properties which are beneficial for use in rubber formulations for manufacturing a wide variety of rubber products, such as tires, hoses, conveyor belts, power transmission belts, and shoe soles. These random isoprene-butadiene rubbers are synthesized by copolymerizing (a) isoprene monomer or a substituted isoprene monomer and (b) 1,3-butadiene monomer in the presence of a neodymium catalyst system, wherein the neodymium catalyst system is prepared by (1) reacting a neodymium carboxylate with an organoaluminum compound in the presence of a conjugated diolefin monomer to produce neodymium-aluminum catalyst component, and (2) subsequently reacting the neodymium-aluminum catalyst component with an alkyl aluminum chloride to produce the neodymium catalyst system.

The invention belongs to the technical field of nano inorganic filler surface modification, and discloses modified nano calcium carbonate which is prepared by the following steps: reacting a nano calcium carbonate raw material with a compound modifier at 70-80 DEG C, and drying, crushing and grading after the reaction is completed, wherein the compound modifier is composed of a component A and a component B in a molar ratio of 1: (1.2-2.0); the component A is selected from p-sulfo calix [n] arene or salt thereof, and n is an integer from 4 to 8; and the component B is selected from epoxy group modified polyisoprene. According to the present invention, the modification formula of mixing the sulfonic acid calixarene compound and the epoxy group modified polyisoprene is used, the molar ratio of the two components is precisely regulated and controlled, and the exposure ratio of the active hydroxyl group in the system is reasonably controlled, such that the modification formula can be used for the modification of the nano calcium carbonate, the modified nano calcium carbonate can effectively improve the impact strength and thixotropy of the base coat and reduce the viscosity of the base coat, and finally, adaptive balance between the thixotropy and the processing fluidity is achieved.

The application provides an isomerized eucommia elastomer and a preparation method and application thereof. The isomerized eucommia elastomer forms cis-isoprene structure in the molecular chain through self-isomerization reaction. By regulating the content of cis structure, the regulation of the regularity of the molecular chain is realized, so that the isomerized eucommia rubber no longer crystallizes at room temperature and exhibits high elasticity. Meanwhile, the suitable regularity enables the isomerized eucommia rubber to have self-reinforcing capacity and exhibit excellent mechanical strength. The application also provides a preparation method and application of the isomerized eucommia elastomer. The isomerization modification of the eucommia rubber is carried out by using a mercapto compound or a disulfide compound under the initiation of a free radical initiator. The high-performance isomerized eucommia rubber elastomer material obtained by the application does not change the original chemical structure and polarity of the eucommia rubber, has similar structure and performance to natural rubber, can make up for the problem of insufficient yield of natural rubber, and has wide application prospects in the fields of tires, conveyor belts, sealing rings, wearable devices and the like.

The invention relates to a rubber composition having improved tear strength. This composition is based on 20 to 50 phr of copolymer containing ethylene units and units of a 1,3-diene of formula CH2═CR—CH═CH2, the symbol R representing a hydrocarbon chain containing 3 to 20 carbon atoms, the ethylene units in the copolymer representing between 50 mol % and 95 mol % of the monomer units of the copolymer; 50 to 80 phr of polyisoprene comprising a content by weight of cis-1,4-bonds of at least 90% of the weight of the polyisoprene; a reinforcing filler; from 0.2 to 0.9 phr of zinc oxide; and a vulcanization system. The invention also relates to rubber articles comprising a composition according to the invention, in particular pneumatic tyres, at least one sidewall of which comprises a composition according to the invention.

The invention discloses freeze-thaw-resistant concrete and a preparation method thereof. The freeze-thaw-resistant concrete is prepared from the following raw materials: cement, river sand, gravel, water, isoprene rubber particles coated with paraffin on the surfaces and an additive, the preparation method comprises the following steps: uniformly mixing the river sand and the isoprene rubber particles coated with the paraffin on the surface, adding other raw materials, and uniformly mixing. Space generated after the isoprene rubber particles are extruded provides space for freezing expansion of free water, expansion pressure is relieved, the freeze-thaw resistance of concrete is improved, the surfaces of the isoprene rubber particles are coated with paraffin, and under the freeze-thaw condition, the paraffin is solidified, releases heat and reduces osmotic pressure and ice expansion pressure, so that the freeze-thaw resistance of the concrete is improved, and the service life of the concrete is prolonged. The paraffin surrounds the isoprene rubber particles, erosion of water to the isoprene rubber particles can be reduced, aging of the isoprene rubber particles can be inhibited, the thermal conductivity of the paraffin and the isoprene rubber particles is smaller than that of aggregate, temperature reduction of the aggregate can be inhibited, and the freeze-thaw resistance of the concrete is further improved.

The utility model relates to the field of medical supply devices, in particular to a polyisoprene gasket capable of improving the inward sinking risk, which comprises an inner cover wrapped on a bottle opening of a medical bottle and an outer cover tightly attached to the inner cover, and a rubber head convenient for a needle to pierce is arranged at the center position of the outer cover. The rubber head is provided with an anti-sinking assembly matched with the inner cover. The pressing part of the anti-sinking assembly abuts against the inner cover, so that the phenomenon of sinking is effectively improved, meanwhile, a medical medicine bottle does not permeate air, the use safety of medicine is guaranteed, meanwhile, acupuncture is convenient, and the phenomenon of medicine waste is reduced.

Provided is a method for producing a polymer latex, comprising a step for obtaining an emulsion by emulsifying a polymer solution of a synthetic polyisoprene and / or styrene-isoprene-styrene block copolymer in water in the presence of rosin and / or a metal salt of rosin; and a step of removing the organic solvent from the emulsion, in the rosin and / or the metal salt of the rosin, the content ratio of the total of abietic acid, neoabietic acid, pinolenic acid and salts thereof is 5% by weight or less, the content ratio of dehydroabietic acid is 80-100% by weight, and the content ratio of the rosin and / or the metal salt of the rosin is 5% by weight or less. The content ratio of the rosin and / or the metal salt of the rosin in the polymer latex is more than 1.5 parts by weight with respect to 100 parts by weight of the total of the synthetic polyisoprene and / or the styrene-isoprene-styrene block copolymer contained in the polymer latex.

The invention relates to a modified asphalt sizing material, which is prepared from the following components in percentage by weight: 35.5 to 38.5 percent of 70 # asphalt, 6.5 to 9.5 percent of base oil, 4.5 to 5.5 percent of aromatic oil, 3.5 to 4.5 percent of SBS (Styrene Butadiene Styrene), 5.5 to 6.5 percent of SIS (Styrene Isoprene Styrene), 5.5 to 6.5 percent of SBR (Styrene Butadiene Rubber) powder, 1.9 to 2.1 percent of blocked isocyanate, 0.06 to 0.08 percent of activating agent, 4.5 to 5.5 percent of porous silicon dioxide and 24 to 30 percent of powder. The modified asphalt sizing material can trigger the activating agent to catalyze the deblocking of the blocked isocyanate at the processing temperature of 180 + / -2 DEG C to release-NCO groups, the-NCO groups can react with trace moisture in an asphalt system to generate CO2 gas, in the rubber layer forming process, CO2 is wrapped by the asphalt in a viscoelastic state to form a uniform closed-cell foam structure, and in the forming process of a rubber layer, the modified asphalt sizing material can be used for forming an asphalt layer. According to the structure, liquid water permeation is blocked by utilizing the characteristic that the surface tension of liquid water is greater than that of a bubble wall, and an initial channel is constructed for vapor diffusion; furthermore, closed-cell foam is bridged by utilizing nano-pores of porous silicon dioxide, a'nano-pore adsorption-micropore diffusion 'three-dimensional vapor-permeable network is constructed, diffusion and discharge of water vapor are accelerated, liquid water is further blocked, and dynamic balance of waterproofness and breathability is realized.

The invention belongs to the technical field of materials, and discloses an anti-aging rare earth butadiene-isoprene rubber material and a preparation method thereof.The anti-aging rare earth butadiene-isoprene rubber material is prepared by taking rare earth butadiene-isoprene rubber as a base material and taking an inorganic reinforced additive, a composite anti-aging agent and the like as auxiliary materials through mixing and extrusion; wherein the inorganic reinforced additive is prepared by modifying epoxidized natural rubber on the surface of filler illite, and after surface modification, illite can exist in the material in a physical crosslinking core form, so that good stress absorption and stress dispersion effects can be generated, and the mechanical property of the material is enhanced; the compound type anti-aging agent structure not only contains an ammonia anti-aging agent, but also contains a benzimidazole anti-aging agent, so that a synergistic anti-aging effect can be realized through different action principles and action stages, and the anti-aging performance of the material is effectively enhanced.

The invention discloses a method for preparing a secondary brominated branched butyl rubber. The method comprises adding a high molecular weight brominated grafting agent to a mixed solvent, stirring the mixture until the high molecular weight brominated grafting agent is completely dissolved, and obtaining a mixed solution; cooling the mixture, sequentially adding a diluent, isobutylene, and isoprene to the mixed solution, stirring and mixing the mixture, and obtaining a polymerization reaction system; and cooling the mixture again; mixing the diluent and a co-initiator, aging the mixture, and then adding the mixture to the polymerization reaction system, stirring and reacting the mixture, adding a terminator, and coagulating the material, washing, and drying the material to obtain a secondary brominated branched butyl rubber; the high molecular weight brominated grafting agent is a linear block copolymer composed of isoprene, styrene, and vinyl bromide. The preparation method of the invention not only solves the problem of slow stress relaxation rate of butyl rubber during processing, but also maintains sufficient green rubber strength and good air tightness, and provides a balance between physical and mechanical properties and vulcanization processing performance.

The invention provides a preparation method of modified epoxy acrylate resin, which comprises the following steps: (1) mixing epoxy-terminated polyisoprene liquid rubber, unsaturated binary acid and a catalyst A for reaction A, and then adding polyol and a catalyst B for reaction B to obtain a modifier; and (2) mixing epoxy resin, unsaturated monocarboxylic acid, a catalyst A and a polymerization inhibitor for reaction C, then adding the modifier and the cross-linking agent in the step (1), and uniformly mixing to obtain the modified epoxy acrylate resin. The synthetic process is simple, the reaction endpoint is clear, the resin toughness is improved, the resin curing shrinkage rate is reduced, and the wettability with glass fibers is improved.

The present disclosure provides a conductive diaphragm and a speaker using same. The conductive diaphragm includes a main portion made of polymer material and a conductive portion located on the main portion. The conductive portion includes a substrate with a film layer and conductive material dispersed in the substrate, the film layer is solidified from at least one material of thermoplastic elastomer, phenyl silicone, isoprene rubber, or fluoroelastomer. Compared with the related technologies, the conductive diaphragm disclosed by the present disclosure has excellent atigue-resistant property and could maintain good adhesive strength and toughness.

The invention relates to the field of polypropylene materials, and particularly discloses a polypropylene injection molding integrated material special for daily stools and a preparation method thereof. The polypropylene injection molding integrated material is prepared from the following raw material components in parts by weight: 35 to 55 parts of polypropylene crushed material, 10 to 20 parts of ground calcium carbonate, 10 to 50 parts of silicon-containing talcum powder, 10 to 30 parts of waste regenerated glass powder, 2 to 3 parts of maleic anhydride grafted polyolefin elastomer, 1 to 2 parts of hydrogenated styrene-isoprene block copolymer and 3 to 4 parts of all-vinyl polyolefin elastomer. And 0.2 to 0.3 part of an antioxidant. According to the invention, the use of new materials by daily stools is greatly reduced, so that retired polypropylene can be regenerated and recycled with high value, and the realization of carbon emission reduction is facilitated; moreover, the polypropylene injection molding integrated material special for the daily stool has relatively high mechanical strength, impact strength and rigidity, also has excellent toughness, and can meet daily use requirements.

The invention relates to a sealing ring material and a preparation method and application thereof, and belongs to the technical field of diaphragm pump components. The sealing ring material comprises the following components in parts by weight: 100 parts of a rubber matrix; 5 to 10 parts of boron nitride nanosheets; 5 to 10 parts of graphene oxide; 4-8 parts of microcrystalline wax; 3-6 parts of sulfur; 2-4 parts of sodium stearate; 1-4 parts of a vulcanization accelerator; 1-3 parts of zinc oxide; 4-8 parts of an anti-aging agent; the rubber matrix comprises nitrile rubber, chloroprene rubber and isoprene rubber, and the nitrile rubber accounts for 60-80 wt% of the total amount of the rubber. The sealing ring material provided by the invention has relatively good high temperature resistance, is not easy to soften and deform, also has relatively good air tightness and permeation resistance, and has obvious performance advantages when being used as a sealing ring for a diaphragm pump.

The invention relates to a rubber composition having a good performance compromise between elongation at break, tear strength and fatigue resistance. This composition is based on at least one elastomer matrix comprising from 85 to 98 phr of at least one copolymer containing ethylene units and 1,3-diene units, the molar fraction of ethylene units in the copolymer being within a range extending from more than 50% to 95%, and from 2 to 15 phr of a polyisoprene comprising a content by weight of cis-1,4 bonds of at least 90% of the weight of the polyisoprene, a reinforcing filler comprising carbon black having a BET specific surface area within a range extending from 50 to 160 m2 / g, and a crosslinking system. The invention also relates to a tyre comprising this composition.

The invention belongs to the technical field of PVC (polyvinyl chloride) materials, and particularly relates to a non-toxic PVC material for children's toys and a preparation method of the non-toxic PVC material. The non-toxic PVC material for the children's toys comprises the following components in percentage by mass: 30-50% of PVC powder, 20-40% of a plasticizer, 8-15% of a functional aid, 8-15% of an epoxidized soybean oil-calcium carbonate compound, 0.5-2% of a stabilizer and 0.1-1% of a lubricant, the functional auxiliary agent is prepared from maleic anhydride modified liquid polybutadiene rubber, ethylene-ethyl acrylate-maleic anhydride copolymer micro powder and a styrene-isoprene-styrene triblock copolymer. The non-toxic PVC material for children's toys provided by the invention is non-toxic, does not have the problems of stickiness, oil leakage and the like, and has excellent printability.

The invention discloses a flex-resistant rubber composition for a triangular belt compression layer and a preparation method thereof. The flex-resistant rubber composition is prepared from the following components in parts by weight: 70 to 80 parts of natural rubber, 20 to 25 parts of butadiene styrene rubber, 10 to 15 parts of liquid polyisoprene rubber, 20 to 25 parts of layered inorganic powder, 1 to 2 parts of maleic anhydride polybutadiene, 5 to 10 parts of blue cotton short fiber, 50 to 60 parts of carbon black, 5 to 10 parts of white carbon black, 3 to 5 parts of coupling agent, 2 to 4 parts of tackifier, 2 to 3 parts of plasticizer, 6 to 8 parts of activator, 1.5 to 2.0 parts of anti-aging agent, 0.5 to 1 part of zinc methacrylate, 1 to 2 parts of accelerant and 2.8 to 3.0 parts of sulfur. The liquid polyisoprene rubber is utilized to mechanically shear and modify the layered inorganic powder, and when the liquid polyisoprene rubber is used for the rubber composition, the layered slippage property is achieved, so that stress concentration is avoided. The blue cotton short fiber is cooperated to increase the strength, limit the movement of a rubber molecular chain, prevent crack propagation and improve the flex resistance.

The application belongs to the technical field of adhesives, and particularly relates to a rubber type removable pressure sensitive adhesive and a preparation method thereof. The application provides a rubber type removable pressure sensitive adhesive, and preparation raw materials include, by weight, 100 parts of styrene-isoprene-styrene block copolymer, 100-150 parts of tackifying resin, 30-70 parts of softening agent, 0.2-1.5 parts of main antioxidant and 0.2-1.5 parts of auxiliary antioxidant. The unique formula design of the application enables the adhesive to have excellent instantaneous adhesion and sufficient cohesion. The pressure sensitive adhesive of the application benefits from balanced viscoelasticity, and the adhesive can be separated in a clean interface during peeling, without any residue on the surface of the adherend (such as glass, ceramic tile and wooden paint surface) and without damaging the base material. By using hydrogenated resin and a composite antioxidant system, oxidative degradation is fundamentally inhibited, the product is not prone to yellowing, brittle and oiling during long-term use, and has a long service life.

The application relates to the technical field of high polymer materials, and discloses a PE material containing nano reinforcing material and a preparation method thereof, which comprises the following raw materials: low-density polyethylene, nano reinforcing material, high-temperature-resistant additive component, a compatilizer, a lubricant and an antioxidant; the low-density polyethylene is used as a matrix, the nano reinforcing material is added, nano C60 is grafted with hyperbranched polyester, the compatibility of the nano C60 and the matrix is effectively improved, the agglomeration of the nano C60 in the matrix is avoided, the advantages of the nano C60 are better exerted, and the mechanical properties of the PE material are improved; the high-temperature-resistant additive component is added, the polyisoprene molecular chain with good flexibility is used to disperse and absorb external impact energy, the toughness of the matrix is improved, the diphenyl ether group high-temperature-resistant rigid ring is introduced into the polyisoprene structure, the compatilizer can be reacted with the matrix to be crosslinked in the processing process, and the high-temperature-resistant performance and the toughness of the PE material are further improved.