RECORDING MATERIAL PRODUCED USING NON-PHENOL COMPOUND
申请人:NIPPON SODA CO., LTD.
公开号:US20150284321A1
公开(公告)日:2015-10-08
An object of the present invention is to provide a recording material or a recording sheet using, as a color-developing agent, a non-phenol compound that is a safe compound in no danger of corresponding to an endocrine disruptor and is good in color developing performance. The non-phenol compound used in the present invention is at least one selected from the group consisting of compounds represented by the following formulas (I) to (III).
RECORDING MATERIAL COMPRISING DIPHENYL SULFONE DERIVATIVE AND NOVEL DIPHENYL SULFONE DERIVATIVE COMPOUND
申请人:NIPPON SODA CO., LTD.
公开号:EP1557408A1
公开(公告)日:2005-07-27
The present invention provides a recording material which has excellent background stability, specifically heat resistance and heat and humidity resistance of the background. The recording material containing a color forming dye is characterized by containing at least one kind of diphenylsulfone derivative represented by the general formula (I):
(wherein R1 and R2 each represents a hydrogen atom or a C1 to C6 alkyl group, n represents an integer of 1 to 6, R3 and R4 each represents a halogen atom, a C1 to C6 alkyl group, etc., p and q each represents an integer of 0 to 4, X represents OR5 or NR6R7 wherein R5 represents a C1 to C6 alkyl group, a C1 to C6 hydroxyalkyl group, or a C1 to C6 alkoxy-C1 to C6 alkyl group, and R6 and R7 each represents a hydrogen atom, a C1 to C6 alkyl group, etc).
COLOR DEVELOPING COMPOSITION CONTAINING MOLECULAR COMPOUND, AND RECORDING MATERIAL
申请人:Kodama Satoshi
公开号:US20110120345A1
公开(公告)日:2011-05-26
Provided is a color-developing composition containing a molecular compound which has as a component compound a compound represented by formula (I)
[wherein Y represents a C1-C12 hydrocarbon group which is chained or branched and saturated or unsaturated, or a C1-C8 hydrocarbon group which is chained or branched, saturated or unsaturated and has an ether or thioether bond; R
1
, R
2
, R
3
and R
4
each independently represent a C1-C6 alkyl group or C2-C6 alkenyl group; n, p, q and r each represents any integer of 0 to 4; and m represents any integer of 0 to 2]. Also provided is a recording material with a sufficient color-forming sensitivity, superior storage stability, and especially with an extremely little background fogging in a heat resistance test.
The present invention is to provide methods for producing highly pure 4,4′-dihydroxydiphenyl sulfone monoethers advantageously in industrial production.
In a process for producing a compound represented by Formula (I)
1
(wherein, R
1
and R
2
are each independently halogen, alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; m and n are each independently 0 or an integer of 1 to 4; and R
3
is alkyl having 1 to 8 carbons, alkenyl having 2 to 8 carbons, cycloalkyl having 3 to 8 carbons or optionally substituted aralkyl), (1) a pH adjustment is carried out twice or more in the purification process, (2) an excessive amount of alkyl halide used is removed, (3) a solvent, such as water, containing 0.05 ppm or less of iron components is used, (4) tanks with corrosion-resistant layers over the inner walls are used, (6) a chelating agent is added, and (7) a means of drying with mechanical stir is applied.
New crystal forms of N-(p-toluenesulphonyl)-N'-(3-p-toluenesulphonyl-oxy-phenyl)urea, methods for its manufacture, its use, in particular for the manufacture of heat sensitive recording materials.