Bayhydrol® A 145 is a water-reducible, hydrofunctional polyacrylic dispersion that is used in the formulation of aqueous two-pack clear topcoats for vehicle repair applications, heavy transport finishing and industrial coating. It can be used in combination with amino resins or blocked polyisocyanates for waterborne, one-component, industrial baking coatings. This product has an acid value of 10 ± 3, a viscosity at 23°C, (D = approx. 40 s-1) of 950 ± 550, and a non-volatile content (1g / 1h / 125°C/ convection oven) of 45 ± 2. Bayhydrol® A 145 has good pigment wetting properties and high shear stability. Bead mills have proved suitable as grinding equipment. Only pigments and extenders with a minimal water-soluble content should be used. Bayhydrol® A 145 combined with aliphatic polyisocyanates yields high-gloss topcoats which can be dried at room temperature or force-dried, e.g. at 80°C. The cured paint films are hard and flexible with good single-coat adhesion and good resistance to solvents and water.
Covestro (formerly Bayer MaterialScience) provides raw materials, such as waterborne adhesives, major high solids coatings, advanced powder coatings, and specialty sealant chemistries. Bayer produces polycarbonates and polycarbonate blends, polyurethanes, and TPU resins, particularly for design and processing parts with TPU resins applications; helping products in a wide variety of applications look better and last longer.
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