Thermal recording material

The objective of the present invention is to provide a thermal recording sheet which is satisfactory in sensitivity in color development, background heat resistance, and background color, is free from powdering, and has excellent image retention. The solution is that the sheet comprises supporting a...

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Bibliographic Details
Main Authors HAMADA, KAORU, SEKINE, TOMONORI, MIDORIKAWA, YOSHIMI, SUMIKAWA, NAOMI, TSUZUKI, YUJI
Format Patent
LanguageEnglish
Published 01.08.2003
Edition7
Subjects
COLOUR PRINTING
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:The objective of the present invention is to provide a thermal recording sheet which is satisfactory in sensitivity in color development, background heat resistance, and background color, is free from powdering, and has excellent image retention. The solution is that the sheet comprises supporting and formed thereon a thermal color development layer containing as main components a colorless or light-colored basic dye and an organic color developer, and is characterized in that the thermal color development layer contains at least one dihydroxydiphenyl sulfone compound represented by general formula (1) as the organic color developer, and further contains either at least one saturated fatty acid monoamide represented by general formula (2) in an amount of 1.5 to 5 parts per part of the organic color developer or a combination of at least one saturated fatty acid monoamide represented by general formula (2) and at least one diphenyl sulfone derivative represented by the general formula (3). In said formulas, R1 and R2 each represents C1-8 alkyl, alkenyl, or halogeno; and a and b each is an integer of 0 to 3; R3 represents C11-21 alkyl; and R4 to R9 each represents hydrogen, alkyl, halogeno, nitro, alkoxy, cyano, or allyloxy.
Bibliography:Application Number: TW200089103862