US4567171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, concentrated, liquid dispersions of anionic dyestuffs
Assignee: Novartis Corp
•
Filing: 1984-03-20
•
Granted: 1986-01-28
•
Expires: 2004-03-20
Abstract
Abstract A composition and a process for the production of stable, water dispersions of anionic dyestuffs, for example acid or direct dyestuffs, useful for the dyeing of organic fibers including paper. Highly concentrated, liquid dispersions of at least 15-40% by weight of dry anionic dyestuff are achieved by the use of nonionic dispersing agents and mixing or grinding in a mill until most of the undissolved dyestuff particles are smaller than 10μ.
Inventors
- 👤 Thomas M. Mangum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0072; C09B67/0073
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A stable dyestuff composition which is a water solution of an anionic dye, containing a nonionic dispersing agent, and having dispersed therein undissolved particles of the dye which are 10μ or less in diameter, wherein the composition consists essentially of about 40% to about 80% by weight of water, about 15% to about 40% by weight of the dye and about 1% to about 25% by weight of the dispersing agent.
Claim 2
Dependent Claim
71 words
A stable dyestuff composition which is a water solution of an anionic dye, containing a nonionic dispersing agent, and having dispersed therein undissolved particles of the dye which are 10μ or less in diameter, wherein the composition consists essentially of about 40% to about 80% by weight of water, about 15% to about 40% by weight of the dye and about 1% to about 25% by weight of the dispersing agent.
Claim 3
Dependent Claim
38 words
The composition of claim 1, wherein the dispersing agent is selected from the group consisting of propylene oxide-ethylene oxide block copolymers, polypropylene-polyethylene glycol polymers, aryl polyoxyethylene ethers, fatty acid/ethylene oxide condensates, polyoxyethylated fatty alcohols, and polyoxyethylated vegetable oils.
Claim 4
Dependent Claim
37 words
The composition of claim 2 wherein the dispersing agent is a block copolymer of propylene oxide and ethylene oxide of molecular weight in the range of about 1000 to about 15000 or a mixture of said copolymers.
Claim 5
Dependent Claim
20 words
The composition of claim 3, wherein the ethylene oxide portion of the block copolymer has been condensed with ethylene glycol.
Claim 6
Dependent Claim
36 words
The composition of claim 1, further containing an effective amount at least one of the additives selected from the group consisting of fungicides, antimicrobials, humectants, anti-sedimentation agents, wetting gents, chelating agents, hydrotropic agents, and anti-foaming agents.
Claim 7
Dependent Claim
51 words
The composition of claim 5, wherein the effective amounts, in weight-percents, are as follows: 0.01-1% of a fungicide 0.01-1% of an antimicrobial 5-30% of a humectant 0.1-10% of an anti-sedimentation agent 0.1-5% of a wetting agent 0.5-5% of a chelating agent 0.5-5% of a hydrotropic agent 0.01-2% of an antifoaming agent.
References Cited (Backward Citations)
US3127412A
Cited
US3726850A
Cited
US4110073A
Cited
US3948599A
Cited
US4042320A
Cited
US4328220A
Cited
US4202815A
Cited
US4468230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |