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Patent US4245993A successfully refreshed from Google Patents.
US4245993A
Expired / Lapsed
US
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Highly concentrated, stable, free-flowing aqueous dispersions of diazotizable aromatic amines bearing electrophilic substituents
Assignee: Rohner AG Pratteln
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Filing: 1978-10-31
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Granted: 1981-01-20
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Expires: 1998-10-31
Abstract
Abstract The dispersions contain (a) 30 to 60% by weight of a diazotizable aromatic amine bearing electrophilic substituents and having an average particle size below 10 μm (microns), (b) 0.1 to 5% by weight of a water-soluble polymer or copolymer of an N-vinyl-lactam, (c) 0.1 to 5% by weight of an anionic dispersing agent, (d) 0 to 30% by weight of at least one hydrotropic compound and/or at least one compound which lowers the freezing point and (e) water. The dispersions can be prepared by wet-grinding of the components. They can be used to produce azopigments in substance or azodyestuffs on textile substrates. Their diazotization proceeds very quickly and completely.
Inventors
- 👤 Hans D. Kirner
- 👤 Jacques Wegmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:15
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0079; D; D06; D06P; D06P1/00; D06P1/02; D06P1/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
Highly concentrated, stable, free-flowing aqueous dispersions of diazotizable aromatic amines bearing electrophilic substituents, comprising (a) 30 to 60% by weight of a diazotizable aromatic amine bearing electrophilic substituents and having an average particle size below 10 μm (microns), (b) 0.1 to 5% by weight of a water-soluble poly-N-vinyl lactam or a water-soluble copolymer of at least two different N-vinyl lactams or a water-soluble copolymer of at least one N-vinyl lactam with at least one other compound which can be copolymerized with the N-vinyl-lactam, (c) 0.1 to 5% by weight of an anionic dispersing agent, (d) 0 to 30% by weight of at least one hydrotropic compound and/or at least one compound which lowers the freezing point and (e) water.
Claim 2
Dependent Claim
119 words
Highly concentrated, stable, free-flowing aqueous dispersions of diazotizable aromatic amines bearing electrophilic substituents, comprising (a) 30 to 60% by weight of a diazotizable aromatic amine bearing electrophilic substituents and having an average particle size below 10 μm (microns), (b) 0.1 to 5% by weight of a water-soluble poly-N-vinyl lactam or a water-soluble copolymer of at least two different N-vinyl lactams or a water-soluble copolymer of at least one N-vinyl lactam with at least one other compound which can be copolymerized with the N-vinyl-lactam, (c) 0.1 to 5% by weight of an anionic dispersing agent, (d) 0 to 30% by weight of at least one hydrotropic compound and/or at least one compound which lowers the freezing point and (e) water.
Claim 3
Dependent Claim
24 words
The dispersions according to claim 1 containing 0.1 to 1% by weight of component (b) and 0.1 to 1% by weight of component (c).
Claim 4
Dependent Claim
38 words
The dispersions according to claim 1 or 2, wherein the diazotizable aromatic amine is substituted by at least one nitro, cyano, alkylsulfonyl, aralkylsulfonyl, arylsulfonyl and/or sulfonamide group and can also be substitued by at most two nucleophilic substituents.
Claim 5
Dependent Claim
29 words
The dispersions according to claim 1 or 2, wherein the diazotizable aromatic amine is a 4-amino-1,1'-azobenzene which can be substituted by at most two low molecular weight alkyl groups.
Claim 6
Dependent Claim
20 words
The dispersions according to claim 1, wherein the diazotizable aromatic amine has an average particle size below 5 μm (microns).
Claim 7
Dependent Claim
11 words
The dispersions according to claim 1, wherein component (b) is poly-1-vinyl-2-pyrrolidone.
Claim 8
Dependent Claim
16 words
The dispersions according to claim 1, wherein component (c) is the disodium salt of dinaphthylmethane-disulfonic acid.
Claim 9
Dependent Claim
14 words
The dispersions according to claim 1, wherein component (d) is at least one glycol.
Claim 10
Dependent Claim
57 words
A method of preparing the dispersions according to claim 1, which comprises subjecting 30 to 60% by weight of component (a), based on the finished dispersion, to wet-grinding in the presence of component (b) as well as component (c) and, if desired, component (d), until the average particle size of component (a) is below 10 μm (microns).
Claim 11
Dependent Claim
26 words
The method according to claim 9, characterized in that the wet-grinding is continued until the average particle size of component (a) is below 5 μm (microns).
Claim 12
Dependent Claim
54 words
The use of the dispersions according to claim 1 for the preparation of azopigments in substance or of azodyestuffs on textile substrates, characterized in that the dispersion is diazotized in a way known per se and the diazonium salt solution thus obtained is coupled in a way known per se with a coupling component.
Claim 13
Dependent Claim
9 words
Azopigments, prepared according to the method of claim 11.
Claim 14
Dependent Claim
12 words
Dyed or printed textiles, obtained according to the method of claim 11.
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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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |