A quencher is disclosed having a compound represented by the following general formula (1):
wherein R
5
each independently represent a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an amino group having a substituent or not having a substituent, a hydroxy group, an aryl group, an aryloxy group, or an arylalkyl group; R
6
represents a group having a polymerizable unsaturated group, a hydroxy group, or the like; Y
1
represents an oxygen atom, or the like; An
−
represents an anion; Ar
1
represents a specific ring structure; * and ** represent binding positions; Ar
2
represents a benzene ring, a naphthalene ring, or an anthracene ring; n
1
represents a specific integer;
and the following structure (1-10) in the general formula (1) is an asymmetric structure;
(wherein R
5
, Y
1
, Ar
1
, Ar
2
, n
1
, * and ** are the same as described above.).
A thermochromic pigment composition including compounds of formula (I):
in which: X represents CHR
2
, O, OCO or CH═CH; Y represents O, COO, or OCOO; R
1
represents H or (CH
2
)
p
CH
3
; R
2
represents phenyl or H; m=12-18; n=0-14; p=12-18; and on the condition that, if n=0, X represents CHR
2
or CH═CH.
The thermochromic pigment compositions having compounds of formula (I), include thermochromic pigment microcapsules. The thermochromic pigment capsules are useable for thermochromic pigment compositions in ink which may be used writing instruments.
The invention teaches novel process steps for the rapid high yield manufacture of diphenylamines of the formula
wherein R
1
is selected from hydrogen, alkyl, and aryl;
wherein each R
2
and R
3
is the same or different and each is independently selected from hydrogen, alkyl, alkoxy, aralkyl, dialkylamino, alkylarylamino and substituted or unsubstituted aryl, the substituents on aryl being each independently selected from alkyl (C
1
-C
8
), alkoxy (C
1
-C
8
), aroxy, aralkoxy and halogen; wherein n and m are each independently an integer from 1 to 5. Diphenylamines are key intermediates for the production of leuco dyes used in pressure-sensitive and heat-sensitive imaging systems. The process in at least one embodiment comprises reacting at elevated temperature an aryl halide with an aromatic amine in an organic solvent and aqueous alkaline solution and optionally in some embodiments, phase-transfer agent, followed by addition of catalytic amounts of bis[tri(t-butylphosphine)]palladium at a suitable temperature to rapidly form diphenylamine.
[EN] DIESTER OF BISPHENOL FLUORENE COMPOUNDS AND THERMOCHROMIC PIGMENT COMPOSITIONS COMPRISING THE SAME<br/>[FR] DIESTER DE COMPOSÉS DE BISPHÉNOL FLUORÈNE ET COMPOSITIONS DE PIGMENTS THERMOCHROMIQUES COMPRENANT CELUI-CI
申请人:SOCIÉTÉ BIC
公开号:WO2020064537A1
公开(公告)日:2020-04-02
The present invention relates to the use of a compound represented by formula (I), wherein R1 and R2, identical or different, represent a C2-C30 alkyl group, a C2-C30 alkenyl group, a C2-C30 alkynyl group, or a C2-C30 alkoxy group, said alkyl, alkenyl, alkynyl, or alkoxy groups being optionally substituted with at least one hydroxy, halogen, amino, C1-C8 alkyl, or C1-C8 alkoxy group, as a temperature change regulating agent in a thermochromic ink composition. The present invention also relates to thermochromic pigment microcapsules comprising a compound of formula (I) according to the invention, to ink compositions comprising such thermochromic pigment microcapsules, and to writing instruments comprising such ink compositions. Finally, the invention also relates to a specific compound of formula (II) as such.
A thermal recording material having both of excellent coloring property and storage stability with a low cost is provided. The thermal recording material contains a leuco dye and a developer in a coloring layer, and the developer contains 2,4′-dihydroxydiphenylsulfone and 4,4′-dihydroxydiphenylsulfone with a specific ratio, and the above-mentioned two kinds of the dihydroxydiphenylsulfones are made a material obtained by sequentially undergoing a separating step for heightening the weight ratio of a 2,4′ material from a dichlorodiphenylsulfone mixture containing the 2,4′ material and a 4,4′ material, a reaction step of hydrolyzing the mixture to obtain a dihydroxydiphenylsulfone mixture, and a post-treatment step of subjecting to decolorization and purification.