Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Having nonreactant particles of defined size
Patent
1992-07-23
1993-05-18
Schwartz, Pamela R.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Having nonreactant particles of defined size
503209, 503214, 503216, 503225, B41M 526
Patent
active
052121453
ABSTRACT:
A heat sensitive recording material having a recording layer formed on a substrate and containing a colorless or light-colored basic dye and a color acceptor, the heat sensitive recording material being characterized in that at least one ethyleneimine derivative of the following formula (1) is contained in the recording layer as a preservability improving agent for record images ##STR1## wherein R.sub.1 is direct bond, --O--, --S--, --SO.sub.2 -- or C.sub.1 .about.C.sub.6 alkylene, R.sub.2 and R.sub.3 are each C.sub.1 .about.C.sub.4 alkyl, C.sub.1 .about.C.sub.4 alkoxyl or halogen atom, m and n are each zero or an integer of 1 to 4.
REFERENCES:
patent: 3859112 (1975-01-01), Kohmura et al.
Koga Yasuji
Omura Haruo
Shimizu Yoshihiro
Tsuchida Tetsuo
Yoda Shuji
Kanzaki Paper Manufacturing Co. Ltd.
Schwartz Pamela R.
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