Radiation imagery chemistry: process – composition – or product th – Dye image from radiation sensitive dye or dye former by dry... – Composition or product
Patent
1991-07-22
1992-11-24
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Dye image from radiation sensitive dye or dye former by dry...
Composition or product
430340, 430926, 430944, G03C 172
Patent
active
051660415
ABSTRACT:
The present invention relates to a near infrared ray-decolorizable recording material comprising a near infrared ray-absorbing cationic dye-borate anion complex having the formula (I): ##STR1## wherein D.sup.+ represents a cationic dye having absorptions in the near infrared region; R.sub.1, R.sub.2, R.sub.3, and R.sub.4 independently represent an alkyl, aryl, alkaryl, allyl, aralkyl, alkenyl, alkynyl, silyl, alicyclic, or saturated or unsaturated heterocyclic group, substituted alkyl, substituted aryl, substituted alkaryl, substituted allyl, substituted aralkyl, substituted alkenyl, substituted alkynyl, or substituted silyl, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 represents an alkyl group having 1 to 8 carbon atoms.
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Patent Abstracts of Japan, vol. 14, No. 191 (JP-A-02 037 364), Apr. 1990.
Gan Yoke Ai
Hosoda Yoshikazu
Kondo Kunio
Murofushi Katsumi
Bowers Jr. Charles L.
McPherson John A.
Showa Denko K.K.
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