CN1325578C - Mixed silicon sol water inorganic zinc enriching paint - Google Patents
Mixed silicon sol water inorganic zinc enriching paint Download PDFInfo
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- CN1325578C CN1325578C CNB031291317A CN03129131A CN1325578C CN 1325578 C CN1325578 C CN 1325578C CN B031291317 A CNB031291317 A CN B031291317A CN 03129131 A CN03129131 A CN 03129131A CN 1325578 C CN1325578 C CN 1325578C
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Abstract
The present invention discloses mixed silicon sol water inorganic zinc enriching paint. The paint is prepared from component A and component B, wherein the component A is prepared from 80% to 100% of zinc powder, 0 to 0.85% of thickening agent and 0 to 20% of filler; the component B is prepared from 78.0% to 88.0% of mixed silicon sol, 0 to 3.0% of deposition resistant agent, 8.2% to 16.0% of emulsion, 0 to 0.25% of surfactant and 0 to 3.55% of other auxiliary agents. The salt-fog resistant time of a coating layer is up to 10000 hours and the artificial accelerated ageing resistant time is up to 10000 hours; the coating layer is waterproof after the surface of the coating layer is dried and has the characteristic of continuous solidification in moist environment. The paint is suitable for the long acting anticorrosive coating engineering of steel, and the anticorrosive time can be up to 50 years; a normal temperature and pressure technology is used for the paint, and the energy consumption and the preparation cost is low; the paint has no byproducts, three wastes or volatile organic substances in the whole preparation process and has no pollution to environment.
Description
Technical field
The present invention relates to a kind of zinc-rich paint, particularly a kind of is the aqueous inorganic zinc-enriched coating of main binding agent with silicon sol.
Background technology
Large-scale steel structure building and industrial plants have very high requirement to the protection against corrosion of iron and steel, especially for some engineering projects that is difficult to keep in repair, require to use to have the many decades long-lasting protection coatings of working life.Aqueous inorganic zinc-enriched coating is as a kind ofly being applied in the harsh relatively corrosive environment, can having more long-term provide protection and with its good corrosion resistance than conventional coating; safety non-toxic, do not fire not quick-fried; environmentally safe; meet " safety, health, environmental protection " this coating developing direction, just more and more be subject to people's attention.Entered since the nineties in last century, the research of aqueous inorganic zinc-enriched coating just towards further raising Corrosion Protection, cut down the consumption of energy, zero VOC discharging, construction more easily direction develop.
Over nearly 40 years, it is the scope of binding agent that the research and development of aqueous inorganic zinc-enriched coating both at home and abroad mainly concentrates on silicate.The sixties in last century Shanghai coating industry just begins aqueous inorganic zinc-enriched coating is studied, the SZ-1 type inorganic silicic acid zinc paint of Beijing Inst. of Aeronautical Materials's development belongs to the zinc-rich paint that water glass is a binding agent together with the late nineteen eighties, its shortcoming is a coating poor water resistance easy to crack, early stage, the binding agent modulus low (2.4～3.6M), can not self cure, when construction, also must be coated with one deck solidifying agent again.
In order to improve the early stage water tolerance and the Corrosion Protection of aqueous inorganic zinc-enriched coating, people constantly adopt and improve binding agent modulus (SiO
2/ Na
2O mol ratio M) method.U.S. Pat 4162169 discloses the manufacture method of high-module paint adhesion agent, adopts and add silicon sol and methyltrimethoxy silane CH in potassium silicate or water glass
3Si (OCH
3)
3The preparation modulus is the paint adhesion agent of 4.8-6.0M.Be the potassium silicate zinc-rich paint (modulus is 5.3M) of representative wherein, obtained the example of a lot of successful Application with the successful IC-531 of research in 1972 of NASA.
The nineties, last starfish bridge sci-tech consultation company and Shanghai Shipbuilding Technology Research Institute develop respectively potassium silicate waterborne zinc-rich coating (5～5.3M), the LW-1 lithium silicate aqueous inorganic zinc-enriched coating of Central China Normal University's exploitation.Chinese patent CN1182105 number disclosed a kind of zinc-rich paint comprises silicate, silicon sol, water and zinc powder, and its binding agent can be a kind of in potassium silicate, water glass, lithium silicate or the pure aluminium silicate.Chinese patent CN1254736 number disclosed a kind of high-module water-based inorganic two-component zinc-rich paint, based on potassium silicate solution, order adds lithium silicate, precipitated silica, methyltrimethoxy silane CH
3Si (OCH
3)
3And Calucium Silicate powder, make the component one in the two-component coating.This patent is used the alkaline silicate aqueous solutions of potassium of modulus as 3.2M, and adds the modulus that excessive precipitated silica further improves coating, is the water resistance of coating to improve " final coating is water insoluble ".In recent years, the lithium silicate aqueous inorganic zinc-enriched coating developed again of University Of Tianjin's petroleum engineering technical college (4.5～5M) and " Wei Gangbao " potassium silicate aqueous inorganic zinc-enriched coating (5.7M) of producing of Taiwan.The silicate water-based inorganic zinc coating in this period all belongs to two-pack self cure type coating.On the erosion resistance of coating, coating performance, workability, large increase has been arranged.
Owing to contain a large amount of zinc powders in the aqueous inorganic zinc-enriched coating coating, when being subjected to power and water, the place of coating porosity or local failure separates matter when corroding, and zinc-rich coating and steel substrate have constituted corrosion cell.In this battery, the current potential of steel substrate is higher, becomes negative electrode; The current potential of zinc powder is lower, becomes anode.Because inorganic coating has good electrical conductivity, produce electric current between zinc powder and the iron and steel and electrochemical reaction takes place.Reaction makes the current potential Ecorr of steel substrate shift to more negative, and enter (E-pH figure's) and exempt from corrosion region, steel substrate current potential Ecorr through electrochemical measurement use inorganic zinc-rich coating making coatings is about-620mv, because the effect anode (zinc powder) of electric current discharges electronics, zinc powder is dissolved:
Zn-2e→Zn
2+
And the process that oxygen and ionogen obtain electronics only takes place at negative electrode (steel substrate), corrosion produces.Suppress the corrosion on steel substrate (negative electrode) surface in the above-mentioned electrochemical reaction with sacrificial metal zinc powder (anode), thereby play electro-chemical protection effect iron and steel.
In the aqueous inorganic zinc-enriched coating, the surface of zinc particle can produce zinc oxide ZnO, zinc hydroxide Zn (OH) under oxygen and aqueous vapor effect
2, and be filled in the hole of coatingsurface, and then generate zinc subcarbonate 2ZnCO with the carbon dioxide in air reaction
33Zn (OH)
2, this is a kind of stable compound that is insoluble in water, its volume greater than the volume of used up metallic zinc, coating is more fine and close to have better physical shielding effect to corrosive environment thereby can make in the hole of coating.When coating in use is scratched and makes metallic zinc expose out, because zinc is a kind of active metal, again can be by the oxidation of airborne oxygen institute, and then generation zinc hydroxide and zinc subcarbonate, the stable zinc subcarbonate that is insoluble in water can shield abraded area again, " self-enclosed ability " and " self-healing ability " of Here it is aqueous inorganic zinc-enriched coating.
Materials such as silicate, zinc hydroxide, zinc subcarbonate can make on the interface of coating and steel surface and keep slight alkalinity, steel surface and zinc powder are all remained on be difficult to the corrosive state.Silicate can generate hard ferric metasilicate passive film with the iron and steel reaction, and coating and steel substrate are combined firmly.Silicate also produces passivation to zinc powder simultaneously reduces the spending rate of zinc powder, and coating life is improved.
But, because the coating alkali metal containing ion M of silicate water-based inorganic zinc coating
+Often, cause the cure period of silicate longer, and after coatingsurface during preserving period is met water, understand the alkaline solution that forms pH＞12, the alkaline solution of overrich has destruction to the silicate coating structure, will make disadvantages such as coating appearance " efflorescence ", " coming off " too early as the water time.In addition, though the salt spray resistance of silicate water-based inorganic zinc coating coating can reach 2800～5000 hours at present, be equivalent to the protection against corrosion time limit in 14 years to 25 years, but the modern large-scale steel structure engineering corrosion-resistant erosion time limit requires to have reached 30 years to 50 years, so silicate coating has not satisfied the actual needs of Modern Steel Structure engineering.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of novel aqueous inorganic zinc coating, with early stage water tolerance that satisfies iron and steel long life anti corrosion, raising coating and the requirement that more can adapt to the outdoor construction condition.
Technical conceive of the present invention:
As everyone knows, improve the modulus (SiO of silicate bond
2/ Na
2O mol ratio M) method can improve the water resistance of aqueous inorganic zinc-enriched coating.Generally between 1～3.8M, the modulus of lithium silicate can reach 8.5M for water glass commonly used, the modulus of potassium silicate, even the modulus that adopts the way of further processing to improve also is very limited.Have in the domestic and foreign literature data and adopt silicon sol to add modulus and the acceleration solidified report that improves the coating silicate bond in the silicate coating with this to, but do not see that modulus surpasses 6M, so silicate water-based inorganic zinc coating is difficult to all that in the raising of aspects such as erosion resistance, early stage water tolerance, snappiness bigger breakthrough is arranged.
The present invention adopts silicon sol as main binder making aqueous inorganic zinc-enriched coating, has increased substantially the modulus of binding agent, and modulus is controlled in the suitable scope.Can cause coating pH value on the low side because the binding agent modulus is higher than 40M, make zinc powder enter corrosion region and evolving hydrogen reaction takes place to make the coating gelled instantaneously; Modulus is lower than 20M can cause coating keeping quality variation.Therefore, silica sol binder modulus of the present invention is controlled in the scope of 20～40M.
Because contained alkalimetal ion M in the silicon sol
+Than silicate much less (lacking ten times to tens of times), so the pH value is also lower, even also can destruction not arranged to coating structure after meeting water in preserving period, and only needs less CO in the air after silicon sol coating drying
2Just can in and the alkali in the coating and reach " neutralisation ", accelerated the curing speed of coating, so coating has shortened the curing time of coating as long as just be not made of salt behind the surface drying, the early stage water tolerance of coating has had the raising of matter, and has continuation solidified characteristics under wet environment.
Technical scheme of the present invention:
The present invention is with the mixed type silicon sol (comprising potassium type, sodium type, lithium type silicon sol or potassium sodium, potassium lithium, lithium sodium, potassium sodium lithium mixed type silicon sol) of the modulus 20～40M main binding agent as zinc-rich paint, because a large amount of SiO in the silicon sol
2Nano particle adds the polyreaction of coating, and the Corrosion Protection of coating is greatly improved.The present invention is a kind of aqueous inorganic zinc-enriched coating, and this coating is made up of A component and B component two parts.Its component and weight percent content comprise:
The A component:
Zinc powder 80%～100%
Thickening material 0～0.85%
Filler 0～20%
The B component:
Mixed type silicon sol 78.0%～88.0%
Anti-settling agent 0～3.0%
Emulsion 8.2%～16.0%
Tensio-active agent 0～0.25%
Other auxiliary agents 0～3.55%
The silicon sol of being addressed comprises that modulus is a kind of in potassium type, sodium type, lithium type silicon sol or potassium sodium, potassium lithium, lithium sodium or the potassium sodium lithium mixed type silicon sol of 20～40M (adopt the test of State Standard of the People's Republic of China GB/T4209-1996 method, convert);
The ratio of each component in the mixed type silicon sol of being addressed is counted with oxide compound:
SiO
2 20.0％～25.0％
K
2O 0～1.85％
Na
2O 0～1.12％
Li
2O 0～0.55％
Water surplus
The mixed type silicon sol of being addressed is to be that 24.0%～40.0% silicon sol and commercially available modulus are that 1.9～4.8M, weight concentration are that 20.0%～46.5% silicate is formulated by commercially available weight concentration, and said silicate is that modulus is that 2.4～3.5M, weight concentration are 24.0%～42.5% potassium silicate or/and modulus is 2.2～3.65M, weight concentration is 34.0%～46.5% water glass or/and modulus is 1.9～4.8M, weight concentration is in 20.0%～26.0% the lithium silicate one or more.
Wherein: the add-on of silicon sol is 44.6%～83.9%wt%, and the add-on of silicate is 7.0%～19.2%wt%, and water is surplus.
Compound method comprises the steps:
Said silicon sol and water are added in the reactor, under 15 ℃～55 ℃ temperature, stir, silicate is added in the above-mentioned solution again, continue to stir 30～60 minutes, static insulation 16～24 hours promptly obtains the mixed type silicon sol of being addressed.
The zinc powder of being addressed comprises 325 orders～1000 order super-fine zinc dusts, and zinc powder plays sacrificial anode (zinc powder) protection negative electrode (steel substrate) and is not corroded preferred 325 orders～500 orders as anode in the coating in corrosive environment.
The anti-settling agent of being addressed comprises natural montmorillonite, modification sodium base (or calcium base) wilkinite, zeopan inorganic gel, and it mainly acts on is the adjusting dope viscosity, prevent the zinc powder sedimentation, preferably magnesium aluminosilicate inorganic gel.
The filling kind of being addressed comprises wollastonite, kaolin, mica powder, talcum powder, silica powder, ferrophosphorus powder, titanium-iron powder etc., the filler fineness is 325 orders～1250 orders, it mainly acts on is rheological, resistance to settling, sag resistance, resistance to cracking, electroconductibility or the change frictional coefficient that improves coating, kind and the consumption that can select filler according to the different service requirements of coating and form of construction work, preferred wollastonite, ferrophosphorus powder.
The emulsion of being addressed comprises benzene emulsion, pure-acrylic emulsion, organosilicon crylic acid latex, and it mainly acts on is to improve film flexibility, shock-resistance, early stage film-forming properties etc., and preferred benzene emulsion is or/and pure-acrylic emulsion.
The tensio-active agent of being addressed comprise anion surfactant (for example Shanghai organic F-53B fluorine carboanion tensio-active agent), nonionic surface active agent, it mainly acts on is to disperse color stuffing, wetting substrate surface, preferred fluorine carboanion tensio-active agent.
The thickening material of being addressed comprises modification sodium bentonite, inorganic gel, attapulgite modified, and it mainly acts on is to regulate dope viscosity, raising paint flow sex change and sag resistance, preferred modification sodium bentonite or/and attapulgite modified.
Other auxiliary agents of being addressed comprise film coalescence aid (for example Texanol ester alcohol of U.S. EASTMAN company), defoamer (the AGITAN299 of for example German M NZING CHEMIE GMBH company, 451 Dormant oils classes or 731 silicone defoamers), pH regulator agent (for example AMP-95 amino alcohol of U.S. DOW company), silane coupling agent (for example Z-6070 coupling agent of U.S. DOW CORNING company), complexing agent (tannic acid for example, urea etc.), inhibiter (urotropine for example, phthalic acid, the AMP-95 amino alcohol, sodium wolframate etc.), it mainly acts on the freezing point that reduces coating, reduce minimum film-forming temperature, froth breaking, regulate the pH value, improve sticking power, prolong preservation period, suppress to dodge rust etc., kind and the consumption that can select auxiliary agent according to the different service requirements of coating and production technique.
The present invention can mix in proportion each component in the A component by conventional physical mixed method, promptly obtains the A component, and each component in the B component is mixed in proportion, and promptly obtains the B component.
The present invention uses like this:
The A component must be poured in the B component in proportion before using and be stirred the coating configuration proportion:
B component: A component=1: 2.0～4.0, weight ratio.
Electromicroscopic photograph proves that coating of the present invention adopts the SiO in the mixed type silicon sol
2Colloidal particle diameter has only 10～20nm (nanometer), has " specific surface area " (200 meters greatly
2About/gram), a large amount of SiO
2Micelle can aggregate into the Si-O siloxane bond rapidly in drying process tridimensional network is linked to be a complete film to whole coating.And tridimensional network is complete, and bonding force is strong, so coating has extremely strong weathering resistance.Adopt State Standard of the People's Republic of China GB/T1865-1997 to carry out anti-artificial accelerated aging test and reach 10000 hours.
Because silica sol granule surface atom coordinate is unsaturated, shows as extremely strong chemically reactive, has high chemically active SiO
2Micelle can also the penetrating metal surface film oxide and zinc powder and steel surface react; generate zinc silicate, ferric metasilicate and complex compound thereof; this is the passivation layer of the hard stable chemical performance of one deck; it can make coating and steel surface combine securely with the form of chemical bond, and passivation layer itself can improve the steel corrosion resistance again.Particle also can be also coated on the zinc powder surface with metallic zinc generation complex reaction, thereby slow down the work-ing life that zinc consumption improves coating.Therefore coating has excellent salt fog resistance, adopts State Standard of the People's Republic of China GB/T1771-1991 to carry out the salt spray resistance test and reaches 10000 hours.Adopt State Standard of the People's Republic of China GB/T1731-1993 to test, the snappiness of coating is brought up to 1 grade from 1～2 grade.The coating curing time shortened to 24 hours from 7～14 days.
Coating of the present invention prepares at normal temperatures and pressures, and preparation process does not have byproduct, the three wastes and volatile organic matter to produce environmentally safe.
Coating is tested, and the result is as follows:
| Sequence number | Interventions Requested title and unit | Assay | Testing method |
| 1 2 3 4 5 6 7 | Adhesive force (drawing the circle method) level hardness (pencil) pliability mm resistance to impact cm humidity resistance (1000h) salt spray resistance (10000h) anti-artificial accelerated aging performance (10000h) | 1 6H 1 50 does not have foaming, get rusty or the obscission ground do not have the corrosion no efflorescence, get rusty, crackle, bubble and obscission | GB/T1720-1989 GB/T6739-1996 GB/T1731-1993 GB/T1732-1993 GB/T1740-1989 GB/T1771-1991 GB/T1865-1997 |
Embodiment
Embodiment 1
Coating of the present invention is made up of solid material (A component) and liquid material (B component), and the preparation modulus is that 21.96M, weight are the example of 100kg coating:
One, preparation A component:
Weigh 0.228kg modification sodium bentonite, 2.0527kg wollastonite (1250 order), 73.72kg zinc powder (325 order), in forcing the stirring blender, fully mix 10 minutes, become solid material (A component), put into the airtight preservation of container before the use.
Two, preparation B component:
1, preparation mixed type silicon sol:
(1) weighs 14.52kg silicon sol (SiO
225.5% Na
2O 0.3% pH 9.5 particle diameter 5.2nm) and the 2.43kg deionized water add in the reactor;
(2) temperature of reactor is adjusted to 35 ℃～40 ℃, mixing speed is adjusted to solution and vortex occurs;
(3) weigh 2.71kg lithium silicate (modulus 4.8M, SiO
220.0%, Li
2O 2.07%) slowly add in the solution in the reactor;
(4) weigh 0.859kg potassium silicate (modulus 3.5M, SiO
219.23%, K
2O 8.62%) slowly add in the solution in the reactor;
(5) the reinforced back that finishes continues to stir 30～60 minutes;
(6) static insulation became potassium sodium lithium mixed type silicon sol in 16～24 hours, and its content's index is:
SiO
2 21.49％
K
2O 0.36％
Na
2O 0.21％
Li
2O 0.27％
H
2O 77.67％
Modulus is: 21.96M
2, preparation liquid material:
(1) potassium sodium lithium mixed type silicon sol is put in the reactor, opened the stirring and adjusting rotating speed till violent vortex occurs, and keep 25 ℃～30 ℃ of reactor temperatures;
(2) weigh 0.24kg inorganic gel (zeopan inorganic gel, pulvis) and add reactor fast, the intensity that keeps stirring all is dispersed in the solution static then 12～18 hours until inorganic gel;
(3) open stirring and adjusting rotating speed to liquid material and vortex occurs;
(4) weigh 3.168kg benzene emulsion (styrene-propene acid fat copolymerization anionic emulsion, solid content 49%, pH7～9) and add reactor;
(5) weigh tan-liquor (the complexing agent C of weight concentration 50%
76H
52O
46) 0.048kg adds reactor, continue to stir 20～30 minutes;
(6) the above-mentioned liquid material for preparing is filtered after colloidal mill grinds, make the liquid material further obtain homogenizing;
(7) the liquid material after will grinding is sent in the reactor again, slowly adds the fluorine carboanion surfactant soln 0.024kg of weight concentration 25%, and it is moderate in to avoid producing too much bubble to note regulating stirring intensity;
(8) last, the liquid material (B component) for preparing is put into container, airtight preservation before using.
Three, preparation coating
In container with the A component according to the B component: the ratio of A component=1: 3.167 (weight ratio) adds in the B component slowly, stirs while feeding in raw material, and it is even to continue to be stirred to coating after the A component adds, and filters and can use through 100 eye mesh screens again.
Embodiment 2
This coating is made up of solid material (A component) and liquid material (B component), and the preparation modulus is that 28.10M, weight are the example of 100kg coating:
One, preparation A component:
Weigh 0.228kg modification sodium bentonite, 2.0527kg wollastonite (1250 order), 73.72kg zinc powder (325 order), in forcing the stirring blender, fully mix 10 minutes, become solid material (A component), put into the airtight preservation of container before the use.
Two, preparation B component:
1, preparation mixed type silicon sol:
(1) weighs 15.4kg silicon sol (SiO
225.5%, Na
2O 0.3%, pH9.5, particle diameter 5.2nm) and the 2.49kg deionized water add in the reactor;
(2) temperature of reactor is adjusted to 35 ℃～40 ℃, mixing speed is adjusted to solution and vortex occurs;
(3) weigh 2.38kg lithium silicate (modulus 4.8M, SiO
220.0%, Li
2O 2.07%) slowly add in the solution in the reactor;
(4) weigh 0.25kg potassium silicate (modulus 3.5M, SiO
219.23%, K
2O 8.62%) slowly add in the solution in the reactor;
(5) the reinforced back that finishes continues to stir 30～60 minutes;
(6) static insulation became potassium sodium lithium mixed type silicon sol in 16～24 hours, and its content's index is:
SiO
2 21.78％
K
2O 0.11％
Na
2O 0.23％
Li
2O 0.24％
H
2O 77.64％
Modulus is: 28.10M
2, preparation liquid material:
(1) potassium sodium lithium mixed type silicon sol is put in the reactor, opened the stirring and adjusting rotating speed till violent vortex occurs, and keep 25 ℃～30 ℃ of reactor temperatures;
(2) weigh 0.24kg inorganic gel (zeopan inorganic gel pulvis) and add reactor fast, the intensity that keeps stirring all is dispersed in the solution until inorganic gel;
(3) weigh 2.976kg benzene emulsion (styrene-propene acid fat copolymerization anionic emulsion, solid content 49%, pH7～9) and add reactor;
(4) weigh 0.24kg AMP-95 amino alcohol (diamino-dimethyl-monopropylene glycol is regulated pH, suppressed to dodge rust) and add reactor, continue to stir 20～30 minutes.
(5) the above-mentioned liquid material for preparing is filtered after colloidal mill grinds, make the liquid material further obtain homogenizing;
(6) the liquid material after will grinding is sent in the reactor again, slowly adds the fluorine carboanion surfactant soln 0.024kg of weight concentration 25%, and it is moderate in to avoid producing too much bubble to note regulating stirring intensity;
(7) last, the liquid material (B component) for preparing is put into the airtight preservation of container.
Three, preparation coating
In container with the A component according to the B component: the ratio of A component=1: 3.167 (weight ratio) adds in the B component slowly, stirs while feeding in raw material, and it is even to continue to be stirred to coating after the A component adds, and filters and can use through 100 eye mesh screens again.
Embodiment 3
This coating is made up of solid material (A component) and liquid material (B component), and the preparation modulus is that 36.04M, weight are the example of 100kg coating:
One, preparation A component:
Weigh 0.234kg modification sodium bentonite, 0.468kg ferrophosphorus powder (1000 order), 77.298kg zinc powder (500 order), in forcing the stirring blender, fully mix 10 minutes, become solid material (A component), put into the airtight preservation of container before the use.
Two, preparation B component:
1, preparation mixed type silicon sol:
(1) weighs 14.87kg silicon sol (SiO
225.5% Na
2O 0.3% pH9.5 particle diameter 5.2nm) and the 2.21kg deionized water add in the reactor;
(2) temperature of reactor is adjusted to 35 ℃～40 ℃, mixing speed is adjusted to solution and vortex occurs;
(3) weigh 1.73kg lithium silicate (modulus 4.8M, SiO
220.0%, Li
2O 2.07%) slowly add in the solution in the reactor;
(4) the reinforced back that finishes continues to stir 30～60 minutes;
(5) static insulation became lithium sodium mixed type silicon sol in 16～24 hours, and its content's index is:
SiO
2 22.0％
Na
2O 0.23％
Li
2O 0.19％
H
2O 77.58％
Modulus is: 36.04M
2, preparation liquid material:
(1) lithium sodium mixed type silicon sol is put in the reactor, opened the stirring and adjusting rotating speed till violent vortex occurs, and keep 25 ℃～30 ℃ of reactor temperatures;
(2) weigh 0.22kg inorganic gel (zeopan inorganic gel pulvis) and add reactor fast, the intensity that keeps stirring all is dispersed in the solution static then 12～18 hours until inorganic gel;
(3) open stirring and adjusting rotating speed to liquid material and vortex occurs;
(4) weigh 2.948kg benzene emulsion (styrene-propene acid fat copolymerization anionic emulsion, solid content 49%, pH7～9) and add reactor, continue to stir 20～30 minutes;
(5) the above-mentioned liquid material for preparing is filtered after colloidal mill grinds, make the liquid material further obtain homogenizing;
(6) the liquid material after will grinding is sent in the reactor again, slowly adds the fluorine carboanion surfactant soln 0.024kg of weight concentration 25%, and it is moderate in to avoid producing too much bubble to note regulating stirring intensity;
(7) last, the liquid material (B component) for preparing is put into the airtight preservation of container.
Three, preparation coating
In container with the A component according to B component: the ratio of A component=1: 3.5455 (weight ratio) adds in the B component slowly, stirs while feeding in raw material, and it is even to continue to be stirred to coating after the A component adds, and filters and can use through 100 eye mesh screens again.
Claims (13)
1. a mixed type silicon sol water inorganic zinc coating is characterized in that, is made up of A component and B component two parts, and its component and weight percent content comprise:
The A component:
Zinc powder 80%～100%
Thickening material 0～0.85%
Filler 0～20%
The B component:
Mixed type silicon sol 78.0%～88.0%
Anti-settling agent 0～3.0%
Emulsion 8.2%～16.0%
Tensio-active agent 0～0.25%
Other auxiliary agent 0～3.55%
B component: A component=1: 2.0～4.0, weight ratio.
2. coating according to claim 1 is characterized in that, the silicon sol of being addressed comprises that modulus is a kind of in potassium type, sodium type, lithium type silicon sol or potassium sodium, potassium lithium, lithium sodium or the lithium sodium potassium mixed type silicon sol of 20～40M.
3. coating according to claim 2 is characterized in that, the ratio of each component in the mixed type silicon sol is counted with oxide compound:
SiO
2 20.0％～25.0％
K
2O 0～1.85％
Na
2O 0～1.12％
Li
2O 0～0.55％
Water surplus.
4. coating according to claim 1 is characterized in that, zinc powder comprises 325 orders～1000 order super-fine zinc dusts.
5. coating according to claim 4 is characterized in that, zinc powder is 325 orders～500 orders.
6. coating according to claim 1 is characterized in that, anti-settling agent comprises natural montmorillonite, modification sodium base or calcium-base bentonite, zeopan inorganic gel.
7. coating according to claim 6 is characterized in that anti-settling agent is the zeopan inorganic gel.
8. coating according to claim 1 is characterized in that, the filler fineness is 325 orders～1250 orders, and filling kind comprises wollastonite, kaolin, mica powder, talcum powder, silica powder, ferrophosphorus powder or titanium-iron powder.
9. coating according to claim 1 is characterized in that emulsion comprises benzene emulsion, pure-acrylic emulsion, organosilicon crylic acid latex.
10. coating according to claim 1 is characterized in that tensio-active agent comprises anion surfactant, nonionic surface active agent.
11. coating according to claim 10 is characterized in that, tensio-active agent is a fluorine carboanion tensio-active agent.
12. coating according to claim 1 is characterized in that, thickening material comprises modification sodium bentonite, inorganic gel, attapulgite modified.
13. coating according to claim 1 is characterized in that, other auxiliary agent comprises film coalescence aid, defoamer, pH regulator agent, silane coupling agent, complexing agent, inhibiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031291317A CN1325578C (en) | 2003-06-06 | 2003-06-06 | Mixed silicon sol water inorganic zinc enriching paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031291317A CN1325578C (en) | 2003-06-06 | 2003-06-06 | Mixed silicon sol water inorganic zinc enriching paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1552771A CN1552771A (en) | 2004-12-08 |
| CN1325578C true CN1325578C (en) | 2007-07-11 |
Family
ID=34322375
Family Applications (1)
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| CNB031291317A Expired - Fee Related CN1325578C (en) | 2003-06-06 | 2003-06-06 | Mixed silicon sol water inorganic zinc enriching paint |
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