370 results about "Soft segment" patented technology

The invention provides a comb-shaped polymer binder, a pole piece and a battery, the comb-shaped polymer binder comprises an acrylate main chain, a flexible soft segment, a polar hard segment and a functional chain segment, the flexible soft segment, the polar hard segment and the functional chain segment are respectively grafted on the acrylate main chain, the flexible soft segment comprises an ether chain segment and / or an ester chain segment, the polar hard segment comprises a polar group and / or a first heteroaromatic ring group, and the functional chain segment comprises a functional group and a second heteroaromatic ring group. The functional chain segment comprises an aromatic ring group containing a pi-conjugated structure and / or a second heteroaromatic ring group containing a pi-conjugated structure. The comb-shaped binder adopts a structural design of'hard section anchoring + soft section buffering + functional side chain ', is helpful for enabling the binder to have high peel strength, stress buffering and electron conduction capabilities at the same time, is compatible with an existing wet coating-rolling process, is helpful for improving the peel strength and prolonging the cycle life of an electrode plate when being used for preparing the electrode plate, and is beneficial for improving the service life of the electrode plate. And the rate capability of the battery is improved.

The invention discloses a large-current-carrying-capacity flexible power cable, which belongs to the technical field of cable preparation, is used for solving the technical problem that the flame retardant property and the mechanical property of the power cable need to be further improved in the prior art, and specifically comprises a cable core, a wrapping layer, an insulating layer and a sheath layer which are sequentially arranged from inside to outside. The preparation method comprises the following steps: preparing alkoxy silane containing a benzocyclobutene group, preparing flame-retardant particles by using a sol-gel method, preparing modified polyurethane by using modified polysiloxane and 2, 5-furandimethanol as soft segments, naphthalene diisocyanate as a hard segment and trimethylolpropane as a chain extender, and preparing the flame-retardant flame-retardant polyurethane. The linear low-density polyethylene, the MAH-g-PE, the modified polyurethane, the flame-retardant particles and the auxiliary additive are melted and extruded outside the wire core to form the insulating layer, so that the power cable is obtained, the flame-retardant property of the power cable is effectively improved, and the mechanical property and the current-carrying stability of the power cable are also improved.

The invention discloses a solvent-free vanillin-hydroxyethyl acrylate double-system closed waterborne polyurethane emulsion adhesive as well as a preparation method and a use method thereof, and belongs to the field of waterborne polyurethane emulsion adhesives. The invention is mainly prepared from the following components in parts by weight: 40 to 50 parts of soft segment monomer, 50 to 60 parts of hard segment monomer, 20 to 40 parts of sealing agent, 0.02 to 0.15 part of catalyst, 0.4 to 0.6 part of emulsifier, 0.2 to 0.6 part of initiator, 4 to 12 parts of neutralizer, 5 to 15 parts of functional monomer and 340 to 360 parts of deionized water. According to the double-system closed waterborne polyurethane emulsion adhesive disclosed by the invention, rapid crosslinking curing of the adhesive can be realized through thermocuring, the highest hardness of an adhesive layer can reach about 26 MPa, the adhesive strength is high, and the mechanical property is relatively good.

The invention provides unsaturated waterborne polyurethane, a polyurethane composite material as well as a preparation method and application of the unsaturated waterborne polyurethane and the polyurethane composite material. According to the preparation method, isocyanate is introduced into a soft segment through a block process, an unsaturated chain extender is added, unsaturated double bonds are introduced, and waterborne polyurethane with excellent performance is prepared. Meanwhile, cellulose nanofibers are added into the unsaturated waterborne polyurethane, so that the interfacial compatibility and mechanical properties of the unsaturated waterborne polyurethane are improved. The unsaturated waterborne polyurethane provided by the invention has excellent film-forming property, stability and mechanical property.

The invention relates to the technical field of secondary batteries, and discloses a secondary battery, a negative active layer in a negative plate comprises a negative active material and a negative adhesive, the negative active material comprises a silicon-based material, the negative adhesive comprises a polymer, and the raw material of the polymer comprises a hard segment monomer and a soft segment monomer; the electrolyte comprises carbonic ester substances and lithium salt; on the basis of the total mass of the raw materials of the polymer, the mass content of the soft segment monomer is r%; on the basis of the total mass of the electrolyte, the mass content of the carbonic ester substance is t%; t / r is greater than or equal to 0.234 and less than or equal to 1.770. According to the secondary battery provided by the invention, the chemical structure of the adhesive is optimized and the composition of the electrolyte solution is adjusted, so that the excellent electrochemical performance of the battery is ensured, the swelling effect of the electrolyte on the adhesive is reduced, the cycle life of the battery is prolonged, and the safety of the battery is improved.

The invention discloses a preparation method of a long-acting antistatic polymer master batch for skin-core spinning polyester, and relates to the technical field of high polymer material preparation. The hard segment comprises the following components: 100 parts of aromatic polyester, the aromatic polyester is generated through a reaction of 100 parts of an aromatic monomer and 80-120 parts of aliphatic dihydric alcohol, the aromatic monomer is dimethyl terephthalate, and the aliphatic dihydric alcohol is 1, 4-butanediol. Through cooperation of the hard segment structure, the soft segment structure, the polyaniline, the protonic acid, the ionic liquid, the fluorine-containing polymer and the sulfonate, the problems that the antistatic performance of the polyester master batch depends on environment humidity, the subsequent process is easy to lose efficacy, and the compatibility with a polyester matrix is poor are solved; the master batch can maintain a stable antistatic effect in a low-temperature and low-humidity environment, the performance of the master batch is not attenuated after subsequent procedures such as elasticizing and printing and dyeing, meanwhile, short filaments and broken filaments are avoided in the spinning process, and the continuity of polyester fiber production and the quality of finished products are improved.

The invention provides a polyamide elastomer and a preparation method thereof. The method comprises the following steps: (1) under the action of a first catalyst, carrying out condensation polymerization on a poly-diol compound and a binary acid monomer in a solvent to obtain an end-capping reagent; (2) under the action of a second catalyst, an end-capping reagent and a comonomer are subjected to a contact reaction, and a polyamide block is obtained; and (3) in the presence of a stabilizer and under the action of a third catalyst, carrying out contact reaction on the soft segment and the polyamide block to obtain the polyamide elastomer, wherein the polydihydric alcohol compound is polyalkylene ether glycol with the number-average molecular weight of 150-2000, and the stoichiometric ratio of the polydihydric alcohol compound to the binary acid monomer is 1: (2.0-2.4); the comonomer is C4-C12 lactam and / or C4-C12 amino carboxylic acid; and the soft segment is a hydroxyl-terminated diol polymer. According to the invention, the performance loss of the hard-segment-dominated material is not caused on the basis of improving the soft-segment-dominated material mechanical property of the product, and the polyamide elastomer product with excellent comprehensive performance is obtained.

The invention belongs to the technical field of new energy materials, and particularly relates to a solid electrolyte material for a lithium battery and a preparation method thereof. The solid electrolyte material for the lithium battery is a polyurethane elastomer and consists of a polyether ion conduction soft segment and an isocyanate crosslinking hard segment, the soft segment is selected from polyether polyol and accounts for 66-90% of the total mass of the polyurethane elastomer; the hard segment is formed by reacting diisocyanate with a chain extender, and accounts for 10-34% of the total mass of the polyurethane elastomer; and the ether solvent is sealed in the soft segment phase by the polymer network. The polyurethane elastomer disclosed by the invention has high ionic conductivity, excellent mechanical property and good interface compatibility, and can be suitable for different types of lithium batteries, such as lithium ion batteries, lithium metal batteries, high-voltage lithium ion batteries and the like; and the preparation process is simple and suitable for large-scale industrial production.

The invention discloses a double dynamic bond self-repairing polyurethane elastomer as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The elastomer is prepared from the following raw materials in percentage by mass: 74 to 76 percent of polyether polyol, 15.5 to 18 percent of diisocyanate, 1.67 to 7 percent of dihydrazide compound and 2.1 to 6.7 percent of disulfide. The preparation method comprises the following steps: firstly, reacting polyether polyol with diisocyanate to obtain a prepolymer, then sequentially carrying out step-by-step chain extension reaction on the prepolymer, the bishydrazide compound and the disulfide compound, and finally, curing and forming. According to the invention, a synergistic structure of a hydrogen bond hard segment and a disulfide bond soft segment is constructed step by step, so that the material has high mechanical properties and efficient self-repairing capability. The elastomer is suitable for the fields of industrial pipeline sealing pieces, flexible packaging films, sports equipment accessories and the like, and solves the problem that the strength and repairing performance of an existing self-repairing polyurethane material are difficult to balance.

The invention relates to a copolyamide elastomer with a nitrogen-containing side group and a preparation method and application thereof, the copolyamide elastomer comprises a copolymer with a hard segment and a soft segment, and the soft segment is a polyether soft segment and / or a polyester soft segment; the hard segment comprises repetitive units as shown in a formula (1) and a formula (2), and a nitrogen-containing side group R3 is substituted or unsubstituted amino. The copolyamide elastomer disclosed by the invention is low in melting point and easy to form and process, has the characteristic of photoluminescence, can convert part of ultraviolet light into blue light, and has relatively high transmittance to visible light.

The invention discloses a preparation method of supramolecular aggregation-induced emission self-repairing waterborne polyurethane, which comprises the following steps of: polymerizing isocyanate serving as a hard segment and polytetramethylene glycol serving as a soft segment under the action of a catalyst to obtain a prepolymer, adding a molecular ligand into the prepolymer, and reacting to obtain the supramolecular aggregation-induced emission self-repairing waterborne polyurethane. And carrying out a stirring induced reaction to obtain the waterborne polyurethane with both luminescence property and self-repairing function. The preparation method is simple, the process is easy to control, the prepared waterborne polyurethane has excellent mechanical properties, the tensile strength reaches up to 72.6 MPa, and the elongation at break is 689.6%; under excitation of ultraviolet light of 260-400 nm, the material can emit blue fluorescence, and shows reversible optical response under external stimulation of acid, alkali and the like. In addition, after the material is repaired for 24 hours under the condition of 60 DEG C, the repair rate reaches 100%, and excellent self-repair capability is shown.

The invention discloses a transparent polyamide elastomer capable of realizing large deformation and a preparation method and application thereof, a hard segment of the polyamide elastomer contains an alicyclic or aromatic ring structure, and the polyamide elastomer has good transparency and mechanical properties. The hard segment is difficult to crystallize due to the steric hindrance effect of the cyclic monomer and is in an amorphous state at room temperature, the elastomer is endowed with excellent optical performance, the glass-transition temperature of the polyether or polyester soft segment is lower than the room temperature, and good flexibility and rebound resilience can be provided for the material. The polyamide elastomer is prepared through a melt polycondensation method, no extra water is added in the process, and the hydrolysis of the catalyst is inhibited to the maximum extent, so that the polymerization activity between a hard segment and soft segments with different molecular weights can be improved. The polyamide elastomer disclosed by the invention has the advantages of both transparent nylon and long-carbon-chain nylon elastomers, and has relatively high light transmittance (the light transmittance is 85-95%) and flexibility (the elongation at break is 900-2500%).

The application belongs to the field of paper-based materials, and provides a high-strength paper-based packaging material and a preparation method thereof. First, a water-based polyurethane with complete biodegradability and better strength modification effect is developed by using polyester polyol as a reaction soft segment and using completely degradable composite monomers (DMPA and BDO) as raw materials, and then the water-based polyurethane is compounded with dialdehyde starch-PVA to prepare a high-strength paper-based packaging material, which comprises: the base paper is loaded with at least one dialdehyde starch / PVA layer; the dialdehyde starch / PVA layer is loaded with at least one water-based polyurethane layer; and the raw material of the dialdehyde starch / PVA layer is composed of the following raw materials in parts by weight: dialdehyde starch 1-6 parts, PVA 1-3 parts. The application develops a coating layer with high strength, so as to perform surface modification on paper and give the paper sufficient mechanical properties to meet the demand of replacing plastic products.

The invention discloses a preparation method of a high-resilience foaming material, which comprises the following steps: S10, by taking modified thermoplastic polyurethane as a base material, carrying out permeation saturation on the base material by adopting supercritical fluid to obtain a saturated material; the soft segment of the base material is formed by copolymerizing polybutylene adipate and polycaprolactone, and the mass ratio of the polybutylene adipate to the polycaprolactone is (8: 1)-(9: 1); s20, the saturated material is subjected to injection molding to form a small blank; wherein during injection molding, the melt temperature ranges from 200 DEG C to 230 DEG C, the melt pressure ranges from 15 MPa to 25 MPa, and the mold temperature ranges from 20 DEG C to 40 DEG C; and S30, heating and foaming the small blank to obtain the high-resilience foaming material. Wherein the heating temperature of the foaming mold is that the upper mold is 185 DEG C + / -2 DEG C, the lower mold is 190 DEG C + / -2 DEG C, and the holding pressure is 7-9 MPa. The foaming material prepared by the preparation method has a rebound rate which is greater than 80%.

The invention relates to the technical field of polyurethane materials, in particular to a polyurethane elastic backing plate for a railway and a preparation method of the polyurethane elastic backing plate. The polyurethane elastic base plate provided by the invention is a low-compression permanent-deformation polyurethane elastic base plate for a railway, the raw materials and the preparation process of the polyurethane elastic base plate are specifically shown in the following description, and under the matching of the whole formula, the microphase separation degree of a hard section and a soft section in long-term service is effectively controlled; the polyurethane elastic backing plate not only has low compression set, but also has excellent tensile mechanical properties and static stiffness, lower-35 DEG C low-temperature static stiffness change rate, lower dynamic and static stiffness ratio and lower 30-day high-temperature aging static stiffness change rate.

The invention relates to a polyurethane-based composite solid polymer electrolyte film and a preparation method and application thereof, and belongs to the field of organic polymer solid electrolyte preparation. Polyethylene glycol-polypropylene glycol triblock copolymer and hydroxyl-terminated polybutadiene are used as soft segments, isophorone diisocyanate is used as a hard segment, and under the action of a catalyst, the polyurethane-based composite solid polymer electrolyte film is prepared. A chain extender containing disulfide bonds is utilized, and a polyurethane elastomer is prepared through gradual addition polymerization reaction; a polyurethane elastomer and a mixed solution of a lithium salt and a polyvinylidene fluoride-hexafluoropropylene copolymer are uniformly mixed, the polyurethane elastomer accounts for 10%-30% of the mass of the polyvinylidene fluoride-hexafluoropropylene copolymer, a precursor solution is obtained, the precursor solution is prepared into a film, and the polyurethane-based composite solid polymer electrolyte film is obtained. The polymer solid electrolyte membrane with excellent mechanical property and excellent lithium ion conductivity is constructed, and the development requirement of a high-performance lithium metal battery is met.

The invention relates to the technical field of high polymer materials, and discloses a furyl polyurethane adhesive and a synthesis method thereof, polymer polyol is used as a soft segment, isocyanate and two specific furyl chain extenders are used as hard segments, polymerization is performed through a one-step method, and the method has the advantages of simple process, short flow, mild reaction conditions and the like. Wherein a furan ring and an amide group of the two specific furyl chain extenders endow the material with rigidity and excellent bonding performance, and form a high-density hydrogen bond network with a hydrazide group, so that the mechanical strength, the toughness and the bonding performance of the material are remarkably improved. By regulating and controlling the proportion of the components, the rigidity and flexibility of the material can be effectively balanced, so that the polyurethane adhesive with excellent comprehensive performance is prepared. The furyl polyurethane adhesive prepared by the invention has relatively high adhesion strength and mechanical strength, and can be applied to the fields of buildings, automobile manufacturing, medical treatment, packaging, aerospace, electronics and the like.

The application belongs to the technical field of electrophoretic paint, and provides a polyurethane modified epoxy resin cathode electrophoretic paint and a preparation method thereof.The cathode electrophoretic paint comprises a cationic water-based resin emulsion, a blocked isocyanate crosslinking agent, a pigment paste, an additive and deionized water.The solid resin in the cationic water-based resin emulsion comprises polyurethane modified epoxy resin, the polyurethane modified epoxy resin comprises a bisphenol A type epoxy resin skeleton and polyurethane segments connected to the skeleton, the polyurethane segments contain tertiary amine groups introduced by N,N-dimethyl ethanolamine, and the tertiary amine groups are connected to the epoxy resin skeleton through urethane bonds formed by reaction of isocyanate groups with hydroxyl groups in the bisphenol A type epoxy resin skeleton.The application can reduce local enrichment of polyurethane soft segments and cationic hydrophilic groups in the deposited film, and reduce formation of low crosslinking density penetration channels in the cured paint film.

The invention provides a silicon-containing polyurethane material and a preparation method and application thereof.The silicon-containing polyurethane material comprises a hard segment and a soft segment, the hard segment is derived from reaction raw materials including diisocyanate and a chain extender, and the soft segment is derived from reaction raw materials including polysiloxane and macromolecular dihydric alcohol; in the process of preparing the silicon-containing polyurethane material by adopting the polysiloxane with the specific structure, rich fluorine atoms in the polysiloxane can be utilized to drive the polysiloxane to migrate to the surface of the material, so that a protective layer is formed on the surface of the material, and the biocompatibility and the biological stability of the material are enhanced. By adopting the mode, the silicon-containing polyurethane material with excellent biological stability, biocompatibility and mechanical property can be prepared on the premise of lower polysiloxane addition amount, and the problem that the biocompatibility and the mechanical property cannot be simultaneously considered when the polyurethane material is prepared by utilizing polysiloxane in the prior art is effectively solved.

A hot melt adhesive composition comprises a thermoplastic polyether ester block copolymer. The thermoplastic polyether ester block copolymer comprises 75 wt% to 85 wt% of polyester hard segments and 15 wt% to 25 wt% of polyether soft segments, the polyester hard segments are composed of aromatic polyester benzene ring functional groups reprocessed from recycled polyester products. The thermoplastic polyether ester block copolymer has a hardness of 35 shore D to 50 shore D and a melting point of 90 DEG C to 110 DEG C, and the proportion of regenerated PET is not less than 20 wt%. The present application also provides a hot melt adhesive film formed by the hot melt adhesive composition, and a shoe reinforcement comprising the hot melt adhesive film. The shoe reinforcement has an elastic loss rate of 25% or less. By using the hot melt adhesive composition, the shoe reinforcement can be obtained by heat setting treatment below 90 DEG C and has good resilience. In addition, using the hot melt adhesive composition to make the shoe reinforcement also helps the recycling of the whole shoe.

The present invention relates to a water-based polyurethane adhesive composition comprising: (a) a polyurethane polymer comprising a soft segment derived from a polyester polyol and a hard segment derived from a polyisocyanate; wherein the weight ratio between the soft segment and the hard segment is greater than 5.6, and the weight average molecular weight of the polyurethane polymer does not exceed 20000 g / mol; (b) water; (c) optionally a thickener; (d) optionally, a defoaming agent; and (e) optionally a matting agent. The invention also relates to an activation product obtained from the composition, and an article comprising the activation product or assembled using the composition.

This invention provides a phosphorus-containing flame retardant, its preparation method and application, and a resin composition and its application, specifically relating to the field of polymer materials technology. The phosphorus-containing flame retardant provided by this invention achieves an integrated design of the flame-retardant unit and the elastic matrix at the molecular scale by directionally and controllably grafting phosphorus-containing groups M onto the active sites of the polybutadiene soft segments in a styrene-butadiene-styrene block copolymer via covalent bonds. This structure retains the inherent high flexibility, impact resistance, and processing rheological properties of the styrene-butadiene-styrene block copolymer while imparting intrinsic, durable, and uniformly distributed flame-retardant capabilities to the material. Simultaneously, because the phosphorus element is anchored to the polymer backbone / side chain, no small molecule polar impurities are introduced, significantly suppressing dielectric polarization loss and hygroscopicity increases. This provides a structural basis and performance guarantee for the subsequent construction of a high-end thermosetting resin system for copper-clad laminates with low Dk / Df, high Tg, and low CTE.

The invention discloses low-temperature cutinase CtCut derived from marine fungi and capable of efficiently degrading PU and PET plastics and application of the low-temperature cutinase CtCut. The amino acid sequence of the low-temperature cutinase CtCut is shown as SEQ ID NO. 2, and the nucleotide sequence of the low-temperature cutinase CtCut is shown as SEQ ID NO. 1. The CtCut can degrade various polyurethanes (PU) such as polyester type PU ImpranilTMDLN, polyether type PU foam and PBA-PU at the temperature of 35 DEG C, and also has a degradation effect on polyethylene glycol terephthalate (PET). The CtCut can efficiently break ester bonds in PET, ester bonds in a PU soft segment and carbamate bonds in a PU hard segment. The cutinase CtCut has substrate heterogeneity, can efficiently degrade PET (Polyethylene Terephthalate) and PU (Polyurethane) plastics, and can provide theoretical guidance and technical support for recycling various types of PU and mixed plastics in the future.

The invention discloses a polyurethane emulsion and a secondary battery. The polyurethane emulsion comprises water and a polymer dispersed in the water; the polymer comprises a core and a shell, the core is coated with the shell, the core comprises water, the shell comprises polyurethane, and the raw materials of the polyurethane comprise a hard segment monomer, a soft segment monomer, a cross-linking agent, a hydrophilic chain extender and a neutralizer; the hard-segment monomer comprises polyisocyanate containing at least one aliphatic ring, and the polyisocyanate does not contain other unsaturated groups except for isocyanate groups; the soft segment monomer comprises chain aliphatic polyol, the number of carbon atoms of a main chain of the chain aliphatic polyol is not less than 3, and the main chain does not contain heteroatoms and unsaturated groups; the cross-linking agent comprises at least three hydroxyl groups, and the mass of the cross-linking agent accounts for 0.1%-5% of the total mass of the polyurethane raw materials; the hydrophilic chain extender comprises carboxyl and at least two hydroxyls, and the mass ratio of the neutralizer to the hydrophilic chain extender is (0.25: 1)-(0.85: 1). The polyurethane emulsion can be applied to negative electrode bonding of a high-silicon battery system.

The application discloses a kind of high toughness ultra-low VOC water-based epoxy emulsion, comprising: epoxy resin: 40-60 parts;SBS: 5-10 parts;Styrene: 2-5 parts;Acrylate monomer: 2-5 parts;Initiator: 1.5-3 parts;Polymerization inhibitor: 0.01-0.1 parts;Emulsifier: 3-5 parts;Water: 40-60 parts.It is modified by SBS with hard segment and soft segment in molecular chain to epoxy resin, on the basis of improving toughness, ensure the mechanical strength and heat aging resistance of modified epoxy.The application also discloses its preparation method, and the styrene and acrylate monomer used as copolymer bridging agent, also as the solvent of SBS and epoxy resin under the protection of polymerization inhibitor in the dissolution stage, so that the temperature does not need to be too high when dissolving, melting, the viscosity is moderate when dispersing and emulsifying, monomer copolymerization into polymer after emulsification, so that VOC can be reduced to almost zero.

The invention discloses a polyurethane filling adhesive as well as a preparation method and application thereof, and relates to the field of cable materials. The polyurethane filling adhesive comprises hydrophobic polyurethane, an anti-hydrolysis agent, a heat conducting agent and a flame retardant; the hydrophobic polyurethane is formed by polymerizing a soft segment, a hard segment and an amine chain extender, and the soft segment comprises at least one of polytetrahydrofuran ether, dihydroxybutyl-terminated polydimethylsiloxane and aminopropyl terminated polydimethylsiloxane; the anti-hydrolysis agent comprises triisopropanolamine, a carbodiimide anti-hydrolysis agent and an epoxy silane anti-hydrolysis agent. Hydrophobic polyurethane adopts a soft segment containing hydrophobic groups, hydrolysis is inhibited from the source, meanwhile, the hydrolysis resistance is improved in cooperation with the ternary compound hydrolysis-resistant agent, a compact highly-physical cross-linked network is constructed, hydrolysis is inhibited from a chemical structure and a physical barrier community through cooperation of the three components, and long-acting hydrolysis-resistant protection is achieved; and the stability of heat-conducting property and flame-retardant property of the material is maintained in a severe environment in which a high-voltage cable is used.

The invention provides yellow glue resistant to corrosion of a plasticizer and a preparation method of the yellow glue. The yellow glue is prepared from a polyurethane prepolymer, a chloroprene rubber sheet, methyl methacrylate, benzoyl peroxide, an anti-aging agent, butanone, cyclohexane, dimethyl carbonate and tackifying resin. The polyurethane prepolymer is prepared from the following components in parts by weight: 10 to 14 parts of 1, 4-butanediol adipic acid polyester polyol, 4 to 8 parts of polycaprolactone polyol, 1 to 3 parts of diphenylmethane diisocyanate, 0.05 to 0.15 part of 1, 6-hexanediol, 1 to 2 parts of hydroxyethyl methacrylate, 0.01 to 0.03 part of organic bismuth catalyst and 75 to 80 parts of butanone. The polyurethane prepolymer with specific crystallization performance is synthesized through cooperation of polycaprolactone polyol and polyester polyol, and the yellow glue is endowed with excellent plasticizer corrosion resistance and low-temperature activation capacity. Active groups in the polyurethane prepolymer are subjected to graft copolymerization with the chloroprene rubber adhesive and MMA, and a plasticizer-resistant polyurethane chain segment is introduced into a molecular chain of the chloroprene rubber adhesive, so that a hard segment-soft segment alternating block structure is formed, and corrosion resistance and viscoelasticity are both considered.

A composition comprising a first composition, and wherein the first composition comprises the following components a and b: a) at least one ethylene / alpha-olefin multi-block interpolymer that comprises a density≤0.880 g / cc and a soft segment melting temperature (SS-Tm)≤2.0° C.; b) at least one propylene-based polymer; and wherein component a is present in an amount ≥88 wt %, a based on the sum weight of components a and b.

The invention discloses a self-repairing anti-twisting shielding composite cable, and relates to the technical field of cables, the self-repairing anti-twisting shielding composite cable comprises a conductor, an insulating layer, a shielding layer and an outer sheath which are sequentially sleeved from inside to outside, and the insulating layer and / or the outer sheath are / is obtained by extruding a self-repairing polyurethane elastomer; the self-repairing polyurethane elastomer is prepared from the following components in parts by weight: 100 parts of soft-segment polyol, 40 to 80 parts of isophorone diisocyanate, 12 to 20 parts of a chain extender containing disulfide bonds and 5 to 12 parts of a chain extender containing ureido, and the soft-segment polyol is selected from at least one of polytetrahydrofuran ether glycol and amino-terminated polydimethylsiloxane. The self-repairing anti-twisting shielding composite cable is high in self-repairing capacity, excellent in anti-twisting performance and stable in shielding performance.

The invention relates to the technical field of high polymer material synthesis, in particular to a carbon dioxide-based polycarbonate type polyurethane polyurea material as well as a preparation method and application thereof. In the carbon dioxide-based polycarbonate type polyurethane polyurea material, carbon dioxide-based polycarbonate diol is used as a soft segment, a chain segment formed by reaction of diisocyanate, diamino disulphide and a micromolecular diol chain extender is used as a hard segment, and a melting method is adopted for polymerization in the preparation process. The polyurethane-polyurea material prepared by the invention has self-repairing capability when being damaged or scratched, can be pressed into a film or a coating to be used in the field of flexible electronic devices or automobile protective films, can ensure the durability of equipment, prolong the service life, reduce the maintenance cost, prolong the life cycle of a high polymer material, reduce pollution, and is suitable for industrial production. Meanwhile, the material takes carbon dioxide-based polycarbonate diol as one of main raw materials, and belongs to one of technologies for recycling carbon dioxide in carbon neutralization.