Desmodur® VK 5 is a mixture of diphenylmethane-4,4'-diisocyanate (MDI) with isomers and higher functional homologues (PMDI), and is suitable for combination with Baycoll® in the formulation of adhesives. It is a solvent-free, dark brown liquid of low viscosity at temperatures above 10°C that may partially crystallize at lower temperatures. This product has a pot life of 25-35 min., a phenyl isocyanate content of max. 50mg/kg, and a vapor pressure at 20°C (MDI) < 10^-5 hPa.
Desmodur® VK 5 can be combined with Baycoll in the formulation of adhesives for bonding many materials, e.g. wood, metal and plastics. Desmodur® VK 5 is particularly suitable for combining with Baycoll in the formulation of reactive two-component adhesives and moisture-curing one-component adhesives. On account of the high vapor pressure of Desmodur® VK 5, adhesives with free isocyanate groups can only be handled in work areas with adequate extraction.
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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