5results about How to "Avoid demulsification" patented technology

The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.

This invention belongs to the field of waterborne anti-corrosion coating manufacturing technology, specifically relating to highly corrosion-resistant waterborne coatings and their preparation methods. This invention uses waterborne epoxy resin emulsion and waterborne acrylic emulsion as resin matrices, improving the film density of the waterborne coating. In the composite anti-rust pigment, surface-modified graphene and calcium-ion-loaded silica particles are grafted with epoxy groups using KH-560, improving the compatibility of the calcium ion-exchange type anti-rust pigment in the resin matrix. Modified mica iron oxide and surface-modified graphene extend the diffusion path of corrosive media through a layered structure. Potassium silicate helps form an inorganic silicate protective layer and seals the micropores of the coating, improving the coating's shielding performance. The calcium ion-exchange type anti-rust pigment generates a silicate passivation film through calcium ion exchange, reducing the rate of further iron dissolution. The waterborne coating of this invention is suitable for anti-corrosion protection of metal substrates in harsh corrosive environments such as marine salt spray and industrial acids and alkalis.

The invention discloses a manufacturing method of flexible water-resistant mortar. The manufacturing method comprises the following steps: preparing raw materials, namely weighing cement, quartz sand with different granularities, filler, cellulose ether, nano silicon dioxide, polymer emulsion and auxiliaries; dry mixing and stirring: mixing and stirring the cement, the quartz sand, the filler, the cellulose ether and the nano silicon dioxide; adding water for premixing: adding a proper amount of water into the mixed dry material and uniformly stirring; emulsion addition: adding a polymer emulsion, a coalescing agent and a water repellent, and continuously stirring; adding auxiliaries: adding a water reducing agent, a defoaming agent and a coloring agent, and increasing the stirring speed until the slurry is uniform; according to the present invention, the nano-silica and the water repellent are added to enhance the compactness and the hydrophobicity of the mortar so as to improve the impermeability and the durability of the product, and meanwhile, the ratio of the polymer emulsion to the filler is adjusted, and the segmented stirring process is combined, such that the flexibility of the product is significantly improved, and the cracking phenomenon can be effectively prevented.

The application relates to the technical field of high polymer compound synthesis, in particular to a silane type emulsion polymerization stabilizer, application and a silicone-acrylate emulsion stabilized by the same. The preparation steps of the silane type emulsion polymerization stabilizer are as follows: (1) an epoxy silane is subjected to ring-opening reaction and polyether amine to form a polyether silane-epoxy silane mixture, and (2) the mixture is prepared into a polyether silane-epoxy silane oligomer through condensation reaction. By optimizing the preparation raw materials and preparation method of the polyether silane-epoxy silane mixture, the use amount of the stabilizer is controlled, the emulsion stabilized by the stabilizer can exhibit excellent stability, and in addition, the stabilizer can also improve the physicochemical properties of the emulsion, such as hardness, adhesion and water resistance. The stabilizer is synthesized without inert solvent, the method is environment-friendly, simple and effective.

The invention discloses a method for inhibiting rust of rusted steel bars in a concrete structure, and aims to solve the problems that in the prior art, a safe, environment-friendly and long-acting steel bar corrosion inhibitor convenient to construct is lacked, and a long-acting steel bar corrosion prevention method formed by compounding materials such as an efficient anti-corrosion coating is lacked. Through three innovations of organic silicon modification, a nano-composite technology and a self-crosslinking system, the core problems of poor weather resistance, high VOC (Volatile Organic Compounds), insufficient dispersion stability and the like of the traditional acrylic emulsion are solved, and the acrylic emulsion is particularly suitable for severe environments with high ultraviolet rays, high humidity and the like, so that long-period corrosion prevention is realized, and the service performance of concrete is improved.