US4814253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner compositions with release agents therein
Assignee: Xerox Corp
•
Filing: 1987-10-29
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Granted: 1989-03-21
•
Expires: 2007-10-29
Abstract
Abstract Disclosed is an encapsulated toner composition comprised of (1) domains containing a polymer component having dispersed therein a release composition; and thereover (2) a host resin component comprised of toner resin particles and pigment particles.
Inventors
- 👤 Robert J. Gruber
- 👤 Raymond A. Yourd, III
- 👤 Shadi L. Malhotra
- 👤 John G. Vandusen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:04
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/0825
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
76 words
A free flowing toner composition with substantially no offset when selected for an imaging process wherein a release agent is absent comprised of (1) an encapsulating host component containing toner resin particles and pigment particles; and (2) domains therein comprised of a polymer component having silicone oils or mineral oils entrapped therein, and wherein the polymer component is selected from the group consisting of styrene methacrylates, styrene butadienes, styrene butadiene block copolymers, and styrene siloxane copolymers.
Claim 2
Dependent Claim
76 words
A free flowing toner composition with substantially no offset when selected for an imaging process wherein a release agent is absent comprised of (1) an encapsulating host component containing toner resin particles and pigment particles; and (2) domains therein comprised of a polymer component having silicone oils or mineral oils entrapped therein, and wherein the polymer component is selected from the group consisting of styrene methacrylates, styrene butadienes, styrene butadiene block copolymers, and styrene siloxane copolymers.
Claim 3
Dependent Claim
25 words
A composition in accordance with claim 1 wherein the domains are comprised of a styrene siloxane copolymer with about 75 percent by weight of styrene.
Claim 4
Dependent Claim
28 words
A composition in accordance with claim 1 wherein the domains are comprised of styrene butadiene copolymers with from about 80 to about 90 percent by weight of styrene.
Claim 5
Dependent Claim
15 words
A composition in accordance with claim 1 wherein the entrapped component is a silicone oil.
Claim 6
Dependent Claim
15 words
A composition in accordance with claim 1 wherein the entrapped component is a mineral oil.
Claim 7
Dependent Claim
26 words
A composition in accordance with claim 1 wherein the toner resin particles are selected from the group consisting of styrene acrylates, styrene methacrylates, and styrene butadienes.
Claim 8
Dependent Claim
24 words
A composition in accordance with claim 1 wherein the pigment particles are selected from the group consisting of carbon black, magnetites, or mixtures thereof.
Claim 9
Dependent Claim
12 words
A composition in accordance with claim 1 containing therein charge enhancing additives.
Claim 10
Dependent Claim
13 words
A composition in accordance with claim 1 containing as external components colloidal silicas.
Claim 11
Dependent Claim
19 words
A composition in accordance with claim 1 containing as external components metal salts or metal salts of fatty acids.
Claim 12
Dependent Claim
29 words
A composition in accordance with claim 1 wherein the release agent is present in an amount of from about 20 percent by weight to about 80 percent by weight.
Claim 13
Dependent Claim
14 words
A developer composition comprised of the toner composition of claim 1, and carrier particles.
Claim 14
Dependent Claim
17 words
A developer composition in accordance with claim 12 wherein the carrier particles contain a polymeric coating thereover.
Claim 15
Dependent Claim
17 words
A developer composition in accordance with claim 12 wherein the carrier particles consist of a steel core.
Claim 16
Dependent Claim
28 words
A developer composition in accordance with claim 12 wherein the polymeric coating is selected from the group consisting of fluoropolymers and terpolymers of styrene methacrylate and an organosiloxane.
Claim 17
Dependent Claim
41 words
A method for developing images which comprises forming electrostatic latent images on a photoconductive imaging member, contacting the image with the toner composition of claim 2, followed by transferring the image to a suitable substrate, and permanently affixing the image thereto.
Claim 18
Dependent Claim
22 words
A method of imaging in accordance with claim 16 wherein there results images with no release agent present on the surface thereof.
Claim 19
Dependent Claim
27 words
A method of imaging in accordance with claim 16 wherein the domains are comprised of a styrene siloxane copolymer with about 75 percent by weight of styrene.
Claim 20
Dependent Claim
30 words
A method of imaging in accordance with claim 16 wherein the domains are comprised of styrene butadiene copolymers with from about 80 to about 90 percent by weight of styrene.
Claim 21
Dependent Claim
16 words
A method of imaging in accordance with claim 16 wherein the entrapped component is silicone oil.
Claim 22
Dependent Claim
17 words
A method of imaging in accordance with claim 16 wherein the entrapped component is a mineral oil.
Claim 23
Dependent Claim
29 words
A method of imaging in accordance with claim 16 wherein the encapsulating toner resin particles are selected from the group consisting of styrene acrylates, styrene methacrylates, and styrene butadienes.
Claim 24
Dependent Claim
26 words
A method of imaging in accordance with claim 16 wherein the pigment particles are selected from the group consisting of carbon black, magnetites, or mixtures thereof.
Claim 25
Dependent Claim
31 words
A method of imaging in accordance with claim 16 wherein the release agent is present in an amount of from about 20 percent by weight to about 80 percent by weight.
Claim 26
Dependent Claim
58 words
A composition in accordance with claim 2 wherein the domain polymer is a styrene siloxane copolymer wherein the styrene segment has a weight average molecular weight of from about 20,000 to about 150,000, and the siloxane segment has a weight average molecular weight of from about 1,000 to about 75,000, and the release composition is a silicone oil.
Claim 27
Dependent Claim
25 words
A composition in accordance with claim 2 wherein the domain polymer is a styrene butadiene block copolymer, and the release agent is a mineral oil.
Claim 28
Dependent Claim
59 words
A composition in accordance with claim 2 wherein the domain polymer is a styrene butadiene copolymer wherein the styrene segment has a weight average molecular weight of from about 20,000 to about 300,000, and the butadiene segment has a weight average molecular weight of from about 30,000 to about 150,000, and wherein the release composition is a mineral oil.
Claim 29
Dependent Claim
14 words
A composition in accordance with claim 2 wherein the toner includes charge enhancing additives.
Claim 30
Dependent Claim
49 words
A composition in accordance with claim 1 formed by blending the polymer component and the silicone or mineral oils, mixing the blended product with the pigment particles and the toner resin particles, melt blending the resulting mixture, cooling the mixture, and generating particles by crushing and micronizing the mixture.
Claim 31
Dependent Claim
46 words
A composition in accordance with claim 1 formed by mixing the polymer component, the silicone or mineral oils, the pigment particles, and at least two monomers, polymerizing the monomers to form the toner resin, cooling the mixture, and generating particles by crushing and micronizing the mixtures.
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |