Heat-sensitive recording materials and phenol compounds

Details Heat-sensitive recording materials and phenol compounds Heat-sensitive recording materials and phenol compounds

1993-10-05

1995-02-21

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 9, 560 11, 558234, 558235, 558241, C07C27128

Patent

active

053918061

ABSTRACT:
Heat-sensitive recording materials contain an electron-donating chromogenic compound and an electron-attracting compound. The recording materials also contain at least one compound represented by the following formula: ##STR1## wherein R.sub.1 and R.sub.3 mean a hydrogen atom or an alkyl, aralkyl or aryl group, R.sub.2 and R.sub.4 denote an alkyl, alkenyl, aralkyl or aryl group, X.sub.1, X.sub.2, Y.sub.1 and Y.sub.2 stand for an oxygen or a sulfur atom, and --Z.sub.1 -- and --Z.sub.2 -- are a specific aromatic group. Also provided are phenol compounds represented by the following formula: ##STR2## wherein R.sub.1, R.sub.2, X.sub.1 and Y.sub.1 have the same meanings as defined above; R.sub.5 and R.sub.6 are a hydrogen or halogen atom or an alkyl, alkoxy, aralkyl, aryl or hydroxyl group; p and q stand for an integer of 1-4; R.sub.5 and R.sub.6 may be either the same or different when p and q represent an integer of 2 or greater; and --Z.sub.3 -- means a specific divalent group.

REFERENCES:
patent: 3639341 (1972-02-01), Krimm et al.
patent: 4316042 (1982-02-01), Funfschilling
patent: 4396418 (1983-08-01), Schirmer et al.
patent: 4405358 (1983-09-01), Schirmer et al.
patent: 4535347 (1985-08-01), Glanz
patent: 4566900 (1986-01-01), Plath et al.

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