US4388435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous pigment pastes and their use
Assignee: BASF SE
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Filing: 1981-11-10
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Granted: 1983-06-14
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Expires: 2001-11-10
Abstract
Abstract Pigment pastes, comprising water, an organic solvent, a copolymer of one or more water-immiscible, or only partially water-miscible, copolymerizable α,β-olefinically unsaturated compounds and one or more water-soluble copolymerizable N-vinyl compounds, and a finely divided pigment and/or filler dispersed in the mixture of water, solvent and copolymer, are used for pigmenting aqueous solutions or dispersions of surface-coating binders, as toner pastes for water-based finishes, and for pigmenting and toning anodic or cathodic electrocoating finishes.
Inventors
- 👤 Werner Loch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:30
CPC Classifications
C; C09; C09D; C09D17/00; C09D139/00; C09D139/04; C09D139/06; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A pigment paste comprising (A) from 15 to 60% by weight of water; (B) from 15 to 50% by weight of one or more organic solvents; (C) from 0.1 to 20% by weight of a copolymer of (a) from 10 to 75% by weight of one or more water-immiscible, or only partially water-miscible, copolymerizable α,β-olefinically unsaturated compounds and (b) from 25 to 90% by weight of one or more water-soluble copolymerizable N-vinyl compounds; and (D) from 10 to 79% by weight of one or more finely divided pigments or fillers, or mixtures of pigments and fillers, dispersed in the mixture of (A), (B), (C), the sum of the percentages of (A), (B), (C) and (D) being 100.
Claim 2
Dependent Claim
117 words
A pigment paste comprising (A) from 15 to 60% by weight of water; (B) from 15 to 50% by weight of one or more organic solvents; (C) from 0.1 to 20% by weight of a copolymer of (a) from 10 to 75% by weight of one or more water-immiscible, or only partially water-miscible, copolymerizable α,β-olefinically unsaturated compounds and (b) from 25 to 90% by weight of one or more water-soluble copolymerizable N-vinyl compounds; and (D) from 10 to 79% by weight of one or more finely divided pigments or fillers, or mixtures of pigments and fillers, dispersed in the mixture of (A), (B), (C), the sum of the percentages of (A), (B), (C) and (D) being 100.
Claim 3
Dependent Claim
28 words
The pigment paste as claimed in claim 1, wherein the organic solvent (B) is a C 2 -C 4 -monoalkyl ether of ethylene glycol, and/or the monoacetate thereof.
Claim 4
Dependent Claim
47 words
The pigment paste as claimed in claim 1, wherein component (a) present as copolymerized units in the copolymer (C) is a vinyl ester of a C 2 -C 18 -monocarboxylic acid and/or an acrylic acid ester or methacrylic acid ester of a C 4 -C 18 -monoalcohol.
Claim 5
Dependent Claim
21 words
The pigment paste as claimed in claim 1, wherein component (b) present as copolymerized units in the copolymer (C) is N-vinylpyrrolidone.
Claim 6
Dependent Claim
33 words
A process for pigmenting an aqueous solution or dispersion of a surface-coating binder or binder mixture, wherein a pigment paste as defined in claim 1 is mixed with said binder or binder mixture.
Claim 7
Dependent Claim
26 words
A process for toning a pigmented water-based gloss finish, wherein a pigment paste as defined in claim 1 is added to said pigmented water-based gloss finish.
Claim 8
Dependent Claim
36 words
A process for the preparation of a pigmented anodic or cathodic electrocoating finish, wherein a paste as defined in claim 1 is added to the aqueous solution or dispersion of an electrocoating binder or binder mixture.
References Cited (Backward Citations)
DE1275029B
Cited
US3356627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |