Oxime ethers of Michler's hydrol, method of producing same and p

Textiles: manufacturing

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260566A, 260566AE, 427146, 427150, 428307, 428323, 428914, B41L 136

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active

041242270

ABSTRACT:
Disclosed are normally substantially colorless chromogenic oxime ether of Michler's hydrol color precursor compounds having the following generic structural formula: ##STR1## wherein R.sub.1 and R.sub.2 each represents an organic radical. More specifically, R.sub.1 may represent either a lower alkyl group having from one to five carbon atoms or a phenyl group and R.sub.2 may represent a substituted or unsubstituted phenyl group having the following formula: ##STR2## wherein R.sub.3 and R.sub.4 each separately represents either a hydrogen atom, a chlorine atom or a nitro group. These compounds are initially substantially colorless and are capable of becoming highly colored when brought into reactive contact with many conventional Lewis acid materials or the like. Accordingly, these compounds are highly useful as a component of pressuresensitive copying papers.

REFERENCES:
patent: B211786 (1975-01-01), Haddock et al.
patent: 2900388 (1959-08-01), Then
patent: 2915415 (1959-12-01), Francis et al.
patent: 3293060 (1966-12-01), Harbart
patent: 3663256 (1972-05-01), Miller et al.
patent: 4000087 (1976-12-01), Maalouf
patent: 4054718 (1977-10-01), Garner et al.

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