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    Home > Coatings News > Paints and Coatings Market > Application of subnomenas of ay-103W in powder coatings

    Application of subnomenas of ay-103W in powder coatings

    • Last Update: 2021-01-15
    • Source: Internet
    • Author: User
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    China Coatings Online News Information
    Abstract Article discusses in detail the performance of subnami-scale nicosium sulfate fillers and their application in powder coatings, and points out that AY-103W nicosulphate is particularly suitable for thin powder coatings.1, the foreword
    powder coating as a new industry, in the Chinese market has made rapid development and remarkable technological progress. Fillers are essential in the design and production of thermoo-solid powder coatings. Although the filling cost is relatively low, it has a greater effect on regulating the luster, surface hardness, heat resistance and production cost of powder coating static spraying.
    powder coating production enterprises in China generally use vanadium sulfate as a filler, the amount is very large, calcium carbonate filler second. According to the properties of non-metallic materials, a small amount of kaolin, talcum powder, silica ash, benthic soil, etc. are also used as functional filling. The sulfuric acid applied to powder coatings is divided into three categories according to the production process: precipitation method, grinding method and compound method.
    Precipitation of niochonium sulfate: made by the chemical synthesis of heavy crystals by the conversion furnace, with high purity, narrow particle size distribution and so on, the deficiency is that the oil absorption is high, containing a certain amount of mechanical impurities and coarse particles.
    Grinding method of niochonium sulfate: the use of ball mill or Raymond grinding, air flow grinding and other grinding equipment, by ultra-fine grinding and surface-modified physical processing methods, with low energy consumption, low manufacturing costs, large output, low oil absorption and so on, the deficiency is not high purity, containing mechanical impurities, particle size distribution is wide, the average particle size D50 can only reach a minimum of about 0.8 m.
    compound method of radon sulfate: is the above two processes of deep-processed products, such as in the precipitation of radon sulfate synthesis process to replace part of the sulfurized radon, to obtain a higher purity of products;2, subnami sulphate
    an billion group nanomaterials Co. , Ltd. production of subnamometer sulphate AY-103W is a number of research institutions and universities in the United Nations jointly developed sub-nano-series products, integrated precipitation method, grinding process advantages, advanced nanotechnology to give sulfuric acid products high performance and high functionality, greatly improving the product grade. The technical indicators of nihil sulfate AY-103W are shown in Table 1 and the particle size distribution is shown in Figure 1.3, test part
    3.1 test 1
    3.1.1 test method and test results
    In order to better understand the application characteristics of AY-103W in powder coatings, we compared it with the market commonly used precipitation of sulphate and ultra-fine sulphate, under the microscope AY-103W, precipitation of sulphate, ultra-fine sulfuric acid aggregate patterns see Figure 2. We use comparative formula, parallel test method for experimental research, epoxy / polyester white highlight powder coating test formula see Table 2, performance test includes gloss, solvent-resistant wipe, leveling (freshness), whiteness, boiling test, salt spray test, extrusion speed, etc., the test results are shown in Table 3. Polyester/TGIC-type high-gloss white powder coating test formula can be seen in Table 4, the test results can be seen in Table 5.
    3.1.2 Analysis and Discussion
    Based on the test results, we can draw the following conclusions:
    . AY-103W coating formulations can achieve higher coating gloss than the commonly used precipitation of sulphate or ultra-fine radon in both epoxy/polyester or polyester/TGIC systems, with a fuller coating surface and a glass texture.
    , the two powder coatings made of AY-103W and precipitated palladium have the same whiteness, which is much higher than that of ultra-fine radon coating.
    test results show that the effects of the three fillers on the coating are consistent and the difference is not obvious.
    100 acetone wipe test results show that the coating gloss recovery with AY103W is faster.
    .2h normal pressure water cooking test results show that formula A and formula D coating adhesion and impact resistance performance is better than other formulations, under the same conditions formula A and formula D coating loss rate is lower, nail scratches will lead to minor damage to the coating.
    As can be seen from Table 2, 95% of the particle size of the AY-103W filler is less than 1 m, which is larger than the surface area (5570m2/kg), so it is good to bind with resins and additives, easily wet by the resin, and the resulting coating film has better chemical resistance. SEM Electroscope Observation (Figure) found that formula D and formula F coating results are very different, formula D coating SEM photos can hardly observe the presence of an obvious interface, and formula F coating can find many island structures. Formula E coating structure is between Formula D and Formula F.
    shape of the AY-103W filler is closely related to the aggregate pattern. Under a higher multi-microscope, AY-103W particles are approximately ball-shaped, do not bond between particles, flaxseed oil suction value is lower than conventional precipitation, lower than ultra-fine palladium, and organic phase (resin, curing agent and Additives, etc.) good compatible, particles are extremely small (D50 about 0.5 m), curing the formation of the coating clock AY-103W particles and other components fully fusion, uniform coating, no obvious interface traces. On the contrary, in the formula F containing ultra-fine molybric particles surface irregular, oil absorption value is large, containing impurities (such as calcium carbonate, etc.), with poor organic compatibness, curing film interface traces are obvious, under the effect of external force damage is easy to show poor coating solvent resistance, slow recovery of gloss, sometimes can not be fully restored, water after serious, easy to bubble, easy to scratch, anti-impact performance significantly reduced.
    AY-103W has a larger surface area, in order to overcome the problem of high suction value, special dispersants and surface treatment agents can be added in the production process, thereby reducing the absorption value of subnami fillers.
    3.2 test
    according to the AY-103W filler particles are not adhesive, smooth, low oil absorption value, good compatible with resin and so on, if in the formulation of a large number of AY-103W fillers to obtain the paint should have fast feeding speed, extrusion speed and extrusion, and better mixing effect and other advantages, for which we carried out another set of sand powder test.
    3.2.1 test method and test results
    the gray-green sand powder formula using polyester/TGIC system was tested with the above single screw extruder, and the test formula is found in Table 6. Each formulation of 5 spray plate, in addition to coating film gloss and impact resistance test, focusing on the normal pressure 2h boiling test and neutral salt spray test. After the boiling test, the gloss, color and state changes of the surface of the model were observed, and the sample was sealed with paraffin around the sample during the salt spray test, tested in the standard salt mist test box, and then the time of dark red rust point on the surface of the coated model was observed, the test results are seen in Table 7.
    3.2.2 Analysis and discussion
    During the extruse of formulas G, H and I, the experimental single screw D30 extruder failed to show significant current changes (possibly related to low powder production). When the extruded melt flows out of the extruder head, we use the imported MT4 infrared induction thermometer to determine the melt temperature, and the results show that the formula G melt temperature is 137 degrees C to 142 degrees C, formula H and formula I melt temperature is 14 7 degrees C to 152 degrees C and 145 degrees C to 156 degrees C, indicating that filling with AY-103W can improve the mixing effect of powder coatings, reduce the viscosity of the melt and friction on the screw sleeve, increase melt fluidity. The preliminary results of the boiling test and the salt spray test also show that the AY103W filler can improve the performance of powder coating than the ultra-fine sulphate, which is commonly used to precipitate radon. 4, Conclusion
    AY-103W series of subnomenamosulphate as a new filler product, its particle size and particle size distribution is better than conventional precipitation radon and ultra-fine radon. AY-103W filler series products by special surface modified treatment, the amount of oil absorption significantly reduced, with the resin compatible significantly improved, the coating film of boiling and solvent resistance test results show that AY-103W and polyester resin and epoxy resin between the chemical Adsorption, with the effect of concedes, low melt temperature of extrusion, AY-103W significantly improved processing fluidity, improve extrusion productivity, which is not adhesive with the AY-103W microscope observed particles, no reunion results.
    AY-103W filler particle size distribution is narrow, coarse particles (large particles) control is accurate, low oil absorption, surface change makes it partially organic, very suitable for use in thin coating powder, giving the coating film better leveling and fullness.
    AY-103W nicosine sulphate has many characteristics, suitable for all kinds of powder coatings, especially thin coating powder, powder coating production or research units can be based on the needs of downstream users, combined with process and equipment conditions, to develop better powder coating products, further enhance product grade and competitiveness.
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