Patent · US Expired

Dye powder formulation

US4351640A · kind A · utility

8Cited by

4References

3Claims

0Family size

Inventors

Ortwin Schaffer · Ludwigshafen, DE
Manfred Herrmann

Key dates

Filing date	Jun 19, 1980
Grant date	Sep 28, 1982
Priority date	—
Expiry date	Jun 19, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B67/0072
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A powder formulation of the dye of the formula ##STR1## which contains sodium chloride and a condensate of .beta.-naphthalenesulfonic acid with formaldehyde, or a sulfomethylation product which is obtained by condensing phenol, formaldehyde and a sulfite or bisulfite in the presence of sodium hydroxide, using a molar ratio of phenol: formaldehyde: sulfite or bisulfite: sodium hydroxide of 1:1.0-4:0.3-1.6:0.05-0.5. The dye formulation is readily soluble in water and gives speck-free prints and dyeings, with a high color yield.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.