Oxidation dye composition containing at least one double base in combination with at least one single base and dyeing process making use of it
US5344464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1992 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Jun 23, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to dye compositions for keratinous fibres, containing: PA0 (a) at least one dye precursor belonging to group (A) of single bases chosen from para-phenylenediamines; PA0 (b) at least one dye precursor of group (B) of double bases chosen from N,N'-diphenylalkylenediamines; the dye precursors of groups (A) and (B) being chosen so that the intensity of the colour on dyed bleached hair (V.sub.B) and the intensity on dyed permanent-waved bleached hair (V.sub.PB) is such that V.sub.B -V.sub.PB =0.+-.0.5, the values of intensity or "value" being determined according to the Munsell notation, the molar ratio of the single bases of group (A) to the double bases of group (B) being between 3 and 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.