A water-like coating used on the surface of mechanical products

At a critical moment when the state is becoming more and more strict on environmental protection, the author introduces in detail a water-based coating for the surface of mechanical products, which fully conforms to environmental standards, VOC emissions are less than 80g/l, widely used in various types of construction machinery, agricultural machinery, engineering vehicles, machine tools, Civil machinery and other products, for its surface coating provides one of the most innovative water-related coating technology, this technology has been granted a national patent, patent number: CN 103468092 A
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A quote
With the country's environmental protection requirements more and more stringent, the country has issued a new "environmental protection law", "consumption tax", "sewage tax", as well as the corresponding cities introduced in order to control PM2.5 ban on the production and use of oily paint, how to achieve environmentally friendly coating technology development is the coating industry's most critical innovation moment. At a critical moment when the state is becoming more and more stringent on environmental protection, the author introduces a water-based coating for the surface of mechanical products, which fully complies with environmental standards, VOC emissions are less than 80g/ml, widely used in various types of construction machinery, agricultural machinery, engineering vehicles, machine tools, civil machinery and other product fields, for its surface coating provides a domestic most innovative water-based coating technology, this technology has obtained a national authorized patent, patent number: CN10346889 A2.
This technology is divided into two products, one is a water-based antiseptic primer made from water-based epoxy emulsion, and the other is a water-based acrylic polyurethane finish made from hydroxypropyl acrylic emulsion flattening hydrothermical isocyanate curing agent. After passing the sea selection experiment, the author selects 10 of the most representative formulations to explain the whole process of the experiment.
Water-based anti-corrosion primer preparation on the surface of mechanical products
Water-based anti-corrosion primer on the surface of mechanical products uses water-based epoxy fatty acid esters as the main raw material, flattening rust-proof pigments, pigments, water-based additives, fillers made of water-based anti-corrosion primers. Among them, water-based epoxy fatty acid esters are esterification reactions using fatty acids and epoxy and hydroxyl exyl of epoxy resin, producing epoxy esters, which are then emulsified by emulsifying the results of
2
. The reaction process is as follows:
raw material
epoxy emulsion A: AE605 (Beijing Jinhuili Applied Chemical Products Co., Ltd.), epoxy emulsion B: RD-600A (Anshan Runda Chemical), pigment: 190D oxidation Iron red (Henan Xinxiang iron oxide plant), environmental protection anti-rust pigments: X-500 (Changzhou Public Science and Technology Co., Ltd.), fillers: dispersants: 706W (Digao), anti-sulfuric acid and heavy calcium carbonate (Shandong Zibo Bin Ore Plant), Anti-sinking agent: organic bento-earth SMP-HV (Zhejiang Fenghong Materials Co., Ltd.), desiccant: NXZ (BASF, Germany), anti-foaming agent: 643 (Camilla, United States), leveling agent: 2025 (French Gaudis), drying agent: HD -CG01 (Beijing Jinhuili Applied Chemical Products Co., Ltd.), anti-flash rust agent: sodium nitrite (chemical supermarket), thickener: 3800 (France Gaudis), limeg: AMP-95 (Dow Chemical, United States), deionized water (homemade).
test formula
water-based anti-corrosion primer preparation process
using 10% deionized water I will be mixed evenly with 10% epoxy ester emulsion A and 10% epoxy emulsion B diluted, and then added in The agent AMP-95 adjusts the pH to 8.5-9.5, adds the drying agent HD-CG01, then adds the dispersant 706W and inhibitor with 5% deionized water II diluent while stirring Bubble agent, stirring speed 300 l/min, continue to stir to mix well to obtain a pre-emulsion;
add 10% iron oxide red, 500 sulphate, 500 eye heavy calcium and anti-sink agent organic bentonation SMP-HV, using 750 rpm dispersion for 10 minutes, and then the beads for grinding medium for grinding, to a fineness of 40 microns, to obtain abrasive slurry;
10% epoxy emulsion A to the abrasive slurry obtained by step 2, At the same time, the medium agent AMP-95 is used to medium to pH of 8-9, then add the debozzing agent NXZ, use 250 l/min speed stirring for 10 minutes, and then add X-500 phosphorus titanium powder, mixing with its mixing uniform, stirring speed of 800 s/min, to get mixed slurry;
To step 3 to obtain the mixture of slurry with 5% deionized water III dissolved anti-flash rust agent sodium nitrite, while adding 2025 leveling agent diluted with deionized water IV, filtration, to remove the beads, and then add 3800 thickener to adjust viscosity, viscosity control at 70-90KU, that is, to obtain the implementation of the water-based anti-corrosion paint.
model preparation
steel plate selection: ordinary low-carbon thin steel plate for the substrate, the size of 70mm x 150mm x 0.8-1.5mm;
substrate treatment: first using solvent to clean the surface, and then use 1000 sandpaper for grinding treatment, to ensure that the steel surface completely removed
clean;
general performance test board, 48 hours after maintenance under room temperature conditions detection, salt spray performance board, room temperature conditions after maintenance 7d performance testing,
performance testing
test project testing methods: paint film thickness according to the national standard GB / T13452.2, drying time according to GB / T1728, adhesion according to GB / T1720, gloss according to GB / T9754, resistance to impact / GB / T1732, toughness according to GB/T11185, water resistance according to GB/T1733, salt spray performance test GB/T1771.
water-based anticorrosive primer test results
water-based acrylic polyurethane paint coating on the surface of mechanical products
.2-1.5 design raw materials for curing, A component added sun-resistant pigments, fillers, water-based additives stitched together to make a water-based acrylic polyurethane paint, B component consists of tetylene dimethyl diocyanate (TMXDI). Reaction principle 3:
raw materials
hydroxypropyl acrylic emulsion: RHA308 (Beijing Jinhuili Applied Chemical Products Co., Ltd.), titanium dioxide: R-706 (DuPont, U.S.), carbon black: 140V (Degusa, Germany), Chromium Yellow: 107 (Henan Jiacai Chemical), Organic Bento: SMP-HV (Zhejiang Fenghong Materials Co., Ltd.), Dahong Powder: 3132 (Henan Penghua Chemical), Yan Qinglan: BGS (Jiangsu) Shuangle Chemical), Sulphate (Precipitated Sulphate, Shandong Zibo Bin Ore), Dispersant: 706W (Dico), Desiccant: NXZ (BASF, Germany), Inhibitor: 643 (Camilla, USA), Flow Flat agent: 245 (Digo), thickener: PUR62 (Oriental Austrahan Chemical), balance agent: AMP-95 (Dow, United States), hydro-water curing agent: 3174 (Bayer, Germany), deionized water.
water-based paint preparation process
dilute 30% hydroxypropyl acrylic emulsion with deionized water V, then add neutralizer AMP-95 to adjust pH to 8.5-9.5, then add deionized water VI dilution while stirring Good dispersant 706W and anti-foaming agent 643, stirring speed 250 rpm, continue to stir so that it mixes evenly to obtain a pre-emulsion;
adds pigment to the pre-emulsion obtained in step 1 (titanium white powder R706, carbon black 140V) , medium chromium yellow 107, large red powder 3132, indisium blue BGS), precipitation of sulphate, and anti-sink agent organic bentoyl SMP-HV, stirring to mix it evenly, after the beads for grinding medium, to a fineness of 20 microns, to get Abrasive slurry;
Add the remaining hydroxypropyl acrylic emulsion to the abrasive slurry obtained in step 2, adjust the pH to 8.5-9 with the liant AMP-95, then add the desmoulator NXZ and stir to mix it evenly. The stirring speed is 250 l/min, the stirring time is 10min, to get the mixed slurry,
to step 3 to the mixture of slurry with deionized water VII dilution of the leveling agent 245, over the group, to remove the beads, and then add the thickener PUR62 adjust the viscosity, viscosity control at 60-80KU, that is, to obtain water-based paint.
water-based paint performance model preparation
steel plate selection: ordinary low-carbon thin steel plate for the substrate, size 70mm x 150mm x 0.8-1.5mm;
substrate treatment: first use solvent to clean the surface, and then use 0 x sand paper for grinding treatment, to ensure that the steel surface completely clean;
will implement example 6 - example 10 samples in accordance with the A part: B part : 6:1 (weight ratio), add 5-10% of the deionized water to adjust the spray viscosity to 18-26S (NK-2 Iwata Cup 2);
Spraying composite layer and chemical resistance test dry plate by spraying, water-resistant anti-corrosion primer and water-resistant paint composite layer thickness control at 140 m, chemical resistance test dry lacquer film thickness control at 60-80 m, maintenance under room temperature conditions 7d after chemical resistance and salt spray resistance performance testing;
physical performance test board, using the horse mouth iron sheet spraying method plate, The thickness of the paint film is controlled at 20-30 microns and tested after maintenance of 2d under room temperature conditions.
performance test
test project detection method: the total thickness of the paint film according to GB/T13452.2, drying time according to GB/T1728, adhesion according to GB/T1720, gloss according to GB/T9754, impact resistance according to GB/T1732, toughness according to GB/T11185, chemical resistance according to GB/T1763, resistance to artificial aging according to GB/T23987;
Test Results
Formula Design Analysis
This product design basis is mainly in accordance with the national environmental protection requirements, all the use of water-based system design of the entire formula, fully in line with
PM2.5
and environmental standards requirements;
water-based acrylate polyurethane finish using water-based hydroxypropyl acrylate polyurethane emulsion as the main raw material, flattened with tetrymethyl benzene dichloride (TMXDI) combined into a 2K type of water-based environmental protection coating, with very excellent chemical resistance, weather resistance at the same time, combined with water-based anti-corrosion primer preparation composite layer, salt spray resistance of more than 2000 hours;
results
, through trial and error, the implementation of this example 1- implementation of 10 completely representative formula, through careful design, Makes it have very excellent anti-corrosion performance, chemical resistance and resistance to artificial aging performance,
engineering machinery, agricultural machinery, civil machinery, engineering vehicles, machine tools have been using the traditional oil system for coating, so the size of such equipment is larger, not convenient to apply in a closed environment, resulting in a great impact on the environment, while the operator's body has a great impact. A large proportion of customers in the open-air operation construction, to PM2.5 has a great impact,
this product has the most cutting-edge, most innovative water-based coating technology, has applied to the National Patent Office on September 24, 2013 patent protection, and in December 2015 authorized, its patent number is: CN 103468092 A;
Conclusion
The author mainly introduces a water-based coating for the surface of mechanical products, including water-based epoxy anti-corrosion primer and water-based acrylate polyurethane color paint, so that the paint film has very good corrosion resistance, chemical resistance and weather resistance, widely used in all kinds of mechanical products surface coating, with very good decorative effect, protective effect. This technology has the most cutting-edge, most innovative technology, access to Chinese patent protection. At the same time has been completely "industrialization", a large number of domestic machinery products, and access to the market.
Reference
1, a water - based coating used on the surface of mechanical products. Jiang Cong. China Patent: CN 103468092 A .2013-09-24
2, Yude Yan. Paint manufacturing technology. Editor. Chemical Industry Press, 2003.6 :P 207.
3, Liu Guojie. Water dispersion coating. Editor. China Light Industry