31 results about "Interpenetrating polymer network" patented technology

This invention relates to the field of protective coating technology for ships and marine engineering equipment, specifically to a high interfacial bonding strength gradient bonding layer and its preparation method. The preparation method includes grafting epoxy resin with γ-glycidoxypropyltrimethoxysilane; dissolving the modified epoxy resin, polydimethylsiloxane, and their respective curing agents in an organic solvent to obtain a blended resin precursor; coating the precursor onto the surface of an anti-corrosion paint and curing it to form a film. By controlling the migration rate of the resin components and the curing reaction rate during the curing process, a continuous gradient distribution structure is formed from the coating air interface to the substrate interface, with the concentration of modified epoxy resin continuously increasing and the concentration of polydimethylsiloxane continuously decreasing. This invention, through the synergistic regulation of thermodynamics and kinetics, forms an interpenetrating polymer network structure within the bonding layer, significantly improving the interfacial bonding strength and long-term service stability between the anti-corrosion paint and the antifouling paint.

This invention discloses the application of a self-healing epoxy-acrylate interpenetrating polymer network anti-corrosion coating in a seawater environment, belonging to the technical field of marine anti-corrosion coating materials. The self-healing epoxy-acrylate interpenetrating polymer network anti-corrosion coating includes a coating matrix and hydrophobic self-healing microcapsules uniformly dispersed within the coating matrix. The coating matrix is ​​formed by interpenetrating polymerization of epoxy resin, acrylate, and a curing agent. The hydrophobic self-healing microcapsules have a core-shell structure, including a core and a wall. The core is an oil-based healing agent, and the wall is a hydrophobic polymer material. This invention achieves cross-linking polymerization and curing through the interaction of the oil-based healing agent with dissolved oxygen in the water, without relying on an additional curing agent, greatly reducing the interference of the seawater environment on the curing reaction. The synergistic system of the hydrophobic self-healing microcapsules and the coating matrix constructed in this invention achieves the integration of in-situ self-healing and long-term anti-corrosion in underwater environments.

The application relates to the technical field of electric wire and cable, and discloses a fluoroplastic insulation high-temperature-resistant fireproof cable and a preparation method, the cable comprises a conductor layer, the conductor layer is twisted by multiple copper wires, the conductor layer is coated with a fluoroplastic insulation layer, the fluoroplastic insulation layer is coated with a shielding layer, the shielding layer is a copper-belt woven structure, the shielding layer is coated with an armor layer, the armor layer is woven by stainless steel wires, the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in mass fractions: functionalized ethylene-tetrafluoroethylene copolymer, 50-70 parts by mass. The application constructs an interpenetrating polymer network formed by in-situ crosslinking of a functionalized fluoropolymer and an organic silicon elastomer in the sheath layer, and adopts an energy field gradient response vulcanization process, so that the prepared cable sheath keeps the inherent high-temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved.

The application provides a bipolar membrane and a preparation method and application thereof. The bipolar membrane comprises a cation exchange layer, an anion exchange layer and an interface catalytic enhancement layer arranged between the cation exchange layer and the anion exchange layer; the cation exchange layer is a cation exchange membrane containing sulfonic acid groups, the anion exchange layer is an anion exchange membrane containing quaternary ammonium groups; the interface catalytic enhancement layer is an interpenetrating polymer network structure containing Cu-ZIF, the interpenetrating polymer network structure is a crosslinked network of epoxy modified polystyrene and acrylate; the cation exchange layer and the interface catalytic enhancement layer are combined through covalent bonds; the anion exchange layer and the interface catalytic enhancement layer are combined through electrostatic adsorption. In the interface catalytic enhancement layer, the stable loading of the catalyst is realized by using Cu-ZIF, and the firm combination between the bipolar membrane layers is realized by using the interpenetrating polymer network structure.

This invention discloses a photo / thermal dual-curing bio-based UV ink composition and its preparation method, relating to the field of UV-curable printing materials. It comprises the following raw materials in parts by weight: 100 parts of polypropylene carbonate diol-type polyurethane acrylate oligomer, 5-20 parts of a thermosetting component, 50-150 parts of an reactive diluent, 2-10 parts of a free radical photoinitiator, 0-80 parts of a colorant, and 0-10 parts of other additives; the thermosetting component includes eugenol-furfurylamine type benzoxazine monomer. The UV ink composition obtained by this invention can be heat-treated after photocuring. The polybenzoxazine network is interpenetrated after the formed polyurethane acrylate pre-crosslinked network, forming an interpenetrating or interpenetrating polymer network, and additional crosslinking can occur. This not only improves the strength and flexibility of the ink layer but also effectively enhances solvent resistance and adhesion, resulting in a UV ink composition with excellent overall performance.

This invention discloses a 3D printing composition based on the synergistic effect of RAFT and interpenetrating polymer networks, comprising a free radical crosslinking monomer, a diepoxy monomer, a RAFT chain transfer agent, and a cationic photoinitiator. The composition undergoes a synergistic reaction of RAFT polymerization and cationic ring-opening polymerization under light irradiation to form an interpenetrating polymer network structure. This invention selects specific ratios of free radical crosslinking monomer, diepoxy monomer, and RAFT chain transfer agent, and performs a synergistic reaction of RAFT polymerization and cationic ring-opening polymerization under light irradiation to form an interpenetrating polymer network structure, achieving a balance between strength and toughness. It maintains high toughness while maintaining high strength, thus meeting the requirements for both high strength and high toughness.

This invention relates to the field of adhesive technology, specifically to an interface-stabilizing adhesive for silicon anodes and its preparation method. The adhesive comprises curcumin-modified silicon-containing waterborne polyurethane-acrylate, a terpolymer, and a multifunctional monomer, wherein the mass ratio of the curcumin-modified silicon-containing waterborne polyurethane-acrylate, the terpolymer, and the multifunctional monomer is 3-5:1-2:1-1.2. The curcumin-modified silicon-containing waterborne polyurethane-acrylate is synthesized using acrylate and γ-methacryloyloxypropyltrimethoxysilane as modifiers and curcumin as a chain extender via an interpenetrating polymer network method. Through chemical bonding such as grafting and crosslinking, and supramolecular interactions such as hydrogen bonding and coordination, an intelligent network integrating elastic buffering, rigid support, interface passivation, self-healing, and ion conduction is constructed. After cycling, the electrode thickness expansion rate is controlled to <40%, with no macroscopic cracks and high electrode peel strength retention.

The application relates to the technical field of high polymer composite materials and thermoplastic elastomer modification, and discloses a wear-resistant thermoplastic elastomer and a preparation method thereof. The thermoplastic elastomer is composed of a thermoplastic elastomer matrix and a wear-resistant modification component dispersed in the matrix, the wear-resistant modification component comprises bio-based hyperbranched polysiloxane, nano ceramic particles and short-cut glass fibers; wherein the bio-based hyperbranched polysiloxane forms a semi-interpenetrating polymer network with the matrix, the short-cut glass fibers form a microfiber structure in a melting process, and a reversible dynamic covalent crosslinking structure is further introduced into the matrix, so that the material has certain network reconstruction and self-repairing capacity under the action of friction heat. The application also discloses a corresponding preparation process. The material has low abrasion, low friction coefficient, high tensile strength, high elongation at break and good self-repairing performance, and is suitable for the preparation of products such as wear-resistant sealing parts, wear-resistant conveying components and flexible protection components.

Microfibers and nanofibers containing quaternary ammonium polymers and / or interpenetrating polymer networks are provided. For example, a microfiber or nanofiber including a blend, composite, or interpenetrating polymer network is provided. The blend, composite or interpenetrating polymer network can include (i) a polyethyleneimine intermediate, in which the polyethyleneimine intermediate includes a reaction product of reagents including a polyethyleneimine and one or more alkylating agents; at least one of the one or more alkylating agents introduces hydroxyl group functionality or thiol group functionality on the polyethyleneimine intermediate; and nitrogen atoms present in the polyethyleneimine intermediate that are partially or completely quaternized by the one or more alkylating agents; and (ii) a hydroxy-functionalized oligomer, polymer, or copolymer including pendant and / or terminal hydroxy group(s).

In examples, the present application discloses an indwelling medical device such as a catheter and other medical devices, which may include a core region and a surface region which may include an interpenetrated polymer network, the interpenetrated polymer network may include a primary polymer network and a secondary polymer network.

An example of a flow cell includes a substrate and a resin molded and cured on the substrate. The molded and cured resin has nanodepressions separated by interstitial regions. Each nanodepression has a maximum aperture dimension ranging from approximately 10 nm to approximately 1000 nm. The molded and cured resin also includes an interpenetrating polymer network. This network comprises an epoxy-based polymer and a (meth)acryloyl-based polymer.

This invention discloses an interpenetrating polymer network (IPN) material for the efficient purification of volatile organic compounds (VOCs) and its preparation method. The method first employs a B-H (-NO2) coupling method, using tris(4-nitrophenyl)amine or p-dinitrobenzene as the core component, and various aromatic amine linkers to construct a primary conjugated microporous polymer network (N-CMPs) under a palladium catalysis system. Subsequently, through post-molecular weaving and expansion technology, secondary crosslinking is carried out using p-phenylenedichlorobenzyl or acyl chloride external crosslinking agents under Lewis acid catalysis, significantly improving the density and specific surface area of ​​the framework. The prepared HCCP1-X series materials exhibit a saturated adsorption capacity of 961 mg / g for toluene and 895 mg / g for ethyl acetate at 25 °C, providing a new pathway for the development of highly efficient VOCs adsorbents.

The application discloses an adsorbent, a preparation method and application thereof. The adsorbent comprises activated carbon, montmorillonite, chitosan, anion exchange resin, polyvinyl alcohol, a crosslinking agent and a porogen. The chitosan is intercalated into the interlayer of the montmorillonite under acidic conditions to form an intercalation complex. The chitosan and the polyvinyl alcohol form an interpenetrating polymer network under the action of the crosslinking agent. The intercalation complex, the activated carbon and the anion exchange resin are fixed in the interpenetrating polymer network. Through multi-component synergistic compounding and the introduction of the porogen, a composite adsorption system with rich pore structure is constructed. The composite adsorption system not only realizes full-spectrum and high-efficiency removal of cations, anions and complex heavy metals in landfill leachate, but also significantly improves the mass transfer efficiency and long-term water stability of the material, and has good industrial application prospect.

The application discloses a kind of dynamic double-network shear thickening protective materials and preparation method thereof, it is related to the technical field of protective function polymer material;The material has double continuous interpenetrating polymer network structure, including three-dimensional continuous physical shear thickening network and three-dimensional continuous covalent crosslinking chemical network which are mutually penetrated and entangled, the dispersed phase area of two phases under 5000 times scanning electron microscope is less than 100nm, the interface between two networks is combined by non-covalent bond, so that nano-particle can be freely sheared and induced to aggregate, while inhibiting sedimentation and cold flow;Double-network dry mass ratio is 5:1~10:1, double-network interpenetration degree is 40%~70%, and crosslinking density is 1×10⁻⁴ mol / cm³~5×10⁻⁴ mol / cm³;The application also provides intermittent and continuous preparation methods, and impact protective products comprising the material.The application breaks through the technical prejudice in the field, solves the problem that the protective performance and stability of existing materials cannot be considered, and is suitable for various impact protection scenes.

This invention relates to the field of coating technology, specifically to a water-based interpenetrating polymeric network toughening coating and its preparation method. The coating is composed of component A and component B mixed at an epoxy-active hydrogen molar ratio of 1:0.8–1.1. The overall solution of this invention achieves comprehensive optimization in corrosion resistance, weather resistance, toughness, and workability, possessing the application value of a combined topcoat and base coat. Due to the excellent weather resistance provided by the acrylate component in the interpenetrating network, the yellowing and chalking of the epoxy component are inhibited, allowing for long-term outdoor use of the coating. The dense and continuous network structure significantly improves water resistance, acid and alkali resistance, and salt spray resistance, with salt spray protection duration far exceeding that of conventional water-based epoxy coatings. Simultaneously, the coating adhesion is significantly improved, achieving a firm bond on both metal and existing coating surfaces, allowing for single-layer film formation to meet both protective and decorative requirements during application. Due to the synergistic effect of each structural unit and functional component, an environmentally friendly coating with high toughness, high density, strong corrosion resistance, and good weather resistance is ultimately obtained.

This invention discloses a high-humidity-heat-resistant, durable, water-based biodegradable glass ink and its preparation method. The ink, by weight, comprises: 50-65 parts waterborne polyurethane resin, 12-20 parts waterborne acrylic resin, 4-10 parts polyisocyanate curing agent, 1-3 parts silane coupling agent, 0.2-1.5 parts amine neutralizing agent, and 0.2-1.5 parts thickener, etc., wherein the weight ratio of polyisocyanate curing agent to amine neutralizing agent is 5:1 to 16:1. The preparation process employs a method of "first grinding, then adding the coupling agent and curing agent in steps." This invention utilizes a dense interpenetrating polymer network structure formed by waterborne polyurethane (containing polyester segments) and waterborne acrylic acid (self-crosslinking). This network slows down the water vapor permeation rate in a humid and hot environment, keeping the hydrolysis rate of the polyester segments below the critical value for adhesion failure. At the same time, under standard composting conditions (higher temperature, longer time), the polyester segments can still be fully hydrolyzed. This achieves a synergistic improvement in adhesion retention rate ≥90% after 500 hours of humid and hot cycling aging and degradation rate ≥80% after 12 months of standard composting. It overcomes the technical prejudice that "degradability" and "humid and hot durability" cannot be achieved simultaneously, and is suitable for high-reliability scenarios such as 3C electronic glass.

The application discloses a kind of preparation methods of high breaking elongation PVC film, it is related to PVC film technical field.The method includes: S1 according to formula and take high polymerization degree PVC resin, polyether type TPU, macromolecular polyester plasticizer and crosslinking agent etc.Pretreatment compound;S2 carry out ladder type high-speed kneading and cold mix curing and get dry mixture;S3 is extruded granulation by double screw dynamic micro-crosslinking, constructs the semi-interpenetrating polymer network (Semi-IPN) structure of PVC and TPU;S4 carries out multistage melting filtration and ultrasonic wave auxiliary exhaust and gets dense melt;S5 is formed by inverted L type four-roll precision calendering;S6 is fully released internal stress by gradient hot air annealing and decreasing microtension traction;S7 is obtained by gradient cooling and low-tension anti-sticking winding.The application breaks the "seesaw effect" of material elongation and mechanical strength, completely eradicates plasticizer precipitation, and eliminates residual internal stress and stress concentration source, and high-quality PVC film with extremely high breaking elongation, strong toughness and excellent dimensional stability is prepared.

The application discloses a kind of high viscosity and toughness modified asphalt for ultra-thin overlay, including the following components by weight parts: 100 parts of road petroleum asphalt, 4-9 parts of multi-walled carbon nanotube modified maleic anhydride grafting polymer, 3-7 parts of thermoplastic resin, 2-5 parts of tackifier, 0.5-0.8 parts of warm mixing agent, 1-5 parts of high elastic agent, 0.1-0.3 parts of stabilizer.The application also discloses a preparation method of the high viscosity and toughness modified asphalt for ultra-thin overlay.The high viscosity and toughness modified asphalt for ultra-thin overlay provided in the application forms interpenetrating polymer network structure by multi-walled carbon nanotube modified maleic anhydride grafting polymer and thermoplastic resin and asphalt phase, which greatly increases the cohesive force and interaction force between molecules;At the same time, asphalt component molecules will wind or adhere to the tube wall of carbon nanotube, the intermolecular interaction of system is further enhanced, and the problem of insufficient viscosity and toughness of asphalt is improved.

This invention discloses an integrated pultrusion-winding-spraying process for continuous production of intelligent composite tubes. This process achieves high-efficiency manufacturing through continuous integrated operations: 2DPA-1 intelligent inner liner tubes with pre-embedded carbon nanotube meshes are continuously pulled through the production line by a traction machine at a uniform speed; at the winding station, basalt fiber tape is wound onto the outer wall of the inner liner tube at a winding angle of ±15°~±45°, a tension of 50~200N, and a linear speed of 0.5~3.0m / min, while simultaneously impregnating with rare earth ATSP resin; at the spraying station, the ATSP functional layer and the wear-resistant outer protective layer are simultaneously sprayed; after online segmented curing, the process sequentially completes 150℃ pre-curing to form an interpenetrating polymer network, 280℃ deep curing to achieve structural shaping, and 300℃ pulse activation to pre-activate the Diels-Alder dynamic bonds; finally, an electromagnetic barcode is laser-marked online and an intelligent connector is assembled. This invention enables continuous production of intelligent composite tubes throughout the entire process, increasing production efficiency by 5 times and reducing costs by 40%, and is suitable for industrial mass production of all specifications from Φ60.3 to Φ177.8mm.

The present application relates to a kind of preparation process and coating of high temperature composite wave-absorbing stealth coating, it is related to wave-absorbing paint technical field.The process includes the following steps: preparation modified composite powder;Prepolymer is prepared;Composite wave-absorbing stealth coating is prepared;Composite wave-absorbing stealth coating is prepared.The present application is by with methyl phenyl organosilicon modified polyimide resin as matrix, main chain contains rigid imide ring and high energy silicon-oxygen bond, can keep structure intact in high temperature environment for a long time, and amino propyl end-capped polymethylphenylsiloxane is connected into main chain, can make resin molecular chain still can keep certain chain segment movement ability in extremely cold environment, endow matrix intrinsic low temperature flexibility, while fluorine rubber 246 and modified polyimide melt blend, can form " island type interpenetrating polymer network", can effectively absorb thermal stress in extremely cold environment, prevent microcrack initiation and expansion, realize low temperature not brittle, not cracking.

The application discloses a kind of Nano-Al2O3 / polyurethane-epoxy resin composite grouting material and preparation method thereof.First, corresponding raw materials are treated by vacuum dehydration, and the treated raw materials are prepared into polyurethane prepolymer in a condensation reflux device, then the polyurethane prepolymer and epoxy resin continue to be prepared into polyurethane-epoxy resin emulsion in the condensation reflux device, finally Nano-Al2O3 and various additives are added, and the final Nano-Al2O3 / polyurethane-epoxy resin composite grouting material is obtained after curing.The polyurethane and epoxy resin used in this paper can effectively form interpenetrating polymer network (IPN), and the added Nano-Al2O3 can be uniformly dispersed in the network structure, so that the comprehensive performance of the material is greatly improved, and the application field is very wide.The polyurethane and epoxy resin used in the application are both water-based, and the volatile organic compounds are very few, so it is very friendly to the environment.

The application relates to the technical field of protective materials, and discloses a chemical permeation resistant shoe material based on organic silicon modified polymer, which comprises fluorosilicone rubber, vinyl MQ silicone resin, triallyl isocyanurate, nitrile rubber, liquid carboxyl-terminated nitrile rubber, 3-glycidyl ether oxypropyl trimethoxysilane, zinc acetylacetonate, precipitated white carbon black and peroxide crosslinking agent. During preparation, the fluorosilicone masterbatch is mixed with the nitrile rubber, the modifier and the catalyst are added, reactive mixing is carried out at a specific temperature, a negative pressure is applied to remove small molecular byproducts, and finally, the fillers and the crosslinking agent are added to perform mold pressing. The application promotes the ring-opening esterification reaction of the carboxyl-terminated nitrile rubber and the silane coupling agent, makes the nitrile phase and the fluorosilicone phase be chemically bonded, improves the interface compatibility, forms a microcosmic co-continuous structure and an interpenetrating polymer network in the material, reduces the free volume, and improves the chemical permeation resistance and the mechanical properties of the material.

An electrolytic paper for aluminum electrolytic capacitors includes an upper surface layer, an intermediate support layer, and a lower surface layer. Both the upper and lower surface layers comprise cotton pulp fibers and / or hemp pulp fibers, while the intermediate support layer comprises aramid fibers. An interpenetrating polymer network is formed between the upper and lower surface layers and the intermediate support layer using active functional groups of polyacrylic acid or polyglycidyl methacrylate and its derivatives. In this invention, the intermediate support layer exhibits extremely high insulation strength and thermal stability, resulting in a 30%-50% or higher breakdown voltage of the composite electrolytic paper compared to pure natural fiber electrolytic paper of the same basis weight, demonstrating superior voltage withstand performance. Furthermore, the interpenetrating polymer network formed between the upper and lower surface layers and the intermediate support layer using polyacrylic acid or polyglycidyl methacrylate and its derivatives ensures rapid and thorough wetting of the electrolyte and long-term electrolyte retention, thereby ensuring capacitor capacity and reducing ESR.

The application discloses an intelligent response adhesive and a preparation method and application thereof. The intelligent response adhesive is composed of an interpenetrating polymer network containing a dynamic reversible bond, and reversibly undergoes a conformational transition of "adhesion-slippage" triggered by temperature. The intelligent response adhesive provided by the application presents an extended "adhesion conformation" of the adhesive molecular chain under room temperature conditions, and the molecular chain reversibly folds when heated to a trigger temperature, so that the adhesive molecules are transformed into a dense "slippage conformation", and the viscosity is reduced, thereby realizing zero-residue peeling. After cooling, the molecular chain can recover to the extended state, thereby realizing the repeated use of the intelligent response adhesive. Meanwhile, the intelligent response adhesive is used for preparing a tape product, and a heat-sensitive layer is formed on the surface of the tape, which can change color at the trigger temperature through the thermochromic microcapsules, thereby realizing the visualization of the tape, and realizing the comprehensive use effect of zero residue, repeatability and visualization of the tape product.

The present application relates to a kind of high Tg modified high modulus bismaleimide resin composition and its preparation method, prepreg and application, the bismaleimide resin composition includes: 5-10 parts of bisphenol A double allyl ether, 50-80 parts of bismaleimide resin, 5-20 parts of cyanate resin, 5-15 parts of epoxy resin;The molecular main chain of the bismaleimide resin includes aromatic ring or biphenyl structure;The epoxy resin includes multiple continuous aromatic heterocyclic epoxy resin, phenol biphenyl type epoxy resin or triphenylmethane type epoxy resin.Aiming at the problem that the Tg of existing conventional bismaleimide prepreg system is generally limited to below 350 DEG C, due to the establishment of bismale-imide-triazine-oxazoline ketone full interpenetrating polymer network, the crosslinking density reaches the extreme, the glass transition temperature of system is stably jumped to above 387 DEG C (the physical extreme deduction is more than 390 DEG C), thereby having the ability of long-term safe bearing under the harsh thermodynamic environment of more than 350 DEG C.

The application discloses a nanoparticle modified polyurethane-epoxy resin composite grouting material and a preparation method thereof. Firstly, vacuum dehydration treatment is carried out on corresponding raw materials, polyurethane prepolymer is prepared from the treated raw materials in a condensation reflux device, then the polyurethane prepolymer and epoxy resin are continuously prepared into polyurethane-epoxy resin emulsion in the condensation reflux device, finally Nano-Al2O3 and Nano-SiO2 and an additive are added, and the final nanoparticle modified polyurethane-epoxy resin composite grouting material is obtained after curing. The polyurethane and the epoxy resin used in the application can effectively form an interpenetrating polymer network (IPN), and the added Nano-Al2O3 and Nano-SiO2 can be uniformly dispersed in the network structure, so that the comprehensive performance of the material is greatly improved, and the application field is very wide. Moreover, the polyurethane and the epoxy resin used in the application are water-based, and the volatile organic compounds are few, so the application is very friendly to the environment.

The application discloses a kind of agricultural hydrogel preparation method and application.The preparation method of agricultural hydrogel CPAUH provided in the application comprises the following steps: acrylamide and potassium acrylate are dissolved in water, then functional components and carboxylated cellulose nanofiber are added, and then crosslinking agent, initiator and catalyst are added, and the composite hydrogel with interpenetrating polymer network is formed by stirring under normal temperature and pressure.The preparation strategy provided in the application not only includes the advantages of mild synthesis conditions and energy saving of normal temperature hydrogel, but also has the advantages of systematicity of material design, accuracy of function integration and practicability for practical application.The obtained agricultural hydrogel has multiple functions of improving nutrient utilization efficiency, water retention and saline-alkali resistance, which provides a feasible strategy for relieving drought and abiotic stress and promoting efficient and sustainable agricultural practice.

This invention relates to the field of cementing technology in oil extraction, and discloses a CO2 / natural gas responsive controllable plugging time composition and its preparation method, comprising: adding modified gel powder to styrene-butadiene latex, and using hydrophobic association in an environment of 50°C to 60°C to adsorb and coat the gel powder onto the outside of the latex particles; heating the system to 75°C to 90°C to decompose the initiator and activate the latex surface; adding a mixed monomer solution composed of a hydrogen ion concentration index-sensitive monomer and an adhesive functional monomer to induce the monomer to penetrate into the amorphous region at a depth of 10nm to 30nm on the latex surface to initiate in-situ polymerization, thereby constructing a semi-interpenetrating polymer network interspersed in the latex network. This invention establishes a stress transmission mechanism to convert swelling tension into positive mechanical compressive stress, eliminates the risk of interfacial shearing and peeling, and improves the retention stability of the plugging barrier under dynamic scouring.

This invention relates to the field of special functional coatings, specifically a composite protective coating resistant to high-intensity ultraviolet radiation and large temperature difference cycling, comprising component A and component B. Component A includes the following raw materials: hyperbranched hydroxyl fluorosilicone resin; epoxy-modified organosilicon resin; reactive anti-ultraviolet composite nanoparticles; high-strength fine ceramic microspheres; core-shell structured acrylic elastomer nanoparticles; hydrophobically modified fumed silica; additives; and environmentally friendly mixed solvents. Component B includes the following raw materials in parts by weight: aliphatic isocyanate; and aminosilane coupling agent. Through the compounding design of epoxy-modified organosilicon resin and hyperbranched hydroxyl fluorosilicone resin, combined with a specific aliphatic curing and crosslinking system, a double crosslinking reaction during curing constructs an interpenetrating polymer network of polyurethane and epoxy-siloxane. This network structure significantly improves the interlayer adhesion and resistance to mechanical abrasion from wind and sand.