Oxime ethers of 4,4'-bis(N,N-diethylamino)benzhydrol and pressur

Textiles: manufacturing

Patent

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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

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