THYOSIL E1571
Acrylic polymer
Description
Acrylic polymer emulsion recommended for highly versatile primers, wash primer that exhibit excellent adhesion to difficult metallic substrates, good corrosion resistance low quality carbon steel. Excellent ability to be top coated by most solvent-based coating systems. 苯乙烯丙烯
酸乳液聚合物，可用于底漆和蚀洗底漆，不仅能附着于难以粘附的金属基材而且赋予碳钢良好的耐腐蚀性。这种树脂能够可以适于用大多数溶剂型涂料作为面漆，因此是一种用途非常广泛的水性底漆
Advantages
? Excellent properties are obtained even when the application is done under marginal, low-temperature drying conditions. 在镀锌铁皮上有优良的附着力，甚至经过铬酸盐处理也如此
? Excellent adhesion on galvanized steel, even chromium-treated. 对铝有优良的附着力，甚至未
经处理也如此
Excellent adhesion to aluminum, even untreated. 良好的内在耐腐蚀性和反应性颜料稳定性。 ? Good inherent corrosion resistance and reactive pigment stability. 能被大多数溶剂型涂料顶涂
（面漆）
? Excellent ability to be top-coated by most solvent borne coatings. 适合于较宽松的施工环境条
件，如低温
Typical Properties典型值
These properties are typical, do not constitute specifications
Appearance Solids (%) pH
Viscosity at 25oC (cP) MFFT (oC) Tg (oC)
White liquid
50 9.0 < 500 20 25
Starting formulations using THYOSIL E1571
Raw materialWaterButyl Glycol WHITE GRINDING THYOSIL Q346NTHYON PH730NTHYOSIL Q207AMP95 (2)(1)THYON T34DPM(1)(1)(1) TiO2 R-902 (3) 20.21 3.80 1.88 1.00 1.44 0.64 0.24 24.00 (%)Page 1
Kamin 2000C (4) Zinc Phosphate THYOSIL Q553WaterTotal(5)(1) 10.00 5.00 9.04 100.00 22.75 (1): Diransa, (2): Dow, (3): Dupont, (4): Kamin, (5): Casal del Rey. Manufacturing instructions
a) Mix in the Cowles with high agitation water, Butyl Glycol, THYOSIL Q346N, THYON T34DPM, THYON PH730N, THYOSIL Q207 and AMP95. b) Add slowly TiO2. Keep under agitation for 15 minutes.
c) Add slowly Kamin 2000C and Zinc Phosphate. Keep under agitation for 15 minutes. d) Add slowly THYOSIL Q553 and water. Keep under agitation for 10 minutes. e) The final paste should be homogeneous, grinds gage < 5 micron particle size.
Raw material (1)(1)PRIMER (%) THYOSIL E1571 White grinding THYON T34DPM Butyl Glycol Byk-022 Flash Inhibitor (NaNO2 10% in water) AMP95 Tego Wet 500 Tafigel PUR40 Butyl Glycol Water Total (5)(4)(3)(2)60.00 25.00 1.75 1.60 0.10 1.00 0.10 0.10 0.60 0.50 9.25 100.00 (1): Diransa, (2): BYK, (3): Dow, (4): Tego, (5): Münzing Chemie GMBH
Manufacturing instructions
a) Load into Cowles THYOSIL E1571, start moderate agitation and add White grinding keep under agitation for 5 minutes.
b) Separately mix well, THYON T34DPM, Butyl Glycol and BYK-022, add slowly by dripping onto the dispersion.
c) Add Flash Inhibitor, AMP95 and Tego Wet 500.
d) Separately mix well, Tafigel PUR40, Butyl Glycol and Water, add slowly onto the dispersion. e) Keep under agitation for 15 minutes.
Sample preparation
For testing cleaned cold rolled Steel panels according to ASTM D609 are used. One layer of Primer and one layer of Topcoats in the half panel of approximately 25 μm each one, dry film thickness are applied and dried for 1 week prior to testing.
The cutting marks in a V-shaped form are done with a cutter, in transversal lines, as to expose the underlying metal before testing.
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Test Solid Content Viscosity Ford Cup N°4 at 25°CpHGloss (Glossmeter 60o)Adhesion (ASTM D3359)Salt Fog Resistance (ASTM B117 360 Hs) Result 45P sec9.050PassExcellent Formulation Tips
As with all resins, improper formulation can detract the performance of THYOSIL E1571. The choice of paint ingredients determines its protective as well as its application properties. The choice and amount of each ingredient in the formulations provided are significant to the paint performance. Substitutes should be carefully evaluated.
? Coalescent / plasticizer: The type and level of coalescent and plasticizer in the formulation can be critical to the performance of a paint primer. The level of butyl glycol in the formulation is significant in the early corrosion resistance (early rust) and development of adhesion at low temperatures. Fast evaporating solvents are preferred for quick property development and to avoid solvent entrapment in the primer coat with subsequent topcoats. Other coalescents may be suitable, but should be evaluated for their effect on adhesion and corrosion.
While THYOSIL E1571 formulations show excellent adhesion over a wide variety of clean substrates, we have found no foolproof solution to its use over uncleaned galvanized. Over these substrates, while early adhesion is poor, we observed that this improved after a three week dry. In addition, while THYOSIL E1571 based paints can be topcoated with a large number of paints including many solvent borne paints, it is critical to check adhesion of a given paint before recommending. Many factors may affect the intercoat adhesion including hardness differences between primer and topcoat and sensitivity of the primer to solvents used in the topcoat.
? Flash Rust Inhibitors: In waterborne paints for steel, the water phase must be inhibited or flash rusting will occur. The recommended additive is sodium nitrite, which is very effective at very low use levels. There are, however, some unusual substrates which exhibit flash rusting even in a well formulated primer containing sodium nitrite.
? Defoamers: Foam control is a major concern in waterborne paint formulation design.
Additives are necessary to eliminate foam during manufacture and on application. The choice of defoamer type and level will depend primarily on the formulation and mode of application.The use of silicone defoamers should be avoided as they can affect adhesion.
? Dispersants: As in all maintenance formulations, the choice of dispersant is critical. Many dispersants, particularly polymethacrylic acid or polyacrylic acid, reduce corrosion resistance. Some formulators may prefer to use propylene-based solvents because of their reduced toxicity. Care must be taken when an alternative coalescent to butyl Cellosolve is preferred. Butyl Cellosolve is water miscible so it can be added in the grind. However, if the alternative is
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hydrophobic, it must be added in the letdown. This necessitates that extra water be used in the grind for fluidity.
? Rheology Modifiers: The efficiency of most rheology modifiers is strongly affected by the presence of water miscible solvents such as butyl glycol and ethanol. Hydrophobic solvent such as Texanol has little effect.
? Extenders: The use of calcium carbonate has been shown to interfere with the adhesion of these paints over galvanized. If only protection over mild steel is required, calcium carbonate may be satisfactory.
? Hiding Pigments: Hiding pigments can have an effect on the performance of a paint system. The use of an untreated TiO2 has shown to be better for corrosion resistance and is therefore the pigment of choice in primer formulations. The use of oxide pigments in the presence of zinc ions can cause stability problems. Untreated TiO2 is, again, better than treated, but this cautionary note applies to all oxide pigments, including red, yellow, and black iron oxides.
? Reactive pigments: For general purpose corrosion resistance, a combination of zinc phosphate and Shieldex gives a good balance of properties in THYOSIL E1571 formulations.
Safe handling Information
Before using this product, read carefully the Material Safety Data Sheet (MSDS).
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Note: The statements above are based on the current state of knowledge. They are intended to describe the product in relation to necessary safety precautions, and should not be used as a warranty of any specific property. Revision: March 2015.
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