33results about How to "Good oil-repellency" patented technology

The present invention provides a fluoropolymer capable of giving excellent washing durability and water and oil repellency to fibers. The fluoropolymer has a repeating unit derived from a fluorine-containing monomer (a) containing a first fluorine-containing monomer (a1) and a second fluorine-containing monomer (a2), and the first fluorine-containing monomer (a1) is represented by CH2=C(-X1)-C(=O)-Y1-Z1-Rf1, wherein X1 is a halogen atom, Y1 is-O-or-NH-, Z1 is a valence bond or a divalent organic group, Rf1 is a fluoroalkyl group having 1 to 20 carbon atoms, the second fluorine-containing monomer (a2) is represented by CH2=C(-X2)-C(=O)-Y2-Z2-Rf2, in the formula, X2 is a monovalent organic group or a hydrogen atom, Y2 is-O-or-NH-, Z2 is a valence bond or a divalent organic group, and Rf2 isa fluoroalkyl group having 1 to 20 carbon atoms.

Disclosed is a water- and oil-repellent agent comprising the following fluorine-containing copolymer (A). The fluorine-containing copolymer (A) comprises:(a1) a fluoroalkyl group-containing polymerizable monomer of the formula:wherein Y is a divalent organic group[for example, an aliphatic group having 1 to 10 carbon atoms, an aromatic or cycloaliphatic group having 6 to 10 carbon atoms, a —SO2N(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), a —CON(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), or a —CH2CH(OY1)CH2— group (in which Y1 is a hydrogen atom or an acyl group having 1 to 4 carbon atoms)]; andRf is a linear or branched fluoroalkyl or fluoroalkenyl group having 1 to 6 carbon atoms; and(a2) vinylidene chloride.

The invention relates to a water-repellent, oil-repellent, sun-proof, anti-bend torsion and cold-resistant matt-leather-membrane aqueous coating adhesive for textiles and a preparation method of the matt-leather-membrane aqueous coating adhesive. The preparation method comprises the steps of emulsifying isooctyl acrylate, isobornyl methacrylate, glycidyl methacrylate, trifluoroethyl methacrylate, vinyl trimethoxysilane, hydroxypropyl acrylate, fatty alcohol ethoxylate XL90 and dodecyl benzene sulfonate to trigger polymerization, and compounding a thickening agent, namely an associated polyurethane flatting rheological agent, a cross-linking agent, namely terminated isocyanate, a flatting agent, namely polymethyl urea resin and silicon dioxide with the particle size of 2-7 microns, so as to obtain the matt-leather-membrane aqueous coating adhesive.

The invention relates to a waterproof ventilated membrane for car light. The waterproof ventilated membrane is formed by compounding of three layered structures and comprises a fabric layer, a waterproof ventilated layer and a bonding layer which is arranged between the above fabric layer and the waterproof ventilated layer and is used for connecting the fabric layer and the waterproof ventilated layer. The invention solves defects existing in the prior art. According to the waterproof ventilated membrane for car light, a fabric material and an expanded polytetrafluoroethylene film undergo compounding, laminated water resistance and oil resistance processing so as to obtain a multifunctional high-molecular material, thus endowing the expanded polytetrafluoroethylene film with better strength, waterproofness, permeability, oleophobic performance, long life, weldability and the like and maintaining internal and external pressure balance. The waterproof ventilated membrane can be used to raise reliability of many automobile parts, including parts of a car light, an engine controller / anti-lock braking system module, a sensor, a connector, an electric car window motor, a fuel system and the like, and is applied in automobile and heavy trucks. Air exchange can be carried out rapidly according to the pressure variation generated by temperature change, and vehicles can be protected from being polluted by water, automobile discharged fluids and dust.

The invention provides a dynamic oleophobic siloxane self-enrichment epoxy coating and its preparation method and application, belonging to the technical field of polymer materials. The siloxane self-enrichment epoxy coating of the present invention is prepared from raw materials comprising polysiloxane, epoxy resin, 3-aminopropyltriethoxysilane and organic solvent; the epoxy resin, 3-ammonia The mass ratio of propyltriethoxysilane to the organic solvent is (1-10):(0.02-0.1):2; the mass of the polysiloxane is less than 70% of the mass of the epoxy resin. The dynamic oleophobic siloxane self-enrichment epoxy coating provided by the invention has oil repellency, stain resistance, high stability and strong adhesion to various substrates.

The invention relates to a preparation method of a nano hydrosol, in particular to a preparation method of a nano rare-earth hydrosol, which comprises the following process flow: preparing a chloride solution into a solution A with the concentration of 0.2-1.5mol / L and the pH value of 1-5; placing in a water bath at 25-65 DEG C; adding hydrogen peroxide, wherein the volume ratio of the hydrogen peroxide to the solution A is 1:(30-75); stirring to obtain a mixed solution B; mixing strong ammonia water with water in the volume ratio to obtain a precipitant C; slightly heating at 30-45 DEG C, and then pouring into the mixed solution B; regulating the temperature to 55-85 DEG C for water bath for 2-5h; raising the temperature to 95 DEG C; stirring for 10-45 min, then filtering and washing; adding a saltpeter solution in a filter cake; and stirring at 70-95 DEG C for 25-60 min to obtain the nano rare-earth hydrosol. The invention solves the technical problem that a nano rare-earth oxide dispersion as a traditional adhesive in the conversional fired mold casting is easy to cause agglomeration.