US4687789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water soluble dispersant for water-based pigment compounds comprising a terpolymer of acrylic acid methacrylic acid and itaconic acid
Assignee: Coatex SAS
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Filing: 1986-03-04
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Granted: 1987-08-18
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Expires: 2006-03-04
Abstract
Abstract A water soluble ethylenic copolymer-based dispersant for water-based pigment compounds, comprising a liquid phase, a binder which is an emulsion polymer, especially without protective colloids and which contains a considerable density of anionic groups, of pigments wholly or partially reactive with regard to their medium by the creation of bonds between the particles of emulsion polymer and the metallic ion of the partially soluble reactive pigment, characterized by the fact that in order to confer on such water-based pigment compounds definable rheological characteristics, which can be adjusted in advance and remain stable over periods of time, the said water soluble dispersant is an acrylic, methacrylic and itaconic acid copolymer.
Inventors
- 👤 Olivier Gonnet
- 👤 Jacky Rousset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:16
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F222/00; C08F222/04; C09; C09D; C09D7/00; C09D7/40; C09D7/45
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
106 words
A process for the preparation of an aqueous pigment composition comprising: forming an aqueous dispersion containing a liquid emulsion of a polymer free of protective colloids and having a high density of anionic groups, of pigments containing metal ions, with a water-soluble dispersant which is a copolymer of acrylic acid, methacrylic acid and itaconic acid, the said dispersant having reactive carboxylate groups which can bond with the metal ions of said pigment while inhibiting their reaction with the emulsion polymer and said dispersant conferring on said aqueous pigment composition definable rheological characteristics which can be established beforehand and which remain stable over a period of time.
Claim 2
Dependent Claim
106 words
A process for the preparation of an aqueous pigment composition comprising: forming an aqueous dispersion containing a liquid emulsion of a polymer free of protective colloids and having a high density of anionic groups, of pigments containing metal ions, with a water-soluble dispersant which is a copolymer of acrylic acid, methacrylic acid and itaconic acid, the said dispersant having reactive carboxylate groups which can bond with the metal ions of said pigment while inhibiting their reaction with the emulsion polymer and said dispersant conferring on said aqueous pigment composition definable rheological characteristics which can be established beforehand and which remain stable over a period of time.
Claim 3
Dependent Claim
29 words
The process of claim 1, wherein said copolymer comprises from 2.5-96% by weight of acrylic acid, 2-95% by weight of methacrylic acid and 2-40% by weight of itaconic acid.
Claim 4
Dependent Claim
29 words
The process of claim 2, wherein said copolymer comprises from 5-70% by weight of acrylic acid, 5-70% by weight of methacrylic acid and 5-35% by weight of itaconic acid.
Claim 5
Dependent Claim
16 words
The process of claim 1, wherein the copolymers which constitute the said dispersant are partially neutralized.
Claim 6
Dependent Claim
16 words
The process of claim 1, wherein the copolymers which constitute the said dispersant are wholly neutralized.
Claim 7
Dependent Claim
25 words
The process of claim 1, wherein said copolymer is neutralized by at least one neutralizing agent which is a monovalent compound or a polyvalent compound.
Claim 8
Dependent Claim
22 words
The process of claim 6, wherein said copolymer is neutralized by at least one monovalent compound and at least one polyvalent compound.
Claim 9
Dependent Claim
14 words
The process of claim 6, wherein said monovalent neutralizing compound is an alkali compound.
Claim 10
Dependent Claim
36 words
The process of claim 8, wherein the alkali component of the neutralizing compound is selected from the group consisting of sodium, potassium, ammonium and an ion of a primary, secondary or tertiary aliphatic and/or cyclic amine.
Claim 11
Dependent Claim
20 words
The process of claim 9, wherein said amine ion is an ion of ethanolamine, monoethylamine, diethylamine, cyclohexylamine, methyl-cyclohexylamine or aminomethylpropanol.
Claim 12
Dependent Claim
30 words
The process of claim 6, wherein said polyvalent neutralizing compound is an alkaline earth metal compound, a trivalent metal compound or a polyvalent ion of an aliphatic and/or cyclic polyamine.
Claim 13
Dependent Claim
31 words
The process of claim 11, wherein said alkaline earth metal is calcium, magnesium, manganese or zinc, said trivalent metal is aluminum, and said polyamine is ethylenediamine, diethylene triamine or phenylene diamine.
Claim 14
Dependent Claim
17 words
The process of claim 1, wherein said copolymer of said dispersant has a specific viscosity of 0.3-1.6.
Claim 15
Dependent Claim
12 words
The process of claim 13, wherein said specific viscosity ranges from 0.4-1.0.
Claim 16
Dependent Claim
99 words
An aqueous pigment composition comprising: an aqueous dispersion containing a liquid emulsion of a polymer free of protective colloids and having a high density of anionic groups, of pigments containing metal ions, with a water-soluble dispersant which is a copolymer of acrylic acid, methacrylic acid and itaconic acid, the said dispersant having reactive carboxylate groups which can bond with the metal ions of said pigment while inhibiting their reaction with the emulsion polymer and said dispersant conferring on said aqueous pigment composition definable rheological characteristics which can be established beforehand and which remain stable over a period of time.
Claim 17
Dependent Claim
99 words
An aqueous pigment composition comprising: an aqueous dispersion containing a liquid emulsion of a polymer free of protective colloids and having a high density of anionic groups, of pigments containing metal ions, with a water-soluble dispersant which is a copolymer of acrylic acid, methacrylic acid and itaconic acid, the said dispersant having reactive carboxylate groups which can bond with the metal ions of said pigment while inhibiting their reaction with the emulsion polymer and said dispersant conferring on said aqueous pigment composition definable rheological characteristics which can be established beforehand and which remain stable over a period of time.
Claim 18
Dependent Claim
30 words
The composition of claim 15, wherein the copolymer dispersant is present in an amount ranging from 0.05-10% by weight based on the amount of filler and pigment in the composition.
Claim 19
Dependent Claim
17 words
The composition of claim 16, wherein the amount of said copolymer dispersant ranges from 0.5-5% by weight.
Claim 20
Dependent Claim
61 words
The composition of claim 15, wherein the aqueous phase of said dispersion further comprises an organic solvent which can be mixed with water and which is a compound selected from the group consisting of a mono- or polyalcohol, a mono- or polyglycol, an ether or ester of said mono- or polyalcohol and an ether or ester of said mono- or polyglycol.
Claim 21
Dependent Claim
36 words
The composition of claim 15, wherein said pigment is a reactive pigment selected from the group consisting of zinc oxide, zinc molybdate, zinc chromate, lead silico-chromate, barium metaborate and titanium oxides surface treated with zinc oxide.
Claim 22
Dependent Claim
29 words
The composition of claim 15, which further comprises at least one constituent selected from the group consisting of biocides, anionic or non-ionic surfactants, anti-foaming agents, thickeners and coalescing agents.
References Cited (Backward Citations)
EP0125519A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |