CN113429880A - Water-based modified organic silicon temperature-resistant coating and preparation method thereof - Google Patents
Water-based modified organic silicon temperature-resistant coating and preparation method thereof Download PDFInfo
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- CN113429880A CN113429880A CN202110836035.9A CN202110836035A CN113429880A CN 113429880 A CN113429880 A CN 113429880A CN 202110836035 A CN202110836035 A CN 202110836035A CN 113429880 A CN113429880 A CN 113429880A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K3/08—Metals
- C08K2003/0812—Aluminium
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Abstract
The invention relates to a water-based modified organic silicon temperature-resistant coating which comprises the following components in percentage by weight: 5.05 to 10.38 percent of deionized water, 0.5 to 1.0 percent of dispersant, 0.1 to 0.2 percent of defoaming agent, 0.3 to 0.6 percent of wetting and leveling agent, 0.1 to 0.2 percent of bactericide, 0.15 to 0.55 percent of base material wetting agent, 0.5 to 1.5 percent of flash rust inhibitor, 5.0 to 8.0 percent of water-based aluminum powder, 0.3 to 0.5 percent of organic bentonite, 0.15 to 0.25 percent of thickening agent, 2.0 to 3.5 percent of aluminum powder orientating agent, 10 to 15 percent of porous heat-insulating silicate and 50 to 70 percent of water-based organic silicon resin. The invention aims to solve or at least reduce the problems that the existing organosilicon temperature-resistant paint contains a large amount of volatile organic compounds and has poor high-temperature resistance, and provides a water-based modified organosilicon temperature-resistant coating and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based modified organic silicon temperature-resistant coating and a preparation method thereof.
Background
Along with the stricter and stricter requirements of national environmental protection policies, the requirements on emission control of volatile organic compounds are higher and higher, a lot of products need to be subjected to water-based treatment under new requirements, for example, the water-based treatment in the industries such as containers, steel structures and the like is mature, but the solvent-based organic silicon temperature-resistant paint (comprising acrylic acid modified organic silicon, epoxy modified organic silicon, pure organic silicon resin and the like) used in the fields such as silencers, tail gas pipes, engine parts, boilers, non-stick pans, drying ovens, chimney pipelines, picnic cookers, electric or gas furnaces, incinerators and the like still contains a large amount of volatile organic compounds, which causes great harm to the environment and coating workers, and research finds that the water-based treatment in the industry is insufficient and immature, and particularly the water-based treatment of the high-temperature-resistant paint is very urgent.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a water-based modified organic silicon temperature-resistant coating and a preparation method thereof, wherein the water-based modified organic silicon temperature-resistant coating is prepared by modifying water-based organic silicon resin by using porous heat-insulating silicate and compounding water-based aluminum powder. The principle is as follows: when an object to be coated runs at a high temperature, the porous heat-insulating silicate and the aluminum paste in a high-temperature molten state are fused to form a network interpenetrating Si-O-AL silicate inorganic compound, the network interpenetrating Si-O-AL silicate inorganic compound is deposited on the object to be coated like a plurality of closed cavities, the adhesive force to a bottom metal base is strong, the high-temperature resistance is good, the problem that the temperature resistance protection effect is reduced or lost after water-based organic silicon resin is cracked into gas and low-molecular-weight compounds at a certain temperature is relieved or compensated, and the problems that the existing solvent-based organic silicon temperature-resistant paint contains a large amount of volatile organic compounds and is poor in high-temperature resistance are solved or at least relieved.
The invention is realized by the following technical scheme:
the water-based modified organic silicon temperature-resistant coating comprises the following components in percentage by weight: 5.05 to 10.38 percent of deionized water, 0.5 to 1.0 percent of dispersant, 0.1 to 0.2 percent of defoaming agent, 0.3 to 0.6 percent of wetting and leveling agent, 0.1 to 0.2 percent of bactericide, 0.15 to 0.55 percent of base material wetting agent, 0.5 to 1.5 percent of flash rust inhibitor, 5.0 to 8.0 percent of water-based aluminum powder, 0.3 to 0.5 percent of organic bentonite, 0.15 to 0.25 percent of thickening agent, 2.0 to 3.5 percent of aluminum powder orienting agent, 10 to 15 percent of porous heat-insulating silicate and 50 to 70 percent of water-based organic silicon resin;
wherein, the dispersant is a copolymer with pigment nucleophilic groups, and has dispersion stabilization effect on aluminum powder;
the defoaming agent is an acetylene glycol defoaming agent, has good long-acting property and is not influenced by external physical conditions (such as shearing force);
the water-based aluminum powder is subjected to special coating treatment of silicon dioxide, so that the stability of a water-based system is ensured;
the base material wetting agent is a siloxane bi-surfactant, has good anti-shrinkage property and low foam stability, and can reduce the use of a defoaming agent in the paint mixing stage;
the aluminum powder orientating agent is nonionic ethylene-vinyl acetate copolymer wax emulsion, so that the problem of aluminum powder orientation arrangement is solved;
the water-based organic silicon resin is methyl phenyl modified organic silicon resin prepared by an emulsion polymerization method, wherein the proportion of methyl/phenyl of active groups of the resin is proper, and the heat resistance and the physical and mechanical properties are simultaneously considered;
the organic bentonite solves the thickening problem of the aqueous organic silicon resin system, the synergistic thickening agent solves the storage stability and water distribution problems, and the organic bentonite and the thickening agent act together to ensure the constructability and the storage stability of the whole system;
the porous heat-insulating silicate is roasted at the temperature of 800-1000 ℃ for 0.5-1min, the volume can be rapidly increased by 8-15 times and can reach 30 times, the color is changed into silvery white, a loose expanded substance is generated, the porous heat-insulating silicate has good performances of heat resistance, heat preservation, cold insulation, freezing prevention and sound insulation, and in addition, the porous heat-insulating silicate is fused with aluminum paste in a high-temperature molten state to generate a Si-O-AL silicate inorganic compound coating which is deposited on a coated object, so that the problem that the temperature resistance protection effect is reduced or lost after aqueous organic silicon resin is cracked into gas and low-molecular-weight compounds at a certain temperature is relieved or compensated.
In order to further implement the present invention, the following technical solutions may be preferably selected:
preferably, the composition comprises the following components in percentage by weight: 9% of deionized water, 0.75% of dispersing agent, 0.15% of defoaming agent, 0.45% of wetting and leveling agent, 0.15% of bactericide, 0.35% of base material wetting agent, 1.2% of anti-flash rust agent, 8% of waterborne aluminum powder, 0.5% of organic bentonite, 0.25% of thickening agent, 2.7% of aluminum powder orienting agent, 13.5% of porous heat-insulating silicate and 63% of waterborne organic silicon resin.
Preferably, the thickening agent is a high shear thickening agent in the nonionic polyurethane, and the ratio of the thickening agent to the organic bentonite is 1: 2.
A preparation method of a water-based modified organic silicon temperature-resistant coating comprises the following steps:
step 1) preparation of aqueous aluminum paste:
a. slowly adding part of deionized water into a mixing tank, adding a dispersing agent, a wetting and leveling agent and a defoaming agent under the stirring state of 300-400r/min, and then stirring at the speed of about 500r/min for dispersing for 10-30 min;
b. slowly adding the water-based aluminum powder under the stirring state of 200r/min, after wetting, increasing the speed to 300r/min for stirring, dispersing for 10-30min, stirring at low speed to avoid scattering flaky aluminum powder to influence the silver metal effect, then stopping stirring, sealing and infiltrating for 4 hours to obtain water-based aluminum paste;
step 2) preparation of modified organic bentonite aqueous jelly:
slowly adding part of deionized water into a mixing tank, adding the modified organic bentonite under the stirring state of 300r/min, then slowly increasing the speed to 1000r/min, stirring, dispersing for 10-30min, and stopping stirring until the mixture is in a colloid state to obtain a modified organic bentonite aqueous colloid;
step 3), preparation of the organic silicon temperature-resistant coating:
A. adding water-based organic silicon resin into a paint mixing tank, slowly adding a base material wetting agent, a bactericide, an anti-flash rust agent, an aluminum powder directing agent, porous heat insulation silicate and the modified organic bentonite water-based jelly prepared in the step 2) under the stirring state of 300r/min, slowly increasing the speed to 800r/min, stirring for 25-35min, reducing the speed to 300r/min, slowly adding the water-based aluminum paste prepared in the step 1), and uniformly stirring;
B. slowly adding thickener and deionized water under stirring at 300r/min, increasing speed to 500r/min, dispersing for 15-30min, adjusting viscosity, and filtering with 50 mesh filter cloth to obtain the final product.
Preferably, the viscosity of the finished product is 70-90 Ku.
Preferably, the ratio of the deionized water in the step 1), the step 2) and the step 3) is 20:1: 120.
Through the technical scheme, the invention has the beneficial effects that:
the invention is provided with a storage state and a use state;
the methyl and other groups in the water-based organic silicon resin in the components meet the requirement of excellent adhesive force on metals such as stainless steel, carbon steel and the like;
the aluminum powder orientation agent in the components meets the stability and orientation effect of the aluminum powder in the water-based system;
under the condition that the water-based organic silicon resin is compounded with the water-based aluminum powder and the porous silicate, the paint film does not fall off or crack under the high-temperature condition, and the performance of the paint film is not reduced;
the aqueous organic silicon resin in the components is prepared by emulsion polymerization, has good film forming property, does not need to add a film forming auxiliary agent, does not contain an organic solvent, does not actively add the organic solvent in the subsequent preparation process, and meets the requirements of organic volatile matters in the whole system and the construction state;
the existence of the water-based organic silicon resin methyl in the components meets certain weather aging resistance
After the water-based organic silicon resin in the components is formed into a film, the surface tension is extremely low, the hydrophobicity is very strong, and the water resistance is good;
the presence of the water-based silicone resin phenyl groups in the composition enhances the gasoline resistance of the paint film.
The water-based aluminum powder in the coating is oxidized into a compact and refractory alumina layer at high temperature, and in the oxidation-reduction reaction process, because a large amount of reaction is carried out between metal aluminum and oxygen near the surface of steel, active gas close to the coating is thin and cannot act with the surface of the steel, so that the coating plays a good role in protection.
More importantly, the volume of the porous heat-insulating silicate can be rapidly increased at the temperature of 800-.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the water-based modified organic silicon temperature-resistant coating comprises the following components in percentage by weight: 9% of deionized water, 0.75% of dispersing agent, 0.15% of defoaming agent, 0.45% of wetting and leveling agent, 0.15% of bactericide, 0.35% of base material wetting agent, 1.2% of anti-flash rust agent, 8% of waterborne aluminum powder, 0.5% of organic bentonite, 0.25% of thickening agent, 2.7% of aluminum powder orienting agent, 13.5% of porous heat-insulating silicate and 63% of waterborne organic silicon resin;
wherein, the dispersant is a copolymer with pigment nucleophilic groups, and has dispersion stabilization effect on aluminum powder;
the defoaming agent is an acetylene glycol defoaming agent, has good long-acting property and is not influenced by external physical conditions (such as shearing force);
the water-based aluminum powder is subjected to special coating treatment of silicon dioxide, so that the stability of a water-based system is ensured;
the base material wetting agent is a siloxane bi-surfactant, has good anti-shrinkage property and low foam stability, and can reduce the use of a defoaming agent in the paint mixing stage;
the aluminum powder orientating agent is nonionic ethylene-vinyl acetate copolymer wax emulsion, so that the problem of aluminum powder orientation arrangement is solved;
the water-based organic silicon resin is methyl phenyl modified organic silicon resin prepared by an emulsion polymerization method, wherein the proportion of methyl/phenyl of active groups of the resin is proper, and the heat resistance and the physical and mechanical properties are simultaneously considered;
the organic bentonite solves the thickening problem of the aqueous organic silicon resin system, the synergistic thickening agent solves the storage stability and water distribution problems, and the organic bentonite and the thickening agent act together to ensure the constructability and the storage stability of the whole system;
the porous heat-insulating silicate is roasted at the temperature of 800-1000 ℃ for 0.5-1min, the volume can be rapidly increased by 8-15 times and can reach 30 times, the color is changed into silvery white, a loose expanded substance is generated, the porous heat-insulating silicate has good performances of heat resistance, heat preservation, cold insulation, freezing prevention and sound insulation, in addition, the porous heat-insulating silicate and the aluminum silver paste in a high-temperature melting state are fused to form a network interpenetrating Si-O-AL silicate inorganic compound, the network interpenetrating Si-O-AL silicate inorganic compound is deposited on a coated object like a plurality of closed cavities, the adhesive force to a bottom layer metal base is strong, the high temperature resistance is good, and the problem that the temperature resistance protection effect is reduced or lost after the water-based organic silicon resin is cracked into gas and low molecular decomposer at a certain temperature is solved or compensated.
The thickening agent is a high shear thickening agent in nonionic polyurethane, and the ratio of the thickening agent to the organic bentonite is 1: 2.
Example 2:
example 2 is the same as example 1 and will not be repeated, except that: the water-based modified organic silicon temperature-resistant coating comprises the following components in percentage by weight: 9% of deionized water, 0.75% of dispersing agent, 0.15% of defoaming agent, 0.45% of wetting and leveling agent, 0.15% of bactericide, 0.35% of base material wetting agent, 1.2% of anti-flash rust agent, 5% of aqueous aluminum powder, 0.5% of organic bentonite, 0.25% of thickening agent, 2.7% of aluminum powder orienting agent, 10% of porous heat-insulating silicate and 69.5% of aqueous organic silicon resin.
Example 3:
example 3 is the same as example 1 and will not be repeated, except that: the water-based modified organic silicon temperature-resistant coating comprises the following components in percentage by weight: 9% of deionized water, 0.75% of dispersing agent, 0.15% of defoaming agent, 0.45% of wetting and leveling agent, 0.15% of bactericide, 0.35% of base material wetting agent, 1.2% of anti-flash rust agent, 8% of waterborne aluminum powder, 0.5% of organic bentonite, 0.25% of thickening agent, 2.7% of aluminum powder orienting agent, 15% of porous heat-insulating silicate and 61.5% of waterborne organic silicon resin.
Example 4:
a preparation method of a water-based modified organic silicon temperature-resistant coating comprises the following steps:
step 1) preparation of aqueous aluminum paste:
a. slowly adding part of deionized water into a mixing tank, adding a dispersing agent, a wetting and leveling agent and a defoaming agent under the stirring state of 300-400r/min, and then stirring at the speed of about 500r/min for dispersing for 10-30 min;
b. slowly adding the aqueous aluminum powder under the stirring state of 200r/min, after wetting, accelerating to the speed of 300r/min, stirring, dispersing for 10-30min, then stopping stirring, sealing and infiltrating for 4 hours to obtain aqueous aluminum paste;
step 2) preparation of modified organic bentonite aqueous jelly:
slowly adding part of deionized water into a mixing tank, adding the modified organic bentonite under the stirring state of 300r/min, then slowly increasing the speed to 1000r/min, stirring, dispersing for 10-30min, and stopping stirring until the mixture is in a colloid state to obtain a modified organic bentonite aqueous colloid;
step 3), preparation of the organic silicon temperature-resistant coating:
A. adding water-based organic silicon resin into a paint mixing tank, slowly adding a base material wetting agent, a bactericide, an anti-flash rust agent, an aluminum powder directing agent, porous heat insulation silicate and the modified organic bentonite water-based jelly prepared in the step 2) under the stirring state of 300r/min, slowly increasing the speed to 800r/min, stirring for 25-35min, reducing the speed to 300r/min, slowly adding the water-based aluminum paste prepared in the step 1), and uniformly stirring;
B. slowly adding thickener and deionized water under stirring at 300r/min, increasing speed to 500r/min, dispersing for 15-30min, adjusting viscosity to 70-90Ku, and filtering with 50 mesh filter cloth to obtain the final product.
The proportion of the deionized water in the step 1), the step 2) and the step 3) is 20:1: 120.
Example 5: technical index of coating
Example 6: heat resistance test of coating Material
The coating material of example 1, from which the aqueous aluminum powder, the aluminum powder aligning agent and the porous heat insulating silicate were removed, was used as a first group coating material, the coating material of example 1, from which the aqueous aluminum powder and the aluminum powder aligning agent were removed, was used as a second group coating material, the coating material of example 1, from which the porous heat insulating silicate was removed, was used as a third group coating material, the coating material of example 1, was used as a fourth group coating material, the coating material of example 2, the coating material of example 3, was used as a sixth group coating material, the six groups of coating materials were uniformly applied to six stainless steel plates 100mm by 100mm and 10mm thick, the six stainless steel plates to which the coating materials were applied were placed in six muffle furnaces, the six muffle furnaces were simultaneously heated, and the temperature of the six stainless steel plates for paint film falling and cracking was observed.
The results of the test according to this method are shown in the following table:
| paint set | Temperature (degree centigrade) at which the paint film comes off or cracks |
| First group of coating materials | 300 |
| Second group of paints | 570 |
| Third group of paints | 580 |
| Fourth group of paints | 820 |
| Fifth group of paints | 700 |
| Coating of the sixth group | 720 |
As can be seen from the table, the film cracking temperature of the first group of coating containing only the water-based organic silicon resin is lower, the film cracking temperature of the second group of coating containing the water-based organic silicon resin and the porous heat-insulating silicate and the film cracking temperature of the third group of coating containing the water-based organic silicon resin and the water-based aluminum powder are higher than the film cracking temperature of the first group of coating, and the film cracking temperature of the fourth group of coating containing the water-based organic silicon resin, the porous heat-insulating silicate and the water-based aluminum powder is far higher than the film cracking temperature of the first group of coating, so that the porous heat-insulating silicate and the water-based aluminum powder are compounded in a certain proportion in the components to form a network interpenetrating Si-O-AL silicate inorganic compound in a molten state, a plurality of closed cavities are deposited on a coated object, the adhesion to a bottom metal base.
Meanwhile, the film cracking temperatures of the fifth group of coating and the sixth group of coating are lower than the film cracking temperature of the fourth group of coating, so that when the components of the aqueous aluminum powder and the porous heat-insulating silicate in the coating are less or more, the film cracking temperature of the coating is improved, but the optimal effect cannot be achieved, and the film cracking temperature of the coating reaches the highest value due to the component proportion of the fourth group of coating.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The water-based modified organic silicon temperature-resistant coating is characterized by comprising the following components in percentage by weight: 5.05 to 10.38 percent of deionized water, 0.5 to 1.0 percent of dispersant, 0.1 to 0.2 percent of defoaming agent, 0.3 to 0.6 percent of wetting and leveling agent, 0.1 to 0.2 percent of bactericide, 0.15 to 0.55 percent of base material wetting agent, 0.5 to 1.5 percent of flash rust inhibitor, 5.0 to 8.0 percent of water-based aluminum powder, 0.3 to 0.5 percent of organic bentonite, 0.15 to 0.25 percent of thickening agent, 2.0 to 3.5 percent of aluminum powder orienting agent, 10 to 15 percent of porous heat-insulating silicate and 50 to 70 percent of water-based organic silicon resin;
wherein the dispersant is a copolymer with pigment nucleophilic groups;
the defoaming agent is an acetylene glycol defoaming agent;
the substrate wetting agent is siloxane dual surfactant;
coating the waterborne aluminum powder with silicon dioxide;
the aluminum powder orientation agent is nonionic ethylene-vinyl acetate copolymer wax emulsion;
the water-based organic silicon resin is methyl phenyl modified organic silicon resin prepared by an emulsion polymerization method.
2. The water-based modified organosilicon temperature-resistant coating as claimed in claim 1, which comprises the following components in percentage by weight: 9% of deionized water, 0.75% of dispersing agent, 0.15% of defoaming agent, 0.45% of wetting and leveling agent, 0.15% of bactericide, 0.35% of base material wetting agent, 1.2% of anti-flash rust agent, 8% of waterborne aluminum powder, 0.5% of organic bentonite, 0.25% of thickening agent, 2.7% of aluminum powder orienting agent, 13.5% of porous heat-insulating silicate and 63% of waterborne organic silicon resin.
3. The water-based modified organosilicon temperature-resistant coating as claimed in claim 1, wherein the thickener is a non-ionic polyurethane medium-high shear thickener, and the ratio of the thickener to the organobentonite is 1: 2.
4. A preparation method of a water-based modified organic silicon temperature-resistant coating is characterized by comprising the following steps:
step 1) preparation of aqueous aluminum paste:
a. slowly adding part of deionized water into a mixing tank, adding a dispersing agent, a wetting and leveling agent and a defoaming agent under the stirring state of 300-400r/min, and then stirring at the speed of about 500r/min for dispersing for 10-30 min;
b. slowly adding the aqueous aluminum powder under the stirring state of 200r/min, after wetting, accelerating to the speed of 300r/min, stirring, dispersing for 10-30min, then stopping stirring, sealing and infiltrating for 4 hours to obtain aqueous aluminum paste;
step 2) preparation of modified organic bentonite aqueous jelly:
slowly adding part of deionized water into a mixing tank, adding the modified organic bentonite under the stirring state of 300r/min, then slowly increasing the speed to 1000r/min, stirring, dispersing for 10-30min, and stopping stirring until the mixture is in a colloid state to obtain a modified organic bentonite aqueous colloid;
step 3), preparation of the organic silicon temperature-resistant coating:
A. adding water-based organic silicon resin into a paint mixing tank, slowly adding a base material wetting agent, a bactericide, an anti-flash rust agent, an aluminum powder directing agent, porous heat insulation silicate and the modified organic bentonite water-based jelly prepared in the step 2) under the stirring state of 300r/min, slowly increasing the speed to 800r/min, stirring for 25-35min, reducing the speed to 300r/min, slowly adding the water-based aluminum paste prepared in the step 1), and uniformly stirring;
B. slowly adding thickener and deionized water under stirring at 300r/min, increasing speed to 500r/min, dispersing for 15-30min, adjusting viscosity, and filtering with 50 mesh filter cloth to obtain the final product.
5. The preparation method of the water-based modified organosilicon temperature-resistant coating as claimed in claim 4, wherein the viscosity of the finished product is 70-90 Ku.
6. The preparation method of the water-based modified organosilicon temperature-resistant coating according to claim 4, wherein the ratio of the deionized water in the steps 1), 2) and 3) is 20:1: 120.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115595059A (en) * | 2022-09-20 | 2023-01-13 | 哈尔滨工业大学（Cn） | Preparation method of green fireproof coating |
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