Optical brightening agents

Abstract

Abstract OPTICAL BRIGHTENERS ON THE BASIS OF SALTS OF SULPHONIC ACIDS OF THE FORMULA (4-X,2-(HO3S-)PHENYL)-CH=CH-(2-Z-1,4-PHENYLENE)-Y IN WHICH X DENOTES A TRIAZINE, TRIAZOLE, NAPHTHOTRIAZOLE, PYRAZOLE, ACYLAMINO OR UREA RADICAL; Y REPRESNETS H, C1, CN OR X; Z DENOTES H OR-SO3H, WITH GUANIDINES OF THE GENERAL FORMULA R1-N=C(-N(-R2)-R3)-N(-R4)-R1 IN WHICH R1 DENOTES H, NH2, ALKYL OR A CARBOCYCLIC RADICAL; R2, R3, R4 AND R5 REPRESNET H, ALKYL, A CARBOCYCLIC RADICAL; AND R2 TOGETHER WITH R3 OR R4 TOGETHER WITH R5 MAY ALSO DENOTE AN ALKYLENE RADICAL LINKED TO THE N-ATOM, COMPARED WITH THE FREE SULPHONIC ACID OR THE ALKALI METAL SALTS OF THE STILBENE-SULPHONIC ACIDS (I), THE SALTS WITH GUANIDINES (II) HAVE ADVANTAGES IN RESPECT OF THEIR SENSITIVITY TO HARDNESS, IN THE GRIGHTENING OF MIXED FABRICS AND IN SIMULTANEOUS HIGH QUALITY FINISHING AND OPTICAL BRIGHTENING.

Inventors

• 👤 W Horstmann

Bibliographic Details