Claims
- 1. An aminium compound represented by the following formula (1): wherein R1 represents substituted or unsubstituted alkyl and A2− represents a divalent organic anion having two sulfonic acid groups within its molecule.
- 2. An aminium compound as claimed in claim 1 wherein R1 is C2-C4 alkyl.
- 3. An aminium compound as claimed in claim 1 wherein R1 is n-butyl.
- 4. An aminium compound as claimed in any one of claims 1 to 3 wherein the organic anion is a naphthalenedisulfonic acid ion.
- 5. An aminium compound as claimed in claim 4 wherein the naphthalenedisulfonic acid ion is an ion of a compound represented by the following formula (2): wherein R2 represents independently hydrogen, halogen, lower alkyl, hydroxyl, alkylamino, amino, acetyl, —NHCOR3, —NHSO2R3 or —OSO2R3 in which R3 is substituted or unsubstituted aryl or substituted or unsubstituted alkyl.
- 6. An aminium compound as claimed in claim 5 wherein R2 is independently hydrogen, hydroxyl, —NHCOR3, —NHSO2R3 or —OSO2R3.
- 7. An aminium compound as claimed in claim 5 wherein R2 is hydrogen or hydroxyl.
- 8. An optical information recording medium comprising at least one aminium compound as claimed in claim 1 in a recording layer.
- 9. An optical information recording medium as claimed in claim 8 which further comprises a methine compound in the reording layer.
- 10. An optical information recording medium as claimed in claim 9 wherein the methine compound is a cyanine dye.
- 11. An optical information recording medium as claimed in claim 10 wherein the aminium compound is used in an amount of 10 to 150 parts by weight per 100 parts by weight of the cyanine dye.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-138010 |
May 1997 |
JP |
|
Parent Case Info
This application is a 371 of PCT/JP98/02113 filed May 13, 1998.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP98/02113 |
|
WO |
00 |
12/20/1999 |
12/20/1999 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO98/51661 |
11/19/1998 |
WO |
A |
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5605732 |
Mihara et al. |
Feb 1997 |
|
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