A kind of environment-friendly type aqueous rust proof paint and preparation method thereofTechnical field
The present invention relates generally to a kind of water-borne coatings, relates in particular to a kind of environment-friendly type aqueous rust proof paint and preparation method thereof.
Background technology
In order to protect iron and steel not corroded, prolong its work-ing life, iron and steel is carried out corrosion-proof coating become a kind of most economical and effective means.In order to obtain the superior corrosion resistance energy, must remove the iron rust on the steel clean before the application, otherwise can cause paint film and preservative effect very poor owing to the continuous expansion of iron rust, therefore, the processing of rust removing of iron rust is the important component part of coating process, to the success or failure decisive role of corrosion-proof coating.But many heavy constructions, bridge, boats and ships, etc. the steel structure member of complexity in maintenance process owing to be subjected to the restriction of execution conditions, be difficult to adopt the mechanized construction method, can only adopt craft or power tool to eliminate rust, its result must have the residual of iron rust and various corrosion products, and that the difficult quality that causes eliminating rust is guaranteed, constructs is difficult, expense is huge.Rust cleaning is a kind of ten minutes heavy work, not only expends a large amount of man-hours but also increase expense.It is reported that steel plate application expense allocation ratio is: surface derusting 42%, construction 30%, coating 19%.Present domestic anticorrosion of steel structure is still continued to use the old technology of carrying out application after the sandblast, though preservative effect is better, but sandblast, ball blast technology also exist complex structural member many shortcomings such as dead angle, consume electric power height, dust pollution, sound pollution, cost height are arranged, so the on rust paint that preparation can directly be constructed at the rust face is very important.
Traditional process using phosphoric acid is as transforming agent, although phosphoric acid can make corrosion be converted into phosphatize phosphate coat, because hydrogen is separated out, paint film easily bubbles, and causes loss of adhesion.It relies on the composite organic acid group of grafting on the submicron macromolecule micelle, iron rust is reduced into the passivation composition with antirust ability, rearranging of molecular level takes place at whole metallic matrix in macromolecule micelle simultaneously, form the big net of a densification by the intersection film forming, because rete directly is combined by chemical bond with base material, and the molecular level of rete rearranges to make and does not almost have the space between particle, therefore rete has high closeness, high rust cleaning performance, high adhesive force does not thoroughly cause in a short time anticaustic problem thereby thoroughly solve secondary problem of rustiness before the rust cleaning back application and rust cleaning.
Compound poly-hydroxy organic molecule is called coordination or chelating with the process of metallic surface combination securely.In this technology, be coated on when film forming, the aligning of high molecular polymer molecule of the metallic surface of having got rusty: on the polymer chain numerous anchorings roll into a ball an end and base material Fe or and the main component Fe (OH) 2 of iron rust Fe (OH) 3, FeO iron ion bonding such as Fe2O3 form high stability chemical coordination key, the other end film forming forms typical hydrophobic barrier.
Summary of the invention
The object of the invention is exactly in order to remedy the defective of prior art, environment-friendly type aqueous rust proof paint and preparation method thereof to be provided.
The present invention is achieved by the following technical solutions:
A kind of environment-friendly type aqueous rust proof paint, it is made up of the raw material of following weight parts:
Benzene emulsion 70-76, aqueous acrylic emulsion 26-35, ethylene glycol monobutyl ether 2-3, Xylo-Mucine 2-3, ethanol 3-4, Sorbitol Powder 3-4, Resorcinol 2-3, pyrogallol 1-2, ethylenediamine tetramethylene fork Alendronate 3-4, oxalic acid 2-3, oxysuccinic acid 1-2, modified adhesive 1-2, methyl benzotriazazole 0.5-0.7, methylhydroxypropylcellulose 0.1-0.3, deionized water are an amount of;
The preparation method of described modified adhesive is:
(1) with 1 of 3-(iso-butylene acyl-oxygen) propyl trimethoxy silicane of Starso and its weight 2-3%, 1-2%, the methylhydroxypropylcellulose sodium of two (triethoxy the is silica-based) ethane of 2-, 2-3%, the dicumyl peroxide of 0.8-1% are mixed to join compound 10-15 deionized water doubly, high speed 1300-1500 rev/min of stirring, obtain dispersion liquid, dispersion liquid oven dry, pulverize powder;
(2) be in the ethylene glycol of 60-70% with the above-mentioned powder ultra-sonic dispersion that obtains in its quality 8-10 concentration doubly, obtain dispersion liquid;
(3) diethanolamine of adding dispersion liquid weight 2-4% in above-mentioned dispersion liquid, low speed 200-300 rev/min was stirred 2-3 minute, and adding acetic acid or sodium-acetate adjusting pH value is 4-5, ball-milling processing 2-3 hour, namely gets described modified adhesive.
A kind of environment-friendly type aqueous rust proof paint, the fineness of described Starso are 5-10nm.
A kind of preparation method of environment-friendly type aqueous rust proof paint may further comprise the steps:
(1) above-mentioned ethanol is dissolved in the 2-3 times of deionized water, adds above-mentioned Resorcinol and pyrogallol again, be stirred to dissolving, get lysate;
(2) above-mentioned methyl benzotriazazole is joined in the above-mentioned Sorbitol Powder, stirring is dissolved it fully, adds above-mentioned Xylo-Mucine, oxalic acid and oxysuccinic acid again, stirs the back and mixes with above-mentioned lysate;
(3) above-mentioned benzene emulsion and aqueous acrylic emulsion are mixed, under 200-300 rev/min stirring velocity, drip above-mentioned mixed solution, after dropwising, add successively more above-mentioned ethylenediamine tetramethylene fork Alendronate,
Methylhydroxypropylcellulose, modified adhesive after stirring, are heated to 40-50 ℃ with material, continue to stir 15-20 minute, add surplus stock at last, stir, and namely get described environment-friendly type aqueous rust proof paint.
Advantage of the present invention is:
The benzene emulsion that the present invention uses and aqueous acrylic emulsion have good intermiscibility and stability, solved the problem of present waterborne rusted paint film forming continuity, homogeneity, poor adhesive force, add to such an extent that modified adhesive has high dispersion stability and efficient binding property, it is evenly distributed in the metallic surface, make metal have high compactness and the perviousness of anti-ion, mix with various auxiliary agents and use the poor stability improved traditional rust proof paint, film and shortcoming such as owe evenly;
Coating of the present invention is to high comprehensive performances such as matrix adhesive force, preservative property, sticking power; can substitute the Coating Pretreatment technology of sandblast, ball blast fully; provide protection for a long time efficiently to the not pretreated steel surface that has got rusty; process in the not only work-ing life of significant prolongation protection against corrosion finish paint, and corrosion-proof coating (can with the brush key to exercises apply) is simple more, efficient, economy, environmental protection.
Embodiment
Embodiment 1
A kind of environment-friendly type aqueous rust proof paint, it is made up of the raw material of following weight parts (kilogram):
Benzene emulsion 76, aqueous acrylic emulsion 35, ethylene glycol monobutyl ether 3, Xylo-Mucine 3, ethanol 4, Sorbitol Powder 4, Resorcinol 3, pyrogallol 2, ethylenediamine tetramethylene fork Alendronate 4, oxalic acid 3, oxysuccinic acid 2, modified adhesive 2, methyl benzotriazazole 0.7, methylhydroxypropylcellulose 0.3, deionized water 40;
The preparation method of described modified adhesive is:
(1) with 3-(iso-butylene acyl-oxygen) propyl trimethoxy silicane of Starso and its weight 3%, 2% 1, two (triethoxy the is silica-based) ethane of 2-, 3% methylhydroxypropylcellulose sodium, 0.8% dicumyl peroxide are mixed to join the deionized water of 15 times of compounds, 1500 rev/mins of stirrings at a high speed, obtain dispersion liquid, dispersion liquid oven dry, pulverize powder;
(2) with the above-mentioned powder ultra-sonic dispersion that obtains in the concentration of 10 times of its quality is 70% ethylene glycol, obtain dispersion liquid;
(3) diethanolamine of adding dispersion liquid weight 4% in above-mentioned dispersion liquid, low speed stirred 2 minutes for 300 rev/mins, and adding acetic acid or sodium-acetate adjusting pH value is 5, and ball-milling processing 3 hours namely gets described modified adhesive.
A kind of environment-friendly type aqueous rust proof paint, the fineness of described Starso are 8nm.
A kind of preparation method of environment-friendly type aqueous rust proof paint may further comprise the steps:
(1) above-mentioned ethanol is dissolved in 3 times of deionized waters, adds above-mentioned Resorcinol and pyrogallol again, be stirred to dissolving, get lysate;
(2) above-mentioned methyl benzotriazazole is joined in the above-mentioned Sorbitol Powder, stirring is dissolved it fully, adds above-mentioned Xylo-Mucine, oxalic acid and oxysuccinic acid again, stirs the back and mixes with above-mentioned lysate;
(3) above-mentioned benzene emulsion and aqueous acrylic emulsion are mixed, under 300 rev/mins stirring velocity, drip above-mentioned mixed solution, after dropwising, add successively more above-mentioned ethylenediamine tetramethylene fork Alendronate,
Methylhydroxypropylcellulose, modified adhesive after stirring, are heated to 50 ℃ with material, continue to stir 20 minutes, add surplus stock at last, grind and stir, and namely get described environment-friendly type aqueous rust proof paint.
Performance test:
Coating of the present invention can reach even stability in storage more than 18 months, obviously improve waterborne rusted paint water-resistance property of coating energy, 25 ℃ of following 150h film non-foaming, do not come off, further improve conversion rate and degree to iron rust, guarantee that the iron rust transforming degree reaches 98% in 30min.
Concrete technical indicator sees Table:
| Project | Performance index | Testing standard |
| Appearance of film | Black is smooth smooth | Range estimation |
| Surface drying time (h) | 0.5 | GB/T 1728 - 79 |
| Do solid work the time (h) | 5 | GB/T 1728 - 79 |
| The iron rust transformation time | 15min | Range estimation |
| The iron rust transforming degree | 100% | Range estimation |
| Sticking power (level) | 1 | GB/T 1720 - 79 |
| Hardness (H) | 2 | GB/T 1720 - 79 |
| Water tolerance h) | 140 | GB/T 1733 - 93 |
| Acid resistance (h) | 75 | GB/T 1728 - 79 |
| Toxicity is with flammable | Nontoxic, do not fire | ? |