Phenyl-benzimidazolyl-furanes for optical brightening of organic materials
US4264325A · kind A · utility
14Cited by
4References
5Claims
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Assignee
Inventors
Key dates
| Filing date | Jul 2, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Jul 2, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/927
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
2-Phenyl-5-benzimidazol-2'-yl-furanes of the formula ##STR1## in which R.sub.1 to R.sub.6 are as defined in the specification, n is the number 0 or 1 and A.crclbar. is a colorless anion equivalent to the cation of the fluorescent brightener, their preparation as well as their use for optically brightening organic materials are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.