Bockstahler; Wright, Journal of the American Pharmaceutical Association (1912), 1957, vol. 46, p. 542,544
作者:Bockstahler、Wright
DOI:——
日期:——
Certain Derivatives of 2,5-Dihydroxyphenylacetic Acid
作者:R. W. Bost、C. A. Howe
DOI:10.1021/ja01121a508
日期:1952.1
US5935756A
申请人:——
公开号:US5935756A
公开(公告)日:1999-08-10
Kawai et al., Nippon Kagaku Zasshi, 1959, vol. 80, p. 795,796
作者:Kawai et al.
DOI:——
日期:——
Diazonium salt for thermosensitive recording medium
申请人:Oki Electric Industry Co., Ltd.
公开号:US05935756A1
公开(公告)日:1999-08-10
A diazonium salt for a color-forming layer of a thermosensitive recording medium, having formula (1): ##STR1## wherein R is an alkyl group having four carbon atoms which is selected from the group consisting of n-butyl, t-butyl, and sec-butyl, and X.sup.- is selected from the group consisting of hexafluorophosphate ion PF.sub.6.sup.-, tetrafluoroborate ion BF.sub.4.sup.- and tetraphenylborate ion (C.sub.6 H.sub.5).sub.4 B.sup.-. In a first embodiment, a thermosensitive recording medium has a color-forming layer which includes a diazonium salt as described above, a basic compound and a coupler. In a second embodiment, a thermosensitive recording medium has a color-forming layer which includes: a diazonium salt, a basic compound, and a coupler, wherein the diazonium salt has a formula (2): ##STR2## where R.sup.1 and R.sup.2 are alkyl groups each having one or more carbon atoms, and X.sup.- is selected from the group consisting of hexafluorophosphate ion PF.sub.6.sup.-, tetrafluoroborate ion BF.sub.4.sup.- and tetraphenylborate ion (C.sub.6 H.sub.5).sub.4 B.sup.-.