US4375357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble fast polymeric black colorant, its preparation and use in dyes and inks
Assignee: Dynapol Shareholders Liquidating Trust
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Filing: 1981-06-09
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Granted: 1983-03-01
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Expires: 2001-06-09
Abstract
Abstract A family of polymeric black colorants is disclosed. The subject colorants are composed of an organic polymer backbone comprised of a plurality of aromatic rings from which depend via azo groups a plurality of chromophore units having the structure ##STR1## wherein M is hydrogen or preferably a cation. These polymeric colorants are water-soluble, and noncrystalline and form dyes and inks that are fast to paper stock.
Inventors
- 👤 Robert E. Wingard, Jr.
- 👤 Steve Y. W. Ng
- 👤 Sally A. Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C09B69/106; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
55 words
A water-soluble polymeric black colorant which comprises an organic polymer backbone comprising a plurality of aromatic rings and a plurality of units of 8-(4-anilino-5-sulfo-1-naphthlylazo)-1-naphthol-3,6-disulfonic acid or a cation salt thereof covalently bonded to said backbone via azo groups that link a backbone aromatic carbon and the 2-position carbon of said acid or cation salt units.
Claim 2
Dependent Claim
55 words
A water-soluble polymeric black colorant which comprises an organic polymer backbone comprising a plurality of aromatic rings and a plurality of units of 8-(4-anilino-5-sulfo-1-naphthlylazo)-1-naphthol-3,6-disulfonic acid or a cation salt thereof covalently bonded to said backbone via azo groups that link a backbone aromatic carbon and the 2-position carbon of said acid or cation salt units.
Claim 3
Dependent Claim
13 words
A black colorant of claim 1 wherein said polymeric compound is a homopolymer.
Claim 4
Dependent Claim
13 words
A black colorant of claim 1 wherein said polymeric compound is a copolymer.
Claim 5
Dependent Claim
24 words
A black colorant of claim 1 wherein said aromatic rings are pendant from an organic chain which links them together into the polymer backbone.
Claim 6
Dependent Claim
21 words
A black colorant of claim 1 wherein said aromatic rings are present as integral structural units in the organic backbone chain.
Claim 7
Dependent Claim
30 words
A black colorant of claim 4 having recurring units of the structure ##STR49## wherein R is hydrogen or a lower alkyl group, Chrom is ##STR50## and M is a cation.
Claim 8
Dependent Claim
10 words
A black colorant of claim 6 wherein R is hydrogen.
Claim 9
Dependent Claim
12 words
The black colorant of claim 6 wherein R is a methyl group.
Claim 10
Dependent Claim
11 words
The black colorant of claim 7 wherein M is sodium cation.
Claim 11
Dependent Claim
11 words
The black colorant of claim 7 wherein M is potassium cation.
Claim 12
Dependent Claim
31 words
A black colorant of claim 4 wherein said backbone is polystyrene and said compound comprises recurring structural units of the formula ##STR51## wherein Chrom is ##STR52## and M is a cation.
Claim 13
Dependent Claim
19 words
The black colorant of claim 11 wherein M is selected from the group consisting of sodium and potassium cations.
Claim 14
Dependent Claim
39 words
A black colorant of claim 4 wherein the organic chain derived from poly(ethyleneimine) thereby comprising recurring structural units of the formula ##STR53## wherein PEI is poly(ethyleneimine) linked to the SO 2 's through amine nitrogens and Chrom is ##STR54##
Claim 15
Dependent Claim
18 words
A black colorant of claim 13 wherein M is selected from the group of sodium and potassium cations.
Claim 16
Dependent Claim
24 words
A black polymeric dye solution comprising from 1000 ppm to 20% by weight of the colorant of claim 1 in a water-based solvent system.
Claim 17
Dependent Claim
11 words
A solution of claim 15 additionally comprising an additional polymeric colorant.
Claim 18
Dependent Claim
12 words
A printed cellulosic web having deposited thereon the colorant of 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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |