Continuous process for manufacturing substantially fully methylated substantially fully methylolated melamine compositions
US4293692A · kind A · utility
9Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1977 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Nov 17, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D251/64
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The manufacture of a substantially fully methylated, substantially fully methylolated melamine composition is carried out by a continuous process in which the methylolation of melamine is conducted in two stages, the first stage being effected at an acidic pH and the second stage being effected at an alkaline pH. The reaction mixture is then concentrated and reacted with methanol after which all of the unreacted volatiles and precipitated salts are removed to provide the product composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.