US4707429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic soap as adjuvant for electrostatic liquid developer
Assignee: EIDP Inc
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Filing: 1986-04-30
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Granted: 1987-11-17
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Expires: 2006-04-30
Abstract
Abstract Electrostatic liquid developer consisting essentially of (A) nonpolar liquid having Kauri-butanol value less than 30, present in major amount, (B) thermoplastic resin particles having a metallic soap as defined dispersed therein and average particle size by area being less than 10 mu m, and (C) nonpolar liquid soluble ionic or zwitterionic charge director compound. Optionally a colorant and charge adjuvant are present. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
Inventors
- 👤 Torence J. Trout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/135; G03G9/1355; G03G9/097
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
64 words
An electrostatic liquid developer having improved charging characteristics consisting essentially of (A) a nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount. (B) thermoplastic resin particles having dispersed therein a metallic soap, the resin particles having an average by areas particle size of less than 10μm, and (C) a nonpolar liquid soluble ionic or zwitterionic charge director compound.
Claim 2
Dependent Claim
64 words
An electrostatic liquid developer having improved charging characteristics consisting essentially of (A) a nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount. (B) thermoplastic resin particles having dispersed therein a metallic soap, the resin particles having an average by areas particle size of less than 10μm, and (C) a nonpolar liquid soluble ionic or zwitterionic charge director compound.
Claim 3
Dependent Claim
27 words
An electrostatic liquid developer according to claim 1 wherein the metallic soap is a polyvalent metal salt of a carboxylic acid of at least 6 carbon atoms.
Claim 4
Dependent Claim
34 words
An electrostatic liquid developer according to claim 2 wherein the polyvalent metal is selected from the group consisting of barium, calcium, magnesium, strontium, zinc, cadmium, aluminum, gallium, lead, chromium, manganese, iron, nickel, and cobalt.
Claim 5
Dependent Claim
54 words
An electrostatic liquid developer according to claim 1 wherein component (A) is present in 85 to 99.9% by weight, based on the total weight of liquid developer, the total weight of developer solids is 0.1 to 15.0% by weight, and component (C) is present in an amount of 1 to 1000 mg/g developer solids.
Claim 6
Dependent Claim
29 words
An electrostatic liquid developer according to claim 4 wherein the metallic soap is present in 0.01 to 60% by weight based on the total weight of the developer solids.
Claim 7
Dependent Claim
27 words
An electrostatic liquid developer according to claim 1 containing up to about 60 percent by weight of a colorant based on the total weight of developer solids.
Claim 8
Dependent Claim
14 words
An electrostatic liquid developer according to claim 6 wherein the colorant is a pigment.
Claim 9
Dependent Claim
14 words
An electrostatic liquid developer according to claim 6 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 an additional compound is present which is an adjuvant selected from the group consisting of polyhydroxy compound, aminoalcohol, polybutylene succinimide, and an aromatic hydrocarbon.
Claim 12
Dependent Claim
33 words
An electrostatic liquid developer according to claim 6 wherein an additional compound is present which is an adjuvant selected from the group consisting of polyhydroxy compound, aminoalcohol, polybutylene succinimide, and an aromatic hydrocarbon.
Claim 13
Dependent Claim
15 words
An electrostatic liquid developer according to claim 10 wherein a polyhydroxy adjuvant compound is present.
Claim 14
Dependent Claim
15 words
An electrostatic liquid developer according to claim 10 wherein an aminoalcohol adjuvant compound is present.
Claim 15
Dependent Claim
16 words
An electrostatic liquid developer according to claim 10 wherein a polybutylene succinimide adjuvant compound is present.
Claim 16
Dependent Claim
16 words
An electrostatic liquid developer according to claim 10 wherein an aromatic hydrocarbon adjuvant compound is present.
Claim 17
Dependent Claim
15 words
An electrostatic liquid developer according to claim 13 wherein the aminoalcohol adjuvant compound is triisopropanolamine.
Claim 18
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 19
Dependent Claim
14 words
An electrostatic liquid developer according to claim 1 wherein the thermoplastic resin is polystyrene.
Claim 20
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 21
Dependent Claim
43 words
An electrostatic liquid developer according to claim 6 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 22
Dependent Claim
29 words
An electrostatic liquid developer according to claim 19 wherein the thermoplastic resin is a copolymer of ethylene (89%)/methacrylic acid (11%) having a melt index at 190° C. of 100.
Claim 23
Dependent Claim
22 words
An electrostatic liquid developer according to claim 1 wherein the particles have an average by area particle size of less than 5μm.
Claim 24
Dependent Claim
15 words
An electrostatic liquid toner according to claim 1 wherein component (C) is Basic Barium Petronate.
Claim 25
Dependent Claim
13 words
An electrostatic liquid toner according to claim 1 wherein component (C) is lecithin.
References Cited (Backward Citations)
US3417019A
Cited
US3542682A
Cited
US3529581A
Cited
DE2428809A1
Cited
SU660012A1
Cited
JPS51107833A
Cited
US4268597A
Cited
JPS5357039A
Cited
JPS5379541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |