Claims
- 1. A magnetic recording medium which comprises a support of a styrene-based polymer having a syndiotactic configuration or a composition thereof, a magnetic layer containing a curable phosphazene compound as a binder formed on the support and a lubricating layer containing a curable phosphazene compound formed on the support at the opposite side of the magnetic layer.
- 2. A magnetic recording medium according to claim 1, wherein the phosphazene compound is a chain compound having a recurring unit represented by the formula: ##STR28## wherein a and b each represent a real number satisfying a>0, b.gtoreq.0 and a+b=2, A represents a group that can be cured by polymerization, and B represents a group that cannot be cured by polymerization and having a polymerization degree of 3 or more.
- 3. A magnetic recording medium according to claim 1 wherein the phosphazene compound is a cyclic compound having a recurring unit represented by the formula: ##STR29## wherein a and b each represent a real number satisfying a>0, b.gtoreq.0 and a+b=2, A represents a group that can be cured by polymerization, and B represents a group that cannot be cured by polymerization.
- 4. A magnetic recording medium according to claim 1, wherein the phosphazene compound is a cyclic compound represented by the formula ##STR30##
- 5. A magnetic recording medium according to claim 1, wherein the phosphazene compound is a cyclic compound represented by the formula ##STR31##
- 6. A magnetic recording medium which comprises a support of a styrene-based polymer having a syndiotactic configuration or a composition thereof, a magnetic layer containing a curable phosphazene compound as a binder formed on the support, a lubricating layer containing a curable phosphazene compound formed on the support at the opposite side of the magnetic layer and a magnetic over coated layer containing a curable phosphazene compound on the magnetic layer.
- 7. A magnetic recording medium according to claim 6, wherein the phosphazene compound is a chain compound having a recurring unit represented by the formula: ##STR32## wherein a and b each represent a real number satisfying a>0, b.gtoreq.0 and a+b=2, A represents a group that can be cured by polymerization, and B represents a group that cannot be cured by polymerization and having a polymerization degree of 3 or more.
- 8. A magnetic recording medium according to claim 6 wherein the phosphazene compound is a cyclic compound having a recurring unit represented by the formula: ##STR33## wherein a and b each represent a real number satisfying a>0, b.gtoreq.0 and a+b=2, A represents a group that can be cured by polymerization, and B represents a group that cannot be cured by polymerization.
- 9. A magnetic recording medium according to claim 6, wherein the phosphazene compound is a cyclic compound represented by the formula ##STR34##
- 10. A magnetic recording medium according to claim 6, wherein the phosphazene compound is a cyclic compound represented by the formula ##STR35##
Priority Claims (3)
Number |
Date |
Country |
Kind |
63-316168 |
Dec 1988 |
JPX |
|
63-316169 |
Dec 1988 |
JPX |
|
1-019497 |
Jan 1989 |
JPX |
|
Parent Case Info
This is a division of Ser. No. 07/443,937, filed Nov. 30, 1989, now U.S. Pat. No. 5,082,717.
US Referenced Citations (10)
Foreign Referenced Citations (8)
Number |
Date |
Country |
0337316 |
Apr 1989 |
EPX |
0337316 |
Oct 1989 |
EPX |
60-217194 |
Oct 1985 |
JPX |
61-214119 |
Sep 1986 |
JPX |
62-111719 |
May 1987 |
JPX |
63-279419 |
Nov 1988 |
JPX |
1-143015 |
Jun 1989 |
JPX |
2046627 |
Nov 1980 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
443937 |
Nov 1989 |
|