| abstract |
CATIONIC COMPOUNDS OF THE 4,4'' - BIS (S - TRIAZINYLAMINO) - SILBENE - 2,2'' / DISULFONIC ACID SERIES ARE USEFUL AS OPTICAL BRIGHTENERS FOR FIBROUS MATERIALS, ESPECIALLY CELLULOSE MATERIALS. THESE BRIGHTENERS ARE COMPATIBLE WITH CATIONIC AUXILIARIES AND OPERATIVE WHEN WORKING AT LOW PH VALUES AND THUS CAPABLE OF APPLICATION TOGETHER WITH CATION-ACTIVE LAUNDRY REFINING AGENTS OR CREASE-RESISTANT FINISHING AGENTS. THEY ARE, FURTHERMORE, USEFUL FOR BRIGHTENING PAPER PULPS OR PAPER COATINGS. |