# US 5,348,831 A · Polyester-imide toner and developer compositions

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- Number: US 5,348,831 A
- Document ID: US5348831A
- Status: Granted
- Kind: A
- Application number: 08/144,964
- Filed: 1993-10-28
- Granted: 1994-09-20
- Earliest claimed: 1993-10-28
- Assignees: Xerox Corporation
- Inventors: Guerino G. Sacripante; Melvin D. Croucher; Stephan V. Drappel
- Web page: https://patentgrep.com/patent/US5348831A

## CPC

- C08G 73/16: Polyester-imides
- G03G 9/08755: {Polyesters}
- G03G 9/08768: {Other polymers having nitrogen in the main chain, with or without oxygen or carbon only}
- G03G 9/08788: {Block polymers}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A toner composition comprised of pigment, and a polyesterimide resin of the formula ##STR1## wherein n represents the number of segments present and is a number of from about 10 to about 10,000; R' is alkyl or alkylene; and R is independently selected from the group consisting of an oxyalkylene and polyoxyalkylene.

## Claims

### Claim 1

A toner comprised of pigment, and a polyester-imide resin of the formula ##STR9## wherein n represents the number of segments present and is a number of from about 10 to about 10,000; R' is alkyl or alkylene; and R is independently selected from the group consisting of an oxyalkylene and polyoxyalkylene.

### Claim 2 (depends on 1)

A toner in accordance with claim 1 wherein R' is alkyl with from1 to about 25 carbon atoms, or alkylene with from 1 to about 25 carbon atoms.

### Claim 3 (depends on 1)

A toner in accordance with claim 1 wherein R' is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, stearyl, lauryl, isopropyl, isobutyl, isopentyl or mixtures thereof.

### Claim 4 (depends on 1)

A toner in accordance with claim 1 wherein R is an oxyalkylene selected from the group consisting of diethyleneoxide, dipropyleneoxide, triethyleneoxide, polypropyleneoxide, and mixtures thereof.

### Claim 5 (depends on 1)

A toner in accordance with claim 1 wherein the polyesterimide resin is selected from the group consisting of poly(oxyethyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-dipropyloxy), poly(oxyethyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-tripropyloxy), poly(oxyethyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-tetrapropyloxy), poly(oxyethyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-pentapropyloxy), poly(oxypropyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-dipropyloxy), poly(oxypropyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-tripropyloxy), poly(oxypropyloxy-bis(4,4'-carbonyl , 1,2,1',2'-phthalimidyl)tetrapropyloxy), copoly(oxyethyloxy-bis(4,4'-carbonyl, 1,2,1',2'-phthalimidyl)-tripropyloxy) copoly(oxyethyloxy-bis(4,4'-carbonyl , 1,2,1',2'-phthalimidyl)-pentapropyloxy), and mixtures thereof.

### Claim 6 (depends on 1)

A toner in accordance with claim 1 wherein the polyesterimide has a M.sub.n of from about 1,500 to about 20,000, and a M.sub.w of from about 2,500 to about 100,000.

### Claim 7 (depends on 1)

A toner in accordance with claim 1 which possesses a low fixing temperature of from about 120.degree. C. to about 145.degree. C., and a broad fusing latitude of from about 40.degree. C. to about 120.degree. C.

### Claim 8 (depends on 1)

A toner composition in accordance with claim 1 with a glass transition temperature thereof of from about 50.degree. C. to about 65.degree. C.

### Claim 9 (depends on 1)

A toner composition in accordance with claim 1 with a relative humidity sensitivity of from about 1.01 to about 2.3.

### Claim 10 (depends on 1)

A toner composition in accordance with claim 1 further including a charge enhancing additive incorporated into the toner, or present on the surface of the toner.

### Claim 11 (depends on 1)

A toner composition in accordance with claim 1 further containing a wax component with a weight average molecular weight of from about 1,000 to about 10,000.

### Claim 12 (depends on 1)

A toner composition in accordance with claim 1 further containing as external additives metal salts of a fatty acid, metal oxides, colloidal silicas, or mixtures thereof.

### Claim 13 (depends on 1)

A toner composition in accordance with claim 1 wherein the pigment is carbon black, magnetites, or mixtures thereof, cyan, magenta, yellow, red, blue, green, brown, or mixtures thereof, which pigment is present in an amount of from about 2 to about 15 percent by weight of toner.

### Claim 14 (depends on 1)

A developer composition comprised of the toner composition of claim 1 and carrier particles.

### Claim 15 (depends on 14)

A developer composition in accordance with claim 14 wherein the carrier particles are comprised of ferrites, steel, or an iron powder with an optional coating, or mixture of coatings.

### Claim 16 (depends on 1)

A method of imaging which comprises formulating an electrostatic latent image on a negatively charged photoreceptor, affecting development thereof with the toner composition of claim 1, and thereafter transferring the developed image to a suitable substrate.