Cyclopolymethylenefluoran compounds

Details Cyclopolymethylenefluoran compounds Cyclopolymethylenefluoran compounds

1976-03-04

1976-10-12

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

260335, 282 275, 427151, 428914, B41L 120

Patent

active

039859304

ABSTRACT:
Novel fluoran compounds are produced represented by the general formula ##SPC1##
Wherein R.sub.1 and R.sub.2 each represent a lower alkyl group containing one to four carbon atoms and wherein R.sub.3 is a cyclopolymethylene group containing from three to four carbon atoms.
In another aspect of the invention, pressure sensitive transfer paper is produced, the transfer paper comprising a substrate having coated thereon pressure rupturable capsules containing an organic solvent solution of the novel substantially colorless cyclopolymethylenefluoran compound of this invention, the organic solvent solution of the substantially colorless cyclopolymethylenefluoran compound being capable of forming a colored dye in contact with an electron-acceptor.
In another aspect of this invention, a process is provided for producing the novel cyclopolymethylenefluoran compound of this invention by reacting equimolar quantities of a 2-(4'-N,N lower alkyl substituted amino-2'hydroxybenzoyl) benzoic acid with a phenol selected from the group consisting of 5-indanol and 5,6,7,8-tetrahydro-1-naphthol for a time period ranging from about 1 to about 24 hours at a temperature ranging from about 35 to about 110.degree. C. in sulfuric acid having a concentration above about 70% and thereafter recovering the reaction product.

REFERENCES:
patent: 3506471 (1970-04-01), Kimura et al.
patent: 3669710 (1972-06-01), Kimura et al.
patent: 3769057 (1973-10-01), Lin

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