EP0544441A1
Expired / Lapsed
EP
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Production of pigment compositions
Assignee: Novartis AG
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Filing: 1992-11-18
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Granted: —
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Expires: 2012-11-18
Abstract
Abstract A process for the production of a pigment composition, comprising combining a) a dispersion of one or more non-polar components of a suiface coating vehicle, or a non-polar additive for the pigment composition in an aqueous solution of a salt of a polar pigment additive, with b) an aqueous slurry of a pigment or a precursor thereof, before, during or after the synthesis of the pigment; and then isolating the pigment composition so obtained.
Inventors
- 👤 James Mcgeachie
- 👤 Anne Marie Keirs
- 👤 John Aldred Nimmo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:34
CPC Classifications
C; C09; C09C; C09C3/00; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0008; C09B67/0009; C09B67/001; C09B67/006; C09B67/0063
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
74 words
A process for the production of a pigment composition, comprising combining a) a dispersion of one or more non-polar components of a surface coating vehicle or a non-polar additive for the pigment composition in an aqueous solution of a salt of a polar pigment additive, with b) an aqueous slurry of a pigment or a precursor thereof, before, during or after the synthesis of the pigment; and then isolating the pigment composition so obtained.
Claim 2
Dependent Claim
45 words
A process according to claim 1 in which the pH of the mixture obtained by mixing dispersion a) with slurry b), is adjusted to a value at which both the polar additive and the non-polar component(s) are precipitated on to the surface of the pigment.
Claim 3
Dependent Claim
33 words
A process according to claim 1 in which no pH adjustment is effected and, after isolation of the pigment composition, the pigment composition is washed with water, thereby removing the polar pigment additive.
Claim 4
Dependent Claim
40 words
A process according to any of the preceding claims in which the aqueous dispersion of the non-polar component(s) in the polar additive salt solution, is produced by adding the non-polar component(s) to an aqueous solution of a polar pigment additive.
Claim 5
Dependent Claim
41 words
A process according to any of the preceding claims in which the polar pigment additive is a natural or synthetic resin which is insoluble in water in the non-salt form, and soluble in water in its salt form; or an amine.
Claim 6
Dependent Claim
25 words
A process according to claim 5 in which the resin is an optionally modified rosin, and the amine is dehydroabietyl amine, tetraethylene pentamine or N-tallow-1,3-diaminopropane.
Claim 7
Dependent Claim
19 words
A process according to claim 5 in which the additive is rosin, hydrogenated rosin, disproportionated rosin or dimerised rosin.
Claim 8
Dependent Claim
56 words
A process according to any of the preceding claims in which the non-polar component is one or more of a rosin-modified phenolic resin, a rosin-modified maleic resin, a hydrocarbon resin, an alkyd resin, a phenolic resin, a fatty alcohol, a drying semi-drying or non-drying oil, a polyolefin, a wax, a litho varnish or a gloss varnish.
Claim 9
Dependent Claim
30 words
A process according to any of the preceding claims in which the relative proportion of the polar pigment additive to the non-polar component(s) ranges from 1:20 to 20:1 by weight.
Claim 10
Dependent Claim
34 words
A process according to any of the preceding claims in which the relative proportion of pigment to polar additive plus non-polar component(s) in the final pigment composition ranges from 1:3 to 20:1 by weight.
Claim 11
Dependent Claim
33 words
A process according to any of the preceding claims in which a co-additive which is capable of aiding the processing and/or applicational uses of the final pigment composition, is incorporated during the process.
Claim 12
Dependent Claim
33 words
A process according to any of the preceding claims in which the aqueous pigment slurry comprises an organic pigment useful in the manufacture of surface coatings or a precursor of such a pigment.
Claim 13
Dependent Claim
41 words
A process according to claim 12 in which the pigment is an azo or azomethine pigment, or a salt of these; a dioxazine pigment; a quinacridone pigment; an anthraquinone pigment; an isoindoline pigment; a phthalocyanine pigment; or a mixture of these.
Claim 14
Dependent Claim
14 words
A process according to claim 13 in which the pigment is an azo pigment.
Claim 15
Dependent Claim
18 words
A surface coating containing a pigment composition produced by a process claimed in any of the preceding claims.
Claim 16
Dependent Claim
12 words
A surface coating according to claim 15 which is a printing ink.
Claim 17
Dependent Claim
17 words
A surface coating according to claim 16 in which the printing ink is an offset gravure ink.
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