US6721529B2
Expired / Lapsed
US
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Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat
Assignee: Eastman Kodak Co
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Filing: 2001-09-21
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Granted: 2004-04-13
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Expires: 2021-09-21
Abstract
Abstract An improved donor member for applying a toner release agent to a toned receiver comprises a support an intermediate layer disposed on the support, and an outermost layer formed from a cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, a particulate filler containing zinc oxide, and a curable aminosiloxane, wherein the fluorocarbon thermoplastic random copolymer has subunits of:and x is from 1 to 40 or 60 to 80 mole percent, y is from 10 to 90 mole percent, z is from 10 to 90 mole percent, and x+y+z equals 100 mole percent. A fuser apparatus for electrostatographic printing comprises a fuser roll and a pressure roll forming a nip, a supply of offset preventing oil contained in a reservoir, and a donor roll for delivering the offset preventing oil to a receiver bearing a toner image, wherein the donor roll has an outermost layer formed from the described cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, particulate zinc oxide, and a curable aminosiloxane.
Inventors
- 👤 Jiann Hsing Chen
- 👤 Joseph A. Pavlisko
- 👤 Robert Arthur Lancaster
- 👤 Charles Eugene Hewitt
- 👤 Nataly Boulatnikov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
113 words
A donor member for applying a toner release agent to a toned receiver, said donor member comprising: a support, an intermediate layer disposed on the support, and an outermost layer formed from a cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, a particulate filler containing zinc oxide, and a curable aminosiloxane, said fluorocarbon thermoplastic random copolymer having subunits of: —(CH 2 CF 2 )x—, —(CF 2 CF(CF 3 )y—, and —(CF 2 CF 2 )z—, wherein x is from 1 to 40 or 60 to 80 mole percent, y is from 10 to 90 mole percent, z is from 10 to 90 mole percent, and x+y+z equals 100 mole percent.
Claim 2
Dependent Claim
113 words
A donor member for applying a toner release agent to a toned receiver, said donor member comprising: a support, an intermediate layer disposed on the support, and an outermost layer formed from a cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, a particulate filler containing zinc oxide, and a curable aminosiloxane, said fluorocarbon thermoplastic random copolymer having subunits of: —(CH 2 CF 2 )x—, —(CF 2 CF(CF 3 )y—, and —(CF 2 CF 2 )z—, wherein x is from 1 to 40 or 60 to 80 mole percent, y is from 10 to 90 mole percent, z is from 10 to 90 mole percent, and x+y+z equals 100 mole percent.
Claim 3
Dependent Claim
15 words
The donor member of claim 1 wherein the curable aminosiloxane is an amino-functional polydimethylsiloxane copolymer.
Claim 4
Dependent Claim
25 words
The donor member of claim 2 wherein the amino-functional polydimethylsiloxane copolymer comprises amino functional units selected from the group consisting of (aminoethylaminopropyl)methyl, (aminopropyl)methyl, and (aminopropyl)dimethyl.
Claim 5
Dependent Claim
36 words
The donor member of claim 1 wherein the curable aminosiloxane has a total concentration in the layer of from about 1 to about 20 parts by weight per 100 parts of the fluorocarbon thermoplastic random copolymer.
Claim 6
Dependent Claim
36 words
The donor member of claim 4 wherein the curable aminosiloxane has a total concentration in the layer of from about 5 to about 15 parts by weight per 100 parts of the fluorocarbon thermoplastic random copolymer.
Claim 7
Dependent Claim
36 words
The donor member of claim 1 wherein the zinc oxide has a total concentration in the layer of from about 1 to about 20 parts by weight per 100 parts of the fluorocarbon thermoplastic random copolymer.
Claim 8
Dependent Claim
33 words
The donor member of claim 6 wherein zinc oxide has a total concentration in the layer of from 3 to 15 parts by weight per 100 parts of the fluorocarbon thermoplastic random copolymer.
Claim 9
Dependent Claim
13 words
The donor member of claim 1 wherein said curing agent comprises bisphenol residues.
Claim 10
Dependent Claim
16 words
The donor member of claim 1 wherein the fluorocarbon thermoplastic random copolymer is nucleophilic addition cured.
Claim 11
Dependent Claim
32 words
The donor member of claim 1 wherein x is from 60 to 80 mole percent, y is from 10 to 90 mole percent, and z is from 10 to 90 mole percent.
Claim 12
Dependent Claim
24 words
The donor member of claim 10 wherein x is from 60 to 75 mole percent and y is from 14 to 58 mole percent.
Claim 13
Dependent Claim
14 words
The donor member of claim 1 wherein z is greater than 40 mole percent.
Claim 14
Dependent Claim
17 words
The donor member of claim 1 wherein the fluorocarbon thermoplastic random copolymer further comprises a fluorinated resin.
Claim 15
Dependent Claim
20 words
The donor member of claim 13 wherein the fluorinated resin has a number average molecular weight between 50,000 and 50,000,000.
Claim 16
Dependent Claim
22 words
The donor member of claim 13 wherein the ratio of fluorocarbon thermoplastic random copolymer to fluorinated resin is between 1:1 and 50:1.
Claim 17
Dependent Claim
14 words
The donor member of claim 13 wherein the fluorinated resin is polytetrafluoroethylene or fluoroethylenepropylene.
Claim 18
Dependent Claim
27 words
The donor member of claim 1 wherein the outermost layer has a kinetic coefficient of friction value of less than about 0.6, as determined at room temperature.
Claim 19
Dependent Claim
27 words
The donor member of claim 1 wherein the outermost layer has a static coefficient of friction value of less than about 0.8, as determined at room temperature.
Claim 20
Dependent Claim
80 words
The donor member of claim 1 wherein the intermediate layer comprises a composition of: (a) a crosslinkable poly(dialkylsiloxane) incorporating an oxide, wherein the poly(dialkylsiloxane) has a weight-average molecular weight before crosslinking of about 1,000 to about 90,000; (b) optionally, one or more crosslinkable polysiloxanes selected from the group consisting of a poly(diarylsiloxane), a poly(arylalkylsiloxane), and mixtures thereof; (c) about 1 to about 5 parts by weight per hundred parts of polysiloxane of finely divided filler; and (d) a crosslinking catalyst.
Claim 21
Dependent Claim
128 words
The donor member of claim 1 wherein the intermediate layer comprises the crosslinked product of a mixture of at least one polyorganosiloxane having the formula A—[Si(CH 3 )R 1 O] n [Si(CH 3 )R 2 O] m —D where R 1 and R 2 are each independently selected from the group consisting hydrogen, unsubstituted alkyl, alkenyl, or aryl groups containing up to about 18 carbon atoms, and fluorosubstituted alkyl groups containing up to about 18 carbon atoms; A and D are each independently selected from the group consisting of hydrogen, a methyl group, a hydroxyl group, and a vinyl group; m and n are each integers defining the number of repeat units and each independently rages from 0 to about 10,000; a crosslinking agent; and a crosslinking catalyst.
Claim 22
Dependent Claim
21 words
The donor member of claim 1 wherein the intermediate layer has a Shore A hardness of about 30 to about 70.
Claim 23
Dependent Claim
21 words
The donor member of claim 21 wherein the intermediate layer has a Shore A hardness of about 30 to about 40.
Claim 24
Dependent Claim
12 words
The donor member of claim 1 wherein the support is cylindrically shaped.
Claim 25
Dependent Claim
144 words
A fuser apparatus for electrostatographic printing comprising a fuser roll and a pressure roll forming a nip, a supply of offset preventing oil contained in a reservoir, and a donor roll for delivering the offset preventing oil to a receiver bearing a toner image, said donor roll comprising: a support, an intermediate layer disposed on the support, and an outermost layer formed from a cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, a particulate filler containing zinc oxide, and a curable aminosiloxane, said fluorocarbon thermoplastic random copolymer having subunits of: —(CH 2 CF 2 )x—, —(CF 2 CF(CF 3 )y—, and —(CF 2 CF 2 )z—, wherein x is from 1 to 40 or 60 to 80 mole percent, y is from 10 to 90 mole percent, z is from 10 to 90 mole percent, and x+y+z equals 100 mole percent.
Claim 26
Dependent Claim
144 words
A fuser apparatus for electrostatographic printing comprising a fuser roll and a pressure roll forming a nip, a supply of offset preventing oil contained in a reservoir, and a donor roll for delivering the offset preventing oil to a receiver bearing a toner image, said donor roll comprising: a support, an intermediate layer disposed on the support, and an outermost layer formed from a cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, a particulate filler containing zinc oxide, and a curable aminosiloxane, said fluorocarbon thermoplastic random copolymer having subunits of: —(CH 2 CF 2 )x—, —(CF 2 CF(CF 3 )y—, and —(CF 2 CF 2 )z—, wherein x is from 1 to 40 or 60 to 80 mole percent, y is from 10 to 90 mole percent, z is from 10 to 90 mole percent, and x+y+z equals 100 mole percent.
Claim 27
Dependent Claim
15 words
The fuser apparatus of claim 24 wherein the curable aminosiloxane is an amino-functional polydimethylsiloxane copolymer.
Claim 28
Dependent Claim
25 words
The fuser apparatus of claim 25 wherein the amino-functional polydimethylsiloxane copolymer comprises amino functional units selected from the group consisting of (aminoethylaminopropyl)methyl, (aminopropyl)methyl, and (aminopropyl)dimethyl.
Claim 29
Dependent Claim
36 words
The fuser apparatus of claim 24 wherein the curable aminosiloxane has a total concentration in the layer of from about 1 to about 20 parts by weight per 100 parts of the fluorocarbon thermoplastic random copolymer.
Claim 30
Dependent Claim
36 words
The fuser apparatus of claim 24 wherein the zinc oxide has a total concentration in the layer of from about 1 to about 20 parts by weight per 100 parts of the fluorocarbon thermoplastic random copolymer.
Claim 31
Dependent Claim
32 words
The fuser apparatus of claim 24 wherein x is from 60 to 80 mole percent, y is from 10 to 90 mole percent, and z is from 10 to 90 mole percent.
Claim 32
Dependent Claim
14 words
The fuser apparatus of claim 24 wherein z is greater than 40 mole percent.
Claim 33
Dependent Claim
17 words
The fuser apparatus of claim 24 wherein the fluorocarbon thermoplastic random copolymer further comprises a fluorinated resin.
Claim 34
Dependent Claim
107 words
The fuser apparatus of claim 24 wherein said fuser roll comprises: a support, an intermediate layer disposed on the support, and an outermost layer formed from a cured composition comprising a fluorocarbon thermoplastic random copolymer, a curing agent, a particulate filler containing zinc oxide, and a curable aminosiloxane, said fluorocarbon thermoplastic random copolymer having subunits of: —(CH 2 CF 2 )x—, —(CF 2 CF(CF 3 )y—, and —(CF 2 CF 2 )z—, wherein x is from 1 to 40 or 60 to 80 mole percent, y is from 10 to 90 mole percent, z is from 10 to 90 mole percent, and x+y+z equals 100 mole percent.
Claim 35
Dependent Claim
20 words
The fuser apparatus of claim 24 further comprising a metering roll disposed between said oil reservoir and said donor roll.
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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) | 2007-04-13 | 2007-10-13 | 2008-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-13 | 2011-10-13 | 2012-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-13 | 2015-10-13 | 2016-04-13 | $7700.00 | Window Closed / Lapsed |