GB583720A - Manufacture of new aminotriazines - Google Patents

Abstract

Amino-triazines of the formula <FORM:0583720/IV/1> in which R is an alkoxy group preferably containing 1 to 4 carbon atoms or an alkoxyalkoxy group preferably containing from 2 to 8 carbon atoms, and R1 is hydrogen or an alkyl group preferably containing 1 to 3 carbon atoms, are obtained by heating (e.g. to 150-200 DEG C.) dicyandiamide with a nitrile of the formula R.CH(R1)CN, preferably in the presence of an alkaline reacting material, e.g. piperidine. The reaction may be carried out at atmospheric pressure or in any suitable pressure-resisting vessel. In examples, dicyandiamide is heated with (1) ethoxymethoxyacetonitrile; (2) isobutoxymethoxyacetonitrile; (3) tert-butoxyacetonitrile. Other specified nitriles are methoxymethoxyacetonitrile, methoxyaceto - nitrile, a -methoxypropionitrile and a -ethoxymethoxypropionitrile. Synthetic resins are obtained by condensing the above compounds with formaldehyde or with reactive urea-formaldehyde condensation products, e.g. dimethylol urea. These resins are useful for the manufacture of moulded articles, impregnated paper and wood, coatings, electrical insulation and adhesives, particularly plywood adhesives. Methoxymethoxyacetonitrile and ethoxymethoxyacetonitrile are obtained by heating formaldehyde cyanohydrin with methylal and diethyl formal respectively in the presence of sulphuric acid. a -Ethoxymethoxypropionitrile is obtained by heating acetaldehyde cyanohydrin and diethyl formal in the presence of sulphuric acid. Iso-butoxymethoxyacetonitrile is obtained by heating iso-butyraldehyde cyanohydrin and methylal in the presence of sulphuric acid. Tertiary-butoxyacetonitrile is obtained from t-butyl ether and cuprous cyanide.