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) manufactures adhesive raw materials for use in the production of contact and heat-activated adhesives, as well as reactive and hot-melt adhesives for the transportation, furniture, footwear, packaging, and construction markets. Bayer offers a comprehensive range based on polyurethane and polychloroprene, with specialty raw materials that offer UV light and weather resistance.
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