Textiles: manufacturing
Patent
1982-06-09
1984-03-06
Hess, Bruce H.
Textiles: manufacturing
4283206, 428537, 428914, B41M 522
Patent
active
044350023
ABSTRACT:
Compounds of the formula ##STR1## wherein R and R' are alkyl C.sub.1 -C.sub.4 are useful as color formers for pressure- and heat-sensitive copying materials.
REFERENCES:
patent: 4124227 (1978-11-01), Ruus
Cesark Frank F.
Thomas Daniel W.
American Cyanamid Company
Hess Bruce H.
Hultquist Steven J.
Van Riet Frank M.
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