Desmodur® Z 4470 BA is an aliphatic polyisocyanate (IPDI trimer), with approx. 70% in n-butyl acetate, and is used as the hardener component for lightfast polyurethane coating systems and as an additive resin for alkyd spray coatings. This product has an NCO content of 11.9 ± 0.4%, a non-volatile content (0.2g/1h/120°C) of 70 ± 2%, a viscosity at 23°C of 600 ± 200 mPa·s, a density at 20°C of approx. 1.06g/ml, and a monomeric IPDI of < 0.5%.
The main applications for two-component coatings based on Desmodur® Z 4470 BA are in automotive OEM and automotive refinishing. As Desmodur® Z 4470 BA has very good physical drying properties, it is also used as an additive resin in alkyd spray coatings to accelerate drying. The main applications of such coatings are in automotive refinishing and industrial finishing. On account of its high hardness, Desmodur® Z 4470 BA is normally mixed with Desmodur® N products. Preferred co-reactants are flexibilised polyacrylate polyols such as Desmophen® A 565 and A 575 and polyester polyols such as Desmophen® 670.
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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Covestro (formerly Bayer MaterialScience) 科思创 makes their documentation available in the regions indicated below:
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