965 results about "Fluorine free" patented technology

The invention relates to a deicing super-hydrophobic coating based on MXene, a coating, a preparation method and application of the coating. The coating comprises the following components in percentage by mass: 2%-5% of a super-hydrophobic modified MXene photo-thermal material, 2%-5% of epoxy resin, 0.5%-1.5% of an epoxy resin curing agent, 0.5%-1.5% of PDMS, 0.05%-0.15% of a PDMS curing agent and 80%-90% of a diluent. Wherein the super-hydrophobic modified MXene photo-thermal material is MXene powder treated by fluorine-free long-chain silane, and the super-hydrophobic modified MXene photo-thermal material is a super-hydrophobic modified MXene photo-thermal material. MXene with excellent photo-thermal conversion performance is used as a photo-thermal material, fluorine-free long-chain silane is used for performing low-surface-energy hydrophobic modification on the MXene material, environmental pollution caused by perfluorinated or polyfluorinated organic compounds is avoided, photo-thermal performance and super-hydrophobic performance are integrated, the advantages of a super-hydrophobic coating and a photo-thermal coating are integrated, and the application prospect is wide. The deicing super-hydrophobic coating based on MXene can be used for passive ice prevention and active photo-thermal deicing.

The invention discloses early-strength, low-resilience and high-durability sprayed concrete and a preparation method thereof. The sprayed concrete is prepared from the following components: cement, an early-strength hardening auxiliary cementing material, coarse aggregate, fine aggregate, water, an additive, a fluoride-free alkali-free high-concentration accelerator, a rheology modifier, fibers and the like. The preparation method of the sprayed concrete mainly comprises two aspects. The method comprises the following steps: (1) proportioning optimization; and (2) functional materials are applied. By optimizing the glue material amount, the water-glue ratio and the sand ratio and adopting the small-particle-size coarse aggregate, the concrete has good workability and homogeneity, the risk of pipe blocking in the pumping and spraying process is reduced, aggregate rebound in the jet flow process is reduced, and the spraying operation effect is optimized. By applying the high-concentration fluoride-free alkali-free accelerator and the early-strength hardening auxiliary cementing material, the early strength of the concrete can be effectively improved, the volume deformation is reduced, and the long-term mechanical property and durability are improved. The fiber and the rheological modifier are added, so that the rheological property of the sprayed concrete can be further effectively improved, and the rebound rate is reduced. Rapid setting of the sprayed concrete and cooperative improvement of mechanical properties and long-term performance are achieved by optimizing the mixing ratio and applying novel functional materials.

The invention discloses a fluoride-free environment-friendly flame-retardant PC (polycarbonate) material and a preparation method thereof. The fluoride-free environment-friendly flame-retardant PC material is prepared from the following raw materials in parts by weight: 68-99.98% of polycarbonate resin; 0.01 to 25% of a flame retardant; 0.01 to 5% of a synergistic flame retardant; and 0-2% of a processing aid. The flame retardant does not contain any flame retardant, does not generate toxic gas or smoke in the combustion process and is harmless to the environment and human bodies, the components of the flame-retardant PC material meet the PFAS environment-friendly requirement, the flame-retardant PC material belongs to an environment-friendly material, and the prepared fluoride-free environment-friendly flame-retardant PC material is applied to the fields of the automobile industry, the electric appliance and instrument industry, the mechanical industry and the like.

The invention relates to a fluoride-free polyimide-based film and a preparation method thereof. The method comprises the following steps: S1, preparing a polyamide acid solution; s2, fluorine-free organic silicon serving as a modifier is added into the polyamide acid solution and dispersed, a blended spinning solution is formed, and the solubility parameter difference value of the fluorine-free organic silicon and polyamide acid is 2.0 (MPa) 1 / 2 or below; s3, carrying out electrostatic spinning on the blended spinning solution to form a polyamide acid-based nanofiber layer; and S4, carrying out thermal imidization on the polyamide acid-based nanofiber layer to obtain the fluoride-free polyimide-based film. The film has a structure formed by three-dimensional cross-linking and winding of polyimide-based nanofibers, and the polyimide-based nanofibers are composed of a polyimide base material and fluorine-free organic silicon dispersed in the polyimide base material. The method does not involve fluorine-containing raw materials, and is environment-friendly and high in process compatibility. The film provided by the invention has excellent waterproofness, air permeability and mechanical properties at the same time.

The invention discloses an environment-friendly electrolyte for anodic oxidation of titanium and titanium alloy workpieces and an electrolytic coloring method. The electrolyte comprises 8-12 parts of lactic acid, 5-10 parts of sodium tartrate, 2-5 parts of sodium bicarbonate and the balance of deionized water. The electrolytic coloring method comprises the steps of pretreatment, anodic oxidation coloring and aftertreatment. The pretreatment comprises alkali washing oil removal, water washing and laser treatment; and an electrolyte mixed by 8-12 parts of lactic acid, 5-10 parts of sodium tartrate, 2-5 parts of sodium bicarbonate and the balance of deionized water is used for anodic oxidation coloring. The post-treatment comprises sealing treatment and drying. According to the technical scheme, the technical problems that the anodic oxidation coloring technology is completely free of fluorine, low in toxicity and safe to operate, and the oxidation waste liquid is free of pollution and easy to treat can be solved, existing pretreatment steps can be simplified, and meanwhile uniform coloring is achieved.

The invention provides a wear-resistant, transparent, flexible and fluoride-free super-hydrophobic composite coating and a preparation method thereof. The preparation method comprises the following steps: mixing hydroxyl-terminated polydimethylsiloxane, gamma-aminopropyltriethoxysilane and dibutyltin dilaurate for reaction to obtain a modified precursor solution, adding swelled epoxy resin into the modified precursor solution, and heating for reaction to obtain siloxane modified epoxy resin; the preparation method comprises the following steps: dispersing nano silicon dioxide in an ethyl acetate solution to form a SiO2 suspension; and uniformly mixing the modified epoxy resin with a SiO2 suspension, adding polyether amine as a curing agent, stirring and mixing, and constructing the epoxy resin / hydroxyl-terminated polydimethylsiloxane / nano-silica super-hydrophobic coating on a substrate by adopting an air spraying mode. According to the preparation method disclosed by the invention, the super-hydrophobic coating with excellent transparency and flexibility and good adhesive force and wear resistance can be prepared, and the super-hydrophobic coating has a wide application prospect in the fields of wearable electronic equipment, photoelectric devices and the like.

The invention relates to the technical field of waterproof agents for fabrics, and particularly discloses a fluoride-free waterproof agent for fabrics and a preparation method of the fluoride-free waterproof agent. The preparation method specifically comprises the following steps: dehydrating polyol / ester, adding isocyanate, heating to 80-90 DEG C, reacting for 2-3 hours, cooling, dropwise adding a chain extender, reacting for 0.5-1 hour at 45-48 DEG C, adding POSS, stirring for 1-2 hours at 45-48 DEG C, adding an acrylic monomer A for blocking, cooling, dropwise adding acid, stirring and neutralizing to obtain a prepolymer; pouring the prepolymer into water, stirring and emulsifying to obtain a POSS-PU emulsion; quickly stirring the POSS-PU emulsion, an acrylic monomer B, an emulsifier, water, a co-emulsifier, a pH regulator and the like to obtain a composite emulsion; homogenizing the composite emulsion until the composite emulsion has obvious blue light; and adding dodecanethiol and an azo amidine initiator, reacting at 68-70 DEG C for 3-7 hours, cooling, filtering and taking out to obtain the fluoride-free waterproof agent.

The invention provides a titanium nitride doped fluoride-free photo-thermal super-hydrophobic coating and a preparation method and application thereof.The titanium nitride doped fluoride-free photo-thermal super-hydrophobic coating is prepared from polydimethylsiloxane modified titanium nitride, hydrophobic nanoparticles and an adhesive and has the excellent local surface plasma resonance effect and photo-thermal effect; meanwhile, the coating is of a rough and uniform micro-nano hierarchical structure, dynamic water can be efficiently removed, icing can be delayed, the surface temperature can reach 12 DEG C only through irradiation of one sunlight intensity in the environment of-30 DEG C, and rapid deicing can be achieved. The coating has good functions of self-cleaning, anti-icing, deicing, defrosting and the like, renewable solar energy is utilized, and the coating is green, environment-friendly, energy-saving and emission-reducing. Meanwhile, the super-hydrophobic surface of the coating can effectively delay icing and inhibit ice adhesion. According to the coating, organic combination of an active deicing strategy and a passive deicing strategy is achieved based on the synergistic effect of the super-hydrophobicity and the photothermal effect.

Provided in the present application are a bio-based fluoride-free waterproof agent, and a preparation method therefor and the use thereof. In the present application, firstly, a bio-based monomer is added into a reaction; secondly, a rosin-based amino acid surfactant is introduced, which is a bio-based ampholytic surfactant, has the advantages of good decontamination, resistance to hard water and being stable to an acid and an alkali and has the performances of sterilization, corrosion prevention, static electricity resistance, etc.; and finally, a lignin-furfural bio-based resin is added after the reaction, which resin is a new furfural bio-based resin, can be uniformly cross-linked on the surface layer of a yarn to adhere fiber ends to the yarn, and has a relatively strong adhesive force, such that the resin can bond the fibers, thereby limiting the movement of the fibers. The raw materials of the fluoride-free waterproof agent prepared in the present application are derived from bio-based products and are completely biodegradable in the natural environment, such that the fluoride-free waterproof agent is environmentally friendly and safe, thereby increasing the regenerative and environmentally friendly values of the product and having significant social benefits and wide market prospects.

The invention relates to a preparation method of a core-shell fluorine-free super-hydrophobic emulsion based on acrylate pressure-sensitive adhesive viscosity. According to the method, a polyacrylate pressure-sensitive adhesive is adopted, an acrylate soft monomer and a functional monomer are copolymerized on the surface layer of the polyacrylate pressure-sensitive adhesive, and a polyacrylate copolymer with pressure-sensitive adhesiveness and reaction activity is coated to obtain a pressure-sensitive adhesive'rigid core at flexible shell 'core-shell polymer microsphere emulsion with a core-shell structure; the production process is simplified (two steps are combined into one step), and chromatic aberration is eliminated; the silane coupling agent can be used for replacing a silane coupling agent, and the problem of insufficient durability is further solved. According to the invention, the simplification and batch production of the production process can be effectively realized, and meanwhile, the requirements of modern industry on economic and green production can be met.

The invention discloses a fluoride-free waterproof sound-transmitting film and a preparation method thereof, and the fluoride-free waterproof sound-transmitting film comprises the following components in percentage by mass: 30-40% of a fluoride-free polymer; 4.5%-11.5% of a fluoride-free waterproof agent; 0.5%-3.5% of a cross-linking agent and 45%-65% of a solvent; the solvent is a mixed solvent of N 'N-dimethylformamide, N' N-dimethylacetamide, acetone and ethyl acetate, and the mass ratio of the amide solvent in the mixed solvent is 60%-85%; the preparation method of the fluoride-free waterproof sound-transmitting film comprises the following steps: preparing a spinning solution; carrying out electrostatic spinning by utilizing electrostatic spinning equipment to obtain a continuous and uniform nano spinning membrane; the method comprises the following steps: uniformly depositing nanofibers on a nano spinning film base material, and carrying out post-treatment to obtain a finished product of the fluoride-free waterproof sound-transmitting film, the fluorine-free safe and healthy product with good water resistance and air permeability, high rebound resilience and excellent acoustic performance is successfully prepared through selection of raw materials, preparation of a spinning solution, spinning process parameters and fine regulation and control of post-treatment conditions.

The invention relates to the field of zipper processing, in particular to a processing method of a fluoride-free DWR waterproof zipper, which sequentially adopts four steps of pretreatment, padding treatment, drying treatment and heat treatment to carry out waterproof processing on the zipper, the fluorine-free DWR waterproof zipper prepared by matching paraffin, polyether modified silicone oil, carbodiimide, nano silicon dioxide dispersion liquid, fatty alcohol-polyoxyethylene ether and diethylene glycol monobutyl ether has the following advantages that 1, the fluorine-free DWR waterproof zipper meets the limitation requirements of Europe and America regulations and various standards on fluorine element, 2, the waterproof grade meets the grade 4.5 or above of standards such as AATCC / ISO / GB / T and the like, and the fluorine-free DWR waterproof zipper has a good waterproof effect. 3, the washing resistance can reach more than 20 times of washing and drying tests; 4, the phenomenon of white grasping in the market is avoided; and 5, the anti-siphon performance can reach 10H without climbing.

The invention relates to the technical field of layered composite fabrics, and discloses a light-absorbing and heat-emitting chinlon fabric, a preparation method and application of the light-absorbing and heat-emitting chinlon fabric to thermal fabrics. According to the invention, the fluorine-free and waterproof light-absorbing and heating finishing agent with excellent light-absorbing and heating performance is prepared, then the sulfydryl silane modified chinlon single-layer fabric is subjected to surface finishing by adopting the light-absorbing and heating finishing agent through sulfydryl-alkene click reaction, and the prepared light-absorbing and heating chinlon single-layer fabric is used as the surface layer fabric; the light-absorbing and heating chinlon fabric obtained by compounding the light-absorbing and heating chinlon fabric with the inner layer made of the acrylic fiber / special-shaped section chinlon blended yarn not only has excellent light-absorbing and heating performance, but also has good waterproof performance of the surface layer, good warm-keeping performance of the inner layer and good wearing comfort, and can be applied to warm-keeping fabrics.

The invention discloses a fluoride-free reinforced wear-resistant polyketone composite material as well as a preparation method and application thereof, and relates to the technical field of polymer composite materials. The fluoride-free reinforced wear-resistant polyketone composite material comprises polyketone resin, glass fibers, modified ultra-high molecular weight polyethylene, an antioxidant and a lubricant, wherein the modified ultra-high molecular weight polyethylene is obtained by modifying branched-chain-free linear polyethylene with the molecular weight of 2 million or more, and the dosage of the modifier is 1%-5% of that of the ultra-high molecular weight polyethylene. The modified ultra-high molecular weight polyethylene, the glass fiber and the polyketone resin are subjected to blending modification, and the characteristics of good wear resistance of the polyketone resin and high strength of the glass fiber are combined; meanwhile, the friction coefficient is low after the ultra-high molecular weight polyethylene is modified, the compatibility with the polyketone resin is enhanced, the dispersion is more uniform, and the heat resistance and friction performance of the polyketone resin are comprehensively improved. In addition, due to the use of fluorine-free, the safety of the polyketone composite material is improved, and meanwhile, the application market of the polyketone composite material is expanded.

The invention discloses a preparation method of a metal organic framework modified fluorine-free super-amphiphobic coating, and belongs to the technical field of super-amphiphobic coatings. According to the technical scheme, the method comprises the steps of preparation and modification of a metal organic framework and formation of a fluoride-free super-amphiphobic coating. Adding a metal oxide and nano silicon dioxide particles into a polyacrylic acid solution to form spherical particles; enabling the spherical particles to react with imidazole ligands to obtain metal organic framework particles with porous spherical structures, and wrapping nano silicon dioxide particles in the metal organic framework particles; modifying the metal organic framework particles by using a silane coupling agent; the preparation method comprises the following steps: firstly, attaching modified metal organic framework particles to the surface of a metal matrix, then attaching fluorine-free alkyl silane to the surface of the metal matrix, and heating and curing to obtain the fluorine-free super-amphiphobic coating. The fluorine-free super-amphiphobic coating is applied to the aspect of a metal surface super-amphiphobic coating, and the problems that an existing fluorine-free super-amphiphobic coating is poor in oleophobic and hydrophobic performance and poor in durability are solved.

The invention discloses a fluoride-free flotation-microbiological leaching-multistage magnetic separation synergistic tailing purification process, which takes mine tailings as raw materials and is realized by the following steps: 1, fluoride-free flotation desliming and impurity removal: replacing hydrofluoric acid with a novel anion collector (fatty acid derivative), and preferentially removing mica and feldspar under the condition that the pH is 2.5-3.5; 2, removing iron and aluminum by microbiological leaching: leaching for 48 hours at the temperature of 35 DEG C by utilizing an acidophilus bacillus ferroxidans bacterial solution, and dissolving Fe2O3 and Al2O3 in a wrapped state; 3, high-gradient magnetic separation refining: removing magnetic minerals through 1.2 T strong magnetic separation, and then separating weak magnetic impurities through 0.8 T weak magnetic separation; the indexes of the final product are as follows: the purity of SiO2 is greater than or equal to 99.9%, the whiteness is greater than or equal to 94% (ISO standard), the content of Fe2O3 is less than or equal to 80ppm, Al2O3 is less than or equal to 1200ppm, and the requirements of electronic grade (IOTA-4 standard) quartz powder are met.

The invention relates to a preparation method of fluorine-free antifouling bio-based polyurea coating resin with high wear resistance, and belongs to the technical field of high polymer materials. According to the method, polydimethylsiloxane (PDMS) is locked in a polyurea matrix through an interpenetrating network polymerization (IPN) technology, and the environment-friendly coating is prepared by combining a bio-based raw material castor oil (CO) and benzene-free isocyanate. The preparation method comprises the specific steps of prepolymer preparation, mixing of polyaspartic acid ester and PDMS, vacuum defoaming and curing forming. The obtained coating does not contain fluorine compounds and volatile organic solvents (VOCs), and has high hydrophobicity (the water contact angle is larger than or equal to 105 degrees), wear resistance (the Taber wear index is smaller than or equal to 0.1558) and excellent mechanical performance (the tensile strength is 16.64-20.69 MPa). By adjusting the content of PDMS (X value is 10-25%), the hardness (69D-77D), surface energy (26.0-27.8 mJ.m <-2 >) and other properties of the coating can be regulated and controlled, and the coating is suitable for antifouling scenes such as building walls and industrial equipment, and has remarkable environmental protection advantages and application prospects.

The invention belongs to the technical field of coatings, and particularly relates to a fluoride-free anti-icing coating and a preparation method and application thereof.The coating comprises a component A and a component B, and the mass ratio of the component A to the component B is 100: 16.3-19.5; wherein the component A comprises the following components in parts by weight: 60-65 parts of modified acrylic resin; 1-1.5 parts of a low surface energy additive; 8 to 10 parts of nano silicon dioxide; 3-5 parts of a lubricating filler; 0.3 to 0.5 part of a dispersant; 0.5 to 1.5 parts of an adhesion promoter; 16.5 to 27.2 parts of a compound solvent; and the component B is aliphatic polyisocyanate resin. The anti-icing coating has a low surface energy hydrophobic effect and a dynamic lubricating effect, and has excellent anti-icing performance under the synergistic effect of the low surface energy hydrophobic effect and the dynamic lubricating effect.

The present disclosure relates to a fluoride-free binder material for a positive electrode, and a preparation method therefor and the use thereof. Provided are a fluoride-free binder material for a positive electrode and a preparation method therefor. A copolymer of acrylonitrile and an acrylate is used as a main body structure, an ionic monomer is introduced, and a polyfunctional olefin monomer is introduced during polymerization to increase the branching degree of a polymer, thereby preparing a highly-branched acrylonitrile polymer modified via copolymerization, which polymer is used as a fluorine-free binder material for a positive electrode. The modified binder can provide more sites for contact between active materials and between a current collector and the active materials so as to further enhance the bonding ability, thereby increasing the overall cohesive force and improving the adhesion to the current collector; and the binder can effectively inhibit the fracture and delamination of an electrode sheet during processing, ensures the compactness of a positive electrode material even in the case of a low use amount, and retains structural integrity and cycling stability during cycling.

The invention belongs to the technical field of polyurethane waterproof coatings, and particularly relates to a single-component fluorine-free high-hydrophobicity polyurethane waterproof coating and a preparation method thereof, and the single-component fluorine-free high-hydrophobicity polyurethane waterproof coating comprises the following raw materials by weight: 60-80 parts of composite polyether polyol; 20 to 40 parts of silane modified polyether polyol; 11 to 17 parts of diisocyanate; 2-5 parts of a chain extender; 50 to 70 parts of a plasticizer; 50 to 70 parts of filler; 0.15 to 0.2 part of a catalyst; and 3-5 parts of an auxiliary agent. A polyoxypentene ether chain segment, a castor oil-based structure and a silane group are introduced into the molecular structure of the waterproof coating through chemical modification, the intrinsic hydrophobic and mechanical properties of the material are improved, the migration defect caused by addition of a hydrophobic agent and silicone oil in a traditional preparation method is overcome, and the invention further provides a preparation method of the waterproof coating.

The invention discloses a polyetherketoneketone high-temperature-resistant wear-resistant non-stick coating and a preparation method thereof. The coating is prepared from the following components in parts by mass: 13 to 30 parts of a resin matrix group (containing 12 to 25 parts of titanium modified polyether ketone ketone resin, 1 to 5 parts of fluorine-free viscous resin and 0.65 to 6 parts of aluminum oxide), 0.5 to 3 parts of a nano reinforced group (containing 0.5 to 3 parts of KH-550 modified nano titanium dioxide, 0.025 to 0.6 part of cerium dioxide and 0.5 to 3 parts of boron nitride) and 62 to 71 parts of an auxiliary agent group. The preparation method comprises the following steps: 1) taking diphenyl ether, paraphthaloyl chloride and isophthaloyl chloride as monomers, and synthesizing titanium modified polyether ketone ketone resins with different viscosities through segmented polymerization (1.5-2.0 hours or 3.0-4.0 hours); 2) respectively preparing a smooth bottom layer water dispersion slurry and a wrinkled surface layer water dispersion slurry; and (3) forming a compact bottom layer and a micro-wrinkle surface layer on the base material by adopting a layered spraying and stepped sintering process (280-320 DEG C, 10-20 minutes). The whole system of the coating is fluorine-free and has temperature resistance gt; the coating has the characteristics of high temperature resistance (350DEG C), wear resistance (Taber wear rate of 3-5mg / 1000r), non-sticking (contact angle gt, 100 DEG C) and heavy corrosion resistance, and is suitable for cooking utensils and chemical equipment.

The present invention relates to the field of food packaging, and in particular to a mixed coating liquid and a fluorine-free oil-proof barrier paper and a preparation method thereof, which are prepared by uniformly mixing the following raw materials in percentage by mass: component A: 1-5% silica gel; component B: 1-5% methylhydrogensiloxane / polysiloxane; component C: 5-15% styrene; component D: 3-10% acrylic acid; component E: 5-20% butyl acrylate; component F: 20-70% water; the sum of the mass percentages of the above components is 100%. At the same time, a fluorine-free oil-proof barrier paper is provided, which is formed by coating a mixed coating liquid on at least one surface of a paper substrate. This scheme completely excludes the use of fluoride-containing materials, realizes green packaging product materials that are harmless to the human body, and conforms to the concept of environmental protection and health. At the same time, through a specific silicon nano-modified material mixed coating liquid, this scheme reaches the oil-proof level of 6 and above (up to 12) required by the market, effectively preventing grease penetration and keeping the outer surface of the package clean.

The invention discloses a long-chain alkyl acrylate polymer dispersion liquid which is composed of a long-chain alkyl acrylate polymer, alcoholic hydroxyl-terminated long-chain alkyl silicone oil, a surfactant, a cosolvent and water. The long-chain alkyl acrylate polymer at least comprises a long-chain alkyl acrylate monomer unit and a monomer unit containing an active hydroxyl group; and the alcoholic hydroxyl-terminated long-chain alkyl silicone oil accounts for 15-40% of the total mass of the long-chain alkyl acrylate polymer and the alcoholic hydroxyl-terminated long-chain alkyl silicone oil. The fluorine-free fabric finishing agent dispersion liquid is good in stability and excellent in continuous processing performance when waterproof processing is carried out on fabrics, and the fabrics treated by the fluorine-free fabric finishing agent dispersion liquid are excellent in waterproof performance and good in washability.

The invention relates to a method for preparing a KFI molecular sieve membrane by utilizing a secondary growth method, in particular to a method for preparing the KFI molecular sieve membrane through rapid induction under the conditions of no template agent, no fluorine medium and no heavy metal. According to the method for preparing the KFI molecular sieve membrane by adopting the seed crystal method under the condition of not using a template agent, fluoride and noble metal ions, the membrane synthesis time and the membrane application cost can be remarkably reduced, and the industrial application of the KFI molecular sieve membrane is promoted.

The invention provides a binder, a positive pole piece and a secondary battery. The binder comprises a fluorine-free polymer, the fluorine-free polymer comprises a first structural unit and a second structural unit, and the pH value of the binder is 6-10. The binder disclosed by the invention not only has good bonding performance, but also has the effects of inhibiting collapse of a main material structure under high temperature and high voltage and reducing internal heat production of the secondary battery, so that the positive pole piece has good safety performance and cohesion, and the thermal safety performance and energy density of the secondary battery are improved.

The invention discloses a preparation method of fluorine-free hydrolysis-resistant knurling polyurethane synthetic leather, which comprises the following steps: preparing wet-process polyurethane resin for leather by adopting PTMG (polytetramethylene glycol) with proper polymerization degree as a chain extender through a pre-polymerization process, preparing soft hydrolysis-resistant wet-process polyurethane resin by adopting bio-based poly-farnesyl alcohol as a main raw material through an insufficient method, and preparing the fluorine-free hydrolysis-resistant knurling polyurethane synthetic leather by adopting a high-temperature-resistant wet-process polyurethane resin. The two components are matched to optimize and balance the embossing performance and the thickness retention rate, the finally obtained soft hydrolysis-resistant polyurethane synthetic leather product is soft and glutinous in hand feeling and good in hydrolysis resistance, the thickness reaches the standard, and embossing is clear and does not rebound; a fluorine-containing water repellent does not need to be added, and the method is simple in process, low in cost and energy consumption and excellent in product performance.

The invention relates to the field of food packaging and coatings, and provides a bio-based fluoride-free environment-friendly oil-proof agent for food packaging paper and paperboards, which is simple in preparation process, green and environment-friendly and has the bio-based raw material proportion of 70% or above. The bio-based fluoride-free environment-friendly oil-proof agent is characterized in that the bio-based fluoride-free environment-friendly oil-proof agent is prepared by synergistic micro-nanocrystallization of paper pulp fibers, starch and inorganic particles under the action of high-speed shearing and grinding; the prepared oil-proof agent can be coated on the surfaces of sized or unsized paper, paperboards and paper pulp molded products by a conventional coating method, the coated finished product has good oil-proof performance, the coating weight is 1.5-15g / m < 2 >, and the oil-proof grade tested by a Kit method after drying can reach 12 grade to the maximum. Compared with a fluoride-free oil-proof agent on the market at present, the bio-based fluoride-free environment-friendly oil-proof agent disclosed by the invention can obtain good oil-proof performance under a relatively low coating weight, is biodegradable and is easy to recycle and reuse.

The present application relates to the field of polymer composite materials, and more specifically, it relates to a fluorine-free flame retardant PC material and a preparation method thereof, which is composed of the following raw materials in weight percentage: 10-15% silicon PC, 0.1-1% anti-aging agent, 2-6% fluorine-free flame retardant, and the balance is PC; the fluorine-free flame retardant is composed of at least three of polydiphenyloxyphosphazene, tetraphenyl bisphenol A diphosphate, polydimethylsiloxane, and methacrylate-based phenyl polymer complex. When polydiphenyloxyphosphazene, tetraphenyl bisphenol A diphosphate, polydimethylsiloxane, and methacrylate-based phenyl polymer complex are compounded, a synergistic effect is achieved, and the silicon PC is combined to make the prepared PC material have better flame retardant properties, light transmittance, anti-aging properties, and physical properties.

The invention belongs to the field of waterproof and oil-proof agent materials, and particularly relates to an environment-friendly degradable fluoride-free oil-resistant and fat-resistant agent as well as a preparation method and application thereof, and the environment-friendly degradable fluoride-free oil-resistant and fat-resistant agent is prepared from the following raw materials in parts by weight: 40-50 parts of biological wax, 4-6 parts of modified polyacrylate, 15-20 parts of rosin, 1-2 parts of shellac, 75-100 parts of filler and 150-190 parts of deionized water. The oil-resistant and fat-resistant agent prepared by the invention can effectively prevent grease and water from permeating, has good waterproof and oil-resistant effects, and has good degradability.

The invention discloses a highly-transparent bio-based polyurethane fluoride-free antifouling coating and a preparation method and application thereof.The highly-transparent bio-based polyurethane fluoride-free antifouling coating is prepared by taking tannic acid (TA) as biological polyol, hexamethylene diisocyanate trimer (HDIT) as a cross-linking agent and monohydroxy polydimethylsiloxane (PDMS-OH) as a low-surface-tension material through thermocuring cross-linking, so that the highly-transparent bio-based polyurethane fluoride-free antifouling coating is prepared. And the tannic acid-based polyurethane fluoride-free antifouling coating is prepared. The coating shows up to 99% of optical transparency, has an ultraviolet shielding effect, and has excellent self-cleaning, anti-doodling and anti-artificial fingerprint pollution capabilities, and water, hexadecane, vegetable oil and pump oil easily slide off from the surface without traces. And even if the coating is repeatedly written and erased for 500 times, the coating still keeps excellent anti-graffiti performance. Due to the excellent adhesive force of the TA, the TA can be applied to various base materials. When the coating is bent and folded, the coating is still kept complete, the coating does not crack or peel off, and the coating has a wide application prospect.