83results about How to "Improve water and oil repellency" patented technology

The invention provides a method for preparing a core-shell nano SiO2/fluorine-containing polyacrylate soap-free emulsion. The method provided by the invention can be used for synthesizing the core-shell nano SiO2/fluorine-containing polyacrylate soap-free emulsion by introducing nano SiO2 by a sol-gel method and copolymerizing a polymerizable emulsifier, a fluorinated acrylic ester monomer and an acrylate monomer with double-bond alkoxy silane, by a soap-free emulsion polymerization technique; and the core-shell nano SiO2/fluorine-containing polyacrylate soap-free emulsion is suitable for being used as a fabric waterproof/oilproof finishing agent. The method provided by the invention has the advantages that negative influence of a small molecular emulsifier on fluorine containing polyacrylate is eliminated, excellent properties of nano SiO2 are introduced into the fluorine-containing polyacrylate and the fluorine-containing monomer is located at the shell layer, and therefore, a fabric finishing agent with excellent water repellence and oil repellence is obtained; and compared with the similar products, the fabric finishing agent prepared by the method provided by the invention is low in cost.

The present invention discloses preparation process of fluorine, silicon and epoxide modified low surface energy acrylate emulsion for heavy anti-corrosive paint. The modified acrylate emulsion is prepared with one or more of styrene, methyl methacylate, butyl acrylate, isobutyl acrylate, tert-butyl acrylate, etc as the main monomer and through introducing modifying fluorine, silicon and epoxide. The process of the present invention has simple operation and high yield, and the prepared emulsion has high water tolerance, high solvent tolerance, high acid and alkali resistance, high stability and capacity of forming film with surface energy as low as 15.5 mN/m.

The invention discloses an environment-friendly fluorinated polyurethane-polyacrylate emulsion and a preparation method thereof. The preparation method comprises the following steps: polymerizing diisocyanate, dimethylolpropionic acid, a functional monomer and an anionic hydrophilic chain extender under the presence of a catalyst so as to obtain an isocyanate-terminated double-bond prepolymer; neutralizing with alkali and adding the water solution of a hydrophilic small-molecule chain extender for dispersing, and further initiating a fluorinated monomer and an acrylic monomer under the effect of a water-soluble initiator so as to obtain the environment-friendly fluorinated polyurethane-polyacrylate emulsion. The emulsion adopts a self-emulsifying method, and is subject to a post-chain extension method and free from any organic solvent or small-molecule emulsifier; and the emulsion is good in storage stability, and by introducing fluorine atoms, the water resistance and the solvent resistance of waterborne polyurethane are effectively improved. The emulsion is applicable to a waterborne coating, and a prepared coating film has the properties of excellent water and oil-proofing performance, heat resistance, being non-toxic, safe and highly glazed, and the like.

The invention relates to a water and oil proofing agent and a preparation method thereof. The water and oil proofing agent comprises a fluoro-containing polymer component, a wax component, an emulsifier, a cosolvent and deionized water in a mass ratio of 1:0.1-0.4:0.05-0.15:0.1-0.3:2-4, wherein the fluoro-containing polymer component is copolymerized from a fluoro-containing monomer, an acrylate monomer and a reactive monomer with crosslinking feature in a mass ratio of 20-40:45-75:5-15; and the wax component is paraffin or microcrystalline wax or a mixture of paraffin and microcrystalline having a melting point of 50-70 DEG C. The water and oil proofing agent can be used for greatly improving the water and oil proofing performance of fabrics, and is more environment-friendly and lower in price in comparison with C8 products in the prior art especially when the fluoro-containing polymer component is a short-chain fluoroalkyl monomer having the number of carbon atoms of 1-6, and is capable of achieving the water and oil proofing performance of the C8 products.

The invention provides a preparation method of water-based fluorine-acrylic acid-containing self-stratifying emulsion for protection of a concrete surface. A fluorine-containing modified acrylic acid core-shell emulsion prepared by adopting an emulsion polymerization method, an acrylic acid core-shell emulsion, various auxiliaries and water are prepared into a self-stratifying emulsion for protection of concrete surface, the coating technology is simplified, the excellent weather resistance, contamination resistance, hydrophobic and oleophobic property advantages of the fluorine-containing (methyl) acrylate can be played to the greatest extent, the environment protection can be achieved, and the cost can also be lowered.

The present invention provides a waterproof breathable antibacterial thermoplastic polyurethane elastomer and a preparation method thereof. The thermoplastic polyurethane elastomer is prepared from the following main components by weight: 40-50 parts of polymeric polyol, 30-40 parts of isophorone isocyanate, 10-15 parts of 1,4-butanediol, 10-15 parts of nano ZnO-modified dihydroxy polydiphenylsiloxane and 5-10 parts of hydroxyethyl acrylate. The present invention uses a mixture of fluorine-containing polyether glycol and adipic acid 1,4-butanediol adipate diol as the polymeric polyol; the synergic effect of the two improves the water and oil repellency of the target product; while dihydroxy polydiphenylsiloxane and hydroxyethyl acrylate supplemented with nano ZnO increase the antibacterial properties of the thermoplastic polyurethane elastomer, and endow the elastomer with good mechanical properties.

The invention relates to a fabric finishing agent and a preparation method thereof, and belongs to the technical field of printing and dyeing auxiliary agents. The fabric finishing agent contains a polyether chain segment, an epoxy group and a fluorine-containing chain segment at the same time, and the one end of the fluorine-containing chain segment contains an alkene. the characteristics of being safe in raw materials, simple in technology and the like are provided when the fabric finishing agent is applied to printing and dyeing and the preparation method is applied to prepare the fabric finishing agent, the fabric finishing agent is capable of keeping original clothes performances and hand feeling of fabrics, and also is capable of effectively improving the water-repellent oil-repellent properties of fabrics.

The invention relates to a waterproof and oilproof agent as well as a preparation method and application thereof. The waterproof and oilproof agent is prepared from the following components in percentage by weight: 30%-50% of styrene acrylic polymer, 5%-10% of beeswax emulsion, 2.5%-4.5% of polyvinyl alcohol, 2%-5.5% of modified starch, 0.5%-2% of plasticizer and 28%-60% of deionized water. The waterproof and oilproof agent is good in film-forming property; beeswax emulsion in a formed coating and the styrene-acrylic acid polymer are combined to form a hydrophobic and oleophobic surface layer;meanwhile, the hydrophobic and oleophobic surface layer is compounded with the modified starch, so that the waterproof and oilproof effects of the waterproof and oilproof coating on food-grade raw paper are obviously improved; the waterproof and oilproof properties of the waterproof and oilproof agent are extremely good; the waterproof and oilproof agent can completely replace traditional waxing,silicon coating and laminating processes; and the paper can directly enter a papermaking pulping system to be recycled when being recycled, the pollution of the laminated paper to the environment isreduced; and therefore, the waterproof and oilproof agent is an environment-friendly material.

The invention discloses a UV-curable low-shrinkage environment-friendly coating, and belongs to the field of coatings, in particular to the field of UV-curable coatings. The UV-curable low-shrinkage environment-friendly coating comprises the following raw materials: cis-butenedioic anhydride, cyclohexanol methacrylate, methyl methacrylate, epoxy resin, tetraethyl orthosilicate, sodium dodecyl sulfonate, a solvent, a wetting agent, a dispersant, a leveling agent, a photoinitiator, an anti-skimming agent, white carbon black and asbestos dust. The curing product of the coating is excellent in performance, and a sample obtained after curing has excellent adhesion, scratch resistance and anti-fouling performance.

The invention relates to a water-based waterproof oil-proof agent for special paper, and a preparation method thereof. The preparation method comprises the following steps: enabling a polyisocyanate compound and water to react with hydrogen-containing silicone oil, vinyl polyether, perfluoro-acrylate, glycidyl methacrylate, long alkyl chain methacrylates and chloroplatinic acid to obtain a product under the dark condition; performing grafted polymerization reaction to the hydrogen-containing silicone oil, vinyl polyether, perfluoro-acrylate, glycidyl methacrylate and long alkyl chain methacrylates under the catalysis action of chloroplatinic acid, and then adding a polyisocyanate compound to partially close hydroxyl on a polymer chain, thus obtaining the water-based waterproof oil-proof agent for special paper, and the water-based waterproof oil-proof agent for special paper has excellent mechanical performance and waterproof and oil-proof properties. The prepared waterproof oil-proof agent can be compounded with a starch water solution and used for paper surface sizing, so that the waterproof, oil-proof, mechanical strength and softness of paper can be greatly improved.

The invention discloses a preparation method of a cationic core-shell fluorinated acrylate-alkyd resin surface sizing agent, and relates to the technical field of sizing for paper making. The method adopts a solution phase inversion emulsion polymerization method, ensures that acrylic monomer is grafted to alkyd resin through the adding of an initiator and double bond bonding, forms the sizing agent for a core-shell structure by taking the theoleophylic alkyd resin as a core and the hydrophilic acrylic monomer as a shell through crosslinking, and ensures that a system combines the water and oil proofing property of fluorinated acrylic resin and the high adhesive property of alkyd resin, thereby being capable of effectively improving the water and oil proofing property and physical strengthproperty of paper.

The invention relates to a preparation method of a cation polyacrylate soap-free emulsion containing fluorine. The preparation method comprises following steps: dodecafluorhe-ptylacrylate or dodecafluoroheptyl methacrylate, N-alkyl diene propyl amine, and methyldiallylamine are mixed so as to obtain a mixed monomer A; oil soluble initiator azodiisobutyronitrile is added, an obtained mixture is heated to a certain temperature for polymerization, and a terpolymer is obtained; organic fluorine monomer and acrylate monomer are mixed so as to obtain a mixed monomer B; the terpolymer and water are added so as to obtain a monomer pre-emulsification liquid C; and water soluble initiator azobis(2-methylpropionamidine) dihydrochloride is added, and finished products are obtained via polymerization. The cation polyacrylate soap-free emulsion containing fluorine is a white emulsion; pH value ranges from 4.0 to 7.0; when the cation polyacrylate soap-free emulsion containing fluorine is mixed with water at a ratio of 9:1, no delamination is caused in 24 hours; and the cation polyacrylate soap-free emulsion containing fluorine possesses excellent storage stability, and can be stored at room temperature for 6 months without deterioration. The cation polyacrylate soap-free emulsion containing fluorine is capable of improving water resistance and oil resistance of paper or leather significantly.

The invention discloses a water and oil repellent finishing method for a bag type dedusting material and relates to a material finishing method for high-temperature gas treatment of steel works, industrial furnaces, and industrial boilers. The finishing method comprises the following steps of: (1) preparing a finishing agent, namely weighing polytetrafluoroethylene (PTFE) emulsion, polymethylphenyl siloxane fluid emulsion, alcohol, Tween, glycerol, a hardening agent, resin HA, and adhesive and water in a mass ratio and placing in a container, stirring and mixing uniformly, and thus obtaining the finishing agent for later use; (2) padding the dedusting material by using the prepared finishing agent by a padding machine, wherein the pressure of a rotary drum of a compression roller during padding of the dedusting material is 0.5 to 0.7 MPa, and the speed of the rotary drum is 3.5 to 5.5 m/min; (3) allowing the padded dedusting material to pass through a drying oven, wherein the drying temperature is 140 to 190 DEG C, and the travel speed of the dedusting material in the drying oven is 3.5 to 5.5 m/min; and after the dedusting material is dried, winding the dried dedusting material on a fabric roller to finish the water and oil repellent finishing work of the bag type dedusting material.

The invention discloses a water and oil repellent nanometer finishing agent for fabric. The water and oil repellent nanometer finishing agent comprises nanometer zinc oxide, a silane coupling agent, a surfactant, ethanol, acetic acid and deionized water. The water and oil repellent nanometer finishing agent is applicable to fabric for woven clothing and home textile fabric; the water and oil repellent effects and the stability of the fabric can be obviously improved; the preparation technology is simple and convenient; and the cost is low.

The invention discloses a method of coating the surface of a polyphenylene sulfide filter material with polytetrafluoroethylene. The method comprises the following steps: (1) preparing a polytetrafluoroethylene composite coating agent from a PTFE dispersion liquid, an acrylate adhesive and waterborne epoxy resin according to the mass ratio of 82 to 15 to 3; (2) preparing a composite finishing liquid from the polytetrafluoroethylene composite coating agent, silicone oil, an organosilicon waterproofing agent, a penetrating agent and distilled water according to the mass ratio of (10 to 12) to (1 to 2) to (3 to 6) to (1 to 2) to 200; and (3) soaking the polyphenylene sulfide filter material into the composite finishing liquid, drying and roasting the soaked polyphenylene sulfide filter material at high temperature to prepare the polyphenylene sulfide filter material of which the surface is coated with the polytetrafluoroethylene. Compared with the prior art, the method has the advantages that the filter material has little possibility of being oxidized and is good in corrosion resistance and film-forming property and adhesive force of the polytetrafluoroethylene, has the water resistance and oil resistance and can be widely used in the polyphenylene sulfide filter material in coal fired high-temperature flue gas.

The invention relates to a low-migration and high-barrier local positioning anti-counterfeiting laser food packaging board and a production method thereof. The packaging board comprises a base paper layer, and a PE lamination layer, a vacuum aluminized layer, a local positioning anti-counterfeiting laser layer, a laminating coating layer and a plasma corona PET film layer which are sequentially compounded on the upper surface of the base paper layer from bottom to top. Compared with packaging materials in the prior art, the packaging food integrates the holographic laser anti-counterfeiting effect of a local positioning cat eye lens and the dual-protection ultrahigh-barrier property of the PE lamination layer and the plasma corona PET film in order to prevent effective migration of the aluminized layer, achieves the multiple effects of beauty, counterfeiting resistance and ultrahigh barrier, and promotes the development and innovation of the packaging industry.