Bayhydrol® A 2427 is an aqueous, hydroxyfunctional polyacrylate dispersion used in the formulation of fast-drying, waterborne two-component polyurethane primers and topcoats, as well as one-component coatings. This product has a non-volatile content (1 g/1 h/125°C, convection oven) of 41-44, a viscosity at 23°C, (D=ca.40s-1) of max. 100, and a pH (1:3 in demineralised water) of 8-9.
Bayhydrol® A 2427 is preferably combined with anionic hydrophilically
modified polyisocyanates such as Bayhydur® XP 2487/1 to formulate transparent and pigmented primers and topcoats. Topcoats based on Bayhydrol® A 2427 and Bayhydur® XP 2487/1 are characterized by their good chemical resistance properties, especially their resistance to discoloring liquids.
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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