1245 results about "Polyurethane elastomer" patented technology

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-static-rigidity high-damping low-pressure-change polyurethane elastomer and a preparation method thereof. Comprising a polyol component and an isocyanate component, and the polyol component comprises polyol A, a chain extender, a stabilizer, a hydrolysis-resistant agent and a catalyst; the isocyanate component is prepared from isocyanate, polyhydric alcohol B and branched chain unit alcohol; the polyol A comprises amine ether polyol and polytetrahydrofuran ether polyol; the polyhydric alcohol B comprises bio-based hydrolysis-resistant polyhydric alcohol and polytetrahydrofuran ether polyhydric alcohol; the bio-based hydrolysis-resistant polyol is prepared by carrying out a reaction on sebacic acid, 1, 2-propylene glycol and 1, 4-butanediol; the branched-chain unit alcohol is prepared from tetrahydrofuran and isooctanol through a reaction. By introducing the bio-based hydrolysis-resistant polyhydric alcohol and branched chain monohydric alcohol, the damping effect is remarkably enhanced, and on this basis, through formula adjustment and raw material screening, the product toughness is greatly improved, the compression set is reduced, and the performance of the product in heavy haul railway application is effectively optimized.

The present invention relates to the technical field of regenerated plastics, and in particular relates to a flame-retardant regenerated plastic and a preparation method therefor. The regenerated plastic comprises the following specific components: 90-100 parts of regenerated high-density polyethylene, 5-10 parts of high-density polyethylene, 1-2 parts of calcium stearate, 1-2 parts of carbon black, 8-12 parts of maleic-anhydride-grafted polyethylene, 2-3 parts of an antioxidant, and 6-8 parts of a polyurethane elastomer. The regenerated high-density polyethylene is used as a main material, the high-density polyethylene is added thereto, the maleic-anhydride-grafted polyethylene is used as a compatibilizer, and then polyhydroxy polybutadiene, epoxidized hydroxyl-terminated polybutadiene and polypropylene oxide glycol are compounded and react with diphenylmethane diisocyanate to generate a polyurethane elastomer, thereby toughening the regenerated polyethylene; moreover, a flame-retardant effect is achieved by means of the synergy of phosphorus and nitrogen; therefore, a regenerated polyethylene plastic with high tensile strength and good flame-retardant performance is prepared. The regenerated plastic can be widely used in a plurality of fields, and has a relatively high level of practicability.

The invention discloses a preparation method of a non-additive nitrogen-phosphorus-cerium synergistic flame-retardant polyurethane elastomer, and the polyurethane elastomer is prepared by taking isocyanate as a hard segment and poly (1, 4-butanediol adipate) as a soft segment, and compounding the hard segment and the soft segment with 2-amino-4-hydroxy-6-methylpyrimidine, a phosphorus reactive flame retardant and cerium oxide. The preparation method is simple, the process is easy to control, and the prepared polyurethane elastomer has good tensile strength; besides, the limit oxygen index of the polyurethane elastomer reaches 27.4, the polyurethane elastomer meets commercial standards of flame-retardant materials and UL-94 V-0 flame-retardant grade requirements, the ultraviolet band light transmittance is 0%, ultraviolet rays can be completely isolated, and the polyurethane elastomer has a good anti-oxidation function and can be applied to the industries of wires, cables, pipe profiles, films, general molding and the like.

The invention relates to a modified polyurethane elastomer and application of the modified polyurethane elastomer in preparation of bimodal cellular structure foam, and belongs to the technical field of foam forming. The invention provides a modified polyurethane elastomer. The modified polyurethane elastomer comprises the following components: a thermoplastic polyurethane elastomer, a polyisocyanate-based chain extender and an antioxidant component, in the modified polyurethane elastomer, the mass ratio of the thermoplastic polyurethane elastomer to the polyisocyanate chain extender to the antioxidant component is 1: (0.01-3): (0.05-1). According to the modified polyurethane elastomer, non-uniform chain extension modification is carried out on the thermoplastic polyurethane elastomer by introducing an insufficient amount of a polyisocyanate group chain extender, and the thermoplastic polyurethane elastomer foam obtained by foaming the modified polyurethane elastomer has a bimodal (big and small holes) foam structure; and the material has various excellent performances of light weight, heat insulation, sound insulation, buffering, high resilience and the like.

The invention discloses a halogen-free flame-retardant TPU (thermoplastic polyurethane) cable material and a preparation method thereof, belongs to the technical field of TPU processing, and aims to solve the technical problem that the wear resistance and flame retardance of a TPU cable material in the prior art need to be further improved. The TPU cable material is prepared from the following raw material components in parts by weight: 80 to 100 parts of polyurethane elastomer, 1 to 2 parts of antioxidant, 1 to 3 parts of stabilizer, 10 to 15 parts of plasticizer, 10 to 20 parts of filler and 5 to 10 parts of flame-retardant glass powder. The TPU cable material is obtained by blending, melting and extruding the polyurethane elastomer, the flame-retardant glass powder and auxiliary materials; during combustion, flame-retardant groups in the polyurethane elastomer and the flame-retardant glass powder are decomposed to promote carbonization of triazine groups in the polyurethane elastomer to obtain a flame-retardant layer, and the TPU cable material is flame-retardant, wear-resistant, stretch-resistant, high-temperature-resistant and more environment-friendly through crosslinking of organic chain segments and synergistic cooperation of functional groups.

The invention belongs to the technical field of polyurethane materials, and provides a high-damping anti-fatigue and anti-aging polyurethane elastomer and a preparation method thereof. The high-temperature-resistant polyurethane elastomer is prepared from the following raw materials in parts by weight: 20 to 30 parts of poly (diethylene glycol adipate) glycol (PDA), 30 to 50 parts of polytetrahydrofuran ether glycol (PTMEG), 5 to 15 parts of chain extender, 0.1 to 0.3 part of A33, 0.1 to 0.2 part of organic tin catalyst, 2 to 5 parts of hindered phenol antioxidant, 1 to 3 parts of hindered amine light stabilizer, 3 to 8 parts of nano particles and 30 to 50 parts of isocyanate prepolymer. The isocyanate prepolymer is prepared from 1, 4-phenyl diisocyanate (PPDI) and branched chain-containing polytetrahydrofuran glycol PTXG according to a mass ratio of 1: (1.8 to 2.2). The polyurethane elastomer is excellent in damping performance and fatigue aging resistance, and meets the use requirements under complex working conditions.

The invention relates to the technical field of synthetic fibers, in particular to a high-elasticity textile fiber and a preparation process thereof. The high-elasticity textile fiber is prepared from the polyurethane-polyamide elastomer and the modified diatomite master batch through melt spinning, drafting and winding. According to the invention, hydroxyl-terminated polydimethylsiloxane is used as polyol, and the molar ratio of the polyurethane prepolymer to the polyamide prepolymer is controlled, so that the prepared polyamide-polyurethane elastomer slice has good heat resistance; the molar ratio of isocyanate to polyol and the molar mass ratio of caprolactam to adipic acid are controlled, so that the prepared textile fiber is excellent in mechanical property; 2, 2-dimethylolpropionic acid is used for a chain extension reaction, the molar ratio is controlled, the moisture regain of the prepared textile fiber is 8.58%, and the moisture absorption is high; the diatomite is modified by the quaternary ammonium salt compound, and the addition proportion is adjusted, so that the prepared spinning fiber has good antibacterial performance.

Disclosed herein is a method of making a composite fabric for use in or as a medical implant component, the method comprising steps of providing a textile comprising at least one strand having titer of 2-250 dtex and comprising fibers made from a biocompatible and biostable synthetic polymer; determining locations on the textile where a cut is to be made for an intended use of the textile; optionally pretreating the textile at least at the determined locations on at least one side of the textile with a high-energy source to activate the surface; solution coating the textile at least at a determined location with a coating composition comprising a biocompatible and biostable polyurethane elastomer and a solvent for the polyurethane; removing the solvent from the coated textile; and laser cutting the coated textile as obtained at least a one coated location with an ultra-short pulse laser; to result in a composite biotextile wherein polyurethane is present in an amount of 2.5-90 mass % based on composite biotextile and polyurethane is present at least at a laser-cut edge. Such composite biotextile as made shows an advantageous combination of good biocompatibility, especially hemocompatibility, high strength and pliability, and has well-defined regular edges that have high suture retention strength. Further embodiments concern the use of such composite biotextile in or as medical implant component for an implantable medical device; such as in orthopedic applications and cardiovascular implants. Other embodiments include such medical devices or implants comprising said composite biotextile or medical implant component.

The invention relates to the technical field of inorganic non-metallic materials, in particular to a quaternized cholic acid polyurethane modified polyvinyl chloride material, a preparation method and application. The quaternized cholic acid polyurethane polymer is based on a polyurethane elastomer developed by using cholic acid molecules with a rigid skeleton as a hard segment unit and flexible oligomeric ethylene glycol as a soft segment unit, hydroxyl on cholic acid polyurethane is quaternized to prepare cation modified cholic acid polyurethane, and the cation modified cholic acid polyurethane simulates amphiphilic characteristics of natural peptides. The quaternized cholic acid polyurethane is introduced into a polyvinyl chloride (PVC) matrix as an antibacterial agent, so that the growth of microorganisms such as bacteria and molds can be effectively inhibited, the antibacterial property is achieved, bacteria breeding on the inner surface of a pipeline is avoided, and the composite material is endowed with better biocompatibility and antibacterial property; meanwhile, the quaternized cholic acid polyurethane can effectively improve the strength and toughness of the PVC material; wide application prospects are realized.

The invention relates to a self-repairing waterborne polyurethane composite elastomer based on dynamic interface reinforcing and toughening as well as a preparation method and application thereof, and belongs to the technical field of self-repairing high polymer materials. The method comprises the following steps: preparing a waterborne polyurethane emulsion; the preparation method comprises the following steps: uniformly dispersing polyvinylpyrrolidone in an ethanol solution, adding polyfunctional mercaptan and polyfunctional isocyanate, and adding an amino-containing imidazole monomer to obtain microsphere powder; and uniformly dispersing the microsphere powder in a waterborne polyurethane emulsion, adding a metal salt solution, and then volatilizing water to form a film material, thereby obtaining the self-repairing waterborne polyurethane composite elastomer based on dynamic interface reinforcement and toughening. The self-repairing waterborne polyurethane elastomer with excellent comprehensive performance is obtained by designing the structure of waterborne polyurethane, modifying the surface of the microsphere and introducing a dynamic interface for compounding, and the strength, the toughness and the self-repairing capability of the elastomer are simultaneously improved.

The invention relates to a high-performance room-temperature self-repairing polyurethane elastomer and a preparation method thereof.The polyurethane elastomer is synthesized from diisocyanate containing asymmetric aliphatic rings, polyether glycol or polyester glycol and a dynamic hydrogen bond chain extender, linear and non-linear hydrogen bonds exist in a polyurethane molecular chain at the same time, and the linear and non-linear hydrogen bonds are different from each other. The existence of the linear hydrogen bonds endows the material with good mechanical properties, the non-linear hydrogen bonds also enable the polyurethane elastomer to maintain the strength and realize the self-repairing effect at room temperature, and the high steric hindrance of the asymmetric aliphatic ring structure can inhibit the crystallization of the polyurethane chain segment, thereby enhancing the transparency of the polyurethane. Compared with the prior art, the polyurethane elastomer prepared by the invention has excellent tensile property, tensile strength of more than 30MPa, fracture strain of more than 1000%, good self-repairing property, repair efficiency of more than 80% after repairing for 48 hours at room temperature under the assistance of trace water, and good transparency.

The invention relates to the technical field of polymer room-temperature phosphorescent materials, in particular to a self-repairing room-temperature phosphorescent elastomer based on waterborne polyurethane and a preparation method and application thereof, and the specific preparation steps include: 1) synthesis of self-repairing waterborne polyurethane and 2) preparation of a self-repairing room-temperature phosphorescent waterborne polyurethane elastomer material. A self-repairing waterborne polyurethane elastomer material is taken as a polymer matrix for constructing a rigid network, and is combined with various micromolecular organic light-emitting units through physical doping, so that the self-repairing room-temperature phosphorescent waterborne polyurethane elastomer material with strong self-healing capability, excellent optical performance and good mechanical tensile property is obtained.

The invention discloses an anti-skid and noise-reduction multifunctional road hot melt coating and a gradient forming process thereof, and relates to the technical field of hot melt coatings. Comprising the following components in percentage by mass: 25-28wt% of bio-based resin, 8-12wt% of a noise reduction material, 15-20wt% of nano composite rubber particles and 5-8wt% of internally mixed reflective glass beads. The bio-based resin is used as a base material of the hot melt coating, the superfine bamboo fibers and the polyurethane elastomer are combined to serve as noise reduction materials, and honeycomb-shaped pores with the diameter of 0.1-1 micron exist in the superfine bamboo fibers, so that a coating produced by construction of the hot melt coating has good noise reduction performance; meanwhile, coarse-grade glass beads and fine-grade glass beads are introduced into the material, the coarse-grade glass beads provide basic light reflection, gaps are filled with the fine-grade glass beads to form a compact reflection layer, the coarse-grade glass beads and the fine-grade glass beads synergistically act to enable incident light to generate a composite effect of diffuse reflection and specular reflection, the retroreflection coefficient of the coating is increased by utilizing the effect, the light reflection performance in rainy days is further improved, and the safety is improved; and the hot-melt coating mostly adopts an environment-friendly material, is easy to degrade and is beneficial to environment protection.

The invention belongs to the technical field of polymer materials and electric wires and cables, and discloses a high-insulating-property composite cable and a preparation method thereof. The preparation method comprises the following steps: carrying out copolymerization reaction on hydroxyl-terminated hydrogen-containing polysiloxane, dihydric alcohol and diisocyanate to obtain an organic silicon modified polyurethane elastomer solution; then adding a vinyl cross-linking agent to carry out a cross-linking reaction, and after the reaction is completed, drying and granulating to obtain organic silicon modified polyurethane elastomer granules; uniformly mixing the elastomer granules with PE, EVA and reinforcing filler, extruding into a mold in which a metal wire is placed, coating, curing and forming to obtain an insulating layer; and finally, mixing nylon slices and color master batch, and coating the mixture on the surface of the insulating layer by injection molding for curing and forming to obtain the composite cable with high insulating property. The insulating layer adopts a specific TPE material to carry out blending modification on PE, so that the strength, the toughness and the thermal aging resistance of the insulating layer can be remarkably improved, and relatively high insulating performance can be maintained.

The invention discloses a preparation method of a photoresponsive self-cleaning optical coating with a dynamic self-repairing function. The preparation method comprises the following steps: adding a monomer containing a Diels-Alder reaction bond into a polyurethane prepolymer, and reacting to obtain the polyurethane elastomer with self-repairing capability. An azobenzene derivative is connected to a polyurethane elastomer through a covalent bond, and the photoresponsive self-repairing polymer is obtained. Hydrophobically modified TiO2 nanoparticles are prepared in situ through a sol-gel method. In order to further improve the dispersity of the TiO2 nanoparticles in the polymer, a silane coupling agent is adopted to carry out surface modification on the TiO2 nanoparticles. The preparation method comprises the following steps: mixing a photoresponsive self-repairing polymer and a TiO2 nanoparticle dispersion liquid in proportion, uniformly stirring, coating the mixed liquid on the surface of a base material, forming a uniform coating through a brush coating or spray coating method, and curing the coating at a proper temperature. Due to the excellent characteristics of light response self-repairing, ultraviolet resistance, wear resistance and the like, the coating can keep a long transparent period and good antifouling durability in an outdoor environment.

The invention discloses a high-toughness flame-retardant polyurethane cable insulation layer material and a preparation method and application thereof.According to the preparation method, firstly, a phosphorus-containing compound is grafted to polyhydric alcohol, molecular-level uniform dispersion of flame-retardant elements is achieved, and meanwhile the problems that a traditional additive type flame retardant is prone to migration and precipitation and deteriorates the mechanical property of polyurethane are solved; then polymerizing with a diisocyanate monomer and a chain extender, and then extruding and granulating with an antioxidant, a layered nano filler and a maleic anhydride grafted toughening agent through a double-screw extruder to obtain the polyurethane elastomer. The prepared polyurethane cable insulation layer material has the advantages of no halogen, environmental protection, high flexibility, excellent flame retardant property and the like. Besides, the strong polarity of the maleic anhydride grafted flexibilizer and the twin-screw extrusion process can promote the uniform dispersion of the layered nanofiller, so that not only are the flexibility and impact resistance of the material improved, but also the flame-retardant effect is further enhanced through the synergistic effect of the nanofiller, and the material has a wide application prospect in the field of wires and cables.

The invention relates to the technical field of power equipment, and discloses a wind power generation torsion-resistant flexible cable, which comprises a cold-resistant torsion-resistant outer covering sleeve body, an ethylene propylene rubber insulating layer sleeve body is arranged in the cold-resistant torsion-resistant outer covering sleeve body, a torsion-resistant reinforced layer sleeve is arranged in the ethylene propylene rubber insulating layer sleeve body, and the torsion-resistant reinforced layer sleeve comprises a copper conductor core body group. A reinforcing core body group is arranged in the copper conductor core body group; the cold-resistant torsion-resistant outer covering sleeve body comprises a polyurethane elastomer sheath and an aramid fiber embedded sleeve, and the aramid fiber embedded sleeve is embedded in the inner wall of the polyurethane elastomer sheath and wraps the ethylene propylene rubber insulating layer sleeve body. The torsion-resistant quality of the guide core wire structure, the insulation sleeve structure and the cold-resistant outer sleeve structure is reinforced, and the torsion-resistant quality of the outer cold-resistant outer sleeve structure with the largest bearing stress during bending is greatly improved, so that the torsion-resistant and tensile quality of the whole cable is improved, and the cold-proof and wear-resistant protection effects of the outer sleeve structure are guaranteed.

The invention discloses a vegetable oil-based room-temperature water-induced self-healing polyurethane elastomer and a preparation method thereof. The elastomer is prepared by taking polytetramethylene ether glycol and tung oil glycol as soft segments, isophorone diisocyanate as a hard segment, dimethylolpropionic acid as a hydrophilic chain extender and 3-aminophenylboronic acid as an end-capping reagent. Polytetramethylene ether glycol and tung oil glycol are used as soft segments, isophorone diisocyanate is used as a hard segment, dimethylolpropionic acid is used as a hydrophilic chain extender, 3-aminophenylboronic acid is used for blocking, then triethylamine is used for neutralization, and a waterborne polyurethane material with high-density crosslinking sites is synthesized. The material has good mechanical properties and fracture toughness, the tensile strength of the polyurethane film can reach 6.94 MPa, the elongation at break can reach 790.1%, and the film has good rebound resilience.

The invention discloses a special module for cooling forming of a polyurethane elastomer and a cooling method of the special module. The cooling method comprises the following steps that the polyurethane elastomer is pretreated, a partition heating strategy is adopted to ensure that the temperatures of materials are consistent, the preheated materials are placed into a mold, the temperatures of all areas are dynamically adjusted through a mold temperature control system, and the materials are cooled to be uniform; a three-stage cooling strategy is implemented, the flow and the flow speed of cooling liquid are gradually adjusted in the initial stage, the transition stage and the balance stage so as to balance the temperature inside and outside the mold, the self-adaptive cooling control technology is adopted for complex geometric and thin-wall structures, and the flow of the cooling liquid is dynamically adjusted according to wall thickness and temperature data monitored in real time; and the cooling efficiency is optimized through a cooling liquid circulating and reusing mechanism, and the temperature of the mold is adjusted and residues are cleared away after cooling is completed through an intelligent temperature control system. The invention provides an efficient, energy-saving and accurate cooling forming method which is suitable for production of polyurethane elastomers.

The invention relates to the technical field of composite boards, and discloses a scratch-resistant PE composite board and a preparation method thereof. The PE composite board is prepared by taking high-molecular-weight polyethylene, low-density polyethylene and medium-density polyethylene as main raw materials, adding functional aids such as a reinforcing filler, a modified polyurethane elastomer and molybdenum disulfide, and carrying out processes such as banburying, hot press molding and cold press molding. Due to the addition of the reinforcing filler, the mechanical property and the surface hardness of the matrix are improved, and the scratch resistance is further improved; the modified polyurethane elastomer is introduced into the matrix as a toughening component, so that not only is the toughness of the matrix improved, but also the scratch resistance of the matrix is improved; due to introduction of molybdenum disulfide, the unique layered structure of molybdenum disulfide can be utilized, the friction coefficient of the matrix is reduced, and then the scratch resistance of the matrix is improved.

The invention discloses an epoxy resin tack coat oil material suitable for a steel bridge deck, which constructs a multi-scale toughening composite system through the synergistic effect of an epoxy-terminated polyurethane elastomer toughening agent (molecular-scale chemical grafting) and a nano-scale elastomer filler (nano dispersion toughening), and solves the problem of rigidity-flexibility imbalance of the traditional epoxy tack coat oil. The material has the advantages of fast curing (surface drying at 25 DEG C is less than or equal to 4 hours), high toughness (the elongation at break is greater than or equal to 250%) and excellent weather resistance (the performance retention rate is greater than or equal to 85% after ultraviolet aging for 500 hours), and is suitable for interlayer interface bonding of steel bridge deck pit slot and crack repair. According to the preparation method, uniform dispersion and interface chemical bonding of the nanofiller are achieved through a segmented stirring process, the comprehensive performance of the material is remarkably improved, and the important engineering application value is achieved.

The invention discloses a self-repairing recoverable creep-resistant polyurethane elastomer and a preparation method thereof.The polyurethane elastomer is obtained by polymerizing a chain extender, diisocyanate, macromolecule dihydric alcohol / amine and a cross-linking agent according to the mass ratio of (2-15): (4-30): (30-90): (2-15), the obtained self-repairing recoverable creep-resistant polyurethane elastomer is cut into small blocks, the small blocks are subjected to heat preservation at the temperature of 180 DEG C and the temperature of 80 DEG C, and the self-repairing recoverable creep-resistant polyurethane elastomer is obtained. And carrying out hot press molding again under the condition of 30 MPa, so that 65% of mechanical properties of the obtained polyurethane can be recovered. A urea group in the dynamic polyurethane can be subjected to an exchange reaction at a high temperature, and the polyurethane elastomer containing the urea group can be recycled at the high temperature by utilizing the characteristic of the urea group. The chiral cyclic diamine used in the invention has a single spatial configuration, provides a hard chain segment for the polyurethane elastomer, and improves the mechanical properties and high-temperature creep resistance of the polyurethane elastomer.

The invention discloses a polyurethane elastomer for sealing and a preparation method thereof, and relates to the technical field of polymer materials, the polyurethane elastomer comprises polyether polyol, diisocyanate, a catalyst, a cross-linking agent, a stabilizer and a plasticizer; the polyurethane elastomer further comprises additives, the additives specifically comprise functionalized graphene oxide, an ionic liquid toughening agent, self-repairing microcapsules and a carbon quantum dot toughening agent, and the polyurethane elastomer is prepared based on the materials. According to the polyurethane elastomer for sealing and the preparation method thereof, the sealing property, the tensile property, the wear-resisting property and the self-repairing property of the material are remarkably improved. The functionalized graphene oxide, the ionic liquid toughening agent, the self-repairing microcapsule and the carbon quantum dot toughening agent are introduced into the polyurethane, so that the excellent performance of the polyurethane elastomer in high-stress, high-abrasion and damage environments is realized. The polyurethane elastomer not only has lower leakage rate and higher tensile strength, but also can be quickly self-repaired after being worn.

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a hollow glass bead / TPU composite material for an air bag of a life jacket and a preparation method of the hollow glass bead / TPU composite material. The polyurethane resin is prepared from the following raw materials in percentage by mass: 48%-61% of polyether glycol, 28%-33% of diisocyanate, 5%-9% of a mixed chain extender, 0.2%-0.4% of a hydrolysis-resistant agent, 0.3%-0.5% of an antioxidant, 0.2%-0.4% of a catalyst and 5%-9% of modified hollow glass beads. The TPU material is firm, durable and not prone to damage, the buoyancy of the TPU material is improved through the modified hollow glass beads, and meanwhile the binding force of the hollow glass beads and TPU is increased. The invention also provides a preparation method thereof.

The invention belongs to the technical field of preparation of polyurethane elastomers, and discloses a water-resistant self-repairing polyurethane elastomer, a preparation method thereof and application of the water-resistant self-repairing polyurethane elastomer in a humidity sensor. The method comprises the following steps: S1, dissolving 4, 4 '-diaminodiphenylmethane and p-hydroxybenzaldehyde in absolute ethyl alcohol, and carrying out a Schiff base reaction to generate micromolecular MDOH with an imine bond structure, which is used as a chain extender of polyurethane; s2, reacting hydroxyl-terminated polybutadiene with isophorone diisocyanate at 60 DEG C to generate a prepolymer, and adding MDOH and glyceryl monostearate into the obtained prepolymer for chain extension; mDOH is introduced, so that the material has excellent self-repairing capability, and glyceryl monostearate is beneficial to further improving the self-repairing capability and water resistance. In addition, the humidity sensor based on the polyurethane elastomer can show good sensing performance.

The invention belongs to the technical field of chemical engineering and medicines, and particularly relates to polyether polyol of high-molecular-weight sucrose and a synthesis method of the polyether polyol. The average molecular weight of the sucrose polyether polyol is 5000-10000, adding an initiator, namely a mixture consisting of sucrose, small molecular alcohol and water, and an alkali metal catalyst into a reactor, heating, and introducing epoxide to carry out polymerization reaction; preserving heat, curing, heating and dehydrating; introducing epoxide for polymerization reaction, and adding water and an adsorbent for refining to obtain a refined polyether polyol stub bar; the preparation method comprises the following steps: adding a refined polyether polyol material head, DMC and an acidic material into a container, heating for dehydration, introducing epoxide for polymerization reaction, and adding water and an adsorbent for refining to obtain the polyether polyol of high molecular weight cane sugar. The sucrose polyether with the ultra-high molecular weight can be synthesized, is narrow in molecular weight distribution, high in functionality and stable in storage, and is applied to the fields of semi-rigid foam polyurethane, polyurethane elastomers and the like, or applied to micromolecule inclusion, recognition and slow release in the fields of medicines and foods.

The invention belongs to the technical field of polyurethane elastomers, and discloses a high-strength room-temperature self-repairing lignin / polyurethane composite elastomer as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, gradually polymerizing long-chain dihydric alcohol, irregular isocyanate, a hydrazide chain extender and a dioxime chain extender to obtain a polyurethane matrix with multiple dynamic bonds, and then introducing high-rigidity lignin and metal ions to prepare the lignin-reinforced polyurethane composite elastomer. The lignin / polyurethane composite elastomer prepared by the invention has the characteristics of good compatibility, high strength, room-temperature self-repairing and repeatable hot working, and overcomes the problems that a common lignin-based polyurethane elastomer is poor in compatibility, and the high strength and low-temperature self-repairing cannot be realized at the same time.

The invention relates to the field of polyurethane film materials for batteries, and discloses a TPU composite material for a new energy battery and a preparation method of the TPU composite material. A TPU composite material for a new energy battery is composed of a cloth film layer, an adhesive film layer and a TPU film layer, the TPU film layer is prepared by melting and casting TPU hot melt adhesive, and the TPU hot melt adhesive is prepared from the following raw materials in parts by weight: 60-80 parts of polyurethane elastomer, 20-30 parts of a toughening aid, 15-25 parts of a flame retardant, 8-15 parts of a heat conducting agent, 2-4 parts of a lubricant and 1-3 parts of an antioxidant; the toughening auxiliary agent is prepared from a POE (Polyolefin Elastomer), long carbon chain alkyl glycidyl ether, dibutyl itaconate and a vinyl dimethyl terminated dimethyl-methyl trifluoropropyl polysiloxane copolymer. The TPU composite material disclosed by the invention is applied to a new energy battery, has relatively good buffering and damping effects and puncture resistance, and is good in flame retardance and thermal conductivity.

The invention relates to a multi-dynamic room-temperature self-repairing polyurethane elastomer and a preparation method thereof, and belongs to the field of polyurethane materials, and the multi-dynamic room-temperature self-repairing polyurethane elastomer has high tensile strength of 26.8 MPa on the basis of self-repairing at room temperature. The material can realize efficient self-repairing under a mild room temperature condition, and the tensile strength of the material can be recovered to 15.4 MPa. In addition, the damping performance of the polyurethane elastomer material is excellent, and the damping factor is larger than 0.3 in the temperature range close to 80 DEG C. Ketoxime-urethane dynamic chemical bonds which are dynamically reversible at room temperature are introduced into polyol, so that the polyurethane material is endowed with room-temperature self-repairing capability; and the multi-dynamic chemical structure increases friction in a polyurethane molecular chain, promotes phase separation, and improves the damping performance of the material while improving the mechanical property.

The present invention relates to polyurethane elastomers, obtainable or obtained from the reaction of at least one NCO-terminated prepolymer (A), at least one polyol mixture (B), obtainable or obtained by mixing at least one polyester (B1) having a number average molecular weight (Mn) in the range of 900 g / mol to 3000 g / mol and a hydroxyl functionality of ≥1.7 and ≤4, wherein Mn has been determined by gel permeation chromatography and (B2) at least one carbodiimide (B2), at least one chain extender (C), wherein the polyol mixture (B) was stored for at least 4 weeks at 23° C. after mixing of (B1) and (B2), a process for the manufacturing of those polyurethane elastomers, a kit-of-parts and to the use of those polyurethane elastomers.