US5735945A
Expired / Lapsed
US
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Static charge-suppressing release agent compositions
Assignee: Eastman Kodak Co
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Filing: 1997-03-21
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Granted: 1998-04-07
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Expires: 2017-03-21
Abstract
Abstract A toner release agent composition for electrostatography comprises a polydialkoxysilane oil and a concentration of a nonionic surfactant that is effective to prevent or substantially suppress triboelectric charging of pressure and fuser members during fusion of thermoplastic toner on a receiver. The nonionic surfactant preferably comprises about 1 to 10 weight percent, more preferably about 2 to 5 weight percent, of the release agent composition.
Inventors
- 👤 Jiann H. Chen
- 👤 William J. Staudenmayer
- 👤 Muhammed Aslam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025; C; C09; C09D; C09D183/00; C09D183/04; G03G2215/00; G03G2215/20; G03G2215/2093
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A toner release agent composition for electrostatography comprising a polydialkylsiloxane oil and an effective amount of a nonionic surfactant, said nonionic surfactant being effective to prevent or substantially suppress triboelectric charging of pressure and fuser members during fusion of thermoplastic toner on a receiver wherein said nonionic surfactant is selected from the group consisting of a silicone glycol polymer, a perfluoroalkylsubstituted polyethylene glycol, and a perfluoroalkylsubstituted silane.
Claim 2
Dependent Claim
67 words
A toner release agent composition for electrostatography comprising a polydialkylsiloxane oil and an effective amount of a nonionic surfactant, said nonionic surfactant being effective to prevent or substantially suppress triboelectric charging of pressure and fuser members during fusion of thermoplastic toner on a receiver wherein said nonionic surfactant is selected from the group consisting of a silicone glycol polymer, a perfluoroalkylsubstituted polyethylene glycol, and a perfluoroalkylsubstituted silane.
Claim 3
Dependent Claim
23 words
The release agent composition of claim 1 wherein said nonionic surfactant comprises about 1 to 10 weight percent of said release agent composition.
Claim 4
Dependent Claim
22 words
The release agent composition of claim 2 wherein said surfactant comprises about 2 to 5 weight percent of said release agent composition.
Claim 5
Dependent Claim
28 words
The release agent composition of claim 1 wherein said polydialkylsiloxane oil comprises a polydimethylsiloxane fluid having a viscosity of about 50 cSt to 200,000 cSt at 25° C.
Claim 6
Dependent Claim
20 words
The release agent composition of claim 4 wherein said viscosity is about 100 cSt to 1000 cSt at 25° C.
Claim 7
Dependent Claim
15 words
The release agent composition of claim 1 wherein said polydialkylsiloxane oil includes a functional group.
Claim 8
Dependent Claim
60 words
The release agent composition of claim 1 wherein said silicone glycol polymer has the structure ##STR2## wherein R 1 is hydrogen or a lower alkyl group, x denotes zero or a positive integer, y denotes a positive integer, and a and b each denotes zero or a positive integer, with the proviso that a and b cannot both be zero.
Claim 9
Dependent Claim
22 words
The release agent composition of claim 7 wherein said silicone glycol polymer comprises about 20 to 70 weight percent ethylene oxide units.
Claim 10
Dependent Claim
25 words
The release agent composition of claim 7 wherein said silicone glycol polymer has a viscosity of about 1000 cSt to 2000 cSt at 25° C.
Claim 11
Dependent Claim
41 words
The release agent composition of claim 1 wherein said perfluoroalkylsubstituted polyethylene glycol has the structure F(CF.sub.2).sub.m CH.sub.2 CH.sub.2 (CH.sub.2 CH.sub.2 O).sub.n H wherein m and n each denotes a positive integer, m being a positive integer from about 3 to 10.
Claim 12
Dependent Claim
56 words
The release agent composition of claim 1 wherein said perfluoroalkylsubstituted silane has the structure F(CF.sub.2).sub.r CH.sub.2 CH.sub.2 Si Z.sup.1 Z.sup.2 Z.sup.3 wherein r denotes a positive integer from about 3 to 10, and Z 1 , Z 2 , and Z 3 each individually represents hydrogen, a halo substituent, or a lower alkyl or alkoxy group.
Claim 13
Dependent Claim
32 words
The release agent composition of claim 11 wherein r is about 5 to 8 and at least one of Z 1 , Z 2 , and Z 3 represents a chloro substituent.
Claim 14
Dependent Claim
39 words
The release agent composition of claim 11 wherein r is about 5 to 8 and at least one of Z 1 , Z 2 , and Z 3 represents an alkoxy group containing 1 to about 4 carbon atoms.
Claim 15
Dependent Claim
22 words
The release agent composition of claim 13 wherein Z 1 , Z 2 , and Z 3 each represents an ethoxy group.
References Cited (Backward Citations)
US4269739A
Cited
US5397384A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |