Melamine resin and dye mixtures
US4116918A · kind A · utility
3Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1975 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jun 3, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/812
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Melamine-formaldehyde resins of high transparency, good light fastness and low solubility are prepared from heavily N-oxymethylated melamines highly etherified with C.sub.1 to C.sub.2 alkyl, by vented kneading in liquid form at 120.degree.-160.degree. C followed by curing, all without local overheating and without the application of kneading pressure to solidified resin. A self-cleaning kneader is used and the resin that is produced is highly suited for carrying fluorescent dyes and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.