US5106715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner composition with polyethylene and inorganic external additive
Assignee: Fujifilm Business Innovation Corp
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Filing: 1989-02-06
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Granted: 1992-04-21
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Expires: 2009-02-06
Abstract
Abstract A toner composition for thermal fixing is disclosed, comprising a colorant, an external additive and a binder resin that contains a thermoplastic resin having a glass transition point of from 20° C. to less than 50° C. and a polyolefin polymer having an average molecular weight of 800 or more, the polyolefin polymer being present in an amount of from 5 wt % to less than 50 wt % of the total binder resin.
Inventors
- 👤 Yasuo Matsumura
- 👤 Chiaki Suzuki
- 👤 Ikutaroh Nagatsuka
- 👤 Koichi Kumashiro
- 👤 Masao Mochizuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:05
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08704; G03G9/08726; G03G9/08728; G03G9/08775; G03G9/08782; G03G9/08784; G03G9/08797; G03G9/097; G03G9/09708; G03G9/09725
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A toner composition for thermal fixing comprising: particles of a binder resin consisting essentially of (1) a thermoplastic resin having a glass transition temperature of from at least 20° C. to less than 50° C. and (2) a polyethylene wax having a weight average molecular weight of from 800 to 20,000 and having a crystallinity of from 75 to 90%, said polyethylene wax being present in an amount of from at least 5 wt % to less than 50 wt % of the total binder resin; a colorant; and particles of an external inorganic additive on the surface of the toner particles.
Claim 2
Dependent Claim
102 words
A toner composition for thermal fixing comprising: particles of a binder resin consisting essentially of (1) a thermoplastic resin having a glass transition temperature of from at least 20° C. to less than 50° C. and (2) a polyethylene wax having a weight average molecular weight of from 800 to 20,000 and having a crystallinity of from 75 to 90%, said polyethylene wax being present in an amount of from at least 5 wt % to less than 50 wt % of the total binder resin; a colorant; and particles of an external inorganic additive on the surface of the toner particles.
Claim 3
Dependent Claim
25 words
The toner composition for thermal fixing as claimed in claim 1, wherein said glass transition temperature is from 35° C. to less than 50° C.
Claim 4
Dependent Claim
31 words
The toner composition for thermal fixing as claimed in claim 1, wherein the content of said polyethylene wax is from 5 wt % to 40 wt % of said binder resin.
Claim 5
Dependent Claim
27 words
The toner composition for thermal fixing as claimed in claim 1, wherein said polyethylene wax has a weight average molecular weight of from 2,000 to 6,000. PG,20
Claim 6
Dependent Claim
24 words
The toner composition for thermal fixing as claimed in claim 1, wherein said thermoplastic resin is a styrene-acryl based resin or a polyester resin.
Claim 7
Dependent Claim
25 words
The toner composition for thermal fixing as claimed in claim 5, wherein the weight average molecular weight of said thermoplastic resin is at least 2,000.
Claim 8
Dependent Claim
37 words
The toner composition for thermal fixing as claimed in claim 1, wherein said external additive is fine particles of at least one inorganic material selected from the group consisting of silica, aluminum oxide, titanium dioxide, zinc oxide.
Claim 9
Dependent Claim
26 words
The toner composition for thermal fixing as claimed in claim 1, wherein said external additive has a particle size of from to 5 to 100 mμ.
Claim 10
Dependent Claim
25 words
The toner composition for thermal fixing as claimed in claim 1, wherein said external additive has a particle size of from 10 to 50 mμ.
Claim 11
Dependent Claim
33 words
The toner composition for thermal fixing as claimed in claim 1, wherein the content of said external additive is from 0.2 to 5.0 wt % of the total weight of the toner composition.
Claim 12
Dependent Claim
33 words
The toner composition for thermal fixing as claimed in claim 1, wherein the content of said external additive is from 0.5 to 2.0 wt % of the total weight of the toner composition.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |