CN1254737A - High-temp. anticorrosion paint - Google Patents
High-temp. anticorrosion paint Download PDFInfo
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- CN1254737A CN1254737A CN 99103351 CN99103351A CN1254737A CN 1254737 A CN1254737 A CN 1254737A CN 99103351 CN99103351 CN 99103351 CN 99103351 A CN99103351 A CN 99103351A CN 1254737 A CN1254737 A CN 1254737A
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- potassium silicate
- coating
- silicate solution
- solution
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- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
A high-temp dual-component anticorrosion water-base inorganic paint and its preparing process are disclosed. The component A is prepared through selecting potassium silicate solution, stirring, adding lithium hydroxide in the condition of stable vortex, continue stirring,dropping CH3Si(OCH3)3, hydrolysis, and adding water and CaSiO3. The component B is Al2O3 powder. The weight ratio of components A to B is (1-5) : 1. Said paint can be used as protecting coating of iron and steel structure and has the advantages of no environmental pollution, high temp resistance up to 1000 deg.C, high anticorrosion and antiwear nature, and high adhesion to substrate.
Description
The present invention relates to water base high-temperature resistant coating of a kind of inorganic two-component and manufacture method thereof.
Along with the continuous progress of inorganic anti-corrosion paint area research, its range of application is more and more wider.The excellent properties of inorganic silicate coating is determined by its silicon self-characteristic.Siliciumatom can and filler and protected metal between form " Si-O " key, constitute fine and close, coating efficiently.This coating has pollution-free, and is ageing-resistant, hardness height, characteristic such as corrosion-resistant and do not fire.Therefore, it comprises that at some special dimensions the application in high temperature resistant field also becomes important research project.
Now, most widely used in high-temperature resistant coating is organosilicon coating.It is to add heat-resistant filler and other auxiliary film forming material compositions in based on the base-material of silicone resin or modified organic silicone resin.Heat-resistant filler is commonly used titanium dioxide, zinc oxide, aluminium powder etc.The principal feature of this kind coating is: can work steadily in the long term under 400 ℃, water tolerance, electrical insulating property are good.But hardness is low, and flame resistivity is poor, the price height, and coating is weightless serious when temperature surpasses 450 ℃, and this mainly is that side chain and main chain organic radical are destroyed because violent thermolysis takes place organic composition in the coating, finally causes coating to lose efficacy.And owing to contain more organic composition, in production and use, easily pollute, destroy environment, threaten production and user of service's health, so the use range of this coating is restricted.
But this just needs the inorganic anti-corrosion paint of a kind of pollution-free, high temperature resistant and long term operation of research.
The purpose of this invention is to provide a kind of self cure, high temperature resistant, corrosion-resistant, anti abrasive silicate coating and preparation method.
In the present invention, provide a kind of high temperature resistant and antiseptic property is outstanding, easy construction, pollution-free, stable and the coating and the manufacture method that are easy to preserve.
According to the present invention, provide a kind of inorganic two-component water base high-temperature resistant coating, this coating comprises component 1 and component 2, it is characterized in that, component 1 prepares by following step: choose potassium silicate solution, keep 35 ℃-70 ℃ of temperature, stir described potassium silicate solution, under the stable condition of its vortex, add gross weight than being the lithium hydroxide of 0.2-2%, obtain transparent heavy-gravity solution; In 1-1.5 hour, splash into the CH that weight ratio is described potassium silicate solution 0.2%-20%
3Si (OCH
3)
3, make its hydrolysis; Add gross weight than for the water of 2-10% and gross weight than being the CaSiO of 5-15%
3Component 2 is Al
2O
3Powder; Wherein, component 1 is 5: 1～1: 1 with the weight ratio of component 2.
According to the present invention, a kind of method for preparing the water base high temperature resistant zinc silicon coating of inorganic two-component also is provided, component 1 is preparation like this: choose potassium silicate solution, keep 35 ℃-70 ℃ of temperature, stir described potassium silicate solution, under the stable condition of its vortex, add gross weight than being the lithium hydroxide of 0.2-2%, obtain transparent heavy-gravity solution; In 1-1.5 hour, splash into the CH that weight ratio is described potassium silicate solution 0.2%-20%
3Si (OCH
3)
3, make its hydrolysis; Add gross weight than for the water of 2-10% and gross weight than being the CaSiO of 5-15%
3Component 2 is Al
2O
3Powder.Then component 2 is joined in the component 1, evenly stir.
SiO in the potassium silicate aqueous solution that uses among the present invention
2With K
2The mol ratio of O is 4.8～5.6, and the potassium silicate modulus of selecting for use should be high as far as possible, because SiO
2With K
2The ratio of O mole is high more, and then final coating is not easy molten water more, and promptly the water resisting property of coating is good more, coating voluntarily set time short more, the temperature tolerance of coating is good more.And can shorten the reaction times, improve preparation efficiency.Must guarantee has enough solids contents in the potassium silicate solution, is generally 18-26% and crosses when low when solids content, and reaction can't be carried out.
The present invention has also used the modification technology of aqueous silicate solution.The coating that common aqueous silicate solution forms is crisp, poor with substrate adhesion, easy to crack.In the present invention, handle double salt and the complicated complex compound that potassium silicate aqueous solution at high proportion becomes silicate, improved the bonding force with matrix, and improved the toughness and the water tolerance of coating by modification.
Earlier pour potassium silicate aqueous solution into stirred vessel, in reaction process, stirring is necessary.Mixing speed is fast more, and then reaction process will shorten, and can select high rotating speed, for example about 1500rpm, still will guarantee that solution does not overflow.No matter select what rotating speed, all to keep the stable of vortex.
When potassium silicate aqueous solution begins to stir, should improve the temperature of solution, experiment shows that improving temperature can fast reaction speed.Can make solution temperature be controlled at 35 ℃-70 ℃, good more near 70 ℃ more, but not above 75 ℃.Along with the rising and the stirring of temperature, vortex begins to expand outwardly, and at this moment should adjust rotating speed, keeps vortex stable.Add the lithium hydroxide pressed powder subsequently, solution does not have considerable change.The add-on of lithium hydroxide can not be too many, otherwise can reduce the modulus of final solution.
React completely carry out after, obtain transparent, the viscous solution of look slightly.
Next step is to splash into monomethyl Trimethoxy silane CH
3Si (OCH
3)
3, it is 1% that the consumption minimum accounts for the gross weight ratio, as many as 20% also can, but price is the factor that must consider.Add fashionable must slowly splashing into, make its abundant hydrolysis.The solution that makes continues to keep vortex, about 1.5 hours, guarantee that time enough makes organosilicon hydrolyzation.Add gross weight again than being the water of 0-10% and 5-15% wollastonite (CaSiO
3), thorough mixing stirs, and churning time is long more, and reaction is carried out abundant more, generally needs to stir more than 3 hours, and component 1 of the present invention is promptly made, again with suitable proportion blending ingredients 2, as the Al of high temperature resistant filler
2O
3Powder, the present invention can finish.
Component 1 by the coating of above-mentioned technological process manufacturing is the potassium silicate aqueous solution at high proportion and the CaSiO of after chemical reaction modification
3Complex compound.Al
2O
3The powder add-on can be calculated out by the solids content behind the dried coating film, and is promptly only relevant with solids content.Al
2O
3The granularity of powder is 0.3-2.0 μ m
Be an example of describing whole process in detail below.Make 1,000g component 1, SiO in the initial potassium silicate aqueous solution
2With K
2The mol ratio of O is 5.1 approximately, and solid content is 23%.
1: weigh the initial potassium silicate solution of 679g.
2: weigh the 20g lithium hydroxide aqueous solution.
3: weigh 25g CH
3Si (OCH
3)
3
4: weigh 58g water.
5: weigh 128g wollastonite (CaSiO
3).
6: pour potassium silicate solution into reactor, begin to stir, rotating speed 1,500rpm forms vortex.Simultaneously, keep 35 ℃ of solution temperatures.
7: lithium hydroxide solution is slowly added reactor, and rotating speed can suitably increase, but solution is overflowed.
8: improve temperature to 70 ℃, and keep temperature, improve rotating speed, keep vortex.React fully and carry out, about one hour.
9: add CH
3Si (OCH
3)
3, for making its complete hydrolysis, must as far as possible slowly add, generally continue 30 minutes.
10: slowly splash into water, adjust rotating speed, keep vortex.
11: keep temperature, continue 1.5 hours.Rotating speed can increase slightly.Obtain colourless, till the clear solution.
12; Add wollastonite, fully stirred 30 minutes, rotating speed suitably slows down.
13: the solution that obtains is poured out, and canned, component 1 of the present invention promptly prepares to be finished.
14: reactor bottom has a little precipitation, its quantity what with adding raw material the impurity and the content of insolubles relevant.
May be less than 1 slightly, 000g by the prepared solution of aforesaid operations.Add filler and pigment after at 1: 1 but press, can obtain than 1 the more coating of 000g.
Be to cite an actual example again to describe whole process in detail below.Make 1,000g component 1 solution, SiO in the initial potassium silicate aqueous solution
2With K
2The mol ratio of O is 5.3 approximately, solids content 22%.
1: weigh the initial potassium silicate solution of 820g.
2: weigh the 20g lithium hydroxide aqueous solution.
3: weigh 35g CH
3Si (OCH
3)
3
4: weigh 10g water.
5: weigh 115g wollastonite (CaSiO
3).
6: pour potassium silicate solution into reactor, begin to stir, rotating speed 1,500rpm forms vortex.Simultaneously, keep 35 ℃ of solution temperatures.
7: lithium hydroxide solution is slowly added reactor, and rotating speed can suitably increase, but solution is overflowed.
8: improve temperature to 70 ℃, and keep temperature, improve rotating speed, keep vortex.React fully and carry out, about one hour.
9: add CH
3Si (OCH
3)
3, for making its complete hydrolysis, must as far as possible slowly add, generally continue 30 minutes.
10: slowly splash into water, adjust rotating speed, keep vortex.
11: keep temperature, continue 1.5 hours.Rotating speed can increase slightly.Obtain colourless, till the clear solution.
12; Add wollastonite, fully stirred 30 minutes, rotating speed suitably slows down.
13: the solution that obtains is poured out, and canned, component 1 of the present invention promptly prepares to be finished.
14: reactor bottom has a little precipitation, its quantity what with adding raw material the impurity and the content of insolubles relevant.
May be less than 1 slightly, 000g by the prepared solution of aforesaid operations.But by component 1: component 2 is to add filler and pigment after at 4: 1, can obtain than 1 the more coating of 000g.
Claims (8)
1, the water base fire-resistant anticorrosion paint of a kind of inorganic two-component, this coating comprises component 1 and component 2, it is characterized in that, component 1 prepares by following step:
(1) chooses potassium silicate solution, keep 35 ℃-70 ℃ of temperature, stir described potassium silicate solution, under the stable condition of its vortex, add gross weight, obtain transparent heavy-gravity solution than being the lithium hydroxide of 0.2-2%;
(2) in 1-1.5 hour, splash into the CH that weight ratio is described potassium silicate solution 0.5%-20%
3Si (OCH
3)
3, make its hydrolysis;
(3) add gross weight than for the water of 2-10% and gross weight than being the CaSiO of 5-15%
3
Component 2 is Al
2O
3Powder;
Wherein, component 1 is 5: 1～1: 1 with the weight ratio of component 2.
2, coating as claimed in claim 1 is characterized in that, in the described potassium silicate solution, and SiO
2With K
2The mole of O is 4.8～5.6, and solids content is 18-26%.
3, coating as claimed in claim 1 is characterized in that, described lithium hydroxide is a pressed powder.
4, coating as claimed in claim 1 is characterized in that, described Al
2O
3The powder degree is 0.3-2 μ m.
5, a kind of method for preparing the water base zinc silicon coating of inorganic two-component comprises:
-preparation component 1:
(1) choose potassium silicate solution, keep 35 ℃-70 ℃ of temperature, stir described potassium silicate solution, it is more described than the lithium hydroxide for 0.2-2% to add gross weight under the stable condition of its vortex, obtains transparent heavy-gravity solution;
(2) in 1-1.5 hour, splash into the CH that weight ratio is described potassium silicate solution 0.5%-20%
3Si (OCH
3)
3, make its hydrolysis;
(3) add gross weight than for the water of 2-10% and gross weight than being the CaSiO of 5-15%
3
-component 2 is added in the component 1, wherein component 2 is Al
2O
3Powder;
6, method as claimed in claim 5 is characterized in that, in the described potassium silicate solution, and SiO
2With K
2The mol ratio of O is 4.8～5.3, and solids content is 18-26%.
7, method as claimed in claim 5 is characterized in that, described lithium hydroxide is a pressed powder.
8, method as claimed in claim 5 is characterized in that, described Al
2O
3The powder degree is 0.3-2 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99103351A CN1074440C (en) | 1999-03-16 | 1999-03-16 | High-temp. anticorrosion paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99103351A CN1074440C (en) | 1999-03-16 | 1999-03-16 | High-temp. anticorrosion paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1254737A true CN1254737A (en) | 2000-05-31 |
| CN1074440C CN1074440C (en) | 2001-11-07 |
Family
ID=5271240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99103351A Expired - Fee Related CN1074440C (en) | 1999-03-16 | 1999-03-16 | High-temp. anticorrosion paint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074440C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971137B (en) * | 2005-11-22 | 2010-06-02 | 上海洁申实业有限公司 | Anti-corrosion method for smoke funnel in burning system |
| CN104341137A (en) * | 2012-11-09 | 2015-02-11 | 普莱克斯S.T.技术有限公司 | Chromium-free silicate-based ceramic compositions |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182105A (en) * | 1996-11-13 | 1998-05-20 | 谈嘉骏 | Self-curing zinc-rich paint capable of being painted on rusted surface of steel products and its preparation |
| CN1091125C (en) * | 1997-03-11 | 2002-09-18 | 钱宗渊 | Inorganic coating adhesive |
-
1999
- 1999-03-16 CN CN99103351A patent/CN1074440C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971137B (en) * | 2005-11-22 | 2010-06-02 | 上海洁申实业有限公司 | Anti-corrosion method for smoke funnel in burning system |
| CN104341137A (en) * | 2012-11-09 | 2015-02-11 | 普莱克斯S.T.技术有限公司 | Chromium-free silicate-based ceramic compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1074440C (en) | 2001-11-07 |
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Effective date of registration: 20051216 Address after: 100027 worker's Stadium, Beijing, Chaoyang District, 21 Patentee after: Beijing Benzema New Technology Co Ltd Address before: 100026 Beijing City, Chaoyang District Jintai Road No. 2 building 211 new machine Institute 2 Patentee before: Cui Yue |
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