Patent US3380944A successfully refreshed from Google Patents.
US4702984A
Expired / Lapsed
US
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Polybutylene succinimide as adjuvant for electrostatic liquid developer
Assignee: EIDP Inc
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Filing: 1986-04-30
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Granted: 1987-10-27
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Expires: 2006-04-30
Abstract
Abstract Electrostatic liquid developer consisting essentially of (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles a plurality of fibers integrally extending therefrom and having an average by area particle size of less than 10 μm, (C) nonpolar liquid soluble ionic or zwitterionic compound, and (D) charge adjuvant of a polyhydroxy compound, or an aminoalcohol. (E) colorant, and (F) a polybutylene succinimide. The electrostatic liquid developers are useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
Inventors
- 👤 Lyla M. El-Sayed
- 👤 Arthur J. Taggi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:23
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/135; G03G9/13; G03G9/131; G03G9/1355
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
83 words
An improved electrostatic liquid developer 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 a plurality of fibers integrally extending therefrom and an average by area particle size of less than 10 μm. (C) a nonpolar liquid soluble ionic or zwitterionic compound, (D) a charge adjuvant taken from the group consisting of a polyhydroxy compound and an aminoalcohol compound, (E) a colorant, and (F) a polybutylene succinimide.
Claim 2
Dependent Claim
83 words
An improved electrostatic liquid developer 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 a plurality of fibers integrally extending therefrom and an average by area particle size of less than 10 μm. (C) a nonpolar liquid soluble ionic or zwitterionic compound, (D) a charge adjuvant taken from the group consisting of a polyhydroxy compound and an aminoalcohol compound, (E) a colorant, and (F) a polybutylene succinimide.
Claim 3
Dependent Claim
13 words
An electrostatic liquid developer according to claim 1 wherein Component (F) is OLOA®-1200.
Claim 4
Dependent Claim
14 words
An electrostatic liquid developer according to claim 1 wherein Component (F) is Amoco 575.
Claim 5
Dependent Claim
24 words
An electrostatic liquid developer according to claim 1 wherein Component (F) is present in an amount of 5 to 500 mg/g of developer solids.
Claim 6
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 class consisting of acrylic acid and methacrylic acid.
Claim 7
Dependent Claim
18 words
An electrostatic liquid developer according to claim 1 wherein the thermoplastic resin is an ethylene vinyl acetate copolymer.
Claim 8
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 9
Dependent Claim
29 words
An electrostatic liquid developer according to claim 7 wherein the thermoplastic resin is a copolymer of ethylene (89%)/methacrylic acid (11%) having a melt index at 190° C. of 100.
Claim 10
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 11
Dependent Claim
15 words
An electrostatic liquid developer according to claim 1 wherein component (C) is Basic Barium Petronate.
Claim 12
Dependent Claim
13 words
An electrostatic liquid developer according to claim 1 wherein component (C) is lecithin.
Claim 13
Dependent Claim
15 words
An electrostatic liquid developer according to claim 1 wherein component (D) is a polyhydroxy compound.
Claim 14
Dependent Claim
15 words
An electrostatic liquid developer according to claim 1 wherein component (D) is an aminoalcohol compound.
Claim 15
Dependent Claim
13 words
An electrostatic liquid developer according to claim 13 wherein the aminoalcohol is triisopropanolamine.
Claim 16
Dependent Claim
27 words
An electrostatic liquid developer according to claim 1 containing about 1% to about 60% by weight of a colorant based on the total weight of developer solids.
Claim 17
Dependent Claim
14 words
An electrostatic liquid developer according to claim 15 wherein the colorant is a pigment.
Claim 18
Dependent Claim
29 words
An electrostatic liquid developer according to claim 16 wherein the pigment is present an amount of 1% to 30% by weight based on the total weight of developer solids.
Claim 19
Dependent Claim
14 words
An electrostatic liquid developer according to claim 15 wherein the colorant is a dye.
Claim 20
Dependent Claim
16 words
An electrostatic liquid developer according to claim 1 wherein a fine particle size oxide is present.
Claim 21
Dependent Claim
137 words
An improved electrostatic liquid developer consisting essentially of: (A) a nonpolar liquid having a Kauri-butanol value of less than 30, 85.0 to 99.9% by weight based on the weight of the developer; (B) particles having an average by area particle size less than 10 μm of a copolymer of ethylene (89%)/methacrylic acid (11%) having a melt index at 190° C. of 100 wherein a plurality of fibers integrally extend from said particles: (C) Basic Barium Petronate, 1 to 1000 mg/g developer solids; (D) ethylene glycol, 1 to 1000 mg/g developer solids; (E) a black cyan, magenta or yellow colorant, 1 to 60% by weight based on the total weight of developer solids; and (F) polybutylene succinimide, 5 to 500 mg/g developer solids, the total weight of developer solids being 0.1 to 15% by weight of the developer.
Claim 22
Dependent Claim
137 words
An improved electrostatic liquid developer consisting essentially of: (A) a nonpolar liquid having a Kauri-butanol value of less than 30, 85.0 to 99.9% by weight based on the weight of the developer; (B) particles having an average by area particle size less than 10 μm of a copolymer of ethylene (89%)/methacrylic acid (11%) having a melt index at 190° C. of 100 wherein a plurality of fibers integrally extend from said particles: (C) Basic Barium Petronate, 1 to 1000 mg/g developer solids; (D) ethylene glycol, 1 to 1000 mg/g developer solids; (E) a black cyan, magenta or yellow colorant, 1 to 60% by weight based on the total weight of developer solids; and (F) polybutylene succinimide, 5 to 500 mg/g developer solids, the total weight of developer solids being 0.1 to 15% by weight of the developer.
Claim 23
Dependent Claim
20 words
An electrostatic liquid developer according to claim 20 wherein Basic Barium Petronate is replaced with a like amount of lecithin.
Claim 24
Dependent Claim
20 words
An electrostatic liquid developer according to claim 20 wherein the ethylene glycol is replaced with a like amount of triisopropanolamine.
References Cited (Backward Citations)
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 |