1694 results about "Solvent free" patented technology

The invention relates to the technical field of flexible display devices, in particular to a high-impact-resistance coating for ultra-thin glass, a preparation method and an assembly layer. The invention discloses a high-impact-resistance coating for ultra-thin glass. The high-impact-resistance coating is mainly prepared from a precursor, a cross-linking agent and a photoinitiator in a solvent-free condition in a UV curing manner, the precursor comprises a polyether urethane acrylate oligomer with Tg of-70 DEG C to-40 DEG C; the Tg of the coating is 30-60 DEG C; and in a temperature scanning test with the temperature range of-40 to 80 DEG C and the frequency of 1Hz, the peak value of the loss factor of the coating is 0.7 to 1.2. The high-impact-resistance coating provided by the invention has good adhesion and excellent optical performance, also has good elongation at break and good flexibility, has a high dissipation effect on mechanical stress, and can enhance the impact resistance of the ultra-thin glass. In addition, the high-impact-resistance coating is prepared through a UV photocuring method and does not contain a solvent, the VOC emission in the production and preparation process is low, and the coating is green and efficient.

The invention discloses a super-wear-resistant super-hydrophobic coating in the technical field of coatings, the super-wear-resistant super-hydrophobic coating comprises a primer and a finishing coat, the primer comprises solvent-free aliphatic polyether polyol resin, micro-powder particles, di-tetratoluene diisocynate, fumed silica nanoparticles and a primer magnetic attraction material; the finishing paint comprises hydrophobic nanoparticles, a diluent, a finishing paint magnetic attraction material and a hydrophobic treatment agent, the primer magnetic attraction material is ferrite powder, and the finishing paint magnetic attraction material is nickel powder. The preparation method comprises the following steps: 1, preparing the primer; secondly, primer is sprayed; step 3, roughening the primer; 4, finish paint is manufactured; step 5, spraying finish paint; and step 6, detecting the performance of the coating. The preparation method is scientific and reasonable, the uniformity and stability of the coating in the preparation and coating process are ensured by optimizing the composition of the coating material, improving the preparation process and introducing a magnetic suction device, and therefore the wear resistance, hydrophobicity and adhesive force of the coating are improved.

The invention discloses a novel modified starch-based polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of concrete admixtures. The preparation process comprises the following steps: (1) performing acidolysis treatment on starch to obtain acidolysis starch; (2) modifying the acidolysis starch and a double-bond modifier under the action of auxiliaries such as a polymerization inhibitor to prepare novel double-bond-containing modified starch (AS); (3) mixing AS and a polyether macromonomer in water to form a base solution; (4) dropwise adding an acrylic monomer and a chain transfer agent into the base solution, and carrying out a copolymerization reaction through an initiation system; and (5) insulating and neutralizing to obtain a finished product. In order to solve the problems of non-renewable petroleum-based raw materials, high production cost and the like of the traditional polycarboxylate superplasticizer (PCA), active double bonds are introduced into modified starch by a solvent-free semi-dry process to replace part of polyether macromonomers, so that the polymerization activity and grafting ratio of the modified starch are effectively improved, the water-reducing dispersion effect of the modified starch is enhanced, and the water-reducing property of the modified starch is improved. The water reducer has the advantages of low mixing amount, high water reduction and the like, and has economic and environmental benefits.

The invention discloses a high-stability endotoxin-free PHA nano-emulsion and a preparation method thereof, and belongs to the technical field of biodegradable high polymer material compositions and processing thereof. The nano-emulsion is characterized in that the endotoxin content is not higher than 0.10 EU / g, the median particle size d50 is 100-200 nm, and the PDI is not higher than 0.15, and the nano-emulsion is stable in long-term storage. The preparation method is a continuous solvent-free process and comprises the steps of melt extrusion, high-pressure thermal emulsification and deep endotoxin removal. By adopting the specific pH-insensitive cationic polymer emulsifier and the crystallization inhibitor, the chemical contradiction that an efficient alkaline purification process is incompatible with a nano-emulsion stable system is solved, physical aging is inhibited, and an unexpected technical effect is obtained. The invention also discloses an O / W type cream containing the nano emulsion.

The invention discloses an environment-friendly solvent-free epoxy fireproof coating and a preparation method thereof, and belongs to the technical field of fireproof coatings, the environment-friendly solvent-free epoxy fireproof coating comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 30 to 40 parts of film-forming agent, 3 to 5 parts of reactive diluent, 30 to 70 parts of intumescent flame-retardant system, 12 to 16 parts of fireproof filler, 0.5 to 1.1 parts of anti-settling agent, 0.8 to 3 parts of modified inorganic nano filler and 0.2 to 0.6 part of defoaming agent; the component B comprises the following raw materials in parts by weight: 6-14 parts of a curing agent and 0.6-1.2 parts of a curing agent accelerator. The fireproof coating provided by the invention belongs to an environment-friendly coating, has excellent peel strength, fireproof performance, heat insulation performance and water resistance, is small in dosage, and greatly saves the application cost of the coating.

The invention discloses a method for preparing a single-benzene-ring liquid chemical through solvent-free hydrogenation degradation of polystyrene waste plastics based on a bifunctional catalyst. According to the method, Nb2O5 is taken as a carrier, 1-3wt% of noble metal ruthenium is loaded to prepare a bifunctional catalyst, and high-molecular-weight polystyrene is efficiently degraded into single-benzene-ring liquid chemicals such as benzene, methylbenzene and ethylbenzene through hydrogenation reaction under a solvent-free condition. Precious metal ruthenium hydrogenates a polystyrene long chain to generate a short-chain hydrocarbon intermediate, then a carrier # imgabs0 # acid site drives beta-cracking and hydrogen transfer reaction, and a single-benzene-ring product is directionally generated through the synergistic effect of the short-chain hydrocarbon intermediate and the carrier # imgabs0 # acid site. The method has the advantages of no solvent, reduced equipment cost, high reaction efficiency, simple reaction operation, mild reaction conditions, simple catalyst preparation process, high activity, selectivity and good stability, and is suitable for industrial production, and no other solvents preempt acidic sites. The method not only can realize cyclic utilization of resources, but also can alleviate the current environmental pollution problem.

The invention provides a solvent-free UV dielectric insulation protective coating as well as a preparation method and application thereof. The high-surface-energy and high-glass-transition-temperature UV-curable coating is prepared by combining flexible modified polyurethane acrylate, flexible acrylate, rigid acrylate with high glass transition temperature, a high-functionality acrylate cross-linking agent, methyl methacrylate with high dilutability and high glass transition temperature as well as a plurality of photoinitiators, auxiliaries, pigment and filler powder and the like. The invention relates to a dielectric insulation protective coating with high adhesive force. The prepared coating is a solvent-free 100% solid single component, is complete in mixing and dissolving, convenient to construct, high in light curing energy utilization rate, high in production efficiency and suitable for large-scale automatic large-scale flow line production, and compared with PSA back glue used for a traditional PET blue film, the outer surface of the coating has higher surface energy, and the coating has the advantages of being high in light curing energy utilization rate and high in production efficiency. And the film has considerable dielectric insulation performance and good edge covering protection performance, and meets the development requirements of a higher charging voltage platform of a fast-charging electric vehicle in the future.

The invention relates to the field of PU, and particularly discloses a far infrared magnet therapy PU seat skin and a preparation method thereof.The far infrared magnet therapy PU seat skin sequentially comprises a base cloth layer, a solvent-free bonding layer, a high-solid foaming layer, a polyurethane surface layer and a surface layer from bottom to top; the high-solid foaming layer is prepared from the following components in parts by weight: 70 to 90 parts of high-solid resin, 5 to 8 parts of a cross-linking agent, 0.5 to 1.5 parts of a foaming agent, 0.5 to 1.0 part of a flatting agent, 10 to 15 parts of a flame retardant, 0.05 to 0.2 part of color paste, 10 to 20 parts of far infrared ceramic micro powder and 2 to 8 parts of germanite magnetic powder. The seat skin has a good far infrared ray transmission effect and high strength, and has a good health care effect.

The invention relates to the technical field of secondary ion batteries, in particular to a dry binder and a preparation method thereof as well as an electrode plate and a preparation method thereof. The preparation method of the dry binder comprises the following steps: mixing and granulating a graft polymer and a metal salt to obtain the dry binder, the graft polymer comprises maleic anhydride grafted polypropylene. Maleic anhydride grafted polypropylene is used as a polymer matrix and is blended with the metal salt to prepare the solvent-free dry-method binder through a mixing process, and the solvent-free dry-method binder has excellent binding strength and lithium ion conductivity, and is high in use safety and low in raw material cost.

The invention discloses a preparation method of a pre-fibration polymer solid electrolyte as well as a product and application of the pre-fibration polymer solid electrolyte. The method comprises the following steps: demulsifying and drying polytetrafluoroethylene (PTFE) emulsion to prepare pre-fiberized PTFE dry powder, then mixing sulfide lithium phosphorus sulfur chlorine (Li6PS5Cl) electrolyte and fiberized PTFE in a proper proportion, and directly preparing the sulfide solid electrolyte composite membrane through a room temperature rolling solvent-free dry process. The pre-fiberized solid sulfide electrolyte film avoids high-cost and high-energy-consumption operations such as ball milling, hot pressing and the like, and the preparation energy consumption and the equipment cost are reduced. The material can be effectively applied to the field of preparation of solid-state batteries, and the structure and performance of an electrolyte material are fully reserved. The method is a solid electrolyte film forming technology with an application prospect, and has an important application value for the development of a solid-state battery.

A solvent-free process employs a multifunctional carbon black to prepare compositions and electrodes for lithium-ion batteries. The multifunctional carbon black provides two or more desirable characteristics, acting, for example, as a conductive carbon additive, as a fibrillizing agent and / or as a mechanical reinforcement. In one example, an electroactive material, e.g., graphite or a lithium transition metal compound, a binder and a multifunctional carbon black are combined in one or more steps. High shear mixing is used to process the binder in the presence of the multifunctional carbon black. The resulting composition can be formed into a film which can be applied onto a suitable substrate to produce an electrode.

The invention discloses a high-barrier fast-curing solvent-free polyurethane adhesive and a preparation method thereof, and belongs to the field of preparation of polyurethane adhesives. The adhesive is composed of a component A and a component B, the component A and the component B are used in cooperation according to the functional group molar ratio of-NCO:-OH = 1.1-1.9: 1, and the component A is a modified isocyanate adduct formed by reaction of modified polyester polyol and polyisocyanate; and the component B is a mixture of castor oil derivative polyol, modified polyester polyol and polyether polyol. According to the adhesive, through selection of raw material monomers, design of a molecular chain structure and a specific molecular weight size and regulation and control of a molecular proportion, higher reaction activity and excellent water and oxygen blocking performance are achieved. The high-barrier fast-curing adhesive is excellent in peel strength and can meet the actual application process requirements of the adhesive, so that the high-barrier fast-curing adhesive can be widely applied to the field of composite flexible packaging.

The invention relates to the technical field of modified organic silicon coatings, and discloses an acrylic acid modified organic silicon polymer, a solventless coating and a preparation method thereof.The acrylic acid modified organic silicon polymer is prepared from, by mass, 300 parts of polysiloxane, 100 parts of acrylic acid monomers and 1-2 parts of initiator; the polysiloxane is prepared by mixing alpha, omega-hydroxyl-terminated polymethylsiloxane and alpha, omega-hydroxyl-terminated poly (methyl-methyl vinyl) siloxane according to a mass ratio of (8 to 9): (1 to 2). The coating containing the organic silicon polymer is prepared from the following components in parts by mass: 260 parts of acrylic acid modified organic silicon polymer, 40 to 60 parts of alpha, omega-terminated methoxy polydimethylsiloxane, 5 to 10 parts of fumed silica, 15 to 25 parts of talcum powder, 40 parts of pigment paste, 25 to 30 parts of cross-linking agent, 10 to 20 parts of chain extender, 2.5 to 5 parts of A type coupling agent, 2.5 to 5 parts of B type coupling agent and 0.2 to 0.5 part of catalyst. The coating has the advantages of being environmentally friendly, high in strength, low in viscosity and suitable in surface drying time; the viscosity is below 1200 mpa.s, the tensile property of a corresponding coating is not lower than 3.8 MPa, and the surface drying time is within 45 min.

The invention discloses a polyurethane modified epoxy resin adhesive as well as a preparation method and application thereof, and the polyurethane modified epoxy resin adhesive is prepared from the following components in parts by mass: 7-10 parts of E51 type bisphenol A diglycidyl ether, 3.5 parts of a phenolic aldehyde amine T31 curing agent and 1-3 parts of synthetic polyurethane, the synthetic polyurethane is prepared from polyether triol, polyether amine, isophorone diisocyanate and glycerol carbonate, and a blending system of the synthetic polyurethane and bisphenol A diglycidyl ether is adopted to be subjected to covalent crosslinking with phenolic aldehyde amine T31, so that the adhesive has high toughness and strength guarantee; the synthetic polyurethane prepared by the method is obtained through simple, green and efficient solvent-free synthesis, and the synthesized product has certain fluidity at room temperature, so that the subsequent stirring preparation process of an adhesive is facilitated. And a solvent-free synthesis method is adopted, so that the use of a toxic organic solvent in the traditional polyurethane synthesis process is avoided, and the synthesis process is greener.

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

The invention belongs to the technical field of coatings, and particularly relates to an epoxy heavy-duty coating as well as a preparation method and application thereof. The coating comprises a component A and a component B, the component A comprises epoxy resin, a reactive diluent, a reactive flexibilizer and an auxiliary agent; the component B comprises epoxidized soybean oil, alicyclic amine and organic phenol; the reactive flexibilizer contains an epoxy group. The epoxy curing agent with good flexibility and corrosion resistance can be obtained by carrying out graft modification on alicyclic amine by adopting the epoxidized soybean oil, and then the epoxy curing agent reacts with the epoxy resin and the reactive toughening agent at the same time for curing, so that the epoxy coating is modified by the epoxidized soybean oil. And the reaction type flexibilizer and the epoxidized soybean oil with the flexible long chain participate in the reaction, so that the flexibility of the coating is improved while the chemical resistance and the mechanical property of the coating are not reduced, the brittle failure of the coating in the use process is better avoided, and the anti-corrosion life of the coating is prolonged.

The invention provides a preparation method of solvent-free lignin modified waterborne polyurethane, which comprises the following steps: mixing isocyanate, polyol and lignosulfonate alcohol liquefied product, and reacting to obtain a prepolymer; and dispersing the prepolymer in water, and carrying out a post-chain extension reaction with a post-chain extender to obtain the solvent-free lignin modified waterborne polyurethane. The lignosulfonate alcohol liquefied product has high compatibility with polyhydric alcohols and isocyanate, so that the lignosulfonate alcohol liquefied product directly participates in a polymerization reaction without using a solvent to dissolve lignin in the later period, thereby improving the environmental protection property and reducing the cost. The degree of functionality of a lignin reactive group in the lignosulfonate alcohol liquefied product is greater than 2, and a waterborne polyurethane product is of a cross-linked structure after reaction, so that the mechanical properties and the like of the product are greatly improved, and the application in the fields of leather finishing and the like is further facilitated.

This packaging material has a structure in which a transparent vapor-deposited barrier film, a stretched nylon film, and an unstretched polypropylene film are laminated in this order. The transparent vapor-deposited barrier film and the stretched nylon film are laminated with an adhesive layer formed of a cured product of a solventless adhesive agent therebetween. The ratio of the Young's modulus in the MD direction of the unstretched polypropylene film with respect to the thickness of the unstretched polypropylene film is 9.0 MPa / μm or more.

The invention discloses a preparation method of water-based solvent-free polyurethane synthetic leather, and belongs to the technical field of polyurethane synthetic leather, and the preparation method comprises the following steps: S1, coating the surface of a release surface of release paper with surface layer slurry, after the surface layer slurry stands until the surface is flat, covering the surface of the surface layer slurry with a toughening net layer, heating and drying the surface layer slurry to obtain a synthetic leather surface layer, and embedding and fixing the toughening net layer on the surface of the synthetic leather surface layer; s2, the face, inlaid with the toughening net layer, of the synthetic leather surface layer is coated with foaming slurry, and the foaming slurry is heated to be foamed to form a foaming core layer; s3, base cloth is bonded to the surface of the foaming core layer and then dried, the release paper is stripped after drying, and the polyurethane synthetic leather composed of the synthetic leather surface layer, the toughening net layer, the foaming core layer and the base cloth is obtained; according to the polyurethane synthetic leather disclosed by the invention, the comfort in the use process is improved through thermal management and good internal softness and elasticity.

The invention discloses a flame-retardant polyurethane hot melt adhesive and a preparation method thereof, and belongs to the technical field of hot melt adhesives. Comprising the following raw materials in parts by weight: 30-50 parts of polybutylene adipate glycol, 35-55 parts of polypropylene oxide glycol, 25-50 parts of MDI, 6-18 parts of modified dihydric alcohol, 0.1-0.3 part of a catalyst, 3-5 parts of a lubricant and 3-7 parts of an antioxidant. The polyurethane hot melt adhesive is prepared by a two-step method, no solvent is added, and the method is environment-friendly; mDI is selected as isocyanate, so that the hot melt adhesive is endowed with excellent stability and mechanical properties; wherein various groups in modified dihydric alcohol molecules can achieve a synergistic effect, so that the flame retardance, the heat resistance and a certain degree of mechanical properties of the hot melt adhesive are remarkably enhanced, and the hot melt adhesive is stable in performance and not easy to fall off; therefore, the prepared hot melt adhesive is excellent in mechanical property, has stable and efficient flame retardance and heat resistance, is environmentally friendly, and has important application value in the technical field of hot melt adhesives.

The invention discloses a solvent-free dealcoholization type anti-pollution flashover coating containing a hyperbranched cross-linking agent and a preparation method of the solvent-free dealcoholization type anti-pollution flashover coating, and belongs to the technical field of coatings. The solvent-free dealcoholization type anti-pollution flashover coating is prepared from the following components in parts by mass: 80 to 100 parts of alkoxy silicone oil, 40 to 75 parts of filler, 3 to 7 parts of hyperbranched cross-linking agent, 0.2 to 0.5 part of catalyst, 1 to 3 parts of curing accelerator, 0.5 to 3 parts of coupling agent and 60 to 100 parts of structure control agent, wherein the hyperbranched cross-linking agent is prepared from vinyl trimethoxy silane and trimethoxy hydrogen silane through a cross-linking reaction under the action of an oxidizing agent and a platinum catalyst. The self-made hyperbranched cross-linking agent is added into the solvent-free dealcoholization type anti-pollution flashover coating, so that the mechanical property of the coating can be effectively improved, and the coating has excellent electrical property, meets the requirements of spraying construction and meets the comprehensive performance requirements of the anti-pollution flashover coating.

The invention belongs to the technical field of adhesives, and particularly relates to a polyurethane super-strong adhesive as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing branched-chain multi-mercapto mercaptan with an epoxy compound, adding a catalyst for reaction, and then adding a neutralizer for terminating the reaction to prepare an epoxy prepolymer; the preparation method comprises the following steps: mixing an epoxy prepolymer with branched chain multi-mercapto mercaptan to prepare a mixture; and mixing the mixture with isocyanate, reacting to obtain a product, and defoaming the product to obtain the polyurethane super-strong adhesive. The sulfur element is introduced into a polymer molecular chain, so that the bonding performance between the base cloth (base cloth) and the coating is remarkably improved, meanwhile, the water resistance, solvent resistance and low temperature resistance are also greatly improved, the method is suitable for humid, low-temperature and organic solvent environments, no solvent participates in the preparation process, and the environment-friendly requirement is met.

The invention relates to the technical field of environment-friendly high polymer materials, in particular to an environment-friendly furniture protective film and a preparation method thereof. The technical problems that a traditional furniture protection film is insufficient in toughness and short in service life are solved. According to the protective film disclosed by the invention, a polylactic acid, polyhydroxyalkanoate and dimer fatty acid ester flexibilizer blending material is taken as a matrix, a cyanoethylation lignin-cellulose nanocrystal compound reinforcing agent is added to form a dense nano network, and a dynamic cross-linking agent containing disulfide bonds and a functional auxiliary agent are introduced. According to the invention, a solvent-free ultraviolet light / damp and hot dual-curing system is adopted for coating and curing to prepare the coating. The furniture protection film is excellent in mechanical property, toughness is remarkably improved, and the furniture protection film has multiple functions such as high barrier property and the like and has the self-repairing capacity and the full-life-cycle environment-friendly characteristic.

The present application discloses a one-component solvent-free epoxy-modified polyurethane waterproof coating, its preparation method and a waterproof product. The coating comprises the following raw material components in parts by weight: polyether diol, 100 parts by weight; polyether triol, 30 - 80 parts by weight; epoxy vegetable oil plasticizer, 80 - 120 parts by weight; pigments and fillers, 200 - 350 parts by weight; diisocyanate, 14 - 20 parts by weight; modified epoxy resin A, including a terminal epoxy group and an epoxyalkyl acrylate monomer-derived chain segment, 9 - 17 parts by weight; hydroxyoxazoline, 2 - 11 parts by weight, and the hydroxyoxazoline is an oxazoline compound containing one active hydroxyl group; active diluent, 70 - 100 parts by weight; defoamer, 1 - 3 parts by weight; dispersant, 0.1 - 0.5 parts by weight; latent curing agent, 12 - 41 parts by weight; catalyst, 0.4 - 1.8 parts by weight. The above coating can effectively improve the problem of poor adhesion strength retention rate of traditional polyurethane waterproof coatings after being soaked in water, and the product has excellent performance.

The invention relates to the field of extraction of sacha inchi oil, in particular to a preparation method and application of sacha inchi oil, and aims to solve the problems of large loss of heat-sensitive components, solvent residue and low oil yield in the traditional process. The ratio of cellulase to pectinase to xylanase to lipase is 3: 2: 1: 0.5, and carrying out enzymolysis for 2-3 hours at the pH value of 4.5-5.5 and the temperature of 45-50 DEG C; the obtained enzymolysis product is subjected to 28-40kHz ultrasonic treatment for 20-30 minutes, and then is subjected to two-stage gradient squeezing (pre-squeezing at 50-55 DEG C to final squeezing at 35-40 DEG C) in combination with 0.1 mu m ceramic membrane filtration, so that efficient oil extraction and active ingredient protection are realized. The oil yield of the sacha inchi oil is increased to 50.0%, the content of alpha-linolenic acid is larger than or equal to 42%, the content of vitamin E reaches 158 mg / 100 g, no solvent is left, and the sacha inchi oil is suitable for the fields of functional food and cosmetics.

The invention discloses a dual-curing solvent-free high-temperature-resistant epoxy resin structural adhesive as well as a preparation method and application thereof. The structural adhesive comprises the following components in percentage by weight: 1.5-5% of a latent curing agent, 2-5% of a high-heat-resistant curing agent, 1-5% of nano filler, 0.1-0.3% of a curing accelerator and the balance of epoxy resin. By accurately screening epoxy resin monomers, optimizing a dual curing agent system and introducing the high-temperature-resistant nanofiller, room-temperature stability, medium-temperature rapid curing and gelling and high-temperature complete curing are realized, and the final heat-resistant temperature is greater than or equal to 300 DEG C. Through the synergistic effect of the epoxy resin, the medium-temperature curing agent and the high-temperature curing agent, the crosslinking stability at different temperature stages is ensured. In addition, through introduction of the inorganic nano filler, the high-temperature mechanical property and the heat-resistant stability of the material are further improved. The preparation method does not need to use a solvent, and the prepared epoxy resin structural adhesive has excellent heat resistance and mechanical strength and is suitable for the fields of high-temperature structural adhesives, aerospace composite materials, high-temperature-resistant coatings and the like.

The invention provides a method for preparing diglyceride oil by a solventless enzymatic method, which comprises the following steps: S1, mixing saturated fatty acid A and saturated fatty acid B to prepare a liquid eutectic mixture; s2, mixing the eutectic mixture, glycerol and lipase in a reaction system, and carrying out esterification reaction to obtain diglyceride; s3, separating the prepared diglyceride, adding the saturated fatty acid A and / or the saturated fatty acid B into the reaction system again to form a liquid eutectic mixture again, and repeating the step 2; wherein in the step S1, the saturated fatty acid A and the saturated fatty acid B are selected from C10-C20 alkanoic acid, in the step S2, the mass ratio of the eutectic mixture to the glycerol is 1: (1-5), and the temperature of the esterification reaction is 35-78 DEG C. The method solves the problem that the high-melting-point saturated fatty acid is difficult to utilize in the existing technology for preparing the diglyceride oil by the solvent-free enzymatic method.

The invention belongs to the technical field of coatings, and provides an environment-friendly solvent-free coating composition for a metal surface and a preparation method of the environment-friendly solvent-free coating composition. According to the coating composition, through the synergistic effect of the fluorine-containing polymer, the fluorinated polyester and the modified polyurethane, the corrosion resistance and the environmental stability of a coating are improved. Firstly, perfluoromethyl vinyl ether and triethanolamine react under the action of a catalyst to prepare a fluorine-containing polymer, and a three-dimensional cross-linked network structure of the fluorine-containing polymer endows a coating with hydrophobicity and chemical inertness; secondly, fluorinated polyester is prepared through free radical polymerization, and the surface energy is reduced through a perfluorinated chain segment; finally, modified polyurethane is prepared through polycaprolactone glycol, single-terminal dihydroxyl polydimethylsiloxane and the like, the surface energy is reduced through a silicon-oxygen chain segment of the modified polyurethane, and the oxidation resistance is improved through a thioether bond. The coating composition shows excellent water resistance, oxidation resistance and chemical corrosion resistance, has excellent mechanical property and adhesive force, and is suitable for protecting a metal substrate in a severe environment for a long time.

The invention provides a cross-linking and curing environment-friendly polyurethane waterproof coating and a preparation method thereof, and the cross-linking and curing environment-friendly polyurethane waterproof coating comprises the following raw materials by weight: 15-30 parts of a polyhydroxy compound; 6 to 15 parts of pentaerythritol polyether; 1-5 parts of an anionic surfactant; 1 to 5 parts of nano silicon dioxide aerogel; 1-8 parts of wollastonite powder; 25 to 45 parts of fly ash floating beads; 10 to 25 parts of diisocyanate; 0.5 to 3 parts of chlorinated paraffin; and 0.5 to 3 parts of N, N-dimethyl-2-hydroxyethylamine. The cross-linking curing environment-friendly polyurethane waterproof coating provided by the invention solves the environment-friendly problem of the traditional polyurethane waterproof coating, realizes solvent-free curing, meets the environment-friendly requirement, improves the comprehensive properties such as elasticity and durability of a coating film, and provides a safer and more effective solution for waterproof construction.

The invention relates to a 250 DEG C resistant organosilicon modified solvent-free epoxy anticorrosive paint, which comprises a component A and a component B. The mass ratio of the component A to the component B is 100: (44.4-55.5). The component A is prepared from the following components in parts by weight: 40 to 50 parts of hyperbranched modified epoxy resin, 0 to 20 parts of glass flake, 0 to 20 parts of mica powder, 0 to 20 parts of talcum powder, 0 to 20 parts of calcium sulfate whisker, 5 to 10 parts of pigment, 0.5 to 1.5 parts of organic bentonite, 0.5 to 1.5 parts of silane coupling agent, 0.1 to 0.5 part of dispersing agent, 0.1 to 0.5 part of defoaming agent and 0.1 to 0.5 part of flatting agent; the component B is a mixture of a modified epoxy curing agent and an organic silicon modified amine curing agent; the hyperbranched modified epoxy resin is used as a main film-forming substance and is matched with the modified epoxy curing agent and the organic silicon modified amine curing agent, so that a coating can resist the high temperature of 250 DEG C for a long time and has excellent flexibility, adhesive force and corrosion resistance, and the coating is extremely low in volatile organic matter content and very green and environment-friendly.