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US 6,583,216 B1Granted
Malonic ester-blocked HDI trimer with IPDA stabilization and formaldehyde stabilization
AssigneeBayer Aktiengesellschaft
InventorsEberhard König, Claus Kobusch, Uwe Klippert, Wolfram Küttner
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Abstract
The present invention relates to blocked polyisocyanate cross-linking agents and their use in one-component stoving lacquers, in particular in solvent-containing or predominantly water-based plastics coatings having a soft-feel effect.
Claims3
A blocked polyisocyanate cross-linking agent which is dissolved in a solvent or a solvent mixture and comprises the reaction product of
- a) 100 equivalent %, based on NCO groups, of an aliphatic and/or cycloaliphatic polyisocyanate,
- b) 80 to 95 equivalent % of a CH-acid ester blocking agent,
- c) 5 to 20 equivalent. %, based on NH2 groups, of an aliphatic and/or cycloaliphatic diamine and
- d) 5 to 40 mole %, based on 100 equivalent % of blocked and diamine extended isocyanate groups, of formaldehyde in chemically incorporated form.
1 more element
Dependencies are inferred from the claim text.