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...
Reexamination Certificate
2006-08-29
2006-08-29
Gorr, Rachel (Department: 1711)
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...
C528S073000, C540S202000
Reexamination Certificate
active
07098289
ABSTRACT:
The invention relates to novel compounds containing uretdione groups, to a process for preparing them by dimerizing aliphatic and/or cycloaliphatic isocyanates containing exclusively secondary and/or tertiary isocyanate groups and also to the use of uretdione polyisocyanates obtainable by this process from diisocyanates containing exclusively secondary and/or tertiary isocyanate groups as a starting component for polyurethane polymers, in particular as an isocyanate component in the preparation of uretdione powder coating crosslinkers.
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J. prakt. Chem., 336, (month unavailable) 1994, pp. 185-200, Hans Josef Laas, Reinhard Halpaap und Josef Pedain, Zur Synthese aliphatischer Polyisocyanate—Lackpoly-Isocyanate mit Biuret-, Isocyanurat- oder Uretdionstruktur.
Justus Liebigs Annanlen der Chemie, vol. 562, (month unavailable) 1949, pp. 75-136, Von Werner Siefken “Mono- und Polyisocyanate”.
Halpaap Reinhard
Köcher Jürgen
Laas Hans-Josef
Richter Frank
Bayer Aktiengesellschaft
Gil Joseph C.
Gorr Rachel
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