Novel product and process of isocyanurate production

Details Novel product and process of isocyanurate production Novel product and process of isocyanurate production

1985-09-23

1986-07-22

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

502164, 502167, 528 53, 544193, 5441931, 5441932, C08G 1814

Patent

active

046020497

ABSTRACT:
Disclosed is a novel class of amidinium salts having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 when taken individually are independently selected from lower-alkyl, aralkyl and cycloalkyl, and, when taken together with the respective nitrogen atoms to which they are attached, R.sub.1 together with R.sub.2, and R.sub.3 together with R.sub.4 independently represent heterocyclic groups having 5 to 7 ring atoms, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are independently selected from hydrogen, lower-alkyl, aryl, aralkyl, and cycloalkyl.
The amidinium salts are very active catalysts for converting organic isocyanates to products containing isocyanurate and carbodiimide linkages.

REFERENCES:
Advances in Organic Chemistry Methods and Results, 9, Iminium Salts in Organic Chemistry Part 2, pp. 321 et seq., 1979, John Wiley & Sons, N.Y.
The Organic Chemistry of Nitrogen by N. V. Sidgwick, 1942, p. 156, Oxford University Press, New York.
Taylor et al., J. Am. Chem. Soc., 82, 3138-3141, 1960.
Taylor et al, J. Org. Chem., 28, 1108 (1963).
D. H. Clemens et al., J. Org. Chem., 29, 2932 to 2936, 1964.

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