85 results about "Polyurethane elastomer" patented technology

The application provides an antistatic flexible connection and a preparation method, and the antistatic flexible connection comprises a flange and a connecting piece connected with the flange, and the connecting piece is composed of a middle buffer layer and antistatic functional layers arranged on both sides of the middle buffer layer; the antistatic functional layer is composed of the following components in parts by weight: 5-10 parts of a conductive polymer, 2-5 parts of an interface modifier, 1-3 parts of a self-made antioxidant, 35-45 parts of inorganic filler modified polyurethane elastomer, 10-18 parts of functional fillers, 3-6 parts of fluorosilicone, 5-9 parts of melamine cyanurate, 8-12 parts of nano kaolin and 2-5 parts of polyethylene glycol diacrylate. Through reasonable collocation and synergistic effect of the components, the antistatic flexible connection has excellent performance in antistatic property, mechanical property, flame retardancy, aging resistance and the like, and meets the use requirements under complex working conditions.

The present application relates to the technical field of high polymer composite material, and particularly discloses a liquid nitrogen resistant ultra-low temperature thermoplastic composite film and a preparation method thereof. The film is prepared from the following raw materials: 50-70 parts of thermoplastic polyurethane elastomer, 15-30 parts of polycaprolactone, 2-12 parts of composite reinforcing filler, 2-5 parts of compatibilizer, 1-3 parts of ultra-low temperature toughening agent, and 0.5-1 part of antioxidant. The composite reinforcing filler comprises nanocellulose crystals. The present application also discloses a preparation method of the composite film, which comprises the steps of drying the raw materials, premixing, melt blending and extruding, casting film forming, and annealing treatment. The film has the following advantages: 1) through the optimization design of the thermoplastic polyurethane elastomer, PCL and the composite reinforcing filler, the composite film has excellent flexibility and mechanical strength at the temperature of liquid nitrogen; 2) through the synergistic effect of the composite reinforcing filler, a new gas barrier mechanism is constructed, and the oxygen permeation rate is reduced by more than 80%; and 3) the preparation method is simple and suitable for industrialized mass production.

This invention provides an experimental device for friction and wear testing of an artificial knee joint, belonging to the field of material friction and wear technology. It includes a lifting module, with a femoral clamping module at its top. The femoral clamping module contains a polyurethane elastomer sealed chamber, and a tibial clamping module is connected below this chamber. An intelligent temperature-controlled circulating hydraulic pump is located on one side of the polyurethane elastomer sealed chamber. This invention achieves reciprocating motion through a reversing valve control. Combined with sub-millimeter precision adjustment of the hydraulic actuator and differentiated installation positions, it realizes high-precision flexion, extension, and torsional movements of the artificial knee joint. A stable base load is provided by a central hydraulic loading module, while the unnecessary torque from the dual electromagnetic loading modules cancels each other out. Simultaneously, instantaneous impact force is superimposed on the stable hydraulic load through instantaneous power switching, enriching the loading methods of the experimental device for friction and wear testing of an artificial knee joint.

The application discloses a high-elongation-strength anti-fatigue TPU blended material and a preparation method thereof, and relates to the field of polymer materials. In the preparation of the high-elongation-strength anti-fatigue TPU blended material, phosphorus chloride is reacted with 4'-vinyl-[1,1'-biphenyl]-4-alcohol and p-phenylphenol to obtain a phosphite antioxidant; nano-silicon dioxide is sequentially reacted with trimethoxysilane and the phosphite antioxidant to obtain modified silicon dioxide; a modified polyurethane elastomer is prepared by reacting hydroxyl-terminated polysiloxane, 1,4-butanediol, isophorone diisocyanate and adipic dihydrazide; polyether amide elastomer and the modified polyurethane elastomer are mixed, mixed with a compatilizer, modified silicon dioxide and antioxidant 1010, dried, mechanically mixed, and melt-blended to obtain the high-elongation-strength anti-fatigue TPU blended material. The high-elongation-strength anti-fatigue TPU blended material prepared by the application has the abilities of self-repairing, durability and flame resistance.

The application relates to the field of polyurethane foaming materials, and particularly discloses a high-performance polyurethane elastomer for a high-rebound motor vehicle seat and a preparation method thereof, and the high-performance polyurethane elastomer for the high-rebound motor vehicle seat comprises the following components in parts by weight: polyether polyol 60-80 parts, a curing agent 40-60 parts, a foaming agent 1-2 parts, a catalyst 0.5-1 part, a chain extender 3-6 parts, a plasticizer 1-2 parts, a stabilizer 0.5-1 part, nano filler 2-6 parts, nano connecting material 1-4 parts and a flame retardant 1-2 parts; the preparation method comprises the following steps: uniformly mixing the polyether polyol, the nano connecting material, the nano filler and the flame retardant, then uniformly mixing and stirring the plasticizer, the chain extender and the stabilizer, finally uniformly mixing the foaming agent and the catalyst, defoaming, and obtaining a mixture; uniformly mixing the mixture and the curing agent, pouring into a mold, then performing a curing treatment, and obtaining a finished product; the finished product has the advantages of good rebound elasticity, good compression deformation resistance, good moisture and heat resistance and good tear resistance.

This invention discloses a bio-based elastomer, belonging to the field of new materials technology. The low-temperature self-healing bio-based polyurethane elastomer of this invention consists of soft segments and hard segments. The soft segments are composed of hydroxyl-terminated aliphatic prepolymers and semi-crystalline polymer polycaprolactone diol, while the hard segments include isocyanates and chain extenders. A bio-based polyester prepolymer with an amorphous structure and compliant long chains is prepared by multi-component copolymerization. Lowering its glass transition temperature yields a prepolymer with low-temperature resistance potential. Using the semi-crystalline polycaprolactone diol as part of the soft segments, a dynamic layered domain can be constructed through a crystal-locked dynamic network, serving as a rigid filler to reinforce the elastomer. Simultaneously, a rich network of hydrogen bonds, urethane esters, and disulfide bonds is introduced into the elastomer, endowing it with low-temperature self-healing properties, thus producing a polyester-type low-temperature self-healing bio-based elastomer constructed using a multi-dynamic network.

This invention discloses a high-strength, tough, and antibacterial polyurethane elastomer and its preparation method. Using polyols as soft segments, isocyanates as hard segments, plant polyphenolic polyols as chain extenders, and iron salts as ligands, a high-performance polyurethane elastomer based on metal ion coordination is prepared. Due to the synergistic effect of the reversible breakage-reorganization mechanism of the dynamic coordination bonds between iron ions and phenolic hydroxyl groups and the separation of the polyurethane microphase, this polyurethane elastomer exhibits excellent mechanical properties. Furthermore, although iron ion coordination reduces the DPPH scavenging rate from 94.17% to 88.89%, it significantly enhances the photothermal conversion performance of the material. After irradiation with 808 nm near-infrared light, the PU-DVO-Fe... 1 / 4 Polyurethane achieved 100% antibacterial rate against both E. coli and S. aureus.

This invention provides an integrated, interconnected ship collision avoidance device. A flat slot is provided on the upper layer of a polyurethane elastomer, with the slot opening located on the side of the polyurethane elastomer. A collision avoidance plate is fixed inside the slot. The polyurethane elastomer has a hollow structure, with a first cavity and a second cavity arranged in a triangular prism shape along either the transverse or longitudinal direction. Both the first and second cavities have triangular cross-sections, with the apex of the first cavity facing upwards and the apex of the second cavity facing downwards. The first and second cavities are staggered. This ship collision avoidance device, employing a collision avoidance plate combined with a triangular cell cavity structure, can achieve integrated operation under impact or shock of localized high stress, improving energy absorption efficiency and thus protecting the ship.

The application belongs to the technical field of polyurethane elastomers, and particularly relates to a low-density solvent-resistant anti-shrinkage polyurethane microcellular elastomer as well as a preparation method and application thereof. The low-density solvent-resistant anti-shrinkage polyurethane microcellular elastomer comprises components A and B. The component A comprises the following raw materials: polyester polyol P1, polyester polymer polyol P2, polyester polyol grafted modified silicon dioxide, a chain extender, a leveling agent, a uniform foaming agent, a foaming agent and a catalyst. The component B comprises the following raw materials: polyester polyol P1, a polyether polyol and isocyanate. The application solves the problem of agglomeration of nanoparticles in a full-water foaming system, so that the nanoparticles can migrate to the mold interface together with the leveling agent in the foaming process, and a dense skin layer is jointly constructed. The polyurethane microcellular elastomer prepared by the application has low density, and has thick skin and excellent support. After paint spraying treatment, there are no dimples and air holes, and the polyurethane microcellular elastomer does not shrink after high-temperature heating.

The application belongs to the technical field of water-absorbing materials, and relates to a preparation method and application of a non-isocyanate polyurethane (NIPU) elastomer. The preparation of the NIPU elastomer is to react hydrophilic cyclic carbonates with hyperbranched polyamines, and after the reaction is completed, swelling and aging treatment are performed to obtain the NIPU elastomer with hydrophilic transmission channels and high-efficiency mass transfer networks. The NIPU elastomer prepared by the application can efficiently extract water from a water / C2-C4 low-carbon alcohol mixture, the obtained low-carbon alcohol has a purity of >99.5%, and the NIPU elastomer has high mechanical strength, and when the water absorption is 4.5 times the self weight, the structure is still complete, and high alcohol / water selectivity is maintained.

This utility model relates to the field of panel light backplate technology, specifically a short-circuit resistant panel light backplate, comprising a panel light backplate body, a first cavity formed in the inner wall of the panel light backplate body, a first heat dissipation mesh fixedly installed inside the panel light backplate body, a second heat dissipation mesh fixedly installed inside the panel light backplate body, and a through hole separating the first and second heat dissipation meshes, all of which penetrate the left and right side walls of the panel light backplate body. Multiple mounting plates are fixedly installed on the inner wall of the panel light backplate body. In this utility model, the inner wall of the first insulating pad not only protects the surface of the wires, but also, through the polyurethane elastomer material, effectively isolates metal-to-electronic contact, prevents short circuits, ensures safe operation of the equipment, and, through its elastic properties, stably clamps the wires, improving the stability of the LED beads within the panel light backplate body.

This invention relates to a method for preparing and applying a flame-retardant polyurethane elastomer. The flame-retardant polyurethane elastomer incorporates a network structure, benzene rings, diphenyl phosphate, and silicon-oxygen bonds, increasing the degree of crosslinking and improving mechanical and self-extinguishing properties. Furthermore, the rigid triazine ring structural units effectively enhance the interactions between molecular chains, forming reinforced hard-segment microregions; while the flexible siloxane chains, with their low surface energy, promote microphase separation. This synergistic effect gives the flame-retardant polyurethane elastomer excellent overall performance. The chain extender contains abundant nitrogen and silicon dual flame-retardant elements, which can release non-flammable gases and form a dense silicate layer during combustion, endowing the material with good self-extinguishing ability. The flame-retardant polyurethane elastomer of this invention has excellent recyclability and self-extinguishing properties, can be applied in encapsulation materials, and is environmentally friendly.

The utility model relates to electric motor car technical field discloses a kind of electric motor car motor of middle placement, including protective shell, the inner bottom wall of protective shell is fixedly connected with backing plate, the utility model passes through polyurethane elastomer backing plate, absorbs the vibration energy generated when motor runs, play buffering effect, to reduce the amplitude of vibration transmission to external structure, effectively reduce the noise caused by vibration, simultaneously, sound insulation and noise reduction board of protective shell both sides, its internal fiber structure can produce multiple reflection and absorption to sound, further reduce noise propagation, the aperture of conical sound insulation hole on the surface of sound insulation and noise reduction board gradually decreases, so that sound is hindered and reflected by different aperture size when passing, effectively reduce the propagation intensity of sound, reach better sound insulation and noise reduction effect, significantly reduce the noise when electric motor car motor runs, avoid the adverse effects of traditional motor noise on riding comfort and surrounding living environment.

The application relates to the field of polyurethane elastomers, in particular to a preparation process of PET / COPET island-in-sea type fiber composite yarn, which comprises the following steps: (1) blending polyester resin chips with a modifier, melting and mixing, and recording as a PET melt; (2) melting alkali-soluble polyester resin chips (COPET), and recording as a COPET melt; (3) forming a composite melt by means of a melt pipeline through the PET melt and the COPET melt; (4) spinning the composite melt, and after cooling, oiling and winding, forming a fiber composite yarn precursor; (5) opening the fiber texture of the fiber composite yarn precursor, and performing water washing and drying treatment, so that PET / COPET island-in-sea type fiber composite yarn is obtained. The application designs an island-in-sea type fiber composite yarn, and compared with conventional PET / COPET fibers on the market, the fiber composite yarn has higher mechanical properties, higher elasticity and better acid and alkali resistance.

This invention discloses a protective helmet and its material-structure shape-form coordination design and manufacturing method. The method includes the following steps: Aramid III and high-molecular-weight polyethylene are composited into a rigid-flexible heterogeneous gradient composite fiber layer using a hot-pressing process, which serves as the outermost layer of the helmet body; a polyurethane elastomer material is manufactured into an energy-absorbing and shock-absorbing layer using an additive manufacturing process, which is then attached to the top inner side of the helmet body and placed as the middle layer; and a polyethylene polymer material is molded into a reinforcing patch layer using a high-temperature molding process, which is then attached to the key protection area on the top inner side of the middle layer and placed as the innermost layer. This invention effectively improves the protective performance and impact resistance of the helmet, reduces its weight, increases the flexibility and mobility of soldiers on the battlefield, and enhances their combat capabilities.

This utility model discloses a robotic arm gripper for an automated vacuum coating line, comprising a slide rail with two sliding blocks slidably mounted on it. The sliding blocks are driven by a cylinder. Each sliding block has a base, and gripper arms are mounted at both ends of the base. A pad, made of polyurethane elastomer, is mounted on the inner side of each gripper arm. In this utility model, the inner side of the pad that contacts the substrate is grooved, with a certain degree of redundancy, ensuring the substrate is fully contained within the groove when the gripper grasps it, while also preventing the substrate from detaching from the gripper. Since the contact between the pad and the substrate is mostly planar, friction is reduced. Furthermore, the polyurethane elastomer material of the pad generates fewer frictional particles when in contact with the metal substrate, thus reducing the occurrence of crystal defects.

This application relates to the field of floor construction technology, and discloses a prefabricated floor insulation and soundproofing system and construction method, including: an indoor floor structure, which serves as a foundation component for supporting and connecting other structures; a sound insulation and heat insulation layer laid on the indoor floor structure; and an elevated module disposed on the upper surface of the sound insulation and heat insulation layer. The elevated module contains multiple adjustable anchor components, the lower ends of which are supported on the upper surface of the indoor floor structure, thus creating an elevated space between the elevated module and the indoor floor structure. By injecting polyurethane, a continuous, cavity-free, and seamless sound insulation and heat insulation layer is formed. Combined with the adjustable anchor bolts, impact sound received by the indoor floor surface is transmitted to the prefabricated module. The impact sound is attenuated by the module and then transmitted to the polyurethane sound insulation and heat insulation layer and the polyurethane elastomer, thereby reducing mutual noise interference between floors.

This invention relates to a method for preparing a self-healing polyurethane flexible strain sensor. The self-healing polyurethane flexible strain sensor possesses self-healing capabilities because the polyurethane elastomer network contains a large number of polar groups and dynamic disulfide bonds, which can form strong hydrogen bonds with the polar groups on modified carbon nanotubes, creating a high-density hydrogen bond network. Simultaneously, the modified carbon nanotubes exhibit good compatibility with the polyurethane elastomer, and the itaconic acid and polylactic acid segments possess good biocompatibility. This results in a flexible strain sensor with wide strain detection capabilities and controllable degradation capabilities, and it can also be used to monitor human health and movement, demonstrating great potential in the fields of health monitoring and smart wearable devices.

The present application belongs to the technical field of polyurethane elastomer, and particularly relates to an antibacterial and waterproof polyurethane elastomer for post-fracture fixation as well as a preparation method and application thereof. The antibacterial and waterproof polyurethane elastomer is composed of component A and component B. The component A is hydrophobic modified polyether polyol, polysiloxane, antioxidant and catalyst. The component B is guanidine salt antibacterial agent modified isophorone diisocyanate and aliphatic or alicyclic diisocyanate. The polyurethane elastomer obtained after curing of the component A and the component B is free of precipitation of antibacterial agent, has good antibacterial effect, good waterproof effect, good aging resistance and good weather resistance. The preparation method is scientific and reasonable, the viscosity of the component A and the component B is small, and the method is easy to operate. In the production, there is no risk such as explosive polymerization.

This invention discloses a self-healing elastomer, belonging to the field of new materials technology. The invention utilizes a one-pot method to prepare the elastomer using hydroxyl-terminated prepolymers, isocyanates, chain extenders, metal ions, and crosslinking agents. The elastomer contains a rich multi-dynamic network of H bonds, metal coordination bonds, and disulfide bonds, resulting in a self-healing elastomer. This invention reduces the difficulty of preparation and improves the excellent properties of polyurethane elastomers, such as heat resistance and solvent resistance, through crosslinking. Simultaneously, it can achieve rapid self-healing at a low temperature of -10℃ and exhibits good mechanical properties.

The application provides a polyether type high solid content solvent-free water-based polyurethane emulsion, an elastomer and a preparation method thereof; the preparation raw material of the water-based polyurethane emulsion comprises the following components in the following weight parts: polyether polyol 90-360 parts by weight, alicyclic isocyanate 180-220 parts by weight, amine catalyst 1-5 parts by weight, hydrophilic chain extender 20-40 parts by weight, organic amine alkaline neutralizer 20-40 parts by weight, small molecular weight alcohol chain extender and / or large molecular weight alcohol chain extender 19-50 parts by weight, defoaming agent 1-5 parts by weight and deionized water 700 parts by weight. The application selects reaction raw materials with solvent functions, realizes solvent-free green synthesis, and significantly reduces the emission of organic volatile substances. The prepared water-based polyurethane emulsion has the characteristics of high solid content, and the prepared water-based polyurethane elastomer has excellent mechanical properties and hydrolysis resistance.

The application discloses a polyurethane elastomer for a wind power blade, characterized in that the polyurethane elastomer comprises an A component and a B component, and the mass ratio of the A component to the B component ranges from 5 to 25:1; wherein the A component comprises the following components in parts by weight: 70-100 parts of a hydroxyl dihydric alcohol, 1-20 parts of polysiloxane, 15-45 parts of diisocyanate, 0.01-0.5 parts of a catalyst and 1-10 parts of a silane coupling agent; wherein the B component comprises the following components in parts by weight: 5-20 parts of a small-molecule chain extender; the hydroxyl dihydric alcohol is one or more of polyether dihydric alcohol and polycarbonate dihydric alcohol, and the molecular weight of the hydroxyl dihydric alcohol is 650-3500 g / mol. The application further discloses a preparation method and application of the polyurethane elastomer. The protective film manufactured from the polyurethane elastomer can play a role in resisting sand and rain in a front edge structure of the wind power blade.

This invention provides a light-stable TPU composite material and its preparation method. The TPU composite material comprises the following components in parts by weight: 60-80 parts polyurethane elastomer, 1-10 parts ethylene-vinyl acetate copolymer, 3-10 parts composite light stabilizer, 1-5 parts compatibilizer, 0.5-2 parts antioxidant, 1-5 parts carbon black, and 0.5-2 parts lubricant. The TPU composite material obtained by this invention exhibits high tensile strength and elongation at break, demonstrating good mechanical properties that meet the tensile and bending requirements during cable laying. After hot air aging and accelerated UV aging, it retains a high elongation at break and exhibits a small color difference ΔE, indicating good resistance to thermo-oxidative aging, good light stability, and low color difference, meeting the requirements for use in complex outdoor environments.

This invention discloses an outdoor fabric with abrasion resistance and its manufacturing method, relating to the field of fabric technology. The fabric comprises a dense abrasion-resistant layer, a high-efficiency cushioning layer, and a flexible substrate layer, layered sequentially from the outside to the inside and bonded together using a dot matrix adhesive structure. The dense abrasion-resistant layer is made of modified ultra-high molecular weight polyethylene fiber, activated by plasma and grafted with a nano-alumina coating, blended with polytetrafluoroethylene fiber and woven in a varied twill weave. The high-efficiency cushioning layer is a polyurethane elastomer with a three-dimensional mesh structure. The flexible substrate layer is an elastic base fabric interwoven with high-strength nylon filaments and spandex-covered yarns. The dense abrasion-resistant layer significantly improves surface scratch resistance and abrasion resistance. The high-efficiency cushioning layer contains gradient-distributed protective microcapsules, providing dual protection of energy absorption and localized reinforcement upon impact. The flexible substrate layer provides high-elasticity basic support, ensuring the fabric's overall flexibility and close fit.

This utility model discloses a high and low temperature resistant and breakage-resistant cable, comprising a cable body, which includes a cable core and a sheath structure layer. The sheath structure layer is disposed outside the cable core and includes an outer sheath layer, a functional structure layer, a flame-retardant layer, an outer insulation layer, and an outer shielding layer. The functional structure layer consists of an outer layer, a middle layer, and an inner layer, arranged sequentially from the outside to the inside. The outer layer is a modified polyurethane elastomer, the middle layer is an aramid fiber braided reinforcement layer, and the inner layer is high-temperature resistant silicone rubber. This cable achieves high and low temperature resistance, increasing its practicality and solving the problem of cracking and breakage, mechanical protection failure, and unstable cable use under extreme temperature environments.