Organic Polyisocyanates containing blocked isocyanate groups, a method for production thereof, use of Organic Polyisocyanates as crosslinkers and Coating or Lacquer containing

摘要

Organic Polyisocyanates containing at least two isocyanate groups whose cyclic ketones are blocked isocyanate groups with acidic CH of General formula (1) in which x represents an attractive electron Group; R1 and R2 are independently h, remnants, ( Cycle) c1-20 alkyl, aryl C6 - 24, Ester or amide (cycle) c1-20 alkyl, aryl Ester or amide C6 - 24Aliphatic / Aromatic residue mixed with 1 to 24 carbon ATOMS, which may also be part of a Ring of 4 to 8 members; n is an integer from 0 to 5; and have a total content of blocked isocyanate groups (NCO calculated as) a 20 to 0% in weight.Blocked Polyisocyanates with Organic Coatings can be obtained and Layers of Paint, High value, free of emissions with low values of yellowing. It also describes a method for their production and use in one component Polyurethane Systems, especially as Crosslinking Agent in automobile Gear fillers