{65 -Modification of phenyl-azo-naphthol pigment
Abstract
Abstract solvent IN ITS NEW gamma -MODIFICATION, CHARACTERIZED BY AN X-ray diagram by means of Cu-K Alpha -radiation, which shows at glance angles of 3.7* and 12.8* maxima of high intensity, at 5.7*, 7.7* and 9.1* maxima of middle intensity and at 4.5*, 6.5*, 7.3*, 8.3* and 11.0* maxima of low intensity and a process for its preparation which comprises heating the Alpha -modification of the monoazo pigment of the same formula in an aqueous suspension, up to temperatures between 90* and 200*C, preferably 95* to 150*C. The new pigment of the gamma -phase according to the invention may be used for the most different pigment applications, for example for preparing printing inks, dispersion paints and for coloring caoutchouc, plastics, natural and synthetic resins. The pigment is further suitable for pigment printing and for coloring in the spinning mass and, especially due to its high covering power, for preparing lacquers. The dyeings obtained in the mentioned media show pure shades and good fastnesses to light, weather and bleeding. A monoazo pigment of the formula
Inventors
- 👤 Joachim Ribka
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |