Substituted divinyl stilbenes as optical brighteners

Details Substituted divinyl stilbenes as optical brighteners Substituted divinyl stilbenes as optical brighteners

1978-06-12

1980-04-01

Torrence, Dolph H.

Coating processes

Fluorescent or phosphorescent coating

Optical brightening

25230121, 4274301, C09K 1106

Patent

active

041962290

ABSTRACT:
Disclosed are compounds of formula I ##STR1## in which R.sub.1 and R.sub.4, independently, are hydrogen, a non-chromophoric second order substituent, or alkyl or alkenyl unsubstituted or substituted by a non-chromophoric group,

REFERENCES:
patent: 3458506 (1969-07-01), Bloom et al.
patent: 3476747 (1969-11-01), Hargis et al.
patent: 3629193 (1971-12-01), Mitzner et al.
patent: 3755446 (1973-08-01), Scheuermann et al.

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