210results about How to "Excellent water and oil repellency" patented technology

The invention discloses a preparation method of a high-performance fingerprint-resistant agent. The preparation method includes the following steps that hydroxyl-terminated perfluorinated polyether and allyl bromide react to obtain allyl-terminated perfluorinated polyether; allyl-terminated perfluorinated polyether and hydrogen-containing silicone oil are subjected to a layer adding reaction through silicone hydrogen, and perfluorinated polyether-hydrogen-containing silicone oil (unreacted hydrogen still exists in silicone oil) is obtained; the obtained product and allyl siloxane continue to be subjected to a silicone hydrogen water adding reaction to obtain a needed target product pectinate perfluorinated polyether-siloxane; then pectinate perfluorinated polyether-siloxane is prepared into the fingerprint-resistant agent. The prepared fingerprint-resistant agent has the advantages of being good in hydrophobic and oleophobic performance, excellent in anti-fouling property and good in fingerprint easy-to-move property, a fingerprint-resistant coating and a glass base material are high in bonding force, the product is good in abrasion resistance, and compared with the prior art, the durability and abrasion resistance of the fingerprint-resistant agent are greatly improved.

Aqueous dispersible fine emulsion of complete acrylic ester copolymer as oil- and water-resisting agent is prepared by: preparing complete alkyl copolymerized monomer fine emulsion dispersed uniformly, and then polymerizing without organic solvent and emulsifying to aid it. It is stable for restore or dilution, and can be used for substrate materials of fabrics, leathers or paper as waterproof and oil-proof finishing agent.

The invention relates to a production technology of a double-faced cotton fabric. The production technology comprises the following steps: 1. drying the dyed or whitened double-faced cotton fabric to prepare grey cloth for standby; 2. mixing 10wt% of adhesive WSF, 3wt% of water and oil repellent AFF300 %, 1.76wt% of thickener FN and 85.24wt% of softened water evenly to prepare printing paste; 3. coating the printing paste on one side of the grey cloth, sending to a printing machine to perform coating layer printing treatment, sending to a dryer for drying; 4. sending the dried grey cloth to a tentering and forming machine for curing treatment; and 5. adding 30g of hydrophilc agent RWS per 1L of water in the groove of the stentering forming machine, after the curing treatment, and sending the grey cloth to the tentering and forming machine again to perform tentering and forming and hydrophilic finishing treatments. The production technology of the invention can be used to ensure that the front of the fabric has interface structure with complimentary geometry and shows good water repellent and oil repellent properties; and the back of the fabric has hydrophilic and moisture transmission performances under the premise of not affecting the properties of the front of the fabric.

The invention belongs to the technical field of fabric finishing agents, and particularly relates to a method for preparing a fluorine-containing acrylate copolymer textile finishing agent, which is characterized by sequentially comprising the following steps of: 1, preparing fluorine-containing acrylate: slowly dripping a perfluor alkyl acyl compound by using (methyl) acrylic hydroxy alkyl ester as a raw material and phenothiazine as a polymerization inhibitor in the presence of a catalyst; and 2, preparing a fluorine-containing acrylate copolymer: pre-emulsifying polymer monomer by adding an emulsifying agent, and dripping an initiator into pre-emulsion for polymerizing the emulsion under the protection of nitrogen. The fluorine-containing acrylate copolymer emulsion is used as a waterproof oil resistant finishing agent for fabrics; and the finished fabrics present excellent waterproof oil resistance property. Carbon atoms of long-chain perfluor alkyl in the fluorine-containing acrylate monomer prepared by the method are not less than 8, and hidden dangers of damaging the environment and harming human health by the long-chain perfluor alkyl waterproof oil resistant fabric finishing agent do not exist.

A lens including a lens substrate, a surface layer, and a backing member provided beneath the surface layer, in which the backing member may be either the same as the lens substrate or a separate layer from the lens substrate, and wherein the surface layer includes a hydrolysis-condensation product of a perfluoropolyether modified silane with a hydrolysable functional group or a halogen atom X at both terminals, represented by a general formula (1) shown below:

(wherein, Rf is a bivalent group with a straight chain perfluoropolyether structure containing no branching, which incorporates a unit represented by a formula —(C_kF_2kO)— (wherein, k represents an integer from 1 to 6)) is resistant to the adhesion of contaminants to the surface thereof, can be easily wiped to remove any adhered contaminants, provides a slippery surface that is difficult to scratch, and moreover displays excellent durability and is capable of retaining the above properties over extended periods.

The invention discloses a preparation method of a high-performance anti-fingerprint agent. The preparation method comprises the following steps that firstly, allyl terminated perfluoropolyether reactswith a siloxane compound containing silicon-hydrogen bonds for obtaining a perfluoropolyether silane compound containing silicon-hydrogen bonds, the obtained product reacts with methyl vinyl dichlorosilane for obtaining perfluoropolyether-silane with dichlorosilane modified terminal groups, the obtained perfluoropolyether-silane with dichlorosilane modified terminal groups reacts with allyl magnesium bromide for obtaining terminal allyl modified perfluoropolyether-silane with polyfunctional groups, the obtained terminal allyl modified perfluoropolyether-silane with polyfunctional groups reacts with methyldichlorosilane for obtaining dichlorosilane modified perfluoropolyether-silane, dendritic terminal allyl modified perfluoropolyether-silane is obtained by repeated reaction; and then theobtained dendritic multi-functional perfluoropolyether-silane reacts with a siloxane compound containing silicon-hydrogen bonds for obtaining the dendritic perfluoropolyether alkoxy silane compound with polyfunctional groups. The anti-fingerprint agent prepared by the method provided by the invention has a good hydrophobic oleophobic property and excellent antifouling property, and has excellent bonding fastness to glass substrates, and the wear resistance and the durability are greatly improved.

The invention provides a method of preparing fluorinated polyurethane paint. The method is characterized by comprising the following steps: a step of preparing a component A, namely adding 15-60 parts of fluorinated polyether polyol and 0.01-0.03 part of dibutyltin dilaurate into a three-necked flask with a stirring rod in sequence, and stirring for 30 minutes to obtain the component A; a step of preparing a component B, namely adding 10-40 parts of 4,4-diphenyl methane diisocyanate and 0-30 parts of collaborative anticorrosive filler into 20-60 parts of a solvent system to stir and dissolve to obtain the component B; and a step of preparing fluorinated polyurethane anticorrosive paint, namely adding the component B into the three-necked flask filled with the component A, stirring for 8-10 minutes, grinding the mixed materials in the three-necked flask until fineness is 40-50 mu m after uniformly stirring, coating a metal sheet with the grinded mixed materials and curing for 24 hours to obtain the fluorinated polyurethane anticorrosive paint.

The invention discloses a water and oil repellent finishing agent for fabrics and a preparation method of the finishing agent. The active ingredient of the finishing agent refers to perfluoroalkyl silicone acrylate copolymer. The preparation method comprises the following steps: mixing perfluoroalkyl silicone acrylate, butyl acrylate, methyl methacrylate and hydroxyethyl methylacrylate, initiating free radical emulsion copolymerization by virtue of a water-soluble initiator under the emulsification actions of a nonionic surfactant and an anionic surfactant, thereby obtaining the emulsion type perfluoroalkyl silicone acrylate water and oil repellent finishing agent with high stability for fabrics. The finishing agent is applied for finishing cotton fabrics, and the water and oil repellent effects are obviously improved. The water and oil repellent finishing agent provided by the invention is mild in preparation conditions, simple and convenient in preparation process and suitable for industrial production.

The invention relates to a core-shell type fluorinated acrylate fabric water repellent which comprises the components by weight percent: 25-50% of monomer, 50-75% of deionized water, an initiator and an emulsifying agent, wherein the weight of the initiator is 0.5-1.5% of the total weight of the monomer, and the weight of the emulsifying agent is 1.0-3.5% of total weight of the monomer. A preparation method of the water repellent comprises the steps of respectively preparing shell emulsion and core emulsion, and then dripping the shell emulsion and the initiator into the core emulsion for reaction to obtain the core-shell type fluorinated acrylate fabric water repellent. The core-shell type fluorinated acrylate fabric water repellent is applied to water and oil repellent finishing of the fabric, so that the fabric has excellent water and oil repellent property, and the problems that the existing water and oil repellent is poor in use durability, low in fastness and the like in the aspect of wearability can be solved; furthermore, the performances such as air permeability, moisture permeability and the like of the fabric are not influenced, and the environmental pollution is not caused.

The invention relates to a preparation method of a pyrohydrolysis-resistant meta-position aramid fiber material. The preparation method is characterized in that: a meta-position aramid fiber three-layer structural body made by adopting a no-weaving technology is taken as a filter material green body, the meta-position aramid fiber three-layer structural body is subjected to padding by pyrodydrolysis-resistant finishing liquor which contains polytetrafluoroethylene and epoxy phenolic resin mainly and then is subjected to low temperature antimigrant primary drying and high temperature crosslinking, thus a membrane structure which is completely coated and is uniformly distributed with polytetrafluoroethylene particles, high temperature water vapor is isolated from contacting fibers, retention rate of longitudinal and transverse breaking forces of hydrolysis at higher continuous working temperature are 100-107%, water repellency level and oil repellency level are obviously improved, the filter material is difficult to damage, is easy to clean ash, does not paste bag and does not harden, differential pressure of a dust removal system is small, service life of a filter bag is prolonged, and the filter material can be widely applied to high temperature flue gas dedusting and filtering of steel and iron, electricity generation, cement, a coal-fired boiler and the like. The preparation method disclosed by the invention can directly use the traditional production equipment and has a simple process and low production cost.

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 discloses a fluorinated textile finishing agent composition and a preparation method therefor. The composition comprises a polymer which is prepared through emulsifying monomers and other adjuvants by an emulsifier to initiate polymerization, wherein the monomers consist of the ingredients in parts by mass: 30-70 parts of perfluoroalkyl acrylate monomer, 10-60 parts of fatty alcohol acrylate monomer, 1-30 parts of cross-linking monomer and the balance of reinforcing monomer, and all the ingredients are 100 parts in total. The method comprises the following steps: stirring to disperse the perfluoroalkyl acrylate monomer, the fatty alcohol acrylate monomer, the cross-linking monomer, the emulsifier, a cosolvent, a chain transfer agent and water in a reactor, and then, carrying out pre-emulsification; adding the reinforcing monomer into the pre-emulsification at the temperature of 0-30 DEG C; and heating the reinforcing monomer added pre-emulsification to the temperature of 50-80 DEG C, and adding an initiator into the heated pre-emulsification so as to carry out polymerization reaction. The textile finishing agent prepared according to the method is environment-friendly and is low in cost, excellent in waterproof and oilproof performance and good in durability.

The invention discloses an environment-friendly type self-crosslinking water and oil repellent fluorinated acrylate textile finishing agent and a preparation method thereof. The preparation method comprises the following steps: mainly introducing a reaction type cation fluorinated emulsifier and a polymerizable cross-linking agent, applying the emulsifier and the cross-linking agent to seeded emulsion polymerization of short fluorocarbon chain perfluoroalkyl acrylate, in situ forming an macromolecular cation organic fluorine copolymer emulsifier during the seeded polymerization process, and in the follow-up emulsion polymerization, enabling the fluorine-containing group to be stably arranged in an emulsion particle shell layer under the action of the polymerizable cross-linking agent; with the results of comprehensive functions of the emulsifier and the polymerizable cross-linking agent, the resin can be used as the textile finishing agent to show up good water repellency, oil repellency and processing continuity.

The invention provides a silicon-fluorine-containing styrene-acrylic emulsion and a preparation method thereof. The silicon-fluorine-containing styrene-acrylic emulsion mainly comprises the following components in percentage by mass: 5-30% of acrylate monomer, 5-25% of styrene, 1-8% of organosilane, 1-5% of organic fluorine, 2-7% of emulsifier, 0.5-2% of initiator, 0-2% of hydrolysis inhibitor and 0.1-0.5% of ammonia water. The styrene-acrylic emulsion provided by the invention has the advantages of the organosilicon and organic fluorine, can effectively lower the emulsion cost, and has better water resistance and oil resistance.

The invention discloses a core-shell type acrylic acid ester latex containing fluorine (methyl) which is prepared from monomers, emulsifying agent, initiating agent, pH regulator and water through supersonic wave pre-emulsion by employing core-shell emulsion polymerization. Compared with the prior art, the invention is characterized in that the fluorine monomer is enriched in the shell layer, thus greatly reducing the consumption of fluorine monomer.

The invention provides a water-repellent oil-repellent composition imparting excellent water- repellency and oil-repellency to substrates such as fiber products, and preventing the adhesion of the polymer on a roller in processing. The water-repellent oil-repellent composition is a fluorine-containing composition comprising a fluorine-containing polymer, and the fluorine-containing polymer has: (a) repeating units derived from a fluorine-containing monomer having a fluoroalkyl group, (b) repeating units derived from a second monomer, wherein the second monomer is a straight-chain or branched-chain hydrocarbon acrylate monomer having a carbon atom number of 12 to 30, and (c) repeating units derived from a third monomer, wherein the third monomer is an acrylate monomer with homopolymer glass transition temperature (Tg) or the melting point (Tm) of more than 50 DEG C (methyl); and in the fluorine-containing polymer, relative to the total amount of the second monomer (b) and the third monomer (c) being 100 parts by weight, the second monomer (b) is in an amount of 82 to 99.9 parts by weight or 2 to 60 parts by weight, and the third monomer (c ) in an amount of 0.1 to 18 parts by weight or 40 to 98 parts by weight.

The invention provides a composition for increasing hydrophobic and oleophobic behavior of paper product and method which comprises, preparing slurry from 50-100 parts of gasket material, or gasket material and pigment, high speed agitating, low speed agitating and charging 1-20 parts of bonding agent, 1-10 parts of organic fluorine resin emulsion, 0.5-15 parts of crosslinkable wax emulsion, 0.05-5 parts of flowing deformation modifier, diluting to obtain a solid content of 20-80%.