44results about How to "Improve anti-corrosion function" patented technology

The invention discloses an ultrathin high-temperature-resistant thermal-insulation paint which is used for thermal insulation of an industrial high-temperature heating furnace. The paint is prepared from 70-300 parts of resin emulsion, 10-30 parts of pigment, 50-80 parts of filler, 1-3 parts of rare-earth oxide, 10-40 parts of assistant and 100-300 parts of water. The resin emulsion is prepared by mixing a special monomer-modified self-crosslinked acrylate copolymer with one or two of pure acrylic resin emulsion and inorganic silicon compounds. By using the high flowability and film formation property of the special monomer-modified self-crosslinked acrylate copolymer and the high-temperature stability, low thermal conductivity and heat storage property of the rare-earth oxide, the formed paint has the advantages of high temperature resistance, high resilience and aging resistance. The paint with the thickness of only 2-3mm can enhance the heat efficiency of the heating furnace by more than 1.5%, and the heat radiation loss of the furnace body external surface is lowered by not less than 40%. After the paint is constructed at normal temperature, the cured paint can resist the high temperature of 200-300 DEG C, has the advantages of high adhesive force, favorable ductility and favorable corrosion resistance, and can be widely used for outer surface thermal insulation of heating furnaces, high-temperature medium storage tanks, high-temperature pipelines, annealing furnaces, thermal pipelines and the like.

The invention relates to a high-temperature resistant anti-corrosion modified epoxy organic silicon coating and a preparation method. The coating uses organic phosphate and fluoropolymer to modify epoxy organic silicon resin which originally has excellent high-temperature resistant and anti-corrosion properties; with organic phosphate group introduced, not only the high-temperature resistance of resin is improved, but also the later anticorrosion property of the coating can be improved to certain extent. In the film forming process of the coating, the organic phosphate group and substrate metal form a compact phosphate protective film, thus passivating metal surface, preventing water molecules and salt ions from being contacted with metal and further leading the coating to have excellent anticorrosion function. With the fluoropolymer with high-temperature resistance and chemical corrosion resistance introduced, the polymerization between the fluoropolymer and active organic silicon group can distinctly improve the high-temperature resistance of resin. The matched use of the modified epoxy organic silicon resin and a high-temperature resistant pigment can lead the coating to not only maintain proper physical mechanical property, but also have excellent anticorrosion performance under the high temperature condition of 350 DEG C.

The invention discloses an underwater epoxy resin coating and a preparation method thereof. The underwater epoxy resin coating consists of a component A and a component B, wherein the component A is a composition of liquid epoxy resin, polymer hollow microspheres, white carbon black, pigment and filler; the component B is a compound curing agent blended by hydrophilic amine curing agent and oleophilic curing agent; in the component A, the mass ratio of the liquid epoxy resin to the polymer hollow microspheres to the white carbon black to the pigment and filler is 60-70: 0.05-0.1: 2-6: 30-40, and the mass sum of the components is 100; and in the component B, the mass ratio of the hydrophilic amine curing agent to the oleophilic curing agent is 1: 3-4. The mass ratio of the component A to the component B is 1: 0.25-0.35. The coating has excellent adhesive force on wet surface of underwater metallic structure and nonmetallic structure materials; the coating has good leveling property, good film formation property and smooth coating, and can form a thick film at one time; and the formed film has good protection effect on the surface of the coated material.