Alkylated oxo-piperanzinyl-triazine
US5071981A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 19, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Mar 19, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/34926
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A stabilizer compound for synthetic resinous materials is a tri-substituted triazine in which each substituent is a N.sup.4 -methylated 2-keto-1,4-diazacyclohexane connected to the triazine ring through an alkylene bridge. This bridge permits efficient methylation of the N.sup.4 atom in every substituent under conditions which yield crystals having at least 90% purity. These crystals may be further purified to at least 95% purity at which purity level they contain less than 500 ppm ash. The stabilization effect of 95% pure compound in a polyacetal is such that, even with an ash content of 50 ppm, it has better stabilization properties than its 99.2% pure precursor (the non-methylated tri-substituted triazine) with an ash content of 10 ppm, as evidenced by lower formaldehyde evolved and better color retention, that is, developing less color in a water white sample after testing at 259.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.