CN102358804A - Special binder for waterbrone inorganic zinc-rich anti-corrosion coating - Google Patents
Special binder for waterbrone inorganic zinc-rich anti-corrosion coating Download PDFInfo
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- CN102358804A CN102358804A CN2011102363839A CN201110236383A CN102358804A CN 102358804 A CN102358804 A CN 102358804A CN 2011102363839 A CN2011102363839 A CN 2011102363839A CN 201110236383 A CN201110236383 A CN 201110236383A CN 102358804 A CN102358804 A CN 102358804A
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Abstract
The present invention discloses a special binder for a waterbrone inorganic zinc-rich anti-corrosion coating. The special binder comprises: 10-20% of an emulsion, 1-5% of an inorganic electrolyte, 2-8% of deionized water, 0.5-2% of a waterbrone adhesion accelerating agent and 60-80% of a silicate solution. With adopting the binder of the present invention to modify a common silicone-acrylate emulsion and a pure acrylic emulsion, the compatibilities and the stabilities of the organic emulsion and the silicate solution can be significantly improved.
Description
Technical field
The present invention relates to a kind of aqueous inorganic zinc-rich anti-corrosive paint adhesive special.
Background technology
The aqueous inorganic zinc rich primer is to be composition one by alkalimetal silicate, and zinc powder and pigment are composition two compositions.Composition one: composition two was generally 2.7: 1.Can be used for the harsh marine steel iron construction of oil tank, cargo tank, solvent cabin, water ballast tank and environment and condition, bridge, chimney etc., can also be as antirust heat resisting coating.Its typical case but nonrestrictive construction technology comprise the steps:
(1) steel surface of preparing spraying removes degreasing earlier, eliminates iron phosphorus, iron rust with methods such as shot-peening, sandblasts again.After treated, should remove impurity once more after, spray paint then.
(2) mixing condition: base-material should mix with zinc powder to scale.After the mixing, slowly pour zinc powder in the base-material, must stir.Because zinc powder is than great,, before the spraying of aqueous inorganic zinc rich primer, use 80-100 purpose metallic sieve to filter so still will stir at any time when spraying paint.
(3) slaking: should place certain hour by regulation after the mixing, if the performance that fully can influence lacquer inadequately of slaking.
(4) working life: because lacquer and air long meeting duration of contact and carbon dioxide in air reaction, lacquer surface meeting formation one coating film makes paints glue, so the mixed coating shelf-time must not be above 24 hours.
(5) coating is at interval: bottom line is after 48 hours, but overpainting.
(6) construction temperature: aqueous inorganic zinc rich primer construction temperature is more than 5 ℃, and relative humidity will keep ventilating below 85% simultaneously, forbids under the rainy day situation.
At above-mentioned alkalimetal silicate is that composition one, zinc powder and pigment are on the basis of the aqueous inorganic zinc rich primer formed of composition two, add various additives after, derived aqueous inorganic zinc rich primer with various functions.Such as, the aqueous inorganic zinc rich primer is a base-material with high-module potassium silicate or lithium silicate, is equipped with silicon third and/or pure-acrylic emulsion modification; Increase its toughness, be coated in steel surface after, silicate, zinc powder and iron and steel can react and generate a kind of zinc silicate iron complex; Paint film adhesion is better, extreme hardness.
CN 101525505A discloses the compound flakey zinc-aluminium of a kind of water-based protective system and preparation method thereof, and this coating belongs to two-component coating, is mixed by the composite modified base-material of organic and inorganic and two kinds of components of pigment, and is formulated according to a certain weight ratio.The component of said organic and inorganic composite base-material by silicon sol, Pottasium Hydroxide, organosilicon crylic acid latex, pigment dispersing agent, film coalescence aid, skimmer, all the other are deionized water or zero(ppm) water; The component of said pigment is made up of flake zinc powder, flakey aluminium powder.The weight ratio of organic and inorganic composite base-material and pigment is 5: 1-2.
CN 101117494A discloses a kind of process for producing aqueous inorganic anti-corrosion paint, and proportioning is: 190 parts of silicic acid quaternary amines, 10 parts of pure-acrylic emulsions, 750 parts of zinc powders, 25 parts of wollastonite powder, 25 parts of inorganic bentonites.Its production technique is: it is a two-component coating, and wherein the A component is a liquid, and the B component is a powder, and mixing ratio by weight is 1: 4; The A component is made up of first material and second material, and the first material comprises the silicic acid quaternary amine, and the second material comprises pure-acrylic emulsion, benzene emulsion; Organosilicon crylic acid latex, the weight proportion of first material and second material is 100: 20-80, the B component is by zinc powder, wollastonite powder; Compositions such as inorganic Peng Run soil, join lacquer: this coating is solid material, the two cans of liquid material, and both ratios are 4: 1, will powder be poured in the liquid during mixing; Constantly stir then, even until mixing of materials, this coating can use airless spraying, and the spraying pump intake also should be installed 60 purpose filtering nets; In spraying process, paint vehicle must often stir, and keeps coating that a good suspended state is arranged, and coating thickness is 75-100mm; Workpiece must be removed greasy dirt before sandblast, with the degreasing of pH85-11.5 grease-removing agent, and remove floating rust with steel brush.Polishing, the base material after the oil removing will fall all overlaps with grinder buffing, fly to weld and the hardened layer at plate fairing by hot working position, and derusting by sandblast makes the base material degree of cleaning reach the SA2.5 level, and the surface after the sandblasting must japanning in 8 hours.
But most of silicon third and/or pure-acrylic emulsion are owing to inorganic electrolyte in the solution is less; Electrical property and silicate base-material are inconsistent; Mix incompatible phenomenons such as being easy to occur gel, breakdown of emulsion or layering, brought inconvenience for the production of water-based inorganic zinc coating adhesive special.
Summary of the invention
Deficiency to prior art; In order to solve most of organic emulsions and potassium silicate or the inconsistent difficult problem of lithium silicate solution; The invention provides a kind of novel easy method of modifying; Use this method common silicon third and pure-acrylic emulsion are carried out modification, can significantly improve the consistency and the stability of organic emulsion and silicate solutions.
One of the object of the invention is to provide a kind of aqueous inorganic zinc-rich anti-corrosive paint that general on the market silicon third, phenylpropyl alcohol or pure-acrylic emulsion are carried out after the modification to use sticker.Said sticker is through adding inorganic electrolytes such as certain density Pottasium Hydroxide, sodium hydroxide and/or sodium hexametaphosphate solution in silicon third, phenylpropyl alcohol or pure-acrylic emulsion; Increase the specific conductivity of organic emulsion; Make its electrical property consistent with potassium silicate or lithium silicate solution; Add TMOS simultaneously as stablizer; Add the water-and acrylate adhesion promoter to increase the sticking power of organic emulsion and steel substrate, can be used as the sticker of aqueous inorganic zinc-rich anti-corrosive paint through the composite solution of modification acquisition.
Aqueous inorganic zinc-rich anti-corrosive paint of the present invention is used sticker, and its composition comprises:
It is 100% that described aqueous inorganic zinc-rich anti-corrosive paint uses each component sum of sticker.
Emulsion of the present invention is organosilicon crylic acid latex, benzene emulsion, pure-acrylic emulsion or its mixture.
Said organosilicon crylic acid latex is the existing procucts of affiliated technical field, and it can be bought through market and obtain.For example, organosilicon crylic acid latex is selected import special addition agent and features monomer for use, and introduces extraordinary organosilicon, adopts seed emulsion, coats polymerization technique through nucleocapsid and synthesizes, and it is typical but nonrestrictive performance is as shown in the table:
| Sequence number | Project | Index |
| 1 | Outward appearance | The little band blue light of oyster white liquid |
| 2 | Viscosity mPas, 3 rotor 60r/min | 200-800 |
| 3 | Solids content, wt% | 46±1 |
| 4 | The pH value | 7-9 |
| 5 | Second-order transition temperature (Tg), ℃ | 35 |
| 6 | Minimum film-forming temperature (MFT), ℃ | 23 |
Said benzene emulsion also is existing procucts, and it can commercially availablely obtain.Benzene emulsion (cinnamic acrylic ester emulsion) is to be got through emulsion copolymerization by vinylbenzene and acrylate monomer.Benzene emulsion is that the world today has one of ten big non-crosslinked type emulsions of essential industry using value; Typical benzene emulsion is a milky white liquid; The band blue light, it is typical but nonrestrictive performance is as follows: solids content 40～50%, viscosity 80～2000mPas; Level of residual monomers 0.5%, pH value 8～9.Benzene emulsion sticking power is good, and glued membrane is transparent, water-fast, oil resistant, heat-resisting, ageing-resistant performance is good.
Said pure-acrylic emulsion is transparent or milky whitely have a little light yellow thick liquid, and different the laboratory is shallow oyster white to color, but much makes oyster white under the factory condition and different according to different producer's manufacture crafts, and the inside has added due to other the raw material.Factory level pure-acrylic emulsion particle diameter is thin, high gloss, good weathering resistance, good anti-after tackiness.Pure-acrylic emulsion is typical but nonrestrictive performance is as shown in the table:
| Sequence number | Project | Index |
| 1 | Outward appearance | Milky white liquid |
| 2 | Solids content, wt% | 50±1 |
| 3 | The pH value | 7±1 |
| 4 | Minimum film-forming temperature, ℃ | 20 |
| 5 | Viscosity mpa.s | 200-800 |
| 6 | Calcium ion stability | (5% calcium chloride water 1: 4) passes through |
| 7 | Second-order transition temperature (Tg) ℃ | 23 |
| 8 | Dilution stability | 48 hours not stratified does not destroy |
Inorganic electrolyte according to the invention is Pottasium Hydroxide, sodium hydroxide, Sodium hexametaphosphate 99, or its mixture.
Deionized water of the present invention (deionized water) is meant has removed the pure water that is behind the ionic species impurity." de-ionized " of the ISO/TC of Organisme International de Normalisation 147 regulations is defined as: " deionized water is removed ionic species fully or by halves, mainly refers to adopt the ion exchange resin treatment method." present technology mainly adopts the method for RO r-o-to produce.Deionized water of the present invention also can adopt zero(ppm) water to substitute.
Water-based adhesion promoter of the present invention, said water-based adhesion promoter are the existing procucts in aqueous inorganic zinc rich primer field, and it can commercially availablely obtain.The person of ordinary skill in the field can in conjunction with specific requirement, select concrete water-based adhesion promoter according to the specialized technical knowledge of its grasp in the water-based adhesion promoter scope that is suitable for.The preferred water-and acrylate of described water-based adhesion promoter.
Silicate solutions of the present invention is the existing procucts in aqueous inorganic zinc rich primer field, and it can commercially availablely obtain.The person of ordinary skill in the field can in conjunction with specific requirement, select concrete silicate solutions according to the specialized technical knowledge of its grasp in the silicate scope that is suitable for.The preferred silicate solutions of the present invention is a potassium silicate aqueous solution.
As optimal technical scheme of the present invention, described aqueous inorganic zinc-rich anti-corrosive paint is used sticker, and its composition comprises:
It is 100% that described aqueous inorganic zinc-rich anti-corrosive paint uses each component sum of sticker.
As optimal technical scheme of the present invention, described aqueous inorganic zinc-rich anti-corrosive paint is used sticker, and it consists of:
As optimal technical scheme of the present invention, described aqueous inorganic zinc-rich anti-corrosive paint is used sticker, and it consists of:
As preferably, can add stablizer, said stablizer preferred oxygen base silane in sticker at aqueous inorganic zinc-rich anti-corrosive paint of the present invention.
Aqueous inorganic zinc-rich anti-corrosive paint of the present invention uses adhesive preparation technology to be: inorganic electrolyte is added in the deionized water dissolve, slowly pour under the whipped state in the emulsion, continue to stir 20～40min; Preferred 30min, adding modulus is 3～8, preferred 4～6; More preferably 5 potassium silicate solution; Stir 45～90min, preferred 60min promptly gets aqueous inorganic zinc-rich anti-corrosive paint adhesive special.
Useful technique effect of the present invention is; Can carry out modification to general on the market silicon third, phenylpropyl alcohol or pure-acrylic emulsion; It is compatible that itself and aqueous silicate solution are stablized, and solved the limitation of the organic emulsion that in the past can only rely on particular vendors production, widened the starting material range of choice.
Embodiment
Embodiment one
Get the raw materials ready according to following composition:
Sodium hexametaphosphate 99 added in the deionized water dissolve, slowly pour under the whipped state in the organosilicon crylic acid latex, continue to stir 30min, add modulus and be 6 potassium silicate solution, stir 60min, promptly get aqueous inorganic zinc-rich anti-corrosive paint adhesive special.
Embodiment two
Get the raw materials ready according to following composition:
Pottasium Hydroxide added in the deionized water dissolve, slowly pour under the whipped state in the pure-acrylic emulsion, continue to stir 25min, add modulus and be 5 potassium silicate solution, stir 80min, promptly get aqueous inorganic zinc-rich anti-corrosive paint adhesive special.
Comparative Examples one
Get the raw materials ready according to following composition:
Its preparation method is with embodiment one.
Comparative Examples two
Get the raw materials ready according to following composition:
Its preparation method is with embodiment two.
Embodiment 1-2 and Comparative Examples 1-2 are compared, add inorganic electrolyte such as Sodium hexametaphosphate 99 and do not add the sticker that inorganic electrolyte obtains and contrast:
| Add inorganic electrolyte | Do not add inorganic electrolyte | |
| Stability in storage (beginning layering fate d) | ≥120 | ≤3 |
| Shock-resistant (cm) | 50 | 50 |
| Sticking power (level) | 1 | 1 |
Can find out by above simultaneous test data, add the consistency that inorganic electrolyte can greatly improve silicon third and pure-acrylic emulsion and potassium silicate solution; Do not add inorganic electrolyte, organic emulsion and potassium silicate solution then can be divided into two-layer very soon, and influence is used, and other mechanical properties do not have too big-difference.Prove that thus technical scheme of the present invention has obtained unforeseeable technique effect with respect to prior art.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (10)
1. an aqueous inorganic zinc-rich anti-corrosive paint is used sticker, and its composition comprises:
It is 100% that described aqueous inorganic zinc-rich anti-corrosive paint uses each component sum of sticker.
2. sticker as claimed in claim 1 is characterized in that, its composition comprises:
It is 100% that described aqueous inorganic zinc-rich anti-corrosive paint uses each component sum of sticker.
3. according to claim 1 or claim 2 sticker is characterized in that described emulsion is organosilicon crylic acid latex, benzene emulsion, pure-acrylic emulsion or its mixture.
4. like the described sticker of one of claim 1-3, it is characterized in that said inorganic electrolyte is Pottasium Hydroxide, sodium hydroxide, Sodium hexametaphosphate 99, or its mixture.
5. like the described sticker of one of claim 1-4, it is characterized in that the preferred potassium silicate of said silicate; Described water-based adhesion promoter is a water-and acrylate.
6. sticker as claimed in claim 1 is characterized in that it consists of:
7. sticker as claimed in claim 1 is characterized in that it consists of:
8. like the described sticker of one of claim 1-7, it is characterized in that, add stablizer, said stablizer preferred oxygen base silane in sticker at said aqueous inorganic zinc-rich anti-corrosive paint.
9. like the preparation method of one of claim 1-7 said sticker, said method comprises:
Proportionally, inorganic electrolyte added in the deionized water dissolve, slowly pour in the emulsion under the whipped state; Continue to stir 20～40min, adding modulus is 3～8, preferred 4～6; More preferably 5 potassium silicate solution stirs 45～90min, promptly gets the aqueous inorganic zinc-rich anti-corrosive paint and uses sticker.
10. method as claimed in claim 8 is characterized in that, said continuation churning time is 30min; Adding modulus is 4～6, preferred 5 potassium silicate solution; Said churning time is 60min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102363839A CN102358804A (en) | 2011-08-16 | 2011-08-16 | Special binder for waterbrone inorganic zinc-rich anti-corrosion coating |
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| CN2011102363839A CN102358804A (en) | 2011-08-16 | 2011-08-16 | Special binder for waterbrone inorganic zinc-rich anti-corrosion coating |
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Application publication date: 20120222 |