Blocked polyisocyanates

Details Blocked polyisocyanates Blocked polyisocyanates

2005-01-18

2005-01-18

Seidleck, James J. (Department: 1711)

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

C528S045000, C560S025000, C428S423100, C428S425800

Reexamination Certificate

active

06843933

ABSTRACT:
Blocked polyisocyanates, their preparation and use in one-component coating materials. In organic polyisocyanates having at least two isocyanate groups, the isocyanate groups are blocked with OH acidic cyclic ketones of the general formula (I). The blocked polyisocyanate system of the invention reacts without elimination of the blocking agent and possesses low crosslinking temperatures.

REFERENCES:
patent: 5071937 (1991-12-01), Potter et al.
Houben Weyl, Methoden der organschen Chemie, XIV/2, date unavailable pp. 61-70, E. Müller, “Polyurethane”.
Progress in Organic Coatings, 3, month unavailable 1975, pp. 73-99, “Blocked Isocyanates” by Z. W. Wicks, Jr.
Progress in Organic Coatings, 9, month unavailable 1981, pp. 3-28, “New Developments In The Field Of Blocked Isocyanates” by Z. W. Wicks, Jr.
Progress in Organic Coatings, 36, month unavailable 1999, pp. 148-172, “Blocked isocyanates III: Part A. Mechanisms and chemistry” by D. A. Wicks and Z. W. Wicks, Jr.
Farbe & Lack, C. R. Vincentz Verlag, Hannover, 97, month unavailable 1996, “One-pack baking urethane systems with low thermal yellowing and low curing temperature” by Dr. T. Engbert, Dr. E. König and Dr. E. Jürgens.

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