78 results about "Soft segment" patented technology

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.

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 application provides an adhesive and a preparation method and application thereof, and comprises the following raw materials in parts by weight: the adhesive comprises AB components; the A component: polyether polyol 20-30 parts, polyether amine 25-30 parts, calcium carbonate 10-20 parts, talcum powder 10-20 parts, catalyst 0.4-0.6 parts, solvent 10-15 parts; the B component: polyisocyanate 10-30 parts, polar plasticizer 2-8 parts, white water preventing agent 0.2-0.5 parts, antioxidant 0.2-0.5 parts. In the application, the polyether polyol and the polyether amine of the A component are soft segments, which can make the adhesive more flexible and elastic; the polyisocyanate of the B component is a hard segment, which can enhance the strength and heat resistance of the adhesive. The application mixes the A component and the B component according to the mass ratio, so that the mixing ratio of the soft segment and the hard segment is appropriate, and the adhesive performance of the adhesive is optimal; the polar plasticizer can reduce the viscosity of the adhesive, has a good promoting effect on micro-phase separation, and increases the surface polarity of the base material.

The invention relates to the field of macromolecules, in particular to a polyamide elastomer raw material composition and application thereof, polyamide elastomer and a preparation method thereof. The raw material composition contains polyamide and polyether, wherein at least one end-capping group in the polyamide is an amino-terminated group; at least one end-capping group in the polyether is an ester group. When the raw material composition is used for preparing the polyamide elastomer, the advantages of high reaction speed, high production efficiency and the like are achieved, the reaction controllability is high, the molecular weight of the product is large, and the type, molecular weight and structure of the soft segment can be adjusted according to application requirements, so that the performance of the elastomer is effectively regulated and controlled.

The application relates to a polypropylene mute pipe material and belongs to the technical field of pipe materials. In order to solve the problem of poor mute performance of the existing mute pipe material, the polypropylene mute pipe material comprises an inner layer, a middle layer and an outer layer, the middle layer comprises the following components in parts by weight: block copolymerized PPB resin: 38-45; pre-activated inorganic filler: 50-54; hydroxyl-terminated aliphatic hyperbranched polyester: 0.2-1.0; maleic anhydride grafted SEBS elastomer: 2-6; processing aid: 0.8-1.2; the maleic anhydride grafting rate of the maleic anhydride grafted SEBS elastomer is 1.0%-3.0%, the styrene content is 25%-35%, and the double-block content is 1.0-5.0%. Through the content control of the hard segment and the soft segment, vibration energy can be obviously dissipated, and the noise influence caused by vibration is reduced.

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 a polyurethane resin, polyurethane synthetic leather, its preparation method, and its applications. The polyurethane resin is prepared by reacting a hard segment component and a soft segment component. The raw materials for the hard segment component include diisocyanate and a small molecule chain extender, while the raw material for the soft segment component is an organosilicon diol. The polyurethane resin of this invention can solve the color development problem of synthetic leather, resulting in good overall color uniformity and excellent mechanical properties, and can be widely used in clothing and bags, etc.

This application relates to a high thermal conductivity, low stress acrylic chip mounting adhesive, belonging to the field of semiconductor chip mounting adhesive technology. The high thermal conductivity, low stress acrylic chip mounting adhesive of this application comprises: an acrylic copolymer matrix modified with polyether segments, containing alkenyl imidazole ionic liquid copolymer units; a composite thermally conductive filler surface-grafted with acryloyloxysilane, constructing a three-level hierarchical thermally conductive topology of island-bridge-network through a coupling agent; an intrinsically flame-retardant polymer, whose flame-retardant functional units are covalently integrated into the acrylic block copolymer, forming a ternary soft-segment-rigid structure system with the polyether segments and ionic liquid; and hyperbranched crosslinking monomers and star-shaped polymer functional additives; the chip mounting adhesive employs a UV-thermal dual-gradient curing system. This application exhibits excellent effects such as high thermal conductivity, low elastic modulus, UL94V-0 intrinsic flame retardancy, and antistatic properties.

This application relates to the field of electrochromic materials technology, and discloses a polymeric electrochromic material and its application in anti-glare rearview mirrors. The polymeric electrochromic material is formed by in-situ polymerization and curing under ultraviolet light of a solvent, a polyurethane prepolymer with terminal double bonds, a violet derivative containing double bonds, a complementary electrochromic material, and a photoinitiator. The violet derivative containing double bonds is covalently anchored to the three-dimensional polymeric gel network framework formed by the crosslinking of the polyurethane prepolymer with terminal double bonds. This invention restricts the directional migration of the chromogenic groups through chemical bonding, effectively solving the problems of easy leakage and delamination during long-term operation of traditional devices. Simultaneously, the use of polyether soft segments to construct ion channels ensures that the device has a second-level response speed and high optical contrast. The material has a simple preparation process, good weather resistance, and is particularly suitable for automotive anti-glare rearview mirrors.

The application discloses a car paint protective film with scratch self-repairing function and a preparation method thereof, and belongs to the technical field of car paint protective films. Firstly, nano cerium dioxide is modified by epoxy silane and grafted with polyethylene imine to obtain polyethylene imine grafted nano cerium dioxide, and amino-containing hyperbranched polysiloxane is prepared by taking 1,6-hexanediol and gamma-aminopropyl triethoxysilane as raw materials; then, epoxy-terminated self-repairing polyurethane is obtained by taking polycarbonate diol as a soft segment, isophorone diisocyanate as a hard segment, adding bis(4-hydroxyphenyl) disulfide for chain extension and then performing epoxy propanol end-capping treatment; finally, the polyethylene imine grafted nano cerium dioxide, the amino-containing hyperbranched polysiloxane and the epoxy-terminated self-repairing polyurethane are compounded and cured to construct a synergistic system of ultraviolet blocking, dynamic self-repairing and interface enhancement, so that the material has good self-repairing ability and ultraviolet resistance, and meets the use requirement of long-acting protection of a car paint surface.

This invention relates to an intrinsically fluorescent polyester elastomer and its preparation method. The elastomer is copolymerized from vanillin-based aldehyde monomers with small-molecule cyano monomers and cyano-terminated polyethers or polyester diols via a Knoevenagel polycondensation reaction. By adjusting the molar fraction of the soft segment, a continuous transition from rigid fluorescent plastics to highly elastic fluorescent polyester elastomers can be achieved. The resulting material exhibits both high fluorescence quantum yield and high elongation at break, and can be applied in fields such as melt spinning, fluorescent anti-counterfeiting, and flexible optoelectronic devices.

This invention belongs to the field of marine coating technology, specifically relating to a special composite antifouling marine coating and its preparation method. It uses modified polyurethane as the film-forming matrix, and utilizes polytetrahydrofuran ether soft segments and IPDI hard segments to impart seawater resistance and high toughness to the coating. Imidazole groups can recognize acidic microdomains formed by microbial metabolism, allowing the coating to maintain a low surface energy state in seawater to block initial biological adhesion. Under acidic conditions, charge reversal and hydrophilic switching are achieved through hydrogen bonding, disintegrating the biofilm and forming a physical anti-adhesion barrier. By constructing pH-responsive microcapsules, IPDI is cross-linked with amine monomers to form an anti-swelling wall material. Acidic sensitizing units are grafted onto the surface double bonds, and the interior is encapsulated with a core material composed of modified dehydroabscisic acid and matrine. Under acidic conditions, the sensitizing units protonate, triggering the release of the core material, inhibiting primary microorganisms and large attached organisms. In the weakly alkaline environment of seawater, it can automatically seal pores and stop release, achieving long-lasting antifouling and environmentally friendly performance, suitable for marine protection applications.

This invention discloses a chlorinated polycarbonate-based polyurethane for lithium-ion battery binders and its preparation method. The polyurethane is prepared from carbon dioxide-based polycarbonate diols with chlorine-containing side groups through chain extension with diisocyanate and small-molecule diols. This polyurethane possesses excellent mechanical properties, outstanding heat resistance, and low-temperature flexibility. As a binder for lithium-ion batteries, it contains numerous polar carbonate groups and chlorine groups, facilitating lithium-ion migration and exhibiting high ionic conductivity. The chlorine atoms in the side groups also impart good flame retardancy to the binder, enhancing battery safety. Because the soft segments are carbon dioxide-based copolymers, compared to commonly used PVDF binders, this polyurethane binder also offers advantages such as biodegradability, low cost, and easier recycling of electrode materials.

The application provides a human body temperature sensor based on PU-PEG phase change behavior and a preparation method thereof. The method comprises the following steps: reacting polyethylene glycol with different molecular weights with diisocyanate to generate a prepolymer, carrying out chain extension to obtain a PU-PEG phase change material, and then electrospinning to form a nanofiber membrane, and then attaching flexible electrodes to both sides of the membrane to obtain the sensor. The application uses the triple synergy of mixed soft segments, alicyclic or aliphatic diisocyanate and electrospinning to increase the lower limit of the crystallization temperature of the phase change material from 30-31 DEG C to above 35 DEG C, so that the melting and crystallization windows are simultaneously accurately matched with the human body temperature interval of 35-42 DEG C. The sensor uses the ion conductivity mutation caused by PEG phase change to perceive temperature, the sensitivity reaches 8.8±0.77 % / DEG C, the response time is less than 5 seconds, the temperature measurement range is 35-45 DEG C, the resolution is 0.05 DEG C, and the sensor has excellent flexibility, cycle stability and biocompatibility, and can be used for wearable real-time monitoring of human body temperature.

The application provides a packaging adhesive film and a preparation method and application thereof, and relates to the technical field of photovoltaic devices. The packaging adhesive film comprises the following raw materials: 60-90% of a base resin, 5-20% of a dynamic crosslinking agent, 0.5-10% of nano-enhanced fillers, 0.5-5% of weather-resistant functional additives, 0.5-3% of a composite initiator and 0.1-3% of a silane coupling agent. The base resin contains soft segment chains in the main chain, and side groups or end groups contain first reactive functional groups. The dynamic crosslinking agent is a monomer and contains second reactive functional groups. The first reactive functional groups and the second reactive functional groups can react with each other, so that the base resin and the dynamic crosslinking agent react to form a dynamic covalent crosslinking network. The soft segment chains are polyether type soft segment chains, polycarbonate type soft segment chains or polyester type soft segment chains. The prepared packaging adhesive film has the characteristics of curl resistance, high interface stability and stable material modulus, and is suitable for preparing various photovoltaic modules.

The invention discloses a bio-based heat-resistant high-elasticity nylon elastomer and a preparation method thereof, and relates to the technical field of high polymer materials. The preparation method comprises the following steps: (1) adding bio-based dibasic acid, bio-based diamine, trimesic acid, a polyether soft segment, a reaction auxiliary agent and deionized water into a reaction container; (2) in a nitrogen atmosphere, heating and pressurizing to carry out a first reaction; (3) after the first reaction is completed, heating and pressurizing for second reaction; and (4) after the second reaction is completed, releasing the pressure, vacuumizing, and heating to carry out a third reaction. According to the preparation method, the polymerization reaction degree of the raw materials is higher, and the performance of the obtained product is better; the reaction is more thorough, and the utilization rate of each raw material and the yield of the product are obviously improved; meanwhile, the reaction efficiency can be improved, the production period is remarkably shortened, the energy consumption and the production cost are reduced, and the method is suitable for large-scale industrial production of the bio-based heat-resistant high-elasticity nylon elastomer.

This invention discloses a binder, its preparation method, and its application. The binder comprises the following raw materials: a compound containing soft segments, a compound containing hard segments, and a chain extender. The compound containing soft segments includes polyether polyols and polyester polyols, wherein the polyether polyols are end-capped with amino or hydroxyl groups, and the polyester polyols are end-capped with amino or hydroxyl groups. The compound containing hard segments is a diisocyanate, and the chain extender is a chain extender containing phenolic groups. This binder helps solve the interface problem of the positive electrode during battery operation and is expected to improve the cycle life and stability of the battery.

The application discloses a thermoplastic polyurethane elastomer with high damping and a pendant chain, and is obtained by mixing raw materials including one or more polyester diols or polyether diols, diisocyanate compounds, small-molecule chain extenders, a pendant-chain-containing diol chain extender and a catalyst, and then performing a curing reaction; the pendant-chain-containing diol chain extender is synthesized by reacting raw materials including polyethylene glycol monomethyl ether, 2-amino-1,3-propanediol and isophorone diisocyanate. In the application, the soft segment structure is composed of polyester diols or polyether diols and the pendant-chain-containing diol chain extender, and the hard segment structure is composed of diisocyanate compounds and small-molecule chain extenders; different performance requirements can be achieved by adjusting the chain segment structure; the prepared elastomer has very superior damping performance; meanwhile, the preparation process is simple and easy to operate, and the application field of the damping polyurethane material can be widened.

The present application relates to the technical field of coating, and particularly discloses a weather-resistant and wear-resistant organic silicon polyurethane coating as well as a preparation method and application thereof.The present application provides a weather-resistant and wear-resistant organic silicon polyurethane coating, which is constructed by an organic silicon soft segment to form a flexible skeleton, a bonding type weather-resistant system to fix an ultraviolet-resistant and light-stable unit, and a fluorine-containing curing agent to form a surface wear-resistant protective layer, so that the weather resistance, wear resistance and flexibility are simultaneously improved.Meanwhile, the weather-resistant and wear-resistant organic silicon polyurethane coating has good adhesion and a long protection period, and can meet the protection requirements under complex working conditions.The present application provides a preparation method of the weather-resistant and wear-resistant organic silicon polyurethane coating, which has mild reaction conditions, controllable operation and good repeatability, does not need special equipment, and is suitable for large-scale production.

This invention provides a polyfluorosiloxane alkyl polyurethane, its preparation method and application, and marine protective coatings, relating to the field of marine engineering protection technology. The polyfluorosiloxane alkyl polyurethane provided by this invention has a molecular chain comprising a soft segment component and a hard segment component. The soft segment component is a polylactic acid-polycarbonate copolymer with dihydroxyl-terminated ends; the hard segment component has polyfluorosiloxane side chains. Using the polyfluorosiloxane alkyl polyurethane provided by this invention, a biomimetic super-lubricating surface marine engineering protective coating with self-healing function and highly stable surface lubricant can be prepared. The chemically bonded polyfluorosiloxane side chain structure endows the coating with longer-lasting corrosion protection performance; the addition of mercapto-modified nano-silica further enhances the mechanical properties and UV aging resistance of the coating; simultaneously, the preparation method of this polyurethane is simple, and the reaction conditions are mild and efficient.

This invention discloses an aliphatic TPU base film with high resistance to humid heat aging for invisible car wraps and its preparation method, belonging to the field of polymer functional film technology. The base film of this invention is synthesized from aliphatic diisocyanate and a compound polyol via a multi-stage prepolymerization method, wherein the compound polyol is composed of aliphatic polycarbonate diol and polytetrahydrofuran ether diol. The raw materials also contain a triple compound stabilizer system consisting of a carbodiimide anti-hydrolysis agent, a hindered phenolic antioxidant, and a benzotriazole UV absorber. The preparation process includes multi-stage feeding, precision filtration, and biaxial stretching heat setting. Through soft segment molecular structure design, synergistic protection of compound stabilizers, and precise process control, this invention enables the base film to maintain an elongation at break ≥85%, a tensile strength retention ≥80%, and a yellowing index ΔYI ≤1.03 after aging at 85℃ / 85%RH for 2000h, exhibiting both high resistance to humid heat aging and excellent optical and mechanical properties.

The present invention provides an easily dyeable spandex and its preparation method. During the spandex preparation process, a polyether ester polyol with a specific structure is added to a glycol-based raw material, resulting in spandex fibers with a specific aromatic group-polyether block structure in their molecular soft segments. Compared to conventional spandex, the easily dyeable spandex of the present invention increases the dyeing rate and fixation ability of spandex for disperse and acid dyes without compromising its mechanical properties. By adjusting the mass ratio of the aforementioned aromatic group-polyether block structure in the spandex molecular soft segments, the spandex achieves sufficient dyeing rate and fixation while exhibiting superior alkali resistance.

The invention discloses a bacteriostatic damp-proof aluminum foil composite film for packaging and a preparation method thereof, and belongs to the technical field of packaging materials. And connecting the outer layer with one side of the aluminum foil through an adhesive, connecting the other side of the aluminum foil with the heat sealing layer through an adhesive, and curing to obtain the antibacterial and damp-proof aluminum foil composite film for packaging. The preparation method of the adhesive comprises the following steps: taking a soft-segment main body, a hard-segment main body, a hydrophilic chain extender and a soft-segment modifier for prepolymerization, adding a short-chain chain extender and a long-chain chain extender, continuously stirring, adding a cross-linking agent, continuously stirring, cooling, adding a neutralizer, stirring, adding deionized water, and uniformly stirring and dispersing at a high speed to obtain a modified polyurethane emulsion; and uniformly mixing and dispersing the modified polyurethane emulsion, antibacterial particles, a wetting agent, a defoaming agent and an antioxidant to obtain the adhesive. The antibacterial particle is a coating particle which takes polyvinyl imidazole modified nano zinc oxide as a core and chitosan as a shell; the antibacterial and moisture-proof performance of the aluminum foil packaging film is improved.

The application belongs to the technical field of polymer film materials, and particularly relates to a bipolar polyether modified polyamide elastomer as well as a preparation method and application thereof. The bipolar polyether modified polyamide elastomer provided by the application comprises alternatingly arranged aliphatic polyamide hard segments and bipolar polyether soft segments, the aliphatic polyamide hard segments and the bipolar polyether soft segments are connected through ester bonds, and the mass fraction of the aliphatic polyamide hard segments in the bipolar polyether modified polyamide elastomer is 30-70%. The bipolar polyether modified polyamide elastomer provided by the application realizes segment polarity difference regulation, micro-phase domain controllable construction and soft / hard segment synergistic effect on a molecular scale by constructing a block structure composed of aliphatic polyamide hard segments and bipolar polyether soft segments, so that a polyamide elastomer film material with high selectivity, high permeability and high stability is obtained, and efficient gas separation and selectivity in CO2 / CH4, CO2 / N2 and other systems can be effectively realized.

The application discloses a kind of high-strength high-elasticity bio-based polyamide elastomer, preparation method and elastic fiber, and bio-based polyamide is hard segment for bio-based polyamide elastomer, polyether or polyhydric alcohol is soft segment;The weight average molecular weight ratio of the hard segment and soft segment is 1-9;Subsequently, elastic fiber is prepared by melt spinning.The application controls the ratio of the weight average molecular weight of soft segment and hard segment, so that the elastomer has good fiber-forming property, strength and elasticity, and realizes the flexible control of the strength and elastic recovery rate of the elastomer, finally obtains polyamide elastomer with different strength and elastic recovery rate, can meet the needs of different fields, realizes the multifunctional application of polyamide elastomer.

This invention belongs to the field of polymer materials, specifically relating to a comb-shaped biodegradable thermoplastic elastomer and its preparation method. The soft segment of this biodegradable linear comb-shaped thermoplastic elastomer is obtained by quaternary copolymerization of epoxy alkane, allyl epoxycyclohexane, aliphatic acid anhydride, and CO2. It combines the excellent barrier properties of polycarbonate, the good toughness of polyether, and the good hardness, biocompatibility, and biodegradability of polyester. The content of polycarbonate, polyester, and polyether in the copolymer is adjustable. By adjusting the raw materials of the soft segment and the mass ratio of the main chain and branches, copolymers with superior performance and diverse structures can be prepared. The number-average molecular weight of the copolymer is 250.0~400.0 kg / mol, and the molecular weight distribution is 1.9~2.4. Furthermore, this polymer is biodegradable, and the released small molecule compounds can be reused, causing no environmental pollution.