Isocyanate trimers containing iminooxadiazine dione groups, thei

Details Isocyanate trimers containing iminooxadiazine dione groups, thei Isocyanate trimers containing iminooxadiazine dione groups, thei

1997-04-30

1999-06-22

Gupta, Yogendra N.

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...

528 67, 540200, 540202, 540356, 540364, 544 67, 544221, C08G 1812, C07D22900, C07D25134, C07D27304

Patent

active

059143835

ABSTRACT:
The present invention relates to a polyisocyanate mixture containing isocyanate trimers provided that
i) 30 to 100 mole percent of the trimers are iminooxadiazine diones B and ##STR1## ii) 0 to 70 mole percent of the trimers are isocyanurates A iii) less than 10 mole percent of the polyisocyanate mixture is of the uretone imine structural type, and
iv) the ratio of the sum of the mole percents of trimers A and B to the mole percent of uretdiones is greater than 4:1
wherein
R.sup.1, R.sup.2 and R.sup.3 are the same or different and represent the groups obtained by removing an isocyanate group from an aliphatic, cycloaliphatic, aromatic and/or araliphatic isocyanate having an NCO content of less than 70% and/or their oligomers.
The present invention also relates to a process for the preparation of these isocyanate trimers, mixtures of these isocyanate trimers with other polyisocyanates and compositions containing these isocyanate trimers, in which the isocyanate groups may optionally be blocked with blocking agents, and compounds containing two or more isocyanate-reactive groups.

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J. Prakt. Chem. 336 (Month unavailable) (1994) 185-200.
Ch. Zwiener, L. Schfmalstieg, M. Sonntag, K. Nachtkamp and J. Pedain, Farbe und Lack Dec. 1991, 1052-1057 and bibliography.
Chem. Ber. (Month unavailable) 1927, 60, 295.
Chem Ber. Mar. 1987, 120, 339.
J. Chem Soc., Sep. 11th, 1945, 864-865. Textbook!, 91st-100 editions, W. de Gruyter Verlag, Berlin NY, (month unavailable) 1985, p. 408, footnote 50.

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