US4770968A
Expired / Lapsed
US
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Polysiloxane-styrene-butadiene terpolymers and use in toners
Assignee: Xerox Corp
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Filing: 1987-07-27
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Granted: 1988-09-13
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Expires: 2007-07-27
Abstract
Abstract A branched polysiloxane styrene butadiene polymer of the following formula ##STR1## wherein m is a number of from about 2 to about 10; z is the number 3,4 or 5; n is a number of from about 10 to about 1,000; k, l and o are weight fraction numbers with k being from about 0.35 to about 0.95, l being from 0.1 to about 0.2, and o is from about 0.05 to about 0.5; R is an aromatic substituent, alkyl-CR"C(O)O, and alkylene-CR"C(O)O, wherein R" is hydrogen or an alkyl substituent, and R' is an alkyl substituent or a trialkylsilylether substituent.
Inventors
- 👤 Michael K. Georges
- 👤 Lupu Alexandru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:04
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/20; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/068; C08G77/42; C08G77/442; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08773
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
106 words
A branched polysiloxane styrene butadiene polymer of the following formula ##STR3## wherein m is a number of from about 2 to about 10; z is the number 3, 4 or 5; n is a number of from about 10 to about 1,000; k, l and o are weight fraction numbers with k being from about 0.35 to about 0.95, x and y are alkyl, l being from 0.1 to about 0.2, and o is from about 0.05 to about 0.5; R is an aromatic substituent, alkyl-CR"C(O)O, and alkylene-CR"C(O)O, wherein R" is hydrogen or an alkyl substituent, and R' is an alkyl substituent or a trialkylsilylether substituent.
Claim 2
Dependent Claim
106 words
A branched polysiloxane styrene butadiene polymer of the following formula ##STR3## wherein m is a number of from about 2 to about 10; z is the number 3, 4 or 5; n is a number of from about 10 to about 1,000; k, l and o are weight fraction numbers with k being from about 0.35 to about 0.95, x and y are alkyl, l being from 0.1 to about 0.2, and o is from about 0.05 to about 0.5; R is an aromatic substituent, alkyl-CR"C(O)O, and alkylene-CR"C(O)O, wherein R" is hydrogen or an alkyl substituent, and R' is an alkyl substituent or a trialkylsilylether substituent.
Claim 3
Dependent Claim
34 words
A polysiloxane in accordance with claim 1 wherein R is an aromatic substituent of from about 6 to about 24 carbon atoms, or a carboxylate substituent of from about 3 to about 10 carbons.
Claim 4
Dependent Claim
18 words
A polysiloxane in accordance with claim 1 wherein m is the number 2, 3, 5, 7 or 9.
Claim 5
Dependent Claim
19 words
A polysiloxane in accordance with claim 1 wherein n is a number of from about 10 to about 800.
Claim 6
Dependent Claim
20 words
A polysiloxane in accordance with claim 1 wherein the alkyl substituents contain from about 1 to about 10 carbon atoms.
Claim 7
Dependent Claim
23 words
A polysiloxane in accordance with claim 5 wherein the alkyl substituents are selected from the group consisting of methyl, ethyl, propyl, and butyl.
Claim 8
Dependent Claim
22 words
A polysiloxane in accordance with claim 1 wherein the R' substituents are selected from the group consisting of methyl, n-butyl and trimethylsilylether.
Claim 9
Dependent Claim
23 words
A polysiloxane in accordance with claim 1 wherein the weight average molecular weight of the polysiloxanes is from about 90,000 to about 200,000.
Claim 10
Dependent Claim
26 words
A polysiloxane in accordance with claim 1 wherein the branched polysiloxane styrene butadiene ternary polymer contains from about 2 percent to about 40 percent of polysiloxane.
Claim 11
Dependent Claim
22 words
A polysiloxane in accordance with claim 1 wherein the average molecular weight of the polysiloxane branches is from about 4,000 to 25,000.
Claim 12
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 3.
Claim 13
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 3.
Claim 14
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 4.
Claim 15
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 4.
Claim 16
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 5.
Claim 17
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 5.
Claim 18
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 6.
Claim 19
Dependent Claim
10 words
The branched polysiloxane of the formula represented in FIG. 6.
Claim 20
Dependent Claim
13 words
A toner composition comprised of the polysiloxane of claim 1 and pigment particles.
Claim 21
Dependent Claim
23 words
A toner composition in accordance with claim 15 wherein the pigment particles are selected from the group consisting of carbon black and magnetites.
Claim 22
Dependent Claim
28 words
A toner composition in accordance with claim 15 wherein the pigment particles are selected from the group consisting of cyan, magenta, yellow, red, blue, green, and mixtures thereof.
Claim 23
Dependent Claim
30 words
A toner composition in accordance with claim 15 wherein the pigment particles are present in an amount of from about 1 percent by weight to about 20 percent by weight.
Claim 24
Dependent Claim
30 words
A toner composition in accordance with claim 16 wherein magnetite pigment particles are present in an amount of from about 10 percent by weight to about 70 percent by weight.
Claim 25
Dependent Claim
21 words
A toner composition in accordance with claim 15 wherein the branched polysiloxane resin is represented by the formula of FIG. 3.
Claim 26
Dependent Claim
21 words
A toner composition in accordance with claim 15 wherein the branched polysiloxane resin is represented by the formula of FIG. 4.
Claim 27
Dependent Claim
21 words
A toner composition in accordance with claim 15 wherein the branched polysiloxane resin is represented by the formula of FIG. 5.
Claim 28
Dependent Claim
21 words
A toner composition in accordance with claim 15 wherein the branched polysiloxane resin is represented by the formula of FIG. 6.
Claim 29
Dependent Claim
15 words
A toner composition in accordance with claim 15 further including therein colloidal silica additive particles.
Claim 30
Dependent Claim
23 words
A toner composition in accordance with claim 15 further including therein metal salts or metal salts of a fatty acid as additive particles.
Claim 31
Dependent Claim
19 words
A toner composition in accordance with claim 15 wherein there is further included in the toner charge enhancing additives.
Claim 32
Dependent Claim
13 words
A developer composition comprised of the toner of claim 15 and carrier particles.
Claim 33
Dependent Claim
16 words
A developer composition in accordance with claim 27 wherein the carrier particles contain a coating thereover.
Claim 34
Dependent Claim
26 words
A developer composition in accordance with claim 27 wherein the carrier particles consist of a core selected from the group consisting of steel, iron, and ferrites.
Claim 35
Dependent Claim
16 words
A developer composition in accordance with claim 28 wherein the coating is selected from polymeric components.
Claim 36
Dependent Claim
28 words
A developer composition in accordance with claim 30 wherein the polymers are selected from the group consisting of fluorinated polymers, polymethyl methacrylates, and styrene methyl triethoxy silane terpolymers.
Claim 37
Dependent Claim
45 words
A method of imaging which comprises the formation of an electrostatic latent image on an imaging member, followed by development of this image with the toner composition of claim 15, subsequently transferring this image to a suitable substrate, and thereafter permanently affixing the image thereto.
Claim 38
Dependent Claim
20 words
A method of imaging in accordance with claim 32 wherein fixing is accomplished in the absence of a release fluid.
Claim 39
Dependent Claim
22 words
A method of imaging in accordance with claim 32 wherein the polysiloxane toner resin is represented by the formula of FIG. 3.
Claim 40
Dependent Claim
22 words
A method of imaging in accordance with claim 32 wherein the polysiloxane toner resin is represented by the formula of FIG. 4.
Claim 41
Dependent Claim
22 words
A method of imaging in accordance with claim 32 wherein the polysiloxane toner resin is represented by the formula of FIG. 5.
Claim 42
Dependent Claim
22 words
A method of imaging in accordance with claim 32 wherein the polysiloxane toner resin is represented by the formula of FIG. 6.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |