Title: Pressure-sensitive recording material

Abstract: A pressure-sensitive and heat-sensitive recording material contains color-forming agents of the formula ##STR1## wherein R.sub.1 denotes hydrogen or a non-ionic radical which is free from amino groups, R.sub.2 denotes hydroxyl, alkylamino, dialkylamino, acylamino, aralkylamino, arylamino, a saturated heterocyclic radical, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy or a direct bond to R.sub.4, R.sub.3 denotes hydroxyl, alkoxy, aralkoxy, alkenyloxy, cycloalkoxy, aryloxy, alkylthio, arylthio or a radical of the formula ##STR2## wherein R.sub.5 and R.sub.6 independently of one another denote hydrogen, alkyl, aralkyl, cyloalkyl or aryl or, together with the nitrogen atom, form a ring, or R.sub.5 forms a ring with the ring B in the o-position relative to the nitrogen atom, and R.sub.4 denotes an aryl radical which is free from amino groups or a heterocyclic radical.

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Inventors: Kuhlthau, Hans-Peter (Leverkusen, DE, US)
Psaar, Hubertus (Leverkusen, DE, US)
Raue, Roderich (Leverkusen, DE, US)

Application Number: 958609
Filing Date: 1978-11-08
Publication_date: 1980-07-08
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Class(es): 503/223 106/31.2, 106/31.21, 427/150, 427/151, 428/914, 503/224, 544/143, 546/201, 548/511, 552/105, 552/108, 552/109, 552/110, 552/111
Other Classes:
US Patent Ref:

3488207	Jan, 1970	Vassiliades	282/27.
3957288	May, 1976	Lemahieu et al.	428/411.
3958815	May, 1976	Poot et al.	428/411.
3995088	Nov, 1976	Garner et al.	282/27.
4054718	Oct, 1977	Garner et al.	282/27.

Other Refs:
Primary Examiner: Hess, Bruce
Assistant Examiner:
Attorney: Sprung, Felfe, Horn, Lynch & Kramer