Disperse dye stable to dyeing, and its use for dyeing and printing synthetic and semi-synthetic fibre materials
US4332588A · kind A · utility
10Cited by
4References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 31, 1980 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Dec 31, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0015
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
By the slow stepwise heating up of an aqueous suspension of the crystallographically amorphous dye of the formula ##STR1## which dye is unstable to dyeing, to a temperature of 90.degree.-100.degree. C. with a halting point at 40.degree.-60.degree. C., this dye can be transformed completely into the crystalline .alpha.-modification. The novel dye modification can be easily converted, without increase of viscosity, into thinly liquid formulations which are readily pourable, which form no sediment, and which are excellently suitable for producing printing pastes, for example for printing polyester fabric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.