Uretdione formation in solution

Details Uretdione formation in solution Uretdione formation in solution

2006-01-17

2011-11-15

Sergent, Rabon (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C252S182200, C528S045000, C540S202000, C548S951000, C548S952000, C560S330000, C560S336000

Reexamination Certificate

active

08058382

ABSTRACT:
The invention relates to a process for preparing polyisocyanates having a high uretdione group content by phosphine-catalysed isocyanate oligomerization in the presence of organic carbonates and/or nitriles.

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Laas H J et al: “Zur Synthese Aliphatischer Polyisocyanate—Lackpolyisocyanate Mit Biuret-, Isocyanurat- Oder Uretdionstruktur the Synthesis of Aliphatic Polyisocyanates Containing Biuret, Isocyanurate or Uretdione Backbones for Use in Coatings” Jan. 1994, Journal Fur Praktische Chemie, Chemiker Zeitung, Wiley VCH, Weinheim, DE, pp. 185-200, XP000441642.

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