Desmophen® 670 is a solvent-free, slightly branched, hydroxyl-bearing polyester that is ideally used as a co-reactant, usually with Desmodur N 75 and N 3390, in the formulation of flexible, weather-stable coatings. They are mainly used to coat plastics and are force-dried, e.g. at 80°C. Desmophen® 670 can be used as a flexibilizer in other DD coating systems. This product has a viscosity at 23°C (80% in butyl acetate) of 2,200 ± 400 mPa·s, a pour point of approx. + 8°C, and an acid value of 2 ± 1mg KOH/g.
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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