Process for the elimination of the residual fluorescence resulti

Details Process for the elimination of the residual fluorescence resulti Process for the elimination of the residual fluorescence resulti

1980-05-01

1982-05-04

Smith, William F.

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621646, 525420, 525435, 528327, 528331, 528423, 427170, D21H 358

Patent

active

043280692

ABSTRACT:
A process for the elimination of the fluorescence effect resulting from the treatment of fibrous materials with optical anionic agents is described which consists of treating the fibrous materials with a water soluble salt of a polymer containing the imidazoline ring of formula I ##STR1## wherein X is in the position meta or para with respect to the imidazoline ring and X is ##STR2## or --CO--NH-- The imidazoline-containing compounds prepared by reacting diethylenetriamine or triethylenetetramine with terephthalic or isophthalic acid followed by cyclization are reacted with dicyandiamide. The water soluble salt is an acid addition salt or a quaternary ammonium salt. The new polymers are described.

REFERENCES:
patent: 3639642 (1972-02-01), Matter et al.
patent: 4098454 (1978-07-01), Raspanti et al.

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