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CN-118909500-B - High-temperature-resistant heat-insulating coating, preparation method and application thereof in petrochemical pipeline

CN118909500BCN 118909500 BCN118909500 BCN 118909500BCN-118909500-B

Abstract

The invention discloses a high-temperature-resistant heat-insulating coating, a preparation method and application thereof in petrochemical pipelines. The high-temperature-resistant heat-insulating coating comprises 100-140 parts of organosilicon modified acrylic aqueous dispersion, 10-30 parts of modified hollow glass beads, 10-30 parts of curing agent, 5-10 parts of nano reflecting powder and 2-4 parts of auxiliary agent. Compared with the prior art, the high-temperature-resistant heat-insulating coating prepared by the invention has the advantages of strong high-temperature resistance, good heat-insulating effect, aging resistance and strong chemical stability.

Inventors

  • SONG ZHAOBIN

Assignees

  • 青岛中氟氟碳材料有限公司

Dates

Publication Date
20260512
Application Date
20240823

Claims (6)

  1. 1. The high-temperature-resistant heat-insulating paint is characterized by comprising, by mass, 100-140 parts of an organosilicon modified acrylic aqueous dispersion, 10-30 parts of modified hollow glass beads, 10-30 parts of a curing agent, 5-10 parts of nano reflecting powder, 2-4 parts of an auxiliary agent and 20-40 parts of water; the organosilicon modified acrylic acid aqueous dispersion is prepared by the following method: Heating 100-125 parts of solvent to 110-140 ℃ under the protection of nitrogen, dropwise adding a mixture of 15-20 parts of glycidyl acrylate, 15-20 parts of methyl methacrylate, 15-20 parts of benzyl acrylate, 15-20 parts of acrylic acid and 1-2 parts of azodiisobutyronitrile into the solvent within 1-3h, adding 5-15 parts of dimethylphenylsilane into the solvent within 5-15min after the dropwise addition is finished, and adding 0.1-1 part of initiator, reacting for 2-4h at 110-140 ℃ and 600-800rpm, reducing the temperature to 60-80 ℃, adding 120-180 parts of water, stirring for 5-10min at 600-800rpm, and adding diethanolamine to adjust the pH=6-8 to obtain the organosilicon modified acrylic acid aqueous dispersion; the modified hollow glass microsphere is prepared by the following method: According to parts by mass, 10-30 parts of hollow glass beads are dried for 2-4 hours at 100-140 ℃, added into 100-150 parts of ethanol, stirred for 5-10 minutes at 50-70 ℃ and 600-800rpm, added with 1-3 parts of aluminate coupling agent for reaction for 20-40 minutes, subjected to suction filtration, and the obtained hollow glass beads are dried for 2-4 hours at 100-140 ℃ and then filtered by a 200-mesh filter screen, and sealed, thus obtaining the modified hollow glass beads.
  2. 2. The high temperature resistant and heat insulating paint as claimed in claim 1, wherein the curing agent is at least one of isocyanate and aziridine.
  3. 3. The high temperature resistant and heat insulating paint as claimed in claim 1, wherein the nano reflecting powder is at least one of nano titanium dioxide, nano zinc oxide and nano silicon dioxide.
  4. 4. The high temperature resistant and heat insulating paint as claimed in claim 1, wherein the auxiliary agent is at least one of defoamer, dispersant and anti-aging agent.
  5. 5. The method for preparing the high-temperature resistant heat preservation coating according to any one of claims 1 to 4, which comprises the following synthesis steps: Uniformly mixing 100-140 parts of organosilicon modified acrylic aqueous dispersion and 10-30 parts of modified hollow glass beads for later use; Step two, mixing and stirring 10-30 parts of curing agent, 2-4 parts of auxiliary agent, 5-10 parts of nano reflecting powder and 20-40 parts of water uniformly for standby; Step three, stirring and mixing the mixture obtained in the step one and the mixture obtained in the step two uniformly to obtain the high-temperature-resistant heat-preserving coating; the parts are parts by mass.
  6. 6. Use of the high temperature resistant thermal insulation coating according to any one of claims 1-5 in petrochemical pipelines.

Description

High-temperature-resistant heat-insulating coating, preparation method and application thereof in petrochemical pipeline Technical Field The invention relates to the technical field of coatings, in particular to a high-temperature-resistant heat-preserving coating, a preparation method and application thereof in petrochemical pipelines. Background In the petrochemical industry, the energy lost by pipeline heat dissipation each year accounts for about one third of the total energy consumption, and the corrosion of petrochemical pipelines brings a plurality of potential safety hazards to the production and operation of the petrochemical pipelines. Therefore, corrosion protection and heat preservation are important to the petrochemical industry. At present, the domestic refining enterprises generally use rock wool, aluminum silicate rolled felt and the like with traditional porosities to insulate heat and preserve heat for equipment and pipelines, the thickness of a common heat preservation layer can reach 100-200mm, the construction process is complex, the cost is high, and the thick heat preservation layer can cover the damage condition of the equipment and the pipelines, so that the petrochemical enterprises are difficult to avoid the conventional production risks and potential safety hazards. Meanwhile, the heat-insulating layer of special-shaped parts such as elbows, tees, valves and the like is complex in structure, more in interfaces and extremely high in construction difficulty, and the parts are often in a bare state, so that the heat-insulating layer is a weak link for heat insulation of equipment and pipelines. In particular, the traditional porous heat insulation material often has no corrosion resistance, and corrosion factors can be easily attached to and stored in pores of the heat insulation material to become a heat conduction medium, so that the heat insulation efficiency of equipment and pipelines is greatly reduced, and the service life of the whole heat insulation system is shortened. CN1935912a discloses a nano ceramic high temperature resistant heat preservation coating and a preparation method thereof, and ceramic microspheres are added to improve the high temperature resistant heat preservation performance of the coating. The nano ceramic microspheres added in the nano ceramic high-temperature resistant heat preservation coating prepared by the method may have poor interface compatibility with film forming substances. CN115873456a discloses a water-based high temperature resistant paint and a preparation method thereof, and the high temperature resistant performance of the paint is improved by adding mixed water-based resin and functional modified powder. The coating prepared by the method mainly has the effects of heat insulation and heat preservation through reflective heat insulation and radiation heat insulation. Disclosure of Invention In view of the above-mentioned defects of the prior art, the present invention aims to provide a high temperature resistant heat preservation coating, which has the advantages of high temperature resistance, good heat preservation performance and strong chemical stability. In order to achieve the aim, the invention provides a high-temperature-resistant heat-preserving coating and a preparation method thereof. The detailed technical scheme of the invention is as follows: The high-temperature-resistant heat-insulating paint comprises the following raw materials: 100-140 parts of organosilicon modified acrylic aqueous dispersion, 10-30 parts of modified hollow glass beads, 10-30 parts of curing agent, 5-10 parts of nano reflecting powder, 2-4 parts of auxiliary agent and 20-40 parts of water. The organosilicon modified acrylic acid aqueous dispersion is prepared by the following method: According to parts by mass, 100-125 parts of solvent is heated to 110-140 ℃ under the protection of nitrogen, 15-20 parts of glycidyl acrylate, 15-20 parts of methyl methacrylate, 15-20 parts of benzyl acrylate, 15-20 parts of acrylic acid and 1-2 parts of initiator are added into the solvent in a dropwise manner within 1-3h, 5-15 parts of dimethylphenylvinylsilane is added into the solvent within 5-15min after the dropwise addition is completed, 0.1-1 part of initiator is added, the mixture is reacted for 2-4h at 110-140 ℃ and 600-800rpm, the temperature is reduced to 60-80 ℃, 120-180 parts of water is added, the mixture is stirred for 5-10min at 600-800rpm, and diethanolamine is added to regulate pH=6-8, so that the organosilicon modified acrylic acid aqueous dispersion is obtained. The initiator is azodiisobutyronitrile. As a further explanation of the present invention, the aqueous silicone-modified acrylic dispersion can improve chemical properties by using glycidyl acrylate, methyl methacrylate, benzyl acrylate, acrylic acid as a mixed monomer to synthesize a polymer, wherein the benzyl acrylate molecular structure contains benzene rings to improve strength and im