CN112980220A - Preparation method and application of low-oil-absorption high-temperature-resistant iron oxide coating - Google Patents
Preparation method and application of low-oil-absorption high-temperature-resistant iron oxide coating Download PDFInfo
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- CN112980220A CN112980220A CN202011338475.3A CN202011338475A CN112980220A CN 112980220 A CN112980220 A CN 112980220A CN 202011338475 A CN202011338475 A CN 202011338475A CN 112980220 A CN112980220 A CN 112980220A
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- 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
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- 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
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Abstract
The invention relates to the technical field of iron oxide coatings, in particular to a preparation method and application of a low-oil-absorption high-temperature-resistant iron oxide coating. After treatment, the iron oxide coating has a good dispersion effect, so that the iron oxide coating has the characteristic of low oil absorption, and also has high temperature resistance and is convenient to popularize and use.
Description
Technical Field
The invention relates to the technical field of iron oxide coatings, in particular to a preparation method and application of a low-oil-absorption high-temperature-resistant iron oxide coating.
Background
The iron oxide pigment is a pigment having good dispersibility and excellent light and weather resistance. The iron oxide pigment mainly refers to four types of colored pigments of iron oxide red, iron yellow, iron black and iron brown based on iron oxide, wherein iron oxide red is the main (about 50% of the iron oxide pigment), mica iron oxide used as a rust preventive pigment and magnetic iron oxide used as a magnetic recording material also belong to the category of iron oxide pigments. Iron oxide is the second largest inorganic pigment next to titanium dioxide, and is also the first largest colored inorganic pigment. Of the total consumer iron oxide pigments, more than 70% are prepared by chemical synthesis and are referred to as synthetic iron oxides. The synthesized iron oxide has high synthesis purity, uniform and regular particle size, wide color spectrum, multiple colors, low price, no toxicity, excellent coloring and application performance, ultraviolet absorption performance and the like.
At present, the demand of the domestic coating industry on iron oxide coatings is gradually increased year by year, but most of the existing iron oxide coatings have high oil absorption, so that the development of the industry is adversely affected, and therefore, a preparation method and application of a high-temperature-resistant iron oxide coating with low oil absorption are required to be designed to solve the problems.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the preparation method of the low-oil-absorption high-temperature-resistant iron oxide coating comprises the following steps of mixing, pulping, dispersing, filter pressing, washing, drying and crushing.
Dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 15-30%;
step 3, adding 25-35% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 650-850 rpm;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing;
and 5, re-pulping the filter cake, adding a dispersing agent, adjusting the concentration of the slurry to 10-20%, starting a paddle for dispersing, drying in a disc mode, and crushing in a vertical mode to obtain the high-temperature-resistant iron oxide coating with low oil absorption.
Preferably, the alkali liquor is potassium hydroxide solution.
Preferably, the pH value of the alkali liquor and the dispersing agent is adjusted to 8.0-9.0 and stabilized at 8.0-9.0, and then the reaction is carried out for 30-40 min.
Preferably, the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4 to 3.6 to 3.2.
Preferably, the heating temperature of the high-temperature reaction kettle is 50-100 ℃.
Preferably, the dispersant is added in step 5 in an amount of 0.5 to 3.0 based on the total weight of the iron oxide.
Preferably, the high-temperature resistant iron oxide coating with low oil absorption is mainly applied to color cement, color cement floor tiles, imitated glazed tiles, artificial marble, wall whitewashing and the like in the building material industry; in the coating and paint industry, the paint is mainly used for manufacturing various paints and inks; in other industries, such as ceramics, rubber, plastics, etc., are used as colorants and fillers.
Compared with the prior art, the invention has the beneficial effects that: compared with the seven preparation methods of the high-temperature-resistant iron oxide coating with low oil absorption, the seven preparation methods can achieve a good low oil absorption effect, wherein the treatment time of the first embodiment is the fastest, but the dispersion effect of the iron oxide coating is slightly reduced, the treatment time of the seventh embodiment is the longest, but the dispersion effect of the iron oxide coating is better, so that the dispersion degree of the iron oxide coating is improved, and the iron oxide coating has the characteristic of low oil absorption, and meanwhile, the high-temperature-resistant iron oxide coating is high in temperature resistance and convenient to popularize and use.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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.
A low oil absorption high temperature resistant ferric oxide coating preparation method and application, the low oil absorption high temperature resistant ferric oxide coating synthesis method adopts mixing, pulping, dispersing, filter pressing, washing, drying and crushing, including the following steps,
dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 15-30%;
step 3, adding 25-35% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 650-850 rpm;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing;
and 5, re-pulping the filter cake, adding a dispersing agent, adjusting the concentration of the slurry to 10-20%, starting a paddle for dispersing, drying in a disc mode, and crushing in a vertical mode to obtain the high-temperature-resistant iron oxide coating with low oil absorption.
Further, the alkali liquor is potassium hydroxide solution.
Further, adjusting the pH value of the alkali liquor and the dispersing agent to 8.0-9.0 and stabilizing the pH value to 8.0-9.0, and then reacting for 30-40 min.
Further, the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4 to 3.6 to 3.2.
Further, the heating temperature of the high-temperature reaction kettle is 50-100 ℃.
Further, the addition amount of the dispersing agent in the step 5 is 0.5-3.0 of the total weight of the ferric oxide.
Furthermore, the application of the high-temperature resistant iron oxide coating with low oil absorption is mainly used for colored cement, colored cement floor tiles, imitated glazed tiles, artificial marble, wall whitewashing and the like in the building material industry; is mainly used for manufacturing various paints and printing inks in the coating and painting industry; in other industries, such as ceramics, rubber, plastics, etc., are used as colorants and fillers.
The first embodiment;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 15%;
step 3, adding 25% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 650rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 8.0 and stabilizing the pH value to 8.0, and then reacting for 30min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 50 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent accounting for 0.5 percent of the total weight of the iron oxide, adjusting the concentration of the slurry to 10 percent, starting a paddle to disperse, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using a vertical crushing device.
The integral processing time is short, and the oil absorption of the iron oxide coating can reach 20-22 percent
Example two;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 20%;
step 3, adding 25% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 650rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 8.2 and stabilizing the pH value to 8.2, and then reacting for 35min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 60 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent accounting for 0.9 percent of the total weight of the iron oxide, adjusting the concentration of the slurry to be 12 percent, starting a paddle to disperse, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using a vertical crushing device.
After processing, the oil absorption of the iron oxide coating can reach 21-23%.
Example three;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 20%;
step 3, adding 30% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 700rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 8.5 and stabilizing the pH value to 8.5, and then reacting for 32min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 60 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent accounting for 1.0 percent of the total weight of the iron oxide, adjusting the concentration of the slurry to be 14 percent, starting a paddle to disperse, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using a vertical crushing device.
After processing, the oil absorption of the iron oxide coating can reach 23%.
Example four;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 23%;
step 3, adding 27% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 720rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 8.6 and stabilizing the pH value to 8.6, and then reacting for 38min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 80 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent accounting for 2.0 percent of the total weight of the iron oxide, adjusting the concentration of the slurry to be 17 percent, starting a paddle to disperse, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using a vertical crushing device.
After processing, the oil absorption of the iron oxide coating can reach 25%.
Example five;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 25%;
step 3, adding 25% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 730rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 8.3 and stabilizing the pH value to 8.3, and then reacting for 37min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 75 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent accounting for 1.8 percent of the total weight of the iron oxide, adjusting the concentration of the slurry to 13 percent, starting a paddle to disperse, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using a vertical crushing device.
After processing, the oil absorption of the iron oxide coating can reach 27 percent.
Example six;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 28%;
step 3, adding 30% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 800rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 8.8 and stabilizing the pH value to 8.8, and then reacting for 38min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 90 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent accounting for 2.6 percent of the total weight of the iron oxide, adjusting the concentration of the slurry to 18 percent, starting a paddle to disperse, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using a vertical crushing device.
After processing, the oil absorption of the iron oxide coating can reach 25-27%.
Example seven;
step 1, dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C, wherein the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 30%;
step 3, adding 35% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 850rpm, adjusting the pH value of the alkali liquor and the dispersing agent to 9.0 and stabilizing the pH value to 9.0, and then reacting for 40min, wherein the alkali liquor is a potassium hydroxide solution;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing, wherein the heating temperature of the high-temperature reaction kettle is 100 ℃;
and 5, re-pulping the filter cake, adding a dispersing agent with the total weight of ferric oxide of 3.0, adjusting the concentration of the slurry to be 20%, starting a paddle to disperse, performing disc drying, and performing vertical crushing to obtain the high-temperature-resistant ferric oxide coating with low oil absorption.
The dispersion degree of the iron oxide coating is improved through processing treatment, so that the oil absorption of the iron oxide coating can reach 26-30%.
Compared with the seven preparation methods of the high-temperature-resistant iron oxide coating with low oil absorption, the seven preparation methods can achieve good low oil absorption effect, wherein the treatment time of the first embodiment is the fastest, but the dispersion effect of the iron oxide coating is slightly reduced, the treatment time of the seventh embodiment is the longest, but the dispersion effect of the iron oxide coating is better, so that the dispersion degree of the iron oxide coating is improved, the iron oxide coating has the characteristic of low oil absorption, and meanwhile, the high-temperature-resistant iron oxide coating is high in temperature resistance and convenient to popularize and use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A preparation method of a high-temperature resistant iron oxide coating with low oil absorption is characterized by comprising the following steps: the synthesis method of the low oil absorption high temperature resistant ferric oxide coating comprises the following steps of mixing, pulping, dispersing, filter pressing, washing, drying and crushing,
dissolving soluble alkaline earth metal salt in water to prepare a solution A, dissolving ferrous nitrate in water to prepare a solution B, and dissolving sodium hexametaphosphate in water to prepare a solution C;
step 2, putting the ferric oxide, the solution A, the solution B and the solution C into a barrel, adding water, and pulping to prepare slurry with the mass concentration of 15-30%;
step 3, adding 25-35% alkali liquor and a dispersing agent into the slurry under the high-speed dispersion action of 650-850 rpm;
step 4, drying a filter cake in a high-temperature reaction kettle after filter pressing and washing;
and 5, re-pulping the filter cake, adding a dispersing agent, adjusting the concentration of the slurry to 10-20%, starting a paddle for dispersing, drying in a disc mode, and preparing the high-temperature-resistant iron oxide coating with low oil absorption by using vertical crushing equipment.
2. The method for preparing the high temperature resistant iron oxide coating with low oil absorption according to claim 1, wherein the method comprises the following steps: the alkali liquor is potassium hydroxide solution.
3. The method for preparing the high temperature resistant iron oxide coating with low oil absorption according to claim 1, wherein the method comprises the following steps: and adjusting the pH value of the alkali liquor and the dispersing agent to be 8.0-9.0 and stabilizing the pH value to be 8.0-9.0, and then reacting for 30-40 min.
4. The method for preparing the high temperature resistant iron oxide coating with low oil absorption according to claim 1, wherein the method comprises the following steps: the mixing ratio of the soluble alkaline earth metal salt, the ferrous nitrate and the sodium hexametaphosphate is 4: 3.6: 3.2.
5. The method for preparing the high temperature resistant iron oxide coating with low oil absorption according to claim 1, wherein the method comprises the following steps: the heating temperature of the high-temperature reaction kettle is 50-100 ℃.
6. The method for preparing the high temperature resistant iron oxide coating with low oil absorption according to claim 1, wherein the method comprises the following steps: the addition amount of the dispersant in the step 5 is 0.5 to 3.0 percent of the total weight of the ferric oxide.
7. The use of the low oil absorption high temperature resistant iron oxide coating according to claim 1 in construction industry, mainly for color cement, color cement floor tile, imitation glazed tile, artificial marble, wall plastering, etc.; is mainly used for manufacturing various paints and printing inks in the coating and painting industry; in other industries, such as ceramics, rubber, plastics, etc., are used as colorants and fillers.
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| CN102604438A (en) * | 2012-02-21 | 2012-07-25 | 升华集团德清华源颜料有限公司 | Iron oxide yellow pigment with low oil absorption |
| CN104071850A (en) * | 2013-03-25 | 2014-10-01 | 北京三聚环保新材料股份有限公司 | Preparation method for iron oxide black |
| CN107033656A (en) * | 2017-05-02 | 2017-08-11 | 湖州师范学院 | A kind of heat resistant type ferric oxide yellow pigment and preparation method thereof |
| CN107090195A (en) * | 2017-05-02 | 2017-08-25 | 湖州师范学院 | A kind of easy dispersing iron oxide yellow pigment of heat resistant type and preparation method thereof |
| CN111909541A (en) * | 2020-08-26 | 2020-11-10 | 湖州思源颜料有限公司 | Preparation method of iron oxide yellow pigment with ultralow oil absorption |
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2020
- 2020-11-25 CN CN202011338475.3A patent/CN112980220A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604438A (en) * | 2012-02-21 | 2012-07-25 | 升华集团德清华源颜料有限公司 | Iron oxide yellow pigment with low oil absorption |
| CN104071850A (en) * | 2013-03-25 | 2014-10-01 | 北京三聚环保新材料股份有限公司 | Preparation method for iron oxide black |
| CN107033656A (en) * | 2017-05-02 | 2017-08-11 | 湖州师范学院 | A kind of heat resistant type ferric oxide yellow pigment and preparation method thereof |
| CN107090195A (en) * | 2017-05-02 | 2017-08-25 | 湖州师范学院 | A kind of easy dispersing iron oxide yellow pigment of heat resistant type and preparation method thereof |
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