Quaternized 1-(pyrazolinylphenylsulphonyl)-piperazines
US4151163A · kind A · utility
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5Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 5, 1977 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Dec 5, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0661
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
(Pyrazolinylphenylsulfonyl)-piperazines of the formula ##STR1## wherein R.sub.1 is unsubstituted or substituted alkyl, aralkyl or alkenyl, R.sub.2 is unsubstituted or substituted alkyl, aryl or aralkyl R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are certain substituents and Y is an anion, their preparation as well as their use as optical brighteners are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.