Patent US4023981A successfully refreshed from Google Patents.
US4023981A
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Process for the preparation of pigmentary metallic particles coated with an organic polymer and compositions resulting therefrom
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-06-04
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Granted: 1977-05-17
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Expires: 1995-06-04
Abstract
Abstract A pigmentary composition prepared by coating metallic particles of pigment by means of a polymer or copolymer, by covering the polymerization or copolymerization "in situ" of at least one ethylenically unsaturated monomer having at least one oxygen or nitrogen heteroatom, and having a mono- or di-carborylic acid function, or an ester, nitrile or amide function or an N-substituted amide function, or an amine, alcohol or ether function, wherein the polymerization or copolymerization reaction is effected in a medium comprising at least one organic solvent in which the monomer is soluble and in the presence of at least one polymerization catalyst soluble in this medium, the monomer and the proportion thereof being selected so that the polymer or copolymer formed is insoluble in the organic solvent used.
Inventors
- 👤 Jean Perronin
- 👤 Bernard Jean Robert Gurtner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:23
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/006; C08; C08F; C08F292/00; C09C; C09C1/00; C09C1/62; C09C3/00; C09C3/10; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80; C01P2004/82; C01P2004/84; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
132 words
A process for the preparation of pigmentary compositions which comprises coating metallic particles of pigment by means of a polymer or copolymer, by covering by the polymerization or copolymerization "in situ" of at least one ethylenically unsaturated monomer having at least one oxygen or nitrogen heteroatom, and having a mono- or di-carboxylic acid function, or an ester, nitrile or amide function, or an N-substituted amide function, or an amine, alcohol or ether function, wherein the polymerization or copolymerization reaction is effected in a medium comprising at least one organic solvent in which the monomer is soluble and in the presence of at least one polymerization catalyst soluble in this medium, the monomer and the proportion thereof being selected so that the polymer or copolymer formed is insoluble in the organic solvent used.
Claim 2
Dependent Claim
132 words
A process for the preparation of pigmentary compositions which comprises coating metallic particles of pigment by means of a polymer or copolymer, by covering by the polymerization or copolymerization "in situ" of at least one ethylenically unsaturated monomer having at least one oxygen or nitrogen heteroatom, and having a mono- or di-carboxylic acid function, or an ester, nitrile or amide function, or an N-substituted amide function, or an amine, alcohol or ether function, wherein the polymerization or copolymerization reaction is effected in a medium comprising at least one organic solvent in which the monomer is soluble and in the presence of at least one polymerization catalyst soluble in this medium, the monomer and the proportion thereof being selected so that the polymer or copolymer formed is insoluble in the organic solvent used.
Claim 3
Dependent Claim
50 words
A process according to claim 1 in which the monomer is selected from the group consisting of mono- and di-carboxylic alkene acids having up to 10 carbon atoms, the esters, nitriles, amides and N-substituted derivatives of amides thereof, and anhydrides of dicarboxylic alkene acids having up to 10 carbon atoms.
Claim 4
Dependent Claim
50 words
A process according to claim 1 in which the monomer is selected from the group consisting of mono- and di-carboxylic alkene acids having up to 5 carbon atoms, the esters, nitrile, amides and N-substituted derivatives of amides thereof, and anhydrides of dicarboxylic alkene acids having up to 5 carbon atoms.
Claim 5
Dependent Claim
49 words
A process according to claim 1 in which the metallic particles are comprised of metals selected from the group consisting of aluminium, copper, tin, lead, zinc, iron, nickel, chromium, cobalt, antimony, silver, beryllium, bismuth, boron, cadmium, magnesium, manganese, molybdenum, niobium, silicon, tantalum, titanium, tungsten, vanadium, zirconium, and their alloys.
Claim 6
Dependent Claim
23 words
A process according to claim 1 in which the metallic particles are coated with a layer of at least one oxygenated metallic compound.
Claim 7
Dependent Claim
22 words
A process according to claim 1 in which the metallic particles are coated with a layer of at least one metallic oxide.
Claim 8
Dependent Claim
24 words
A process according to claim 1 in which the ratio by weight of metallic particles of pigment to resin is from 50/50 to 99.5/0.5.
Claim 9
Dependent Claim
24 words
A process according to claim 1 in which the ratio by weight of metallic particles of pigment to resin is from 70/30 to 96/4.
Claim 10
Dependent Claim
29 words
A process according to claim 1 in which the organic solvent is selected from the group consisting of aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, alcohols, ketones esters and ethers.
Claim 11
Dependent Claim
16 words
A process according to claim 1 which is effected in the absence of a surface-active compound.
Claim 12
Dependent Claim
18 words
a process according to claim 1 in which a peroxide or monoazo catalyst, free of metal, is used.
Claim 13
Dependent Claim
14 words
A process according to claim 1 in which a mixture of catalysts is used.
Claim 14
Dependent Claim
20 words
A process according to claim 1 in which a mixture of catalysts comprising catalysts having different half-life times is used.
Claim 15
Dependent Claim
10 words
Pigmentary composition obtained according to the process of claim 1.
Claim 16
Dependent Claim
15 words
A pigmentary composition in powder form made in accordance with the process of claim 1.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |