US5616644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuff-containing aqueous dispersions
Assignee: BASF SE
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Filing: 1995-06-28
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Granted: 1997-04-01
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Expires: 2015-06-28
Abstract
Abstract Dyestuff-containing aqueous dispersions obtainable by a) preparation of at least two copolymers A) and B) in an organic solvent by solution polymerization, A) containing from 5 to 50 % by weight, based on A), of an ethylenically unsaturated acid and B) being essentially free of ethylenically unsaturated acids and the solution polymerization of the copolymers A) or B) being carried out in the presence of the other respective copolymer A) or B) already prepared, b) addition of a dyestuff before, during or after the solution polymerization, c) dispersion of the resulting solution in water and d) removal of the organic solvent if desired, are described.
Inventors
- 👤 Bernhard Schlarb
- 👤 Kurt Wendel
- 👤 Helmut Bellaire
- 👤 Karin H. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C09; C09D; C09D11/00; C09D11/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A dyestuff-containing aqueous dispersion obtainable by a) preparation of at least two copolymers A) and B) in an organic solvent by solution polymerization, said copolymers A) and B) each consisting essentially of monomers derived from ethylenically unsaturated monomers, and which may optionally be crosslinked, copolymer A) containing from 5 to 50% by weight, based on copolymer A), of an ethylenically unsaturated acid and copolymer B) being essentially free of ethylenically unsaturated acids and the solution polymerization of the copolymers A) or B) being carried out in the presence of the other respective copolymer A) or B) already prepared, b) addition of a substantially water-insoluble dyestuff before, during or after the solution polymerization, c) dispersion of the resulting solution in water and d) removal of the organic solvent if desired.
Claim 2
Dependent Claim
129 words
A dyestuff-containing aqueous dispersion obtainable by a) preparation of at least two copolymers A) and B) in an organic solvent by solution polymerization, said copolymers A) and B) each consisting essentially of monomers derived from ethylenically unsaturated monomers, and which may optionally be crosslinked, copolymer A) containing from 5 to 50% by weight, based on copolymer A), of an ethylenically unsaturated acid and copolymer B) being essentially free of ethylenically unsaturated acids and the solution polymerization of the copolymers A) or B) being carried out in the presence of the other respective copolymer A) or B) already prepared, b) addition of a substantially water-insoluble dyestuff before, during or after the solution polymerization, c) dispersion of the resulting solution in water and d) removal of the organic solvent if desired.
Claim 3
Dependent Claim
41 words
An aqueous dispersion as claimed in claim 1, the proportions by weight of the copolymer A) being from 95 to 20% by weight and those of the copolymer B) being from 5 to 80% by weight, based on the sum A)+B).
Claim 4
Dependent Claim
31 words
An aqueous dispersion as claimed in claim 1, the content of the acids in copolymer A) being selected such that copolymer A) has an acid number of from 5 to 300.
Claim 5
Dependent Claim
18 words
A process for preparing aqueous dispersions as claimed in claim 1, comprising the process steps a) to d).
Claim 6
Dependent Claim
14 words
A substrate coated with an aqueous dispersion as claimed in claim 1 and dried.
Claim 7
Dependent Claim
12 words
A recording fluid containing an aqueous dispersion as claimed in claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |