EP0633142A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for alleviating bleed and improving color in printed elements
Assignee: EIDP Inc
•
Filing: 1994-06-24
•
Granted: —
•
Expires: 2014-06-24
Abstract
Abstract A process for alleviating bleed and improving color in printed elements comprises applying an anionic printing liquid and a cationic printing liquid to a substrate adjacent to one another, wherein at least one of the printing liquids contains a polymer and reacting the anionic and cationic printing liquids with one another; wherein the color integrity of the anionic and cationic printing liquids is maintained.
Inventors
- 👤 John Lawrence Stoffel
- 👤 Harry Joseph Spinelli
- 👤 Arthur Charles Shor
- 👤 Sheau-Hwa Ma
- 👤 Howard Matrick
- 👤 Mark Leland Choy
- 👤 Loren Eugene Johnson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 11:03
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2107
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
77 words
A process for creating a multicolor printed element having reduced color bleed comprising: (a) providing at least one anionic ink and at least one cationic ink, both of said inks comprising an aqueous medium and a colorant, at least one of said inks containing approximately 0.1 to 30% by weight of a polymer having the same ionic character as said ink; and (b) applying said anionic and cationic inks in contact with each other on said element.
Claim 2
Dependent Claim
19 words
The process of claim 1, wherein said polymer is a homopolymer, copolymer, block polymer, branched polymer or graft polymer.
Claim 3
Dependent Claim
19 words
The process of claim 2 wherein said polymer has an ethylenically unsaturated backbone and a molecular weight below 20,000.
Claim 4
Dependent Claim
14 words
The process of claim 3 wherein said polymer also serves as a pigment dispersant.
Claim 5
Dependent Claim
90 words
The process of claim 3 wherein said cationic ink contains a cationic polymer having at least one pendant ionic moity of the formula: wherein A is selected from N, P, and S; R₁, R₂ and R₃ are independently selected from H, alkyl or alkyl ether of 1-20 carbon atoms, aryl or alkylaryl of 1-10 carbon atoms, with the proviso that R₃ is not present when A is S; and wherein X is selected from the group consisting of halides, conjugate bases of organic acids, and conjugate bases of inorganic acids.
Claim 6
Dependent Claim
14 words
The process of claim 5, wherein the cationic polymer is an AB block polymer.
Claim 7
Dependent Claim
41 words
The process of claim 6, wherein the cationic AB block polymer comprises an A block prepared from homopolymers or copolymers of methyl methacrylate and butyl methacrylate and a B block prepared from homopolymers or copolymers of dimethylaminoethyl methacrylate and diethylaminoethyl methacrylate.
Claim 8
Dependent Claim
44 words
The process of claim 3 wherein said anionic ink contains an anionic polymer having at least one pendant ionic moity of the formula: -CO₂Z or -SO₃Z, wherein Z is selected from conjugate acids of organic bases, alkali metal ions, ammonium ion, and tetraalkylammonium ions.
Claim 9
Dependent Claim
14 words
The process of claim 8, wherein the anionic polymer comprises an AB block polymer.
Claim 10
Dependent Claim
36 words
The process of claim 9, wherein said anionic AB block polymer comprises an A block prepared from homopolymers or copolymers of methyl methacrylate and butyl methacrylate and a B block prepared from homopolymers of methacrylic acid.
Claim 11
Dependent Claim
21 words
The process of claim 1 further comprising the step of applying additional printing liquids adjacent to the anionic or cationic inks.
Claim 12
Dependent Claim
17 words
The process of claim 1, wherein said cationic printing liquid contains a water soluble alkyltrimethyl ammonium salt.
Claim 13
Dependent Claim
13 words
The process of claim 12, wherein said ammonium salt is dodecyltrimethyl ammonium chloride.
Claim 14
Dependent Claim
24 words
The process of claim 1, wherein said anionic printing liquid contains a sulfonate salt selected from the group of dialkylsulfosuccinates and alkyl naphthalene sulfonates.
Claim 15
Dependent Claim
16 words
The process of claim 1, wherein said anionic ink and cationic inks abut on said element.
Claim 16
Dependent Claim
16 words
The process of claim 1, wherein said anionic and cationic inks are in an overlay relationship.
Claim 17
Dependent Claim
65 words
An inkset adapted for use together to minimize bleed, said ink set comprising: (a) at least one anionic ink comprising an aqueous medium and a colorant, and (b) at least one cationic ink comprising an aqueous medium and a colorant, wherein at least one of said inks contains approximately 0.1 to 30% by weight of a polymer having the same ionic character as said ink.
Claim 18
Dependent Claim
19 words
The inkset of claim 17, wherein said polymer is a homopolymer, copolymer, block polymer, branched polymer or graft polymer.
Claim 19
Dependent Claim
19 words
The inkset of claim 18, wherein said polymer has an ethylenically unsaturated backbone and a molecular weight below 20,000.
Claim 20
Dependent Claim
90 words
The inkset of claim 19, wherein said cationic ink contains a cationic polymer having at least one pendant ionic moity of the formula: wherein A is selected from N, P, and S; R₁, R₂ and R₃ are independently selected from H, alkyl or alkyl ether of 1-20 carbon atoms, aryl or alkylaryl of 1-10 carbon atoms, with the proviso that R₃ is not present when A is S; and wherein X is selected from the group consisting of halides, conjugate bases of organic acids, and conjugate bases of inorganic acids.
Claim 21
Dependent Claim
14 words
The inkset of claim 20, wherein the cationic polymer is an AB block polymer.
Claim 22
Dependent Claim
41 words
The inkset of claim 21, wherein the cationic AB block polymer comprises an A block prepared from homopolymers or copolymers of methyl methacrylate and butyl methacrylate and a B block prepared from homopolymers or copolymers of dimethylaminoethyl methacrylate and diethylaminoethyl methacrylate.
Claim 23
Dependent Claim
44 words
The inkset of claim 19, wherein said anionic ink contains an anionic polymer having at least one pendant ionic moity of the formula: -CO₂Z or -SO₃Z, wherein Z is selected from conjugate acids of organic bases, alkali metal ions, ammonium ion, and tetraalkylammonium ions.
Claim 24
Dependent Claim
14 words
The inkset of claim 23, wherein the anionic polymer comprises an AB block polymer.
Claim 25
Dependent Claim
38 words
The inkset of claim 24, wherein said anionic AB block polymer comprises an A block prepared from homopolymers or copolymers of methyl methacrylate and butyl methacrylate and a B block prepared from homopolymers or copolymers of methacrylic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.