Process for preparing N-methylated melamines

Details Process for preparing N-methylated melamines Process for preparing N-methylated melamines

2005-04-12

2005-04-12

Ford, John M. (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

Reexamination Certificate

active

06878824

ABSTRACT:
The present invention provides a process for preparing N-methylated melamines in simple steps by using inexpensive raw materials in such a manner that the proportion of mono-type, bis-type and tris-type of the N-methylated melamines as prepared can be controlled. The process comprises reacting by heating melamine with methylamine in the presence of an acidic catalyst under pressure to substitute at least one amino group of the melamine by methylamino group.

REFERENCES:
patent: 2228161 (1941-01-01), Zerweck et al.
patent: 4886882 (1989-12-01), Ebel et al.
patent: 5124379 (1992-06-01), Cipolli et al.
patent: 496690 (1938-12-01), None
patent: A 2003-12654 (2003-01-01), None
Kaiser et al., “Cyanuric Chloride Derivatives. II. Substituted Melamines”, This Journal, vol. 73, pp. 2984-2986, 1951.

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