381 results about "Extender" patented technology

The invention provides an antifouling self-cleaning fluorocarbon finish paint as well as a preparation method and application thereof, and particularly relates to the technical field of special coatings. The antifouling self-cleaning fluorocarbon finish paint is composed of a component A and a component B in a ratio of (80-87): 16, the component A is prepared from the following components in parts by weight: 560 to 580 parts of fluorocarbon resin, 30 to 35 parts of a first solvent, 20 to 40 parts of a second solvent, 180 to 220 parts of titanium dioxide, 90 to 110 parts of filler, 11 to 20 parts of a light stabilizer, 3 to 5 parts of a thickening agent and 13 to 28 parts of an auxiliary agent; the component B comprises the following components in parts by weight: 20-22 parts of fluorocarbon resin, 4-5 parts of a chain extender, 15-20 parts of a diamine curing agent, 15-20 parts of a polyamine curing agent and 25-35 parts of a second solvent. According to the finishing paint, on the basis of enhancing the self-cleaning capability, the weather resistance of a coating is improved, and the aging and damage of the coating are delayed, so that the service life of the coating is prolonged.

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 discloses a wear-resistant coating and application thereof on a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functionalized polyurethane-acrylate composite emulsion, a photoinitiator, an auxiliary agent and deionized water. Wherein the composite emulsion is prepared from hyperbranched polyester polyol, a dynamic bond chain extender and the like through prepolymerization, fluorine-containing grafting and in-situ sol-gel reaction, a hyperbranched skeleton provides mechanical support, double dynamic bonds endow a self-repairing function, in-situ nano-compounding enhances wear resistance, a diurea hydrogen bond enhances binding force, and a fluorine-containing side chain endows a coating with hydrophobic and stain-resistant performance; and preparing the coating by matching with a gradient curing process. The coating prepared by the invention has high wear resistance, efficient self-repairing property, firm adhesive force, excellent stain resistance and leather adaptation flexibility, and meets the actual requirements of middle and high-end leather finishing.

The invention discloses a waterproof bag film material and a preparation method thereof, relates to the technical field of polybutylene terephthalate polymer materials, and belongs to the patent classification number C08L67 / 02. The method comprises the following steps: sequentially carrying out silane coupling agent modification and solid-phase free radical polymerization on activated gas-phase nano silicon dioxide to construct a core-shell structure nano reinforced filler with rich epoxy groups on the surface; carrying out melt blending extrusion on the mixture, PBT (Polybutylene Terephthalate) resin, a chain extender, an end-capping reagent and the like to obtain hydrolysis-resistant modified granules; a PBT base film is prepared through casting, two-way stretching and heat setting; the preparation method comprises the following steps: performing ultraviolet ozone activation on a base film, coating a super-hydrophobic coating solution prepared from aminated nano silicon dioxide, epoxy-terminated polydimethylsiloxane, a cross-linking agent and an accelerant, and heating and curing to finally obtain the high-strength high-waterproof PBT waterproof bag film. The prepared film has excellent mechanical strength, body hydrolysis resistance and super-hydrophobic surface, the water contact angle is high, the coating adhesive force is high, and the waterproof performance is lasting and stable under high-frequency bending.

The invention belongs to the technical field of polyurethane materials, and provides high-frequency high-damping low-compression permanent deformation polyurethane and a preparation method and application thereof.The high-frequency high-damping low-compression permanent deformation polyurethane is prepared from a polyol component and an isocyanate component according to the proportion that the isocyanate index is 1.05-1.15; wherein the polyol component is prepared from the following components in parts by mass: 60 to 80 parts of polyether polyol, 15 to 25 parts of a chain extender, 15 to 25 parts of a damping agent, 3 to 8 parts of nano montmorillonite, 0.03 to 0.08 part of a catalyst and 0.5 to 1.5 parts of an antioxidant; the isocyanate component is a mixture of 4, 4 '-diphenylmethane diisocyanate and hexamethylene diisocyanate in a mass ratio of (2.5-3): 1; the polyurethane material is good in damping performance and low in compression set, has certain flame retardant property, is used for preparing the base plate for the railway, has excellent vibration and noise reduction and steel rail stripping and abrasion inhibition effects, and remarkably prolongs the service life of the steel rail.

The invention provides a single-component dual-curing 3D printing photosensitive resin combined with a latent reaction source, an elastomer material and a preparation method, and relates to the technical field of 3D printing. The photosensitive resin comprises the following raw materials in parts by mass: 70-90 parts of a methacrylate-terminated polyurethane prepolymer, 1-5 parts of a compound which can be dehydrated under a heating condition, 5-15 parts of a reactive diluent and 1-5 parts of a photoinitiator, and the structural formula of the methacrylate-terminated polyurethane prepolymer is as shown in a formula II. The photosensitive resin provided by the invention introduces a substance which can be dehydrated after being heated to a specific temperature as a'latent 'reaction source. In the printing post-treatment stage, dehydration is triggered through heating, released water molecules react with part of isocyanate groups in a system, a high-activity diamine chain extender is generated in situ, and then the high-activity diamine chain extender and remaining isocyanate are subjected to efficient chain extension reaction.

The invention relates to a carbon nano reinforced thermoplastic polyurethane composite material as well as a preparation method and application thereof. The composite material is prepared from the following components in parts by mass: 5 to 20 parts of diisocyanate, 10 to 30 parts of oligomer dihydric alcohol, 1 to 10 parts of bifunctional chain extender and 1 to 20 parts of filler, the filler is prepared from the following components in parts by mass: 0.95 to 18 parts of inorganic filler and 0.05 to 2 parts of carbon-based nano filler; preparing a carbon-based nanofiller of flaky carbon nanofibers, tubular carbon nanofibers or fishbone-shaped carbon nanofibers from reaction gas by using a metal catalyst through a chemical vapor deposition method; the metal catalyst is selected from an iron-nickel catalyst or a nickel-copper catalyst, the reaction gas comprises a carbon source gas and a reducing gas, the carbon source gas is selected from carbon monoxide or ethylene, and the reducing gas adopts hydrogen. Compared with the prior art, the material has good mechanical properties and damping performance, especially has excellent normal-temperature damping performance and damping temperature range, and is suitable for 3D printing.

This application discloses a water-based sand texture paint and its preparation method, belonging to the field of water-based paint technology. The water-based sand texture paint of this application, based on 100% of the total mass of the water-based sand texture paint, includes: 1-1.5% mixed corrosion inhibitor, 1.5-3.5% film-forming aid, 10-15% water-soluble acrylic resin, 15-20% hydroxyl acrylic dispersion, 10-15% polyurethane dispersion, 10-15% precipitated barium sulfate, 10-15% glass micro powder, 0.2-0.5% coupling agent, 0.2-0.3% wetting agent, 0.3-0.5% dispersant, 0.1-0.3% defoamer, 5-10% color paste, 0.2-0.5% bentonite, 0.3-2.5% thickener, 5-7% sand texture powder, 8-10% expanded graphite, 0.5-1.5% activation period extender, and 15-20% water. The water-based sand texture paint prepared using the formula and preparation method of this application has a low odor during the coating process, is non-flammable and non-explosive, and has low toxicity, making it more suitable for widespread use, especially for use in the luggage compartment of passenger cars, with a wide range of applications.

The invention relates to the technical field of 3D printing, in particular to two-component photo-thermal dual-curing 3D printing resin and a preparation method thereof. Comprising a component A and a component B, the component B is a chain extender; the component A is prepared from the following raw materials in parts by weight: 60 to 95 parts of polyurethane acrylic resin; 0.1-30 parts of an acrylic monomer; 0.5-30 parts of a blocked isocyanate modified acrylic monomer; 0.5 to 5 parts of a photoinitiator; 1-6 parts of an auxiliary agent; the acrylic monomer is polyethylene glycol acrylate and / or an acrylate monomer containing other active groups; the blocked isocyanate modified acrylic monomer is one or a composition of more of pyrazolyl carbonyl amino group-containing acrylic ester, ketoxime carbonyl amino group-containing acrylic ester and ester carbonyl amino group-containing acrylic ester. After the 3D printing resin prepared by the technical scheme is printed and cured, relatively good printing performance, mechanical property and durability are obtained.

The application discloses a preparation method and application of modified hyperbranched polyurethane for track traffic field finish paint, and comprises the following raw materials: 2,2-dimethylol propionic acid, dicyclohexyl methane-4,4'-diisocyanate, modified chain extender and catalyst. The modified hyperbranched polyurethane containing double benzimidazole structures and curcumin and the phosphorus-nitrogen six-membered ring functional agent A containing a large number of hindered phenol structures are used in the preparation of the track traffic finish paint, so that the finish paint has excellent ultraviolet aging resistance, heat aging resistance and mechanical properties, and also has the effect of flame retardation.

The invention discloses a self-repairing bio-based coating material giving consideration to nutrient controlled release and membrane shell degradation and a preparation method of the self-repairing bio-based coating material, and belongs to the technical field of controlled release fertilizer production. The self-repairing bio-based coating material is prepared from the following raw materials in parts by weight: 80 to 100 parts of easily degradable polyester polyol, 30 to 50 parts of cross-linking promoting agent and 10 to 20 parts of functional chain extender. According to the self-repairing bio-based coating material and the preparation method thereof, the easily degradable polyester polyol reacts with the cross-linking promoting agent and the functional chain extender to synthesize the self-repairing bio-based coating material which gives consideration to nutrient controlled release and membrane shell degradation, and the self-repairing bio-based coating material can improve the toughness of a membrane material, promote rapid repairing of a damaged area and improve the service life of the membrane material. The stability of nutrient release is improved; in addition, a chain reaction of structural fracture can be triggered in the membrane material degradation process, and the degradation rate of a membrane shell after nutrients are completely released is increased. The invention effectively solves the problem that the degradation performance of the membrane shell and the controlled release performance of nutrients are difficult to coexist.

The invention discloses a 3D printing polyurethane elastomer as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The polyurethane elastomer is composed of a prepolymer containing a dynamic hydrazide urea bond and a hindered urea bond and a monomer containing primary amine, the prepolymer takes polyether polyol and diisocyanate as basic raw materials, a dynamic hydrazide urea bond hard segment is introduced into the prepolymer through a hydrazide chain extender, a side chain is introduced through glycidyl methacrylate, and the primary amine-containing monomer is prepared. A dynamic hindered urea bond and a photocuring group are introduced through an acrylate end-capping reagent, and a reactive diluent and a photoinitiator are matched to optimize the forming performance. In the preparation process, a prepolymer and a primary amine-containing monomer are mixed and then subjected to 3D printing forming, in the low-temperature stage, reversible exchange of dynamic hydrazide urea bonds and hindered urea bonds is promoted to heal interlayer defects, and in the high-temperature stage, the hindered urea bonds are triggered to break and react with primary amine to form a stable cross-linked network. The 3D printing polyurethane elastomer has excellent rebound resilience, mechanical strength and hydrophobic effect.

This application provides a self-healing polyurethane material, its preparation method, and its applications, relating to the field of polymer materials technology. The material uses a polyurethane matrix constructed from polyols and polyisocyanates, and introduces aromatic polyaldehyde compounds to form reversible dynamic bond structures with hydrazine compounds, thereby endowing the material with excellent self-healing properties. By controlling the type of chain extender and the melt blending process conditions, the material can achieve crack healing and restore mechanical properties after damage, while also possessing good flexibility, processability, and stability. The preparation process of this application is simple and the conditions are mild. The resulting material can be widely used in coatings, seals, and elastomers, significantly improving material service life and reliability.

The invention relates to the field of seismic isolation materials, in particular to a seismic isolation material for a continuous track and a preparation method of the seismic isolation material. The shock insulation material is prepared by compounding a component A and a component B according to the weight ratio of 100: (35-70), wherein the component A is prepared from the following components in parts by weight: polytetramethylene ether glycol, polyether polyol, ethylene glycol, diazabicyclo, foam-stabilizing silicone oil, water and black pigment; wherein the component B is modified isocyanate and comprises the following components in parts by weight: polytetramethylene ether glycol, diphenylmethane diisocyanate and a modified chain extender. According to the continuous track shock insulation material prepared by the invention, a formula and a preparation mode are optimized, polytetramethylene ether glycol, polyether polyol and modified isocyanate are compounded according to a specific ratio, and a modified chain extender is introduced, so that the material has adjustable static rigidity and low fatigue sensitivity, and is low in performance attenuation under long-term bearing; the vibration isolator is suitable for long-term vibration isolation of rail transit.

The application relates to the technical field of inks, and discloses a long-acting coagulation ink formula, a preparation method and application, the ink comprising a water-based polyurethane emulsion, pigments, a defoaming agent and a dispersing agent; the water-based polyurethane emulsion formula is polytetrahydrofuran glycol, glycerol monooleate, isophorone diisocyanate, a chain extender and a hindered phenol crosslinking agent; the hindered phenol crosslinking agent is prepared and introduced into a molecular chain segment of the water-based polyurethane binder, linear water-based polyurethane macromolecules are linked in the form of chemical bonds, a crosslinked network structure is formed, molecular chain movement is limited, aggregation is not easy, gel during storage can be reduced, and the hindered phenol is linked to the polyurethane molecular chain through chemical bonds, free radicals are captured by the hindered phenol groups, and the phenomenon of ink skinning, gelation and coagulation of the polyurethane ink caused by oxidation during storage and use is avoided; the ink has excellent stability, adhesion, skinning resistance, rubbing resistance and alcohol resistance.

The invention relates to an embedded isocyanate polyurethane elastomer and a preparation method and application thereof, and mainly solves the problems that in the prior art, self-repairing is completed in a microcapsule mode, the cost is high, and the strength is poor. The volume ratio of the component A to the component B is 1: 1, and the component A comprises the following components in parts by weight: 50-95 parts of isocyanate I and 5-50 parts of isocyanate II; the component B comprises the following components in parts by weight: 50-95 parts of polyol, 5-30 parts of a chain extender, 0-1.0 part of a catalyst, 0-2.0 parts of an ultraviolet stabilizer and 0.5-2.0 parts of color paste. According to the technical scheme, the problems are well solved, and the polyurethane elastomer can be applied to preparation of waterproof, anticorrosive and wear-resistant protective coatings.

The invention relates to the technical field of films, in particular to an optical composite film of a composite polylactic acid core layer and a preparation method of the optical composite film. The optical composite film is of a three-layer structure and comprises a composite polylactic acid core layer made of specific raw materials and amorphous polylactic acid skin layers on the two sides. The core layer is prepared from the following raw materials: poly (L-lactic acid) resin, poly (D-lactic acid) macromolecules, carboxyl-terminated poly (D-lactic acid) oligomers, a multifunctional epoxy chain amplification agent and aminated nano silicon dioxide. During preparation, key processes such as step-by-step addition of the chain extender, the D-lactic acid component and the aminated nano silicon dioxide and three-layer co-extrusion stretching are carried out, so that the molecular structure and the dispersion state of the material are synergistically optimized. The method effectively solves the technical contradiction that a traditional polylactic acid optical film is difficult to consider high light transmittance, low birefringence and low thermal shrinkage at the same time.

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.

An inkjet printer is described. The inkjet printer has a substrate holder assembly that includes a base member having a long axis in a first direction and a short axis in a second direction perpendicular to the first direction; a contact member coupled to the base member, the contact member having a long axis in the first direction and a short axis in the second direction; a holder carriage coupled to the base member; a linear extender coupled between the base member and the contact member and extending in a third direction intersecting with the first direction and the second direction from the base member toward the contact member; and a flex member coupled to the base member, extending in the second direction between the linear extender and the contact member, and having a flex direction in a direction perpendicular to the first direction and the second direction.

The invention discloses a composite organic silicon modified waterborne polyurethane emulsion for digital ink-jet ink and a preparation method and application thereof, and the preparation method comprises the following steps: (1) carrying out vacuum dehydration on polyol, an anionic hydrophilic agent, a nonionic hydrophilic agent and silicone oil, adding polyisocyanate to carry out a polymerization reaction, then adding a chain extender to carry out a chain extension reaction, and carrying out vacuum drying to obtain a polyurethane emulsion; a polyurethane prepolymer 1 is prepared; (2) adding the polyurethane prepolymer 1 into a diamine silane coupling agent under high-speed stirring for reaction, and supplementing an organic solvent in the reaction process to control viscosity so as to prepare a polyurethane prepolymer 2; (3) adding water into the polyurethane prepolymer 2, and emulsifying under a high-speed shearing condition to obtain a prepolymer emulsion; (4) adding a post chain extender into the prepolymer emulsion, and stirring at a high speed to carry out a post chain extension reaction, so as to obtain a waterborne polyurethane emulsion; the particle size of the emulsion is stabilized below 40 nm, the water absorption rate can be reduced to 4.12% to the minimum, and the performance of the emulsion is superior to that of a conventional nano-particle-size waterborne polyurethane emulsion.

The invention discloses a high-performance waterborne polyurethane primer applied to an optical-grade biaxially oriented polyester film and a preparation method of the high-performance waterborne polyurethane primer, and belongs to the field of waterborne polyurethane primer. The primer is prepared from the following raw materials in parts by weight: 52 to 68 parts of polyester polyol, 4 to 7 parts of sulfonate polyester polyol, 1 to 3 parts of polyether polyol, 1 to 6 parts of carboxylic acid type hydrophilic compound, 16 to 38 parts of isocyanate, 0.1 to 0.5 part of alcohol chain extender, 1 to 5 parts of amine chain extender, 0.02 to 0.06 part of catalyst, 1 to 6 parts of neutralizer, 160 to 280 parts of acetone, 1340 to 1740 parts of deionized water, 0.3 to 2 parts of silane coupling agent, 0.3 to 1 part of defoaming agent, 1 to 5 parts of wetting agent and 260 to 300 parts of isopropanol. And 4-7 parts of a closed curing agent. The primer prepared by the invention has good high-temperature yellowing resistance on an optical-grade biaxially oriented polyester film, is free of stripes after being coated, has the adhesive force of grade 0, and also has the advantages of flame retardance, environment friendliness, no toxicity, low VOC (Volatile Organic Compounds), low odor and the like.

The application discloses a preparation method of a self-repairing super-hydrophobic composite bio-based polyurethane coating and relates to a polyurethane coating preparation method, which takes Jatropha curcas oil as raw material, takes alcohol as a ring-opening agent, prepares Jatropha curcas-based polyester polyol, and prepares a self-repairing super-hydrophobic composite bio-based polyurethane by using polytetrahydrofuran as a chain extender. The introduction of the synergistic self-repairing function of the double dynamic network structure enhances the mechanical strength and elasticity of the material. The disulfide bond and hydrogen bond in the polyurethane can be dynamically broken and reconnected, so that the damaged area can be self-repaired without external intervention. The introduction of the super-hydrophobic function can effectively resist the adhesion of water and other liquids on the surface of the material, which not only greatly enhances the resistance of the material to the external environment, but also exhibits excellent protective performance in the initial use stage of the material, which is particularly crucial for maintaining the structural integrity and aesthetic appearance of the material. The self-repairing super-hydrophobic ability greatly prolongs the service life of the material and reduces the maintenance cost.

The present application relates to a kind of modified polyurethane dispersions and its preparation method, the modified water-based polyurethane dispersion includes the following raw materials: polyisocyanate, macromolecular polyol, silicon diol, hydrophilic chain extender, modified monomer.The printed coating prepared by the modified polyurethane dispersion of the present application has excellent water wash resistance on silicone oil treated cloth.

The invention discloses a waterborne polyurethane gravure ink binder as well as a preparation method and application thereof. The preparation method comprises the following steps: adding polymeric polyol into a flask, heating to 110-120 DEG C, carrying out decompression dehydration for 1-2 hours, cooling to 70 + / -3 DEG C, adding diisocyanate, heating to 85-90 DEG C, adding a catalyst, and carrying out heat preservation reaction for 2 hours; cooling to 50 + / -3 DEG C, adding a hydrophilic chain extender, a diol chain extender, a cross-linking agent and acetone, keeping the temperature at 70-75 DEG C to react for 2-4 hours, and measuring the content of NCO; after the NCO content reaches 4.8%, acetone is added for dilution and cooling to below 50 DEG C; adding an adhesive force chemical accelerant and an adhesive force physical accelerant, and keeping the temperature at 50-55 DEG C for 40 minutes to obtain a prepolymer solution; pouring the prepolymer solution into a dispersion kettle, adding a neutralizer, adding deionized water under a high-speed shearing machine to perform emulsification dispersion, dropwise adding a diamine post chain extender to perform post chain extension operation after the prepolymer solution is completely dispersed, and reducing pressure to remove acetone; the water-based ink binder product prepared by the invention has good adhesive force on various base materials.

This invention relates to a food-grade PHA-modified 3D printing filament and its preparation method, comprising the following components in parts by weight: 90-98 parts by weight of food-grade PHA resin, 0.5-3 parts by weight of food-grade chain extender / rheology modifier, 0.5-2 parts by weight of food-grade polyester toughening agent, and 0.1-0.8 parts by weight of food-grade thermo-oxidative stabilizer. Unlike existing technologies, the chain extender / rheology modifier in this invention enhances the melt strength of PHA and improves FDM printing processing performance; the polyester toughening agent improves material brittleness and enhances filament toughness and interlayer bonding; and the thermo-oxidative stabilizer inhibits thermal degradation during processing, ensuring material stability. The PHA-modified 3D printing filament obtained after melting and drawing the above components meets food contact safety requirements and is fully biodegradable; when used in 3D printing, it produces products with low warpage and strong interlayer bonding. This filament can be used to print complex hollow structural parts.

The invention relates to the field of chemical engineering, in particular to a waterborne polyurethane coating agent emulsion and a preparation method thereof. The preparation method provided by the invention comprises the following steps: mixing dihydric alcohol and isocyanate, and heating to react; then, adding a hydrophilic chain extender, and continuously reacting; then, cooling, adding a catalyst and a solvent, and further reacting to obtain a reactant 1; then, adding a neutralizer into the reactant 1 to carry out neutralization reaction; and adding water for dispersion, adding an amine chain extender, stirring for reaction, and removing the solvent to obtain the waterborne polyurethane coating agent emulsion. Wherein the dihydric alcohol is prepared by matching specific crystalline polycarbonate dihydric alcohol and hydroxyl-terminated polybutadiene, and the hydrolysis resistance, the low-temperature bending resistance and the dry and wet rubbing resistance of the waterborne polyurethane can be effectively improved in combination with selection and condition control of other raw materials.

Provided are methods of forming a three-dimensional object that include irradiating a resin composition of the invention with actinic radiation or light, thereby forming a three-dimensional intermediate, and then further reacting the three-dimensional intermediate to form the three-dimensional object. In some embodiments, resin compositions of the invention include a polyisocyanate such as, e.g., a reactive blocked polyisocyanate; a polyfunctional epoxy compound; a photoinitiator; optionally, a catalyst; optionally, a polyol and / or a polyamine chain extender; optionally, a reactive diluent; optionally, a pigment or dye; and optionally, a filler. Related resin compositions are also provided herein. Further, provided are three-dimensional objects formed by a method of the invention, including, e.g., objects formed of a polymer having at least one oxazolidinone linkage.

The invention relates to the technical field of multi-layer polyester functional films, in particular to an optical antistatic polyester multi-layer composite functional film and a preparation method thereof. The problem that in the prior art, the optical performance and the antistatic performance of a polyester multilayer composite functional film cannot be considered at the same time is solved. The preparation method comprises the following steps: by adopting a surface layer-middle layer-surface layer three-layer structure, by taking terephthalic acid and ethylene glycol as raw materials, adding 1, 4-cyclohexanedimethanol and isophthalic acid for copolymerization, so as to prepare a copolymerized polyester base material; wherein the surface layer consists of a copolymerized polyester base material and an antistatic functional master batch; the middle layer is composed of a copolymerized polyester base material, an ultraviolet-resistant functional master batch and a chain extension toughening agent, and the three layers of materials are subjected to co-extrusion, two-way stretching and heat setting processes to prepare the polyester multi-layer composite functional film; the optical performance and the antistatic performance are cooperatively optimized through the multi-layer function partition design, and the liquid crystal display panel can be applied to the high-end optical fields such as liquid crystal display, touch panels and photovoltaic backboards.

The application belongs to the technical field of polyurea coating and specifically relates to a single-component high-performance polyurea coating and a preparation method thereof.The single-component high-performance polyurea coating comprises the following raw materials in parts by weight: diisocyanate 60-100 parts, diluent 30-50 parts, polyether polyol 100-140 parts, leveling agent 0.3-0.5 parts, defoaming agent 0.6-1 part, silane coupling agent 30-50 parts, chain extender 30-35 parts, catalyst 3-5 parts, europium-doped molybdenum sulfide coated with tin phytate 10-20 parts, and Cu3P@ZIF-7 5-15 parts.In the application, the europium-doped molybdenum sulfide coated with tin phytate and Cu3P@ZIF-7 are added, the interaction of the above components is utilized, the flame retardation and mechanical properties of the polyurea coating are promoted, the performance is excellent, and the application range is wide.

The present application relates to the technical field of temperature-sensitive color-changing film, and particularly relates to a preparation method of a temperature-induced double-response film, the film and application thereof. The preparation method comprises the following steps: S1: mixing a color developing agent, a reversible thermochromic dye, a phase change regulator and an encapsulating material, then adding water, preparing an emulsion through high-speed shearing, increasing temperature, self-assembling the emulsion at high temperature, and then sequentially performing suction filtration, washing and drying to obtain temperature-sensitive color-changing microcapsules; S2: dispersing the temperature-sensitive color-changing microcapsules in an organic solvent, then adding a surface activation modifier to obtain modified temperature-sensitive color-changing microcapsules; S3: mixing a base polymer and an epoxy chain extender, then extruding and granulating to obtain a chain-extended base polymer; S4: mixing the chain-extended base polymer and the modified temperature-sensitive color-changing microcapsules, then extruding and granulating, and then casting a film. The temperature-induced double-response film can simultaneously realize high-temperature irreversible response and low-temperature reversible response, and is suitable for preparing food intelligent labels or intelligent packaging.