Patent US4702985A successfully refreshed from Google Patents.
US4702985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminoalcohols as adjuvant for liquid electrostatic developers
Assignee: EIDP Inc
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Filing: 1986-04-28
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Granted: 1987-10-27
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Expires: 2006-04-28
Abstract
Abstract Electrostatic liquid developer having improved charging characteristics comprising (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles having an average by area particle size of less than 10 μm, (C) nonpolar liquid soluble ionic or zwitterionic compound, and (D) at least one aminoalcohol compound. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
Inventors
- 👤 James R. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:41
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131; G03G9/135; G03G9/1355
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
58 words
An electrostatic liquid developer having improved charging characteristics consisting essentially of: (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles having an average by area particle size of less than 10 μm, (C) nonpolar liquid soluble ionic or zwitterionic compound, and (D) at least one aminoalcohol compound.
Claim 2
Dependent Claim
58 words
An electrostatic liquid developer having improved charging characteristics consisting essentially of: (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles having an average by area particle size of less than 10 μm, (C) nonpolar liquid soluble ionic or zwitterionic compound, and (D) at least one aminoalcohol compound.
Claim 3
Dependent Claim
13 words
An electrostatic liquid developer according to claim 1 wherein the aminoalcohol is triisopropanolamine.
Claim 4
Dependent Claim
17 words
An electrostatic liquid developer according to claim 1 wherein the aminoalcohols are mixture of triisopropanolamine and triethanolamine.
Claim 5
Dependent Claim
66 words
An electrostatic liquid developer according to claim 1 wherein component (A) is present in 99.9 to 85% by weight, component (B) is present in 0.1 to 15% by weight, based on the total weight of the developer, component (C) is present in an amount of 1 to 1000 mg/g developer solids, and component (D) is present in an amount of 1 to 1000 mg/g developer solids.
Claim 6
Dependent Claim
24 words
An electrostatic liquid developer according to claim 1 containing up to about 60% by weight of a colorant based on the weight of resin.
Claim 7
Dependent Claim
14 words
An electrostatic liquid developer according to claim 5 wherein the colorant is a pigment.
Claim 8
Dependent Claim
28 words
An electrostatic liquid developer according to claim 6 wherein the percent pigment in the thermoplastic resin is 1% to 60% by weight based on the weight of resin.
Claim 9
Dependent Claim
14 words
An electrostatic liquid developer according to claim 5 wherein the colorant is a dye.
Claim 10
Dependent Claim
16 words
An electrostatic liquid developer according to claim 1 wherein a fine particle size oxide is present.
Claim 11
Dependent Claim
33 words
An electrostatic liquid developer according to claim 1 wherein the thermoplastic resin is a copolymer of ethylene and an α,β-ethylenically unsaturated acid selected from the group consisting of acrylic acid and methacrylic acid.
Claim 12
Dependent Claim
43 words
An electrostatic liquid developer according to claim 1 wherein the thermoplastic resin is a copolymer of ethylene (80 to 99.9%)/acrylic or methacrylic acid (20 to 0%)/alkyl ester of acrylic or methacrylic acid wherein alkyl is 1 to 5 carbon atoms (0 to 20%).
Claim 13
Dependent Claim
29 words
An electrostatic liquid developer according to claim 10 wherein the thermoplastic resin is a copolymer of ethylene (89%)/methacrylic acid (11%) having a melt index at 190° C. of 100.
Claim 14
Dependent Claim
23 words
An electrostatic liquid developer according to claim 1 wherein the particles have an average by area particle size of less than 5 μm.
Claim 15
Dependent Claim
52 words
An electrostatic liquid developer having improved charging characteristics comprising: (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount. (B) thermoplastic resin particles having an average by area particle size of less than 10 mm, (C) Basic Barium Petronate, and (D) at least one aminoalcohol compound.
Claim 16
Dependent Claim
52 words
An electrostatic liquid developer having improved charging characteristics comprising: (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount. (B) thermoplastic resin particles having an average by area particle size of less than 10 mm, (C) Basic Barium Petronate, and (D) at least one aminoalcohol compound.
Claim 17
Dependent Claim
49 words
An electrostatic liquid developer having improved charging characteristics comprising: (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles having an average by area particle size of less than 10mm, (C) lecithin, and (D) at least one aminoalcohol compound.
Claim 18
Dependent Claim
49 words
An electrostatic liquid developer having improved charging characteristics comprising: (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles having an average by area particle size of less than 10mm, (C) lecithin, and (D) at least one aminoalcohol compound.
Claim 19
Dependent Claim
14 words
An electrostatic liquid developer according to claim 1 wherein the amino alcohol is triethanolamine.
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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) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |