Marking systems

Details Marking systems Marking systems

1986-10-20

1987-08-18

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified color-former

503223, 427151, B41M 516, B41M 518, B41M 522

Patent

active

046880593

ABSTRACT:
This invention relates to 3-aryl or heteroaryl-3-alkoxy, phenoxy-, alkylthio- or phenylthiophthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2-(disubstituted amino)phenylcarbonylbenzoic acids with an acid chloride or an anhydride of an alkanoic acid in the first step and a further reaction of the product of the first step with an alcohol, a thioalcohol, a phenol or a thiophenol in a second step.

REFERENCES:
patent: 3981857 (1976-09-01), Habu et al.
patent: 4032545 (1977-06-01), Borror
M. Newman and C. McCleary J. Amer. Chem. Soc. 63, 1537-1541 (1941).
N. Newman and C. Courduvelis J. Org. Chem. 30, 1795-1800 (1965).
M. Newman and C. Courduvelis J. Amer. Chem. Soc. 88, 781-784 (1966).
M. Newman and L. Lala Tetrahedron Letters 34, 3267-3269 (1969).
M. Bhatt and K. Kamath J. Chem. Soc. (B), 1036-1044 (1968).

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