Patent · US Expired

Process for the preparation of partially etherified methylolmelamines

US4408045A · kind A · utility

2Cited by

9References

4Claims

0Family size

Assignee

Chemie Linz GmbH · AT

Inventors

Wilhelm Dobramysl · Linz, AT
Gerhard Stern · Linz, AT
Walter Raml · Linz, AT

Key dates

Filing date	Mar 23, 1982
Grant date	Oct 4, 1983
Priority date	—
Expiry date	Mar 23, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D251/64
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for the preparation of monomeric methylolmelamine which is partially etherified with methanol or ethanol and which contains at least 4 moles of formaldehyde per mole of melamine, by reacting melamine, paraformaldehyde and methanol or ethanol in a single stage reaction, the molar ratio of melamine to formaldehyde to alcohol being 1:5 to 10:6 to 20, in a virtually anhydrous medium, under a nitrogen atmosphere, at a pH of 7 to 8 and a temperature from 50.degree. to 90.degree. C. and with a reaction time of from 3 to 30 hours.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.