Process for the manufacture of fine-crystalline fluorescent brig

Details Process for the manufacture of fine-crystalline fluorescent brig Process for the manufacture of fine-crystalline fluorescent brig

1979-07-13

1982-04-27

Demers, Arthur P.

Compositions

Organic luminescent material containing compositions

Optical brightening compositions

241 30, 542435, 542461, D06L 312

Patent

active

043269826

ABSTRACT:
A process for the manufacture of fine-crystalline fluorescent brighteners of the bis-triazinylaminostilbene series in the .beta.-crystal form by mixing the water-containing fluorescent brightener filter cake with an aqueous dispersant solution at temperatures between 70.degree. and 85.degree. C. and grinding at this temperature, is provided.

REFERENCES:
patent: 3511833 (1970-05-01), Tscharner
patent: 3630944 (1971-12-01), Ohkawa et al.
patent: 3781215 (1973-12-01), Langstroth
patent: 3870649 (1975-03-01), Langstroth
patent: 3951960 (1976-04-01), Heath et al.
patent: 3962115 (1976-06-01), Clark et al.

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