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A kind of ultra-thin heat-resisting heat-resisting coating

A technology for thermal insulation coatings and high temperature resistance, which can be used in anti-corrosion coatings, anti-fouling/underwater coatings, radiation-absorbing coatings, etc. Small shrinkage coefficient, good chemical stability and high compressive strength

Active Publication Date: 2017-05-17
PINGXIANG TONG YU SPECIAL PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, my country's industrial high-temperature heating furnaces include hot-rolling heating furnaces, petrochemical heating furnaces, annealing furnaces, ceramic roller kilns, cement kilns, and tunnel kilns, etc., with a total of about 1 million units. At present, the outer surface of these high-temperature heating furnaces The temperature is high (200-250°C), and there are basically no insulation measures. The outer surface insulation of some heating furnaces is mostly made of inorganic coatings made of silicon carbide or zirconia with excellent refractory properties and water glass as a binder. To heat preservation, its main problem is; in order to improve the heat preservation performance, the coating layer must be at least 8 mm, and the spraying time and material cost are high; the second is that the aging speed of this inorganic coating is fast, and the coating is easy to crack and bubble. The radiation protection ability is not long-lasting, and the thermal insulation of the coating decreases rapidly

Method used

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  • A kind of ultra-thin heat-resisting heat-resisting coating
  • A kind of ultra-thin heat-resisting heat-resisting coating
  • A kind of ultra-thin heat-resisting heat-resisting coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, 180 parts of a mixture of special monomer-modified self-crosslinking acrylate copolymer and pure acrylic resin emulsion (each accounting for 50%), 20 parts of iron oxide red with a refractive index of 2.0 or more, 50-100 μm 65 parts of hollow ceramic microspheres, 2 parts of cerium oxide, 25 parts of additives (including 1 part of dispersant, 15 parts of film-forming aid, 2 parts of bactericide, 2 parts of ammonia water, and 5 parts of thickener) and 200 parts of purified water The above parts are all parts by weight. The special monomer-modified self-crosslinking acrylate copolymer is prepared by using ammonium methylol acrylate and acrylic acid as active monomers and using seed emulsion polymerization. First add water to the stirring tank by weight, then add the dispersant, suck the pigment and filler through the vacuum pump, stir and disperse for 45 minutes at a rotating speed (550 rpm) to make a slurry; then adjust the rotating speed of the stirring tank t...

Embodiment 2

[0028] Example 2, using 270 parts of a mixture of special monomer modified self-crosslinking acrylate copolymer and silica sol (acidic) (wherein the number of silica sol accounts for 30%), iron oxide red and titanium dioxide with a refractive index of 2.0 or more A total of 15 parts (each accounted for 50%), 55 parts of 100-250μm power plant drift beads, 3 parts of cerium oxide and yttrium oxide (including 2 parts of cerium oxide), 36 parts of additives (including 2 parts of dispersant, component 20 parts of film aid, 2 parts of bactericide, 2 parts of ammonia water, 10 parts of thickener) and 270 parts of purified water, the above parts are parts by weight, the special monomer modified self-crosslinking acrylate copolymer It is prepared by using methylol acrylic acid amide and acrylic acid as active monomers and using seed emulsion polymerization. First add water to the stirring tank by weight, then add the dispersant, suck the pigment and filler through the vacuum pump, stir...

Embodiment 3

[0031]Example 3, 100 parts of a mixture of special monomer-modified self-crosslinking acrylate copolymer, pure acrylic resin emulsion and lithium silicate (wherein the number of pure acrylic resin emulsion accounts for 20%, and the number of lithium silicate accounts for 30%) %), a total of 28 parts of iron oxide red and carbon black with a refractive index above 2.0 (each accounting for 50%), 100-250μm hollow glass microspheres and hollow ceramic microspheres 76 parts (each accounting for 50%), oxidation 1.5 parts of cerium and lanthanum oxide (including 1 part of cerium oxide), 15 parts of additives (including 2 parts of dispersant, 7 parts of film-forming aid, 1 part of bactericide, 2 parts of ammonia water, and 3 parts of thickener) and pure 120 parts of water, the above parts are all parts by weight. The special monomer modified self-crosslinking acrylate copolymer is prepared by using ammonium methylol acrylate and acrylic acid as active monomers and using seed emulsion p...

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Abstract

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.

Description

technical field [0001] The invention relates to an ultra-thin high-temperature-resistant thermal insulation coating mainly used in industrial heating furnaces. Background technique [0002] In 2013, petrochemical enterprises nationwide processed and refined 484 million tons of crude oil. There are basically three main stages in petroleum processing: atmospheric distillation, catalytic cracking and refinery gas processing. In order to make full use of crude oil resources and process heavy crude oil, modern oil refining has developed towards the direction of deep processing, that is, the use of catalytic cracking, hydrocracking, petroleum coking and other processes to obtain more light oil products from crude oil. In the cracking process, not only a large amount of fuel needs to be consumed, but also a large amount of greenhouse gases will be eliminated. How to improve the efficiency of the heating furnace has always been a prominent problem contradictory to the production ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/24C09D133/02C09D133/04C09D7/12C09D5/32C09D5/14C09D5/08C08F220/58C08F220/06
CPCC08F220/58C08K3/22C08K3/36C08K2003/2241C08K2003/2272C09D5/08C09D5/14C09D5/32C09D7/40C09D7/61C09D7/70C09D133/24C08L33/02C08K13/04C08K7/28C08K7/24C08K3/34C08K3/04C08F220/06Y02P20/10
Inventor 潜伟清
Owner PINGXIANG TONG YU SPECIAL PAINT
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