83results about How to "Play a role in crosslinking" patented technology

The powerful adhesive includes neoprene, grafting monomer, thickener, dispersant, adhesion promoter, catalyst, antioxidant, solvent, stuffing, etc. The present invention also discloses the preparation process of the adhesive, and the preparation includes introducing grafting monomer to neoprene molecule chain to raise the adhesion strength, selecting proper adhesion promoting resin to increase the initial adhesion force, and adopting mixed solvent to form high adhering performance. The adhesive has high solid content and excellent environment protecting performance, and has also excellent antiageing performance, high resistance to heat, oil, chemical and corrosion, high weather resistance, good mildew-proof performance, antibiotic performance, etc. and may be used for adhering timber, concrete, rubber, metal, gypsum board, brick and other building material.

The present invention provides a preparation method for aqueous polyurethane. The method comprises the following steps: mixing aliphatic diisocyanate, an aliphatic polyol, dimethylol propionic acid and a catalyst, and carrying out a reaction to obtain a prepolymer; adding a neutralizing agent to the prepolymer, and carrying out a stirring reaction to obtain an intermediate product; adding water and a chain extender to the intermediate product, stirring and dispersing to obtain the aqueous polyurethane, wherein the chain extender is polyoxyethylene polyamine or polyoxypropylene polyamine. The invention further provides the aqueous polyurethane prepared by the method. According to the present invention, the bulk polymerization method is adopted, the use of the organic solvent is not required, and no environmental pollution is generated; the polyoxyethylene polyamine or the polyoxypropylene polyamine is adopted as the chain extender, and is used for emulsion chain extending, such that the obtained polyurethane emulsion has good film-forming flexibility, the mechanical property of the obtained polyurethane can not be reduced, the large R value is not required, and the final produced polyurethane film is soft.

The invention belongs to the field of organic/inorganic nano composite hydrogel, and particularly discloses a preparation method of polymer hydrogel based on cross-linking of a two-dimensional titanium carbide layered compound. The method comprises the step of: with Ti3C2 nanosheets as a cross-linking agent and acrylic compounds and/or acrylamide compounds as monomers, performing a polymerizationreaction so as to obtain the polymer hydrogel. The invention also discloses the polymer hydrogel prepared by using the preparation method and application of the polymer hydrogel as a thermo-sensitivephase-change and/or near-infrared photothermal conversion material. According to the preparation method, the obtained polymer network structure is in situ doped with the Ti3C2 nanosheets which participate in the polymerization reaction through a physical and chemical crosslinking mode, not only can novel photoelectric characteristics be given to the polymer hydrogel, but also excellent mechanicalproperties, such as self-healing performance and high toughness, can be achieved.

The invention discloses a highly skin friendly bacteriostatic fabric and a preparation method thereof. The bacteriostatic fabric includes a modified base-layer fabric and a waterproof layer laid on the modified base-layer fabric; the modified base-layer fabric is obtained by spinning and forming with modified antibacterial fiber as a raw material, and the waterproof layer is prepared by processinga homogeneous mixture of modified waterproof fiber and hot melting fiber; the modified base-layer fabric has good skin friendliness and antibacterial properties, the waterproof layer laid on the modified base-layer fabric after forming by an air-laid technology is obtained by adopting the skin friendly fabric as a raw material to be subjected to water modification of surface water, on the one hand, compared with a textile fabric, pores of the waterproof layer formed by the air-laid technology are smaller, water and wind resistant effects of the fabric are advantageously improved, and on the other hand, the prepared modified waterproof fiber taking the skin friendly fabric as the raw material can make the fabric still maintain good air permeability.

The invention discloses a production method of polyester fabric with hygroscopicity. The method comprises the following steps that (1) alkaline treatment solution is prepared, polyester fibers are immersed in the solution, and washing and drying are conducted; (2) sucrose fatty acid ester solution is prepared, and the polyester fibers are immersed in the sucrose fatty acid ester solution, then washed and dried; (3) a certain mass of raw silk is taken and prepared into 2-5% of sericin solution; (4) 8-12 wt% of epichlorohydrin, 1-5 wt% of tetrabutylammonium bromide, 1-3 wt% of coupling agent, 30-50 wt% of JCH solution with the concentration 0.3% and 40-50 wt% of sericin solution are prepared; (5) the polyester fibers are immersed in the solutions prepared in the step (4), then washed and dried; (6) secondary immersion is conducted on the polyester fibers treated through the step (5), and then washing and drying are conducted; (7) the polyester fibers are made into fabric. According to the method, the outer surface of the polyester fibers is coated with a layer of sericin, and sericin has excellent hygroscopicity, so that the defect of poor hygroscopicity of polyester fibers is overcome.

The invention relates to gelatin bacteriostatic fiber modified by trivalent cerium and a preparation method and application thereof. The gelatin bacteriostatic fiber is prepared by a method of blending trivalent cerium solution and gelatin solution, performing solution spinning and heating and drying in vacuum. The gelatin bacteriostatic fiber is characterized in that: due to the adoption of the trivalent cerium, the gelatin bacteriostatic fiber not only has the effect of antibacterium and anticoagulation but also has improved strength and water resistance. As the fiber has high mechanical property, biocompatibility and the effect of antibacterium and anticoagulation, the fiber has a wide application prospect in the field of medicament, spinning and the like.

The present invention is one kind of filming resin containing silicon couplant and one kind of antireflecting coating composition prepared with the resin and used in microelectronic photoetching process adopting KrF laser, ArF laser or F2 laser as exposure light source. The filming resin consists of mainly silicon-containing acrylate couplant monomer in 1-40 weight portions and acrylate couplant monomer containing light absorbing group in 1-40 20-80 weight portions, and is prepared through copolymerization in solution in the presence one free radical initiator and corresponding pre-treatment. The antireflecting coating liquid is compounded with the filming resin, stabilizer, leveling agent and small amount of additive in solvent. The silicon-containing acrylate couplant participate in the copolymerization and cross-linking reaction and may result in good photoetched pattern.

The invention provides a high-bending-resistance PU (polyurethane) shoe material which is prepared from the following components in parts by weight: 40-60 parts of polyether glycol, 5-15 parts of chain extender, 25-35 parts of isocyanate, 2-6 parts of nano montmorillonite, 0.3-1 part of coupling agent, 0.1-0.5 part of catalyst, 0.1-0.5 part of antioxidant and 0.5-2 parts of water. The invention also provides a manufacturing method of the high-bending-resistance PU shoe material. The PU shoe material provided by the invention has excellent bending resistance.

The invention belongs to the technical field of binders used in casting production molding and core making processes, and particularly relates to a phenolic resin binder with less resin content. The phenolic resin binder comprises the following raw materials of thermosetting resol, thermosetting resitol, aqueous alkali with the mass concentration of 50%, a modifier, potassium pyrophosphate, boricacid, an alkaline regulator, ammonium sulfate, lauryl glucoside, polycarbonate diol, an organometallic carboxylic acid compound, sodium lignosulfonate and a silane coupling agent. Compared with the prior art, the phenolic resin binder has the following advantages that different properties of the thermosetting resol and the thermosetting resitol are utilized to perform a reaction with the modifierand the aqueous alkali under a high temperature condition, so that the obtained phenolic resin binder has good binding strength; and compared with the prior art, the addition amount of phenolic resinis reduced, the good pressure resistance strength is ensured, and the phenolic resin binder can be used for casting and enhancing the service performance of molding sand.

The invention relates to an effective method for simultaneously improving the recovery rate of whey protein or protein in MPC, improving the membrane flux and reducing the lactose retention rate through complex enzyme polymerization coupling ultrafiltration. Concretely, laccase and transglutaminase are sequentially added; complex enzyme polymerization and ultrafiltration are effectively combined; a two-section type pretreatment mode is creatively used before complex enzyme polymerization; the mode that the enzyme is not deactivated after the laccase action is also combined, so that the purity and the recovery rate of the whey protein or the protein in the MPC is greatly improved; the membrane flux is improved; the lactose retention rate is reduced. Compared with the prior art, the method has the advantages that the recovery rate of the whey protein or the protein in the MPC is improved by 20 percent; the membrane flux is improved by 30 percent to 40 percent; the lactose retention rate is reduced by 10 percent; the method capable of simultaneously solving a plurality of problems is obtained. The invention also provides a high-quality product of the whey protein or the protein in the MPC; the condition that the product sensitization is obviously reduced is accidentally found; the effect is realized through the result of the complementary and synergic action of all work procedures and parameters; the operability of the method is high; only once filtering is performed; the industrialization is facilitated.

The invention provides a preparation method of an electrolyte separator for the vanadium battery. The preparation method comprises the following steps of 1) preparing quaternary ammonium silane; 2) preparing a polymer; and 3) preparing the separator. The invention also discloses the electrolyte separator, obtained by the preparation method of the electrolyte separator for the vanadium battery, forthe vanadium battery and the vanadium battery employing the electrolyte separator for the vanadium battery as an electrolyte separator. Compared with a traditional quaternary ammonium salt negative ion exchange membrane in the prior art, the electrolyte separator for the vanadium battery, prepared by the method has the advantages of lower cost, better mechanical property, better chemical stability and better thermal stability, more excellent vanadium blocking performance, higher ion conductivity and small deformation, and the application requirement of the electrolyte separator for the vanadium battery is met.