29results about How to "Improve cohesive strength" patented technology

The invention belongs to the technical field of high polymer materials, and particularly relates to organic silicon modified polyurethane polystyrene foam as well as a preparation method and application thereof. The polystyrene foam comprises a component A and a component B, the component A is prepared from 40 to 60 parts of polyethylene oxide polyol, 25 to 35 parts of cashew nut shell oil polyol, 15 to 25 parts of castor oil modified polyol, 5 to 10 parts of modified resin A, 18 to 22 parts of flame retardant filler, 0.5 to 1.5 parts of foam stabilizer, 0.1 to 0.2 part of catalyst and 0.4 to 0.9 part of pure water; the modified resin A is organic silicon modified resin which contains active amido and has alkoxy at the tail end; and the component B comprises the following components in parts by weight: 75-85 parts of polymerized MDI and 15-25 parts of prepolymer A. According to the invention, an organic silicon chain segment is connected into a polyurethane network in a chemical bond manner, so that high tensile strength and high bonding strength are maintained while the elongation at break is improved, and the technical problem that the performance of the polyurethane polystyrene foam is difficult to consider at the same time is solved.

The present application relates to the technical field of high molecular antifogging coating, and particularly relates to a supermolecular coated shed film antifogging coating solution, a preparation method and application thereof, wherein acrylic acid, acrylamidoalkyl sulfonic acid, hydroxyalkyl acrylate and double-ene crosslinking monomer are used for tetra-copolymerization to construct a supermolecular matrix with carboxyl, sulfonic acid group, hydroxyl side group and crosslinking network, and a spandex antifogging agent is introduced in situ in the matrix, hydrogen bond and hydrophobic association synergistic effect between the side group functional groups and the spandex molecules are used to realize supermolecular coating, and then pH adjustment and functional additive compounding are performed to obtain the coating solution. The present application solves the problems of easy migration and precipitation of the traditional antifogging agent, coating brittleness, short effective period, and the obtained coating has comprehensive performances of long-acting antifogging, high light transmission, strong adhesion, flexible and bending-resistant, water-resistant and aging-resistant, and room temperature rapid curing, and is suitable for antifogging treatment of various agricultural shed films and greenhouse transparent materials.

This invention belongs to the field of industrial UV inkjet printing consumables technology, specifically relating to a UV white inkjet ink, its preparation method, and its application. The UV white inkjet ink contains aliphatic polyurethane acrylate, silane-modified epoxy polyester, reactive diluent monomer, photoinitiator, adhesion promoter, white pigment, and optional additives. The silane-modified epoxy polyester is prepared by the following method: esterification of a diol compound with itaconic acid, followed by a mercapto-olefin click reaction of the resulting unsaturated polyester polyol with mercaptosilane, and then a condensation reaction of the resulting silane-modified polyester polyol with halopropylene oxide to obtain the silane-modified epoxy polyester. The UV white inkjet ink provided by this invention has high adhesion to the substrate and is not easily peeled off after handling friction and outdoor exposure.

The present application relates to the technical field of adhesive tape, in particular to the field of IPC B65H35, further to a high-temperature-resistant cutting adhesive tape and a preparation method thereof.From top to bottom, the high-temperature-resistant cutting adhesive tape comprises a protective layer, an adhesive layer and a substrate layer in sequence.The adhesive of the adhesive layer comprises the following raw materials in parts by mass: 70-90 parts of prepolymer, 20-50 parts of active diluent, 3-10 parts of photoinitiator, 1-4 parts of antioxidant and 3-6 parts of silane coupling agent.The present application selects to introduce bisphenol A epoxy acrylate and phenolic epoxy acrylate, and selects isobornyl acrylate and dipropylene glycol diacrylate to be used as the active diluent together, so that the cross-linking degree of the adhesive system is high, the system has a suitable curing shrinkage, the cohesive strength of the system is large, the high-temperature-resistant cutting adhesive tape has good bonding performance while the high-temperature-resistant performance is improved, and the prepared high-temperature-resistant cutting adhesive tape has excellent bonding performance and high-temperature-resistant performance.

This invention relates to the field of insulating materials for porous copper foil preparation, and particularly to an insulating material for porous copper foil preparation and its preparation method, as well as a method for preparing porous copper foil. The preparation method includes the following steps: perforating a cathode plate to obtain a cathode plate with multiple blind holes; filling the blind holes with an insulating material for porous copper foil preparation, and curing it to obtain a pretreated cathode plate; the raw materials for the insulating material are: resin, reactive diluent, thixotropic agent, leveling agent, polymerization inhibitor, and photoinitiator. The pretreated cathode plate is used as the cathode and placed in an electrolyte for electrodeposition to obtain porous copper foil. When preparing porous copper foil with the insulating material, the filling material in the blind holes can withstand more than 80 electroplating cycles without peeling off, indicating that the insulating material for porous copper foil preparation possesses excellent adhesion and electrolyte environment durability, enabling a single-filled cathode to support stable electrodeposition over an ultra-long period, significantly extending its effective service life.

The invention discloses a papermaking dry strength agent preparation method, which comprises: S1, dissolving chitosan in an acidic aqueous solution to form a chitosan glue solution, and removing oxygen; s2, dropwise adding a high-concentration acrylamide solution, a water-phase monomer mixed solution and an initiator solution for graft copolymerization to obtain a branched prepolymer; s3, a cross-linking agent is added for a cross-linking reaction, and a micro-cross-linked structure is formed; primary amino groups on a chitosan chain are terminated, and branched amphoteric chitosan-polyacrylamide dry strength agent mother liquor is obtained; s4, carrying out composite dispersion on the composite material and a nanocellulose material, and diluting to obtain a diluent; and S5, after a paper machine slushing pump and before a pressurized screen, firstly adding an anionic garbage capturing agent for pre-flocculation, then continuously feeding the diluent, and stirring to obtain the product. According to the papermaking dry strength agent prepared by the preparation method disclosed by the invention, the interface bonding strength of the papermaking dry strength agent to fibers and the adaptability and use efficiency of the papermaking dry strength agent in a complex wet end environment are remarkably improved, and the requirements of the modern papermaking industry on high-performance and high-stability dry strength agents can be met.

The invention relates to the technical field of film materials, in particular to an ultraviolet-proof barrier coating film and a manufacturing method thereof.The ultraviolet-proof barrier coating film comprises a polyethylene glycol terephthalate base material layer, an anchoring layer and an ultraviolet barrier layer, the anchoring layer and the ultraviolet barrier layer are sequentially stacked on the surface of one side of the base material layer, and the anchoring layer is a coating formed by curing a main film forming substrate; the ultraviolet blocking layer is a composite coating containing polyurethane acrylate resin, a photoinitiator, an ultraviolet light absorber, nano zinc oxide and nano montmorillonite. According to the invention, through optimized chemical composition and process parameters, firm interface bonding between layers and a compact network structure are realized, so that a high initial ultraviolet protection coefficient and ultraviolet aging resistance durability are synergistically obtained.

This invention relates to the field of masking adhesive technology, specifically to an anti-residue masking adhesive and its preparation method, solving the problems of insufficient elongation at break, insufficient adhesion, and easy residue formation after curing due to peeling difficulties in existing masking adhesives. The masking adhesive is based on trifluoromethylphenoxyphenyl ether-carbazole polyurethane. The preparation of trifluoromethylphenoxyphenyl ether-carbazole polyurethane involves first synthesizing diaminocarbazole-trifluoromethylphenoxyphenyl ether, which is then reacted with castor oil and isophorone diisocyanate as a chain extender. Castor oil acts as a soft segment, forming a continuous phase that provides deformation capability to the polymer. The conjugated rigid structure of the carbazole group and trifluoromethyl group acts as a hard segment, providing strength and adhesion. The synergistic effect of the hard and soft segments regulates the peel strength, improving the durability and practicality of the product.

The invention relates to the field of anticorrosive paint, in particular to hyperbranched epoxy resin anticorrosive paint and a preparation method thereof. The coating is a two-component system, wherein a component A comprises an epoxy resin main body, 5-20 parts of a hydroxyl-terminated hyperbranched polyester modifier, a flaky filler, an anti-rust pigment, a reactive diluent and an auxiliary agent; the algebra of the hyperbranched polyester is G2-G4, and the hyperbranched polyester is prepared by melt polycondensation of trimethylolpropane and 2, 2-dimethylolpropionic acid; and the component B is a polyamide curing agent. The preparation method comprises the following steps: synthesizing hyperbranched polyester; pre-mixing the component A with epoxy resin, grinding and dispersing with filler and auxiliaries, and mixing paint to obtain a component A; mixing a curing agent with a coupling agent to obtain a component B; by utilizing the unique structure of the hyperbranched polyester, the epoxy coating is obviously toughened on the premise of not losing the hardness, the viscosity of the system is reduced, the constructability and the filler dispersity are improved, and finally the high-performance coating with impact resistance, strong adhesion and long-acting corrosion resistance is obtained.

This invention discloses a hot melt adhesive for high-temperature protective clothing and its preparation method, comprising the following raw materials: Fischer-Tropsch wax, styrene-isoprene-styrene block copolymer with 0% diblock content, styrene-isoprene-styrene block copolymer with 20-30% diblock content, styrene-isoprene-styrene block copolymer with 40-50% diblock content, rosin resin, petroleum resin, ethylene-vinyl acetate copolymer, and antioxidant. This hot melt adhesive requires no toxic solvents, possesses both heat resistance and water resistance, and is suitable for high-temperature protective clothing. The preparation method of this hot melt adhesive involves heating and mixing polymer materials without adding any solvents or toxic substances during the preparation process, reducing the risk of toluene poisoning, completely solving the problems of solvent evaporation and recovery, and, more importantly, eliminating safety hazards in the storage and use of organic chemicals, achieving environmentally friendly, safe, and efficient production.

The present application relates to the technical field of pressure sensitive adhesive, in particular to a plastic film type low VOC environment-friendly pressure sensitive adhesive product.The plastic film type low VOC environment-friendly pressure sensitive adhesive product is composed of the following raw materials: methyl methacrylate, butyl acrylate, diacetone acrylamide, 2-ethylhexyl acrylate, vinyl trimethoxysilane, hydroxyethyl acrylate, reactive emulsifier, anionic emulsifier, non-ionic emulsifier, ammonium persulfate, sodium bisulfite, adipic acid dihydrazide, sodium bicarbonate, nano calcium carbonate, deionized water and pH regulator.The plastic film type low VOC environment-friendly pressure sensitive adhesive product has excellent holding power, peeling strength, durability and environmental protection.

The present application relates to a kind of acrylic polymer emulsion, its raw material composition and its preparation method and application, belong to building coating technical field.It includes the following weight parts of raw materials: pre-emulsion I 15-25 parts, pre-emulsion II 45-55 parts, emulsifier solution 10-20 parts, initiator solution 1-10 parts, post-processing solution I 1-5 parts, post-processing solution II 1-5 parts, adipohydrazide 0.5-2 parts, triethanolamine 1-5 parts.The acrylic polymer emulsion prepared in the present application has strong cohesion, elongation and elasticity, the soft porcelain prepared using the emulsion is not easy to break or remain when demolding after curing, thereby effectively solving the adhesion problem of soft porcelain on silica gel mold, and the acrylic polymer emulsion prepared in the present application itself has low odor, significantly reduces the peculiar smell of soft porcelain finished product, improves environmental protection and use experience.

This application relates to a low-temperature resistant and creep-resistant hot-melt pressure-sensitive adhesive and its preparation method, belonging to the field of label adhesive technology. The raw materials for preparation include the following components in parts by weight: 35-45 parts of modified styrene-isoprene-styrene block copolymer, 10-15 parts of ethylene-vinyl acetate copolymer, 20-40 parts of hydrogenated petroleum resin, 15-30 parts of terpene resin, 8-18 parts of naphthenic oil, 0.5-1.5 parts of antioxidant, and 4-8 parts of polyisobutylene. This application introduces trifluoromethyl and epoxy groups simultaneously into the styrene-isoprene-styrene molecular chain through free radical grafting. The former imparts low surface energy to the adhesive layer, ensuring rapid wetting and initial tack at -20°C; the latter constructs a chemical network through latent ring-opening crosslinking, synergistically enhancing the physical entanglement of polyisobutylene, achieving simultaneous improvement in low-temperature rapid adhesion and high-temperature creep resistance, suitable for harsh environments such as cold chain labels.

The present application relates to the technical field of pressure sensitive adhesive, and particularly relates to a modified acrylate pressure sensitive adhesive composition, a pressure sensitive adhesive and a preparation method thereof, and the modified acrylate pressure sensitive adhesive composition comprises the following components in parts by mass of raw materials: soft monomer 200-600 parts, hard monomer 10-50 parts, functional monomer 10-25 parts, chain transfer agent 0.05-1 part, solvent 450-600 parts, initiator 0.1-6 parts and tackifying resin 50-150 parts, and the types of raw materials of the components are specially limited. The modified acrylate pressure sensitive adhesive composition provided by the present application can ensure excellent initial adhesion, holding adhesion and peeling performance, significantly reduce the content of volatile organic compounds, improve high-temperature resistance, and is particularly suitable for application scenarios such as automotive interiors which have strict requirements on environmental protection and reliability.

The invention provides a high-adhesion water-based resin coating material suitable for decorative paper as well as a preparation method and application of the high-adhesion water-based resin coating material, and belongs to the technical field of resin materials. Comprising the following raw materials: 20-80 parts of water-based resin, 1-10 parts of an organic filler, 0.5-5 parts of a cross-linking agent, 0.1-1 part of a leveling agent, 0.1-3 parts of a wetting dispersant, 0.1-1 part of a defoaming agent, 1-20 parts of a pigment, 1-10 parts of an auxiliary agent and 10-60 parts of water. Wherein the water-based resin is prepared from water-based acrylic acid modified epoxy ester and a water-based polyurethane dispersion; the cross-linking agent is a water-based blocked isocyanate cross-linking agent. By optimizing the raw material formula, the prepared coating material can better meet the requirements of gravure printing of decorative paper, and has the advantages of being environmentally friendly, high in adhesive force, high in stability and the like.

The invention discloses a preparation method and application of a composite paper surface reinforcing agent. The surface reinforcing agent comprises a cross-linked amphoteric polyacrylamide emulsion and an alkyl ketene dimer (AKD) emulsion. The cross-linking type amphoteric polyacrylamide emulsion is a cross-linking type polyacrylamide emulsion with an interpenetrating network structure, which is prepared by taking a polyvinylamine-co-sodium acrylate amphoteric polymer as a polymer emulsifier through soap-free polymerization. The preparation method comprises the following steps: firstly, taking N-vinylformamide and acrylic acid as raw materials, carrying out water solution free radical polymerization to obtain a poly (N-vinylformamide-co-acrylic acid) copolymer, and then carrying out alkaline hydrolysis to obtain a polyvinylamine-co-sodium acrylate amphoteric polymer; and performing soap-free emulsion polymerization on the amphoteric polymer serving as an emulsifier, an acrylamide monomer, a crosslinking monomer and the like to obtain the crosslinking amphoteric polyacrylamide emulsion. The surface reinforcing agent is compounded with AKD emulsion for use, the ring crush compression resistance, folding strength, bursting strength, tensile strength and surface strength of paper can be remarkably improved, and meanwhile, the surface reinforcing agent has good water resistance and moisture regain resistance and is environmentally friendly and non-toxic.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

The invention relates to the field of high polymer materials, in particular to acrylic air foam with high buffering performance and water resistance and a preparation method of the acrylic air foam, and the acrylic air foam is prepared from the following raw materials in parts by weight: 100 parts of acrylate copolymer prepolymer; 0.5 to 2 parts of a cross-linking agent; 0.5 to 3 parts of a foam structure stabilizer; 2-8 parts of a chemical foaming agent; 0.1 to 1 part of a photoinitiator; wherein the acrylate copolymer prepolymer is a sizing agent with certain viscosity formed by prepolymerizing various acrylate monomers under the action of the photoinitiator, the 24-hour water absorption rate of the foam can be lower than 0.5%, the static water contact angle is larger than 110 degrees, and the foam is far superior to traditional acrylic foam; and the long-term waterproof reliability in a harsh environment is ensured.

The invention belongs to the technical field of high polymer materials, and particularly relates to a polyvinylidene fluoride copolymer for coating a lithium battery diaphragm as well as a preparation method and application thereof, the polyvinylidene fluoride copolymer is formed by copolymerizing a first monomer, a second monomer and a crosslinking monomer, and has a three-dimensional network structure; by taking 100 parts by mass as the total mass, the mass dosage of the second monomer is 1-20 parts by mass, the mass dosage of the cross-linking monomer is 0-2 parts by mass but not 0 part by mass, and the balance is the first monomer; the first monomer is a vinylidene fluoride monomer; the structural formula of the crosslinking monomer is shown in the specification, and in the formula, n is a positive integer between 2 and 12. Compared with the prior art, the problems that in the prior art, the energy density is difficult to increase due to insufficient bonding force of the PVDF diaphragm, and the stability is poor due to high swelling rate are solved. According to the scheme, a cross-linked three-dimensional network structure is formed among PVDF chain segments through a plurality of double bonds of the cross-linked monomer, so that the purposes of reducing the swelling ratio of PVDF and improving the adhesive strength are achieved.

The invention belongs to the field of adhesives, and provides PMMA (polymethyl methacrylate) glue with viscosity regulated and controlled by glacial acetic acid and a preparation method of the PMMA glue. According to the invention, a dual design of synergistic viscosity reduction of a PMMA matrix and free glacial acetic acid and slow release regulation and control of the PMMA-coated glacial acetic acid microcapsule is adopted, accurate regulation and control of the viscosity in a range of 500-50000 mPa.s are realized by controlling the dosage of glacial acetic acid in a range of 2-15 parts by mass, and meanwhile, the microcapsule component gradually releases glacial acetic acid in a glue drying process, so that the viscosity of the microcapsule is reduced, and the viscosity of the microcapsule is reduced. The viscosity rise caused by solvent volatilization is compensated, low viscosity, easy construction and high cohesion strength after drying are guaranteed, the problems that the construction performance and curing strength of traditional PMMA glue are difficult to balance, a high-solid-content system is difficult to defoam, and the storage viscosity stability is poor are solved, and the PMMA glue has wide industrial application value.

The application discloses a stress luminescence type chemical anchoring fog seal layer material with blackening and wear resistance functions and a construction method thereof, and relates to the technical field of pavement engineering pre-maintenance. The fog seal layer material is prepared from near-neutral non-ionic emulsified asphalt as a stable reaction matrix, high-carbon black content activated latex slurry is introduced to realize blackening and network enhancement of the asphalt pavement, the interface bonding and mechanical-optical response triggered by traffic load are realized through core-shell structure stress luminescence particles, and the interface chemical anchoring reaction is triggered when the demulsification of the interface catalytic anti-skid aggregate. The components play a synergistic effect in the storage, construction and service stages, and finally form a reinforced seal layer with stress luminescence visual guidance, high blackness, high anti-skid and long-term durability functions on the pavement, and the application is especially suitable for improving the road traffic safety in dark environments such as tunnels and road sections without street lamps.

The invention relates to the technical field of adhesive synthesis, in particular to a solvent-free closed type polyurethane adhesive and a preparation method thereof.According to the polyurethane adhesive, the weight ratio of a main agent to a curing agent is 100: (15-20); wherein the main agent comprises polyether polyol, isocyanate, a catalyst, a sealing agent, epoxy resin and an active diluent, NCO in polyurethane is sealed by selecting the specific sealing agent to form sealed polyurethane, the sealed polyurethane is insensitive to atmospheric humidity, so that the sealed polyurethane has excellent room-temperature storage performance, meanwhile, the adhesive does not contain an organic solvent, zero pollution is solved, and the adhesive is suitable for large-scale production. The problem of zero emission is solved; according to the preparation method provided by the invention, firstly, a certain content of NCO terminated prepolymer is synthesized, then a proper proportion of sealing agent is selected, NCO is subjected to sealing treatment, a proper proportion of epoxy resin and reactive diluent are added, the viscosity of the product is adjusted, the product is matched with the amine curing agent, and curing molding is performed, so that the synthesis process is simple, the operation is simple and convenient, and the prepared adhesive is stable in performance.

This invention discloses a low-temperature instant crosslinking rubber-type cold-resistant polyethylene protective film and its preparation method, belonging to the field of protective film technology. The protective film is prepared by coating a polyethylene base film with a two-component rubber pressure-sensitive adhesive and then crosslinking it at low temperature. Component A is a ternary compound rubber phase, and component B is an aliphatic triisocyanate crosslinking phase, combined with synergistic additives to achieve rapid low-temperature catalytic crosslinking. The preparation process employs a two-component synchronous delivery, static mixing, slot coating, and low-temperature curing at 70-90℃, completing crosslinking in 3-5 minutes, significantly reducing energy consumption. The resulting protective film exhibits excellent initial tack and holding power, shows no brittleness or residue at -30℃, has a gel content of over 91%, and demonstrates excellent low-temperature protective performance. This invention's process is safe, efficient, and suitable for industrial production, meeting the requirements for product surface protection in low-temperature environments.

The present application relates to the technical field of protective film, and particularly relates to an adhesive resin composition, a surface protective film and application thereof, the adhesive resin composition comprises a crosslinked network phase formed by a polymer, a tackifying wetting phase formed by a fully hydrogenated petroleum resin, and a nano-protrusion phase with a lateral size of 50nm-200nm formed at crosslinking points of the crosslinked network phase; the polymer is a hydrogenated block copolymer with physical crosslinking capability. The adhesive resin composition provided by the present application constructs a three-phase microstructure of "tackifying wetting phase-crosslinked network phase-nano-protrusion phase", and a surface protective film using the adhesive resin composition can autonomously respond to different surface topologies, and realize general protective properties of optical film haze and mirror.

The invention relates to the field of rubber materials, in particular to an integrally-formed self-sealing air-leakage-proof safety tire material and a preparation method thereof. The integrally-formed self-sealing air-leakage-proof safety tire material at least comprises the following raw materials in parts by mass: 80-120 parts of a main body rubber matrix, 13-25 parts of functional resin, 15-30 parts of tackifying resin, 30-45 parts of reinforcing particles, 4-8 parts of an activating agent, 1.5-3 parts of a vulcanizing agent and 0.6-2 parts of an accelerant. The finally prepared self-sealing air-leakage-proof safety tire has better high-temperature stability, bonding strength and environmental adaptability while keeping excellent puncture-proof performance, can keep good performance stability in the long-term application process, prolongs the service life, and meets the performance requirements of long-term high-speed driving of high-end vehicle types.

The invention discloses an integrally recyclable artificial turf and a preparation method thereof, and belongs to the technical field of artificial turfs. The integrally recoverable artificial turf comprises artificial grass and composite base cloth, and the composite base cloth comprises base cloth A for fixing the grass, gridding cloth, base cloth B at the bottom of the turf and polyurethane hot melt adhesive for adhering the base cloth A, the gridding cloth and the base cloth B together; the base cloth A is a PET non-woven fabric subjected to single-side hydrophilic treatment by adopting a hydrophilic finishing agent; the polyurethane hot melt adhesive is prepared by compounding rosin-based polyol, an isocyanate monomer, 1, 4-butanediol and polytetrahydrofuran, and the rosin-based polyol, the isocyanate monomer, the 1, 4-butanediol and the polytetrahydrofuran are compounded to obtain the polyurethane hot melt adhesive. The integrally recyclable artificial turf prepared by the invention is firm in combination and can quickly drain water.

This application discloses a high-barrier aluminized composite film for integrated circuit packaging and its preparation method, belonging to the field of metal coating. The high-barrier aluminized composite film for integrated circuit packaging includes a first aluminized PET layer, a first adhesive layer, a second aluminized PET layer, a second adhesive layer, a BOPA layer, a third adhesive layer, and a PE layer arranged sequentially. The aluminized surfaces of the first and second aluminized PET layers are bonded together by the first adhesive layer, which is formed by curing a polyurethane-acrylate base agent and a curing agent. This application has the advantage of obtaining an aluminized composite film with good oxygen and moisture barrier properties and mechanical properties.

The invention relates to the technical field of extruded sheets, in particular to an XPS extruded sheet long-acting flame-retardant surface modification method which comprises the following steps: S1, mixing an organic copolymer, lignin sulfonate, a silane coupling agent and silicon-titanium-aluminum hybrid sol in a solvent, and curing to obtain flame-retardant coating slurry; and S2, the surface of a pretreated XPS extruded sheet substrate is coated with the flame-retardant coating slurry, curing is conducted through a stepped heating program, and a flame-retardant coating is formed on the surface of the substrate. Rigid monomers such as divinyl benzene in the organic copolymer form a cross-linked structure, hardness and skeleton support are provided for a coating, and the boron element has a flame retardant effect; and an inorganic network structure formed by the silicon-titanium-aluminum hybrid sol can enhance the hardness of the coating, improve the adhesive force, and play the roles of heat insulation and flame retardance at the same time.

This invention provides a PDA / ODT-ODTMS composite coating and its preparation method, relating to the field of metal surface protection technology. The coating comprises, from the inside out, a polydopamine intermediate layer and a co-deposited functional layer of n-octadecyl mercaptan / octadecyltrimethoxysilane. The preparation method involves first electrodepositing a PDA intermediate layer on the substrate surface, then immersing it in an aqueous micelle deposition solution composed of n-octadecyl mercaptan, octadecyltrimethoxysilane, and a surfactant, and forming the composite functional layer through isothermal chemical deposition. This invention, through molecular-level co-deposition of ODT and ODTMS combined with an aqueous micelle process, constructs a firmly adhered, dense, and highly hydrophobic protective barrier on the metal surface, significantly improving the long-term corrosion resistance and stability of the coating, while also making the preparation process safer and more environmentally friendly.