Preparation of melamine derivatives

Details Preparation of melamine derivatives Preparation of melamine derivatives

1978-02-06

1979-03-06

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

528239, 528243, 528254, C08L 6128

Patent

active

041430166

ABSTRACT:
A process for the preparation of a substantially monomeric methylolmelamine etherified by methanol which contains per mol of melamine, more than 5 mols of formaldehyde and more than 4 mols of methyl-etherified methylol groups which has a viscosity of less than 10 Pa.s at 25.degree. C. at a solids content of at least 95%, said process comprising reacting melamine and formaldehyde in a molar ratio of from 1 : 6.2 to 1 : 8, at a temperature of from 40 to 60.degree. C., in the presence of a basic catalyst in a reaction mixture which contains from 10 to 40% by weight of water and from 40 to 20% by weight of methanol thereby producing a suspension of methylolmelamine, and then etherifying the methylol melamine in the presence of from 15 to 30 mols of methanol per mol of melamine, at a temperature of from 25 to 50.degree. C., in the presence of a strong acid.

REFERENCES:
patent: 3087837 (1963-04-01), Van Loo et al.

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