Optically brightening with a synergistic mixture
US4008166A · kind A · utility
2Cited by
6References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1974 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Aug 16, 1994 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/65
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to the optically brightening of organic fibrous materials with compositions containing a mixture of 1.2-bis-[5-methyl-benzimidazol-(2)-yl]-ethylene and 2.5-bis-[benzoxazol-(2)-yl]-thiophene. The mixture of said brighteners show surprising synergistic effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.