Patent US4876169A successfully refreshed from Google Patents.
US4876169A
Expired / Lapsed
US
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Toner compositions with release additives therein
Assignee: Xerox Corp
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Filing: 1988-10-24
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Granted: 1989-10-24
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Expires: 2008-10-24
Abstract
Abstract A toner composition comprised of particles of a polyester with siloxane block segments therein, which particles have incorporated therein release additives.
Inventors
- 👤 Robert J. Gruber
- 👤 Raymond A. Yourd, III
- 👤 Shadi L. Malhotra
- 👤 Robert A. Nelson
- 👤 Carol A. Fox
- 👤 Thomas R. Hoffend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:04
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08773; G03G9/08784; G03G9/08788
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
43 words
A toner composition for utilization in electrophotographic imaging systems wherein release management devices are avoided, which compositions are comprised of pigment particles and resin particles comprised of a polyester with siloxane block segments therein, which polyester has incorporated therein silicone release fluid additives.
Claim 2
Dependent Claim
43 words
A toner composition for utilization in electrophotographic imaging systems wherein release management devices are avoided, which compositions are comprised of pigment particles and resin particles comprised of a polyester with siloxane block segments therein, which polyester has incorporated therein silicone release fluid additives.
Claim 3
Dependent Claim
31 words
A toner composition in accordance with claim 1 wherein the polyester resin particles are present in an amount of from about 10 percent by weight to about 90 percent by weight.
Claim 4
Dependent Claim
30 words
A toner composition in accordance with claim 1 wherein the pigment particles are present in an amount of from about 1 percent by weight to about 25 percent by weight.
Claim 5
Dependent Claim
19 words
A toner composition in accordance with claim 1 wherein the polyester is poly (34.1/63.4/2.5) 1,2-propylene terephthalate/1,3-butylene terephthalate/pentaerythritol terephthalate-block-polysiloxane terephthalate.
Claim 6
Dependent Claim
17 words
A toner composition in accordance with claim 1 wherein the polyester is polyalkylene terephthalate/butylene terephthalate/pentaerythritol terephthalate-block-polysiloxane terephthalate.
Claim 7
Dependent Claim
15 words
A toner composition in accordance with claim 1 wherein the pigment particles are carbon black.
Claim 8
Dependent Claim
17 words
A toner composition in accordance with claim 1 wherein the release additive is comprised of silicone oils.
Claim 9
Dependent Claim
12 words
A toner composition in accordance with claim 1 containing charge enhancing additives.
Claim 10
Dependent Claim
34 words
A toner composition in accordance with claim 8 wherein the charge enhancing additives are selected from the group consisting of alkyl pyridinium halides, organic sulfate and sulfonate compositions; and distearyl dimethyl ammonium methyl sulfate.
Claim 11
Dependent Claim
27 words
A toner composition in accordance with claim 1 containing surface additives selected from the group consisting of colloidal silicas, metal salts, and metal salts of fatty acids.
Claim 12
Dependent Claim
14 words
A developer composition comprised of the toner composition of claim 1 and carrier particles.
Claim 13
Dependent Claim
16 words
A developer composition in accordance with claim 11 wherein the carrier particles contain thereover a coating.
Claim 14
Dependent Claim
32 words
A developer composition in accordance with claim 12 wherein the coating is a polymer selected from the group consisting of polyvinylidene fluoride, polymethyl methacrylate, vinylchloride-chlorotrifluoroethylene, and styrene methyl methacrylate triethoxy silane terpolymer.
Claim 15
Dependent Claim
24 words
A developer composition in accordance with claim 11 wherein the polyester toner resin particles are comprised of poly (34.1/63.4/2.5) 1,2-propylene terephthalate/1,3-butylene terephthalate/pentaerythritol terephthalate-block-polysiloxane terephthalate.
Claim 16
Dependent Claim
21 words
A developer composition in accordance with claim 11 wherein the polyester toner resin particles are comprised of polyalkylene terephthalate/butylene terephthalate/pentaerythritol terephthalate-block-polysiloxaneterephthalate.
Claim 17
Dependent Claim
17 words
A developer composition in accordance with claim 11 wherein the release additives are comprised of silicone oils.
Claim 18
Dependent Claim
38 words
A toner composition in accordance with claim 1 wherein the polyester is prepared by the condensation polymerization of a dialkyl terephthalate with a dialcohol, which polymerization is accomplished by heating said components in the presence of a catalyst.
Claim 19
Dependent Claim
26 words
A toner composition comprised of resin particles comprised of a polyester with siloxane block segments therein, which polyester has incorporated therein release additives, and pigment particles.
Claim 20
Dependent Claim
26 words
A toner composition comprised of resin particles comprised of a polyester with siloxane block segments therein, which polyester has incorporated therein release additives, and pigment particles.
Claim 21
Dependent Claim
97 words
A process for enabling the development of images in electrostatographic imaging processes wherein costly release management components are avoided, which comprises (1) providing the toner compositions of claim 1; (2) incorporating the aforementioned toner composition in a xerographic imaging device; (3) forming a latent electrostatic image on a photoreceptor member contained in said device; (4) developing the image with said toner composition; (5) transferring the image to a suitable substrate, and subsequently affixing the image thereto by heating wherein the release fluid present in the toner polymer is transported in a controlled manner to a fuser roll.
Claim 22
Dependent Claim
67 words
A process for the development of images which comprises forming a latent image on an imaging member containing an electrophotographic imaging apparatus; developing this image with the toner composition of claim 1; transferring the image to a suitable substrate; and subsequently affixing the image thereto by heating, wherein the release fluid present in the toner polyester polymer is transported in a controlled manner to a fuser roll.
Claim 23
Dependent Claim
21 words
A toner composition comprised of particles of a polyester with siloxane block segments therein, which polyester has incorporated therein release additives.
Claim 24
Dependent Claim
21 words
A toner composition comprised of particles of a polyester with siloxane block segments therein, which polyester has incorporated therein release additives.
Claim 25
Dependent Claim
28 words
A toner composition according to claim 21 wherein the siloxanes selected for formation of the polyester is of Formula I wherein n represents the number of repeating units.
Claim 26
Dependent Claim
71 words
A toner composition according to claim 21 wherein the polyester is of the following Formula II ##STR6## where x is from 1 to about 30; y is from 1 to about 10; A and B are randomly polymerized together; d and e are 0.01 to 0.99 with the sum of d+e being equal to 1; M, V, N and W are organic components; and n represents the number of repeating units.
Claim 27
Dependent Claim
28 words
A toner composition according to claim 1 wherein the siloxanes selected for formation of the polyester is of Formula I wherein n represents the number of repeating units.
Claim 28
Dependent Claim
17 words
A toner composition according to claim 2 wherein the polyester is of the Formula of claim 23.
Claim 29
Dependent Claim
10 words
A toner composition according to claim 21 containing pigment particles.
Claim 30
Dependent Claim
10 words
A toner composition according to claim 22 containing pigment particles.
Claim 31
Dependent Claim
10 words
A toner composition according to claim 23 containing pigment particles.
Claim 32
Dependent Claim
15 words
A toner composition comprised of a polyester with siloxane black segments therein and release additives.
Claim 33
Dependent Claim
15 words
A toner composition comprised of a polyester with siloxane black segments therein and release additives.
Claim 34
Dependent Claim
11 words
A toner composition in accordance with claim 29 containing pigment particles.
Claim 35
Dependent Claim
13 words
A developer composition comprised of the toner of claim 29 and carrier particles.
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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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |