1121 results about "Isoprene" patented technology

The disclosure relates to hydrogen mediated anionically copolymerized conjugated diene vinyl aromatic compositions, copolymers of isoprene and / or butadiene with styrene, and processes and compositions for preparing them.

The invention discloses an antistatic polyisoprene rubber anesthesia air storage bag, and relates to the technical field of anesthesia air storage bags. The antistatic polyisoprene rubber anesthesia air storage bag is prepared from the following raw materials in parts by weight: 100 parts of polyisoprene latex, 0.5 to 2 parts of a stabilizer, 1 to 2 parts of a sodium p-styrenesulfonate aqueous solution, 3 to 6 parts of nano silicon dioxide suspension dispersion liquid, 1 to 2 parts of an anti-aging agent, 0.8 to 2 parts of conductive graphite and 3 to 6 parts of a vulcanization bag, the anti-aging agent is prepared by the following steps: reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with glycerol 1-oleyl ether-d5 to generate an esterification product, epoxidizing the esterification product with hydrogen peroxide and formic acid, and reacting the epoxidized product with N-phenyl-1, 3-phenylenediamine, and has excellent migration resistance. By adding the anti-aging agent into the polyisoprene rubber, the anti-aging capability of the anesthesia air storage bag is improved.

The invention relates to the technical field of cables, and provides a tensile new energy charging pile cable which comprises a conductor, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside. The sheath layer comprises the following components in parts by weight: 60-70 parts of chlorinated polyethylene, 15-20 parts of polyisoprene, 5-10 parts of an ethylene-methyl methacrylate copolymer, 8-18 parts of an acrylonitrile-butadiene-styrene copolymer, 20-30 parts of modified hydroxyapatite, 1-5 parts of a lubricant, 3-6 parts of a plasticizer, 30-40 parts of a flame retardant and 1-3 parts of an antioxidant; the raw materials of the modified hydroxyapatite comprise hydroxyapatite and a modifier; the modifier comprises maleic acid-acrylic acid copolymer sodium salt; the weight ratio of the hydroxyapatite to the modifier is 45: (1-7). According to the technical scheme, the problem that the cable sheath layer of the new energy charging pile is poor in tensile property and corrosion resistance in the prior art is solved.

The invention discloses a waterproof sealing flexible hot melt adhesive and a preparation method thereof, and relates to the field of hot melt adhesives. The waterproof sealing flexible hot melt adhesive is prepared from 65 to 70 parts of EVA (Ethylene Vinyl Acetate) resin, 20 to 22 parts of POE (Polyolefin Elastomer), 5.5 to 6.5 parts of maleic anhydride grafted POE, 4.2 to 4.8 parts of SIS (Styrene Isoprene Styrene) block copolymer, 1.2 to 1.8 parts of maleic anhydride grafted SIS block copolymer, 15 to 20 parts of tackifier, 4 to 6 parts of viscosity modifier and 1 to 1.5 parts of antioxidant. According to the hot melt adhesive, the EVA resin, the POE polyolefin elastomer and the SIS block copolymer are matched, and the compatibility of the EVA resin, the POE polyolefin elastomer and the SIS block copolymer is improved through the maleic anhydride grafted POE polyolefin elastomer and the maleic anhydride grafted SIS block copolymer, so that the hot melt adhesive with a good bonding effect on a film-coated paper box and a good low-temperature-resistant effect can be obtained; and the bonding durability of the film-coated paper box in a humid environment or a low-temperature environment can be effectively improved.

The invention discloses a far-infrared high-transmittance composite material, a preparation method thereof and an optical device, and the far-infrared high-transmittance composite material comprises the following components in parts by weight: 70-99 parts of a polymer matrix; 1-30 parts of an anti-reflection auxiliary agent; the polymer matrix is a sulfur-containing polymer prepared by polymerization reaction of a polymeric monomer and sulfur, and the proportion of carbon-carbon unsaturated bonds is less than 3%; the polymeric monomer is selected from at least one of a vinyl monomer, a propenyl monomer, an acrylic acid monomer, a methacrylic acid monomer, an epoxide monomer, a thiopropyl ring monomer, an alkynyl monomer, a butadiene monomer, an isoprene monomer and a norbornene monomer; the anti-reflection auxiliary agent comprises at least one of nano zinc sulfide, nano zinc selenide, nano calcium fluoride, nano magnesium fluoride and nano magnesium oxide. The composite material and the optical device thereof have high far infrared transmittance and good mechanical properties and processability, and can meet the requirements of various far infrared optical fields.

Adhesive compositions including 20 wt. % to 80 wt. % of a polymer selected from the group consisting of a radial styrene-isoprene block copolymer, a radial styrene-butadiene block copolymer, and combinations thereof, and 3 wt. % to 80 wt. % of a liquid rubber having a molecular weight of 300 Daltons to 100,000 Daltons, where the liquid rubber is selected from the group consisting of an isoprene rubber, a butadiene rubber, and combinations thereof. Such adhesive compositions exhibit high cohesive integrity as well as high adhesion and peel properties.

The invention belongs to the field of petrochemical engineering high-end carbon materials, and particularly relates to a method for preparing a high-end carbon material raw material by supercritical extraction of oil slurry, and the method comprises the following specific preparation steps: S1, uniformly mixing the oil slurry with a diluting solvent, and performing countercurrent contact extraction with a main solvent in an asphalt extraction tower to obtain a byproduct asphalt; s2, continuously extracting the raffinate phase in an aromatic oil extraction tower to obtain aromatic oil; and S3, continuously extracting the raffinate phase in the supercritical light deoiling tower to obtain a byproduct alkane oil. In the extraction process, isopentane is selected as an extraction solvent, and the temperature and pressure of an extraction tower are accurately controlled, so that asphaltene, ash and other impurities in the asphalt are effectively stripped, 3-5 ring aromatic hydrocarbon in the asphalt is extracted into aromatic hydrocarbon oil, the yield of the asphalt is reduced to 6-9%, the yield of light oil and heavy oil is effectively improved, and the production cost is reduced. The needle coke prepared from the aromatic hydrocarbon oil obtained by the method disclosed by the invention can reach the standard of Japan water island X-grade coke.

The invention relates to a fluorine-containing binder for a sulfide all-solid-state battery and a preparation method and application thereof.The binder is formed by copolymerizing isoprene and lithium perfluorovinyl ether sulfonate, specifically, the lithium perfluorovinyl ether sulfonate, a chelating agent, an emulsifying agent, ferrous sulfate, a reducing agent and an acid-base buffering agent are dissolved in water, cooling is conducted in the inert atmosphere, and the fluorine-containing binder for the sulfide all-solid-state battery is obtained. And adding isoprene, an initiator and a molecular weight regulator, and carrying out polymerization reaction to obtain the fluorine-containing binder. The isoprene can enhance the solubility of the lithium perfluorovinyl ether sulfonate fragment in the non-polar solvent, so that the whole polymer is dissolved in the non-polar solvent; the perfluorovinyl ether lithium sulfonate has a large space proportion of fluorocarbon groups, and has a shielding effect on hydrocarbon groups on isoprene, so that the stability of the whole polymer can be improved. The fluorine-containing binder prepared by the preparation method disclosed by the invention is a binder with high elasticity, high ionic conductivity and high stability.

The present invention relates to a tire for vehicle wheels which comprises at least one structural component comprising at least one reinforcing element constituted by an elongate element coated with, or embedded in, a vulcanised elastomeric compound obtained by vulcanising an elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of a diene elastomeric polymer and lignin, in an amount to provide the elastomeric composition with 100 to 10 phr of diene elastomeric polymer and a quantity of lignin equal to or greater than 20 phr, (ii) from 0 to 90 phr of a diene elastomeric polymer, (iii) at least 30 phr of a carbon black reinforcing filler, (iv) optionally, a reinforcing resin comprising at least 0.5 phr of a methylene acceptor compound associated with at least 0.2 phr of a methylene donor compound, (v) from 0.1 to 10 phr of carbon nanotubes, and (vi) from 0.1 to 12 phr of at least one vulcanising agent, wherein at least 50 phr of said diene elastomeric polymer is constituted by natural or synthetic isoprene rubber.

The invention discloses high-viscosity and high-elasticity modified asphalt and an asphalt composition, belongs to the field of asphalt, and solves the technical problem that the existing asphalt material lacks high-viscosity and high-elasticity modified asphalt suitable for diversified climates. The high-viscosity and high-elasticity modified asphalt suitable for diversified climates is prepared from the following raw materials in parts by mass: 100 parts of road petroleum asphalt, 2.5-4 parts of an epoxidized modified styrene-butadiene-styrene block copolymer, 5-10 parts of a hyperbranched polyester modified styrene-isoprene-styrene block copolymer, 5-10 parts of tackifying resin, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent, 1-3 parts of an antioxidant and 1-3 parts of a lubricant. The modified asphalt is prepared from, by weight, 1-2 parts of rubber powder, 1-2 parts of oleamide, 2-3 parts of bagasse fibers and 2-10 parts of other functional auxiliaries. The modified asphalt has the advantages of being high in viscosity and elasticity, suitable for various climates and the like.

The invention relates to the field of rubber products, and discloses a preparation method of a high-wear-resistance outsole which comprises the following components in parts by mass: 30-50 parts of natural rubber, 15-30 parts of isoprene rubber, 15-30 parts of butadiene rubber, 5-15 parts of styrene-butadiene rubber, 20-50 parts of reinforcing filler, 0.5-5 parts of a dynamic cross-linking agent, 5-15 parts of a plasticizer, 1-3 parts of a vulcanizing agent and 0.5-2 parts of an accelerant. The preparation method comprises the steps of mixing, calendaring forming, vulcanizing and the like, and the dynamic cross-linking agent and the static vulcanizing agent are mixed in stages to ensure the uniformity of a cross-linked network. The rubber outsole has high wear resistance, high fatigue resistance and excellent dynamic stability, and can be widely applied to the field of high-performance sole manufacturing.

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.

The invention relates to the technical field of adhesives, in particular to a high-fluidity hot melt adhesive for compounding industrial ton bags and a preparation method thereof.The high-fluidity hot melt adhesive is prepared from, by weight, 15-25 parts of compound rubber, 32-40 parts of petroleum resin, 20-35 parts of naphthenic rubber oil, 5-12 parts of liquid rosin resin and 0.2-0.5 part of auxiliaries; the petroleum resin comprises hydrogenated resin and monomer resin; the composite rubber comprises one or two of SIS (styrene-isoprene-styrene) and SEBS (styrene-ethylene-butylene-styrene). By introducing the specific SEBS, the hydrogenated C5 / C9 copolymer resin, the liquid resin and the monomer resin, the prepared ton bag composite adhesive has relatively good coating viscosity, low-temperature initial adhesion compositing property and short-time high-temperature shearing resistance, and can meet the requirements on a spraying process in different use scenes.

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 invention belongs to the technical field of polylactic acid films, and discloses a high-toughness polylactic acid material, a preparation method and a film, the high-toughness polylactic acid material uses raw materials of polylactic acid, a polylactic acid copolymer, hydroxyl-terminated epoxidized trans-1, 4-polyisoprene (HEEUG) and an epoxy group chain extender, has good biodegradability and mechanical properties, is safe and non-toxic, is environment-friendly, and can be used for preparing a high-toughness polylactic acid film. And the processing performance is good. In the melt blending extrusion process, the HEEUG and the polylactic acid are subjected to polycondensation and chain extension reaction, and the compatilizer among the components is increased by the polylactic acid copolymer, so that the strength of the polylactic acid film is jointly improved; by adding the low-molecular-weight HEEUG, the motion ability of PLA molecular chains can be improved, the interchain entanglement effect can be reduced, HEEUG long-chain molecules are uniformly dispersed in a system and serve as a bridge, stress conduction can be well improved, the molecular chains can move more easily, the plasticizing effect is achieved, the PLA molecular chains are easy to orient under the action of force, and the mechanical properties of the PLA are improved. The epoxy group chain extender can promote the molecular chain flexibility effect, and the elongation at break is greatly improved.

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.

Provided is a modified product of a hydrogenated product of a block copolymer that can be added to obtain a resin composition having an excellent balance of mechanical properties such as tensile strength, tensile strain at break, and impact resistance. A modified hydrogenated product of a block copolymer including a polymer block containing a structural unit derived from an aromatic vinyl compound and a polymer block containing a structural unit derived from a conjugated diene compound, in which the conjugated diene compound contains isoprene and a conjugated diene compound other than isoprene; the polymer block has a vinyl bonding amount of 30 mol % or less; the modified hydrogenated product has one, or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and an acid anhydride-derived group, and has a peak top intensity of loss tangent of 0.95 or less and a melt flow rate (MFR) of 0.5 g / 10 min or more.

A tire tread is formed from a vulcanizable rubber composition which includes, expressed by weight per hundred parts of elastomer (phr), 100 phr of an elastomer component, the elastomer component including a polyisoprene rubber and a polydiene rubber in a ratio by weight of at least 1:1, at least 40 phr of a filler component, the filler component comprising carbon black and silica in a ratio, by weight of at least 0.8:1, at least 1 phr of an organosilane coupling agent, at least 1 phr of a hydrocarbon traction resin, a sulfur-based curing agent, and a cure accelerator, the cure accelerator including an ultra-accelerator. The tire tread is suited for use on heavy vehicles, such as trucks and buses.

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.

PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition excellent in gas barrier properties, compression set resistance, and mechanical properties and also excellent in hardness and shrinkage resistance. SOLUTION: A thermoplastic elastomer composition according to the present invention contains at least (a) an isobutylene-isoprene copolymer rubber, (b) a polypropylene polymer, and (c) an ethylene-α-olefin copolymer and is substantially free of plasticizers and softeners.

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 invention relates to the technical field of high polymer materials, and discloses flame-retardant and weather-resistant rare earth butyl isoprene rubber and a preparation method thereof.The preparation method includes the steps that rare earth butyl isoprene rubber, calcium carbonate, modified silane, polyethylene, sulfur-containing modified polyurethane and an antioxidant 626 are added into a stirrer to be evenly mixed, melted and cooled, and the flame-retardant and weather-resistant rare earth butyl isoprene rubber is obtained; the flame-retardant and weather-resistant rare earth butyl isoprene rubber is obtained. In the melting process, isocyanate-terminated in the sulfur-containing modified polyurethane reacts with hydroxyl in modified silane, cross-linking is generated between the isocyanate-terminated in the sulfur-containing modified polyurethane and the hydroxyl in the modified silane, the isocyanate-terminated in the sulfur-containing modified polyurethane and the hydroxyl in the modified silane are wound with rare earth butyl isoprene rubber and polyethylene, so that the isocyanate-terminated in the sulfur-containing modified polyurethane and the hydroxyl in the modified silane are connected more tightly, and the tensile property is improved; a sulfur element, a phosphorus element, a silicon element and a nitrogen element in the sulfur-containing modified polyurethane and the modified silane have good flame-retardant effects and jointly form a flame-retardant system; and meanwhile, the rare earth butyl isoprene rubber disclosed by the invention also has relatively good weather resistance.

The invention relates to a high-temperature-resistant low-compression spinning rubber covered roller and a preparation method thereof.The high-temperature-resistant low-compression spinning rubber covered roller comprises an alloy roller core and a rubber blending material layer, the alloy roller core is wrapped with the rubber blending material layer, and the rubber blending material layer is characterized by comprising, by weight, 50-70 parts of carboxy nitrile rubber; 20 to 30 parts of butyronitrile-isoprene rubber; 10 to 20 parts of phenyl siloxane rubber; 5-10 parts of a nano reinforcing agent; 3 to 10 parts of an antistatic agent; 5-8 parts of zinc oxide; 2-4 parts of an accelerant; 5 parts of titanium dioxide; 1-2 parts of an anti-aging agent; 1-3 parts of a functional auxiliary agent; the antistatic rubber has the advantages that the compression set of the rubber at high temperature is reduced, the antistatic property and the rebound rate of the rubber are improved, the toughness and the hardness are good, serious elasticity attenuation of a rubber roller in the working process is avoided, and the service life of the rubber roller is effectively prolonged.

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 invention discloses a composite pipe and a preparation method thereof, and relates to the technical field of water supply pipes. The composite pipe sequentially comprises an outer layer, a middle layer and an inner layer from outside to inside, raw materials of the outer layer comprise polypropylene random copolymer and composite rubber, and the mass ratio of the polypropylene random copolymer to the composite rubber is (3-9): 1; the composite rubber comprises ethylene propylene rubber, isoprene rubber and nano silicon dioxide, the mass ratio of the ethylene propylene rubber to the isoprene rubber in the composite rubber is (2.3-4): 1, and the mass ratio of the nano silicon dioxide to the composite rubber is (2-3): 10; the raw material of the middle layer is a propenyl block copolymer; the raw materials of the inner layer comprise heat-resistant polyethylene and glass fibers. The composite pipe provided by the invention has excellent mechanical strength and impact resistance.

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.

To provide a rubber composition for tires and a tire which are capable of improving riding comfort during high-speed traveling.SOLUTION: The present invention relates to the rubber composition for tires which contains: a rubber component containing an isoprene rubber, a butadiene rubber, and a styrene-butadiene rubber; and a resin component. (The content of the styrene-butadiene rubber) / ((the content of the isoprene rubber)+(the content of the butadiene rubber))≥2.0 is satisfied.SELECTED DRAWING: None

The invention relates to silyl ether derivatives of certain polyether polymers, and methods of making the same, compositions comprising the same, and methods of using the same. The polyether polymers precursors of said derivatives include, for example, polycitronellol, polyprenol, polyisocitronellol and polyisoprenol.

The invention relates to the technical field of pressure-sensitive adhesive tapes, in particular to a reusable high-temperature viscosity-reducing adhesive tape which comprises a pressure-sensitive adhesive body, the pressure-sensitive adhesive body comprises polyisoprene and tackifying resin, and the tackifying resin can be two or three of petroleum resin, terpene resin and phenolic resin; when the weight part of the polyisoprene is 100 parts, the weight part of the petroleum resin is 0-30 parts; the weight part of the terpene resin is 20 to 60 parts; the weight part of the phenolic resin is 3 to 10 parts. Compared with the prior art, the reusable high-temperature viscosity-reducing adhesive tape has high viscosity at normal temperature, the viscosity of the adhesive tape is greatly reduced during high-temperature processing, the adhesive tape can be easily peeled off when the adhesive tape is still hot, and when the adhesive tape recovers to the room temperature, the viscosity recovers to the level before use, so that the reusable high-temperature viscosity-reducing adhesive tape can be reused for multiple times.

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.