| (19) |
 |
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(11) |
EP 0 171 039 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.05.1987 Bulletin 1987/20 |
| (43) |
Date of publication A2: |
|
12.02.1986 Bulletin 1986/07 |
| (22) |
Date of filing: 02.08.1985 |
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| (84) |
Designated Contracting States: |
|
BE DE FR GB IT |
| (30) |
Priority: |
06.08.1984 JP 16453384
|
| (71) |
Applicant: NIPPON PETROCHEMICALS COMPANY, LIMITED |
|
() |
|
| (72) |
Inventors: |
|
- Sato, Atsushi
()
- Endo, Keiji
()
- Kawakami, Shigenobu
()
- Matsuzaka, Eiichi
()
- Narui, Satoshi
()
|
|
| |
|
| (54) |
Solvent for the dye of pressure-sensitive recording paper |
(57) A solvent for the dye of pressure-sensitive recording paper which solvent has no
offensive odor and is excellent regarding the color developing rate and developed
color density. The solvent is characterized in that it comprises a fraction mainly
containing triaryldialkanes having boiling points above 350 °C but not higher than
450 °C which is prepared by disproportionating diarylalkane or a hydrocarbon mixture
comprising the same at temperatures in the range of 20 to 500 °C in the presence of
a disproportionation catalyst, said diarylalkane having a boiling point in the range
of 260 to 320 °C.