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US4374643A
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US
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Color salts of basic dyes with acidic optical brighteners of stilbene type
Assignee: Hakkol Chemical Co Ltd
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Filing: 1981-07-20
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Granted: 1983-02-22
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Expires: 2001-07-20
Abstract
Abstract This invention relates to a novel color salt or color complex consisting of an optical brightener component having at least one anionic group and a color component having at least one basic group capable of forming a salt with the anionic group. This color salt is capable of coloring various fibrous articles, paper, pulp, leathers, rubbers, adhesives and plastics in clear and brightened color.
Inventors
- 👤 Kazuaki Suzuki
- 👤 Shohei Kuwabara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:24
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/02; D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; D06L4/621; D06L4/664
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
36 words
A color salt consisting of a stilbene type optical brightener component having at least one anionic group and a color component having at least one basic group capable of forming a salt with the anionic group.
Claim 2
Dependent Claim
36 words
A color salt consisting of a stilbene type optical brightener component having at least one anionic group and a color component having at least one basic group capable of forming a salt with the anionic group.
Claim 3
Dependent Claim
24 words
The color salt of claim 1, wherein the stilbene type optical brightener component has a chemical structure selected from 4,4'-bis-triazinylaminostilbene, 1,2,3-triazolylstilbene, 1,4-bis-styrylbenzene and 4,4'-bis-styrylbiphenylene.
Claim 4
Dependent Claim
28 words
The color salt of claim 1, wherein the anionic group is selected from sulfonic acid group, carboxylic acid group, their alkali metal salt groups and ammonium salt groups.
Claim 5
Dependent Claim
29 words
The color salt of claim 1, wherein the color component has a chemical structure selected from azo, anthraquinone, diphenylmethane, triphenylmethane, xanthene, acridine, azine, oxazine, thiazine, methine and phthalocyanine types.
Claim 6
Dependent Claim
28 words
The color salt of claim 1, wherein the cationic group is selected from cationized alkylamino group, acridine group, oxazine group, azine group, thiazine group and cationized nitrogen atom.
Claim 7
Dependent Claim
68 words
A process for the production of a color salt, which comprises mixing a solution of an optical brightener having at least one anionic group in water or water and a water-soluble organic solvent and a solution of a coloring agent having at least one basic group capable of forming a salt with the anionic group of the optical brightener in water or water and a water-soluble organic solvent.
Claim 8
Dependent Claim
68 words
A process for the production of a color salt, which comprises mixing a solution of an optical brightener having at least one anionic group in water or water and a water-soluble organic solvent and a solution of a coloring agent having at least one basic group capable of forming a salt with the anionic group of the optical brightener in water or water and a water-soluble organic solvent.
References Cited (Backward Citations)
US3467642A
Cited
US3600373A
Cited
US3690916A
Cited
US3759900A
Cited
US3871898A
Cited
US4306875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |