US4880857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black-graft polymer, method for production thereof, and use thereof
Assignee: Nippon Shokubai Co Ltd
•
Filing: 1987-12-16
•
Granted: 1989-11-14
•
Expires: 2007-12-16
Abstract
Abstract A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from the class consisting of aziridine group, oxazoline group. N-hydroxyalkylamide group, epoxy group, and thioepoxy group to react with carbon black. The polymer can be used as a toner for electrostatically charged image, resin composition, coating composition, ink for thermographic transer, coating gent for magnetic recording medium, rubber composition, and carbon black dispersion and the like.
Inventors
- 👤 Yoshikuni Mori
- 👤 Mitsuo Kushino
- 👤 Hayato Ikeda
- 👤 Nobuaki Urashima
- 👤 Masuji Izubayashi
- 👤 Shigeru Tanimori
- 👤 Yoshihiro Arita
- 👤 Kiyoshi Kawamura
- 👤 Kenji Minami
- 👤 Yoshinori Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:49
CPC Classifications
C; C08; C08F; C08F255/00; B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41M5/395; C08F292/00; C08G; C08G83/00; C08G83/001; G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0902; G03G9/0904; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/735
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from an epoxy group, to react with the carbon black, wherein said polymer possesses one to two reactive groups on the average and a number average molecular weight in the range of 2,000 to 100,000.
Claim 2
Dependent Claim
56 words
A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from an epoxy group, to react with the carbon black, wherein said polymer possesses one to two reactive groups on the average and a number average molecular weight in the range of 2,000 to 100,000.
Claim 3
Dependent Claim
29 words
A carbon black-graft polymer according to claim 1, wherein said polymer possessing a reactive group is a polymer selected from the group consisting of vinyl polymers, polyesters, and polyethers.
Claim 4
Dependent Claim
39 words
A carbon black-graft polymer according to claim 1, wherein the proportion of said polymer possessing a reactive group falls in the range of 1 to 3,000 parts by weight relative to 100 parts by weight of said carbon black.
Claim 5
Dependent Claim
39 words
A carbon black-graft polymer according to claim 1, wherein the proportion of said polymer possessing a reactive group falls in the range of 5 to 1,000 parts by weight relative to 100 parts by weight of said carbon black.
Claim 6
Dependent Claim
21 words
A carbon black-graft polymer according to claim 1, wherein the pH value of said carbon black is not more than 8.
Claim 7
Dependent Claim
21 words
A carbon black-graft polymer according to claim 1, wherein the pH value of said carbon black is not more than 6.
Claim 8
Dependent Claim
18 words
A carbon black-graft polymer according to claim 1, wherein said polymer possesses one reactive group on the average.
Claim 9
Dependent Claim
19 words
A carbon black dispersion, having dispersed in a dispersion medium a carbon black-graft polymer set forth in claim 1.
Claim 10
Dependent Claim
37 words
A carbon black dispersion according to claim 8, wherein the amount of the carbon black in said carbon black-graft polymer is in the range of 1 to 80% by weight, based on the amount of said dispersion.
Claim 11
Dependent Claim
27 words
A carbon black dispersion according to claim 8, wherein said dispersion medium is at least one member selected from the group consisting of water and organic dispersions.
References Cited (Backward Citations)
US2933416A
Cited
US3623986A
Cited
US3557040A
Cited
US3661632A
Cited
US3697476A
Cited
JPH04222047A
Cited
JPH05138357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |