Patent US5534166A successfully refreshed from Google Patents.
US5534166A
Expired / Lapsed
US
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Preparation of condensates of arenesulfonic acids and formaldehyde and use thereof
Assignee: BASF SE
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Filing: 1993-03-26
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Granted: 1996-07-09
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Expires: 2013-03-26
Abstract
Abstract Condensates of arenesulfonic acids and formaldehyde are prepared by sulfonating arenes obtainable by thermal cracking of a naphthenic residue oil and fractional distillation of the cracked products of the fraction obtained at 100-120° C. under atmospheric pressure, sulfonating this aromatics fraction with oleum at 120°-160° C. using an amount of from 0.7 to 1.2 parts by weight of oleum having an SO 3 content of 24% by weight per part by weight of aromatics fraction, and subsequently condensing the arenesulfonic acids with formaldehyde in a conventional manner, and are used as dispersants, in particular for preparing dye formulations.
Inventors
- 👤 Ralf Brueckmann
- 👤 Johannes P. Dix
- 👤 Rolf Fikentscher
- 👤 Manfred Herrmann
- 👤 Norbert Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:17
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0237; C07; C07G; C07G99/00; C07G99/002; C07C; C07C309/00; C07C309/01; C07C309/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
148 words
A dye formulation containing 100 parts by weight of a dye and from 8 to 500 parts by weight; of a dispersing agent, said dispersing agent prepared by a process consisting essentially of the steps of: (a) thermally cracking a naphthenic residue oil to obtain a cracked product and then fractional distilling said cracked product to obtain an arene compound composition distilling at 100°-120° C. and 1013 said composition comprising 30 to 55 wt. % naphthalene, at least about 9 wt. % methyl naphthalene and at least about 3 wt. % indene, (b) sulfonating said arene compound composition with oleum at from 120° to 160° C., (c) using from 0.7-1.2 parts by weight of oleum having an SO 3 content of 24% by weight per part by weight of said arene compound composition, and (d) condensing the arene sulfonic acid thus obtained with formaldehyde in an aqueous medium.
Claim 2
Dependent Claim
148 words
A dye formulation containing 100 parts by weight of a dye and from 8 to 500 parts by weight; of a dispersing agent, said dispersing agent prepared by a process consisting essentially of the steps of: (a) thermally cracking a naphthenic residue oil to obtain a cracked product and then fractional distilling said cracked product to obtain an arene compound composition distilling at 100°-120° C. and 1013 said composition comprising 30 to 55 wt. % naphthalene, at least about 9 wt. % methyl naphthalene and at least about 3 wt. % indene, (b) sulfonating said arene compound composition with oleum at from 120° to 160° C., (c) using from 0.7-1.2 parts by weight of oleum having an SO 3 content of 24% by weight per part by weight of said arene compound composition, and (d) condensing the arene sulfonic acid thus obtained with formaldehyde in an aqueous medium.
Claim 3
Dependent Claim
23 words
The dye formulation of claim 1, containing 25-400 parts by weight of said dispersing agent per 100 parts by weight of said dye.
Claim 4
Dependent Claim
17 words
The dye formulation of claim 1, wherein said dye is blue disperse dye Color Index No. 11345.
Claim 5
Dependent Claim
17 words
The dye formulation of claim 1, wherein said dye is yellow disperse dye Color Index No. 47023.
Claim 6
Dependent Claim
34 words
The dye formulation of claim 1, comprising step (c) using 0.8-0.9 parts by weight of oleum having an SO 3 content of 24% by weight per part by weight of said arene compound composition.
Claim 7
Dependent Claim
33 words
The dye formulation of claim 1, wherein said condensing step (d) is conducted using 0.07-0.17 parts by weight of formaldehyde calculated as 100% strength, per part by weight of said arene compound composition.
Claim 8
Dependent Claim
19 words
The dye formulation of claim 1, wherein said sulfonating step (b) is conducted at a temperature of 120°-135° C.
Claim 9
Dependent Claim
22 words
The dye formulation of claim 1, wherein said arenesulfonic acid comprises a ratio of α-naphthlenesulfonic acids/β-naphthlenesulfonic acids of from 20:1 to 1:3.
Claim 10
Dependent Claim
14 words
The dye formulation of claim 8, wherein said ratio is from 10:1 to 1:2.
Claim 11
Dependent Claim
18 words
The dye formulation of claim 1, wherein said thermal cracking is conducted at a temperature of 1,400°-1,700° C.
Claim 12
Dependent Claim
16 words
The dye formulation of claim 4, wherein said arene compound composition comprises 40-45 wt. % naphthalene.
Claim 13
Dependent Claim
17 words
The dye formulation of claim 11, wherein said arene compound composition further comprises 5-15 wt. % 2-methylnaphthalene.
Claim 14
Dependent Claim
17 words
The dye formulation of claim 11, wherein said arene compound composition further comprises 4-10 wt. % 1-methylnaphthalene.
Claim 15
Dependent Claim
17 words
The dye formulation of claim 11, wherein said arene compound composition further comprises 3-10 wt. % indene.
Claim 16
Independent Claim
112 words
A method of improving the dispersibility of a dye by admixing with said dye, a dispersing agent prepared by a process comprising the steps of: (a) thermally cracking a naphthenic residue oil to obtain a cracked product and then fractional distilling said cracked product to obtain an arene compound composition distilling at 100°-120° C. and 1013 mbar, (b) sulfonating said arene compound composition with oleum at from 120° to 160° C., (c) using from 0.7-1.2 parts by weight of oleum having an SO 3 content of 24% by weight per part by weight of said arene compound composition, and (d) condensing the arenesulfonic acid thus obtained with formaldehyde in an aqueous medium.
Claim 17
Independent Claim
112 words
A method of improving the dispersibility of a dye by admixing with said dye, a dispersing agent prepared by a process comprising the steps of: (a) thermally cracking a naphthenic residue oil to obtain a cracked product and then fractional distilling said cracked product to obtain an arene compound composition distilling at 100°-120° C. and 1013 mbar, (b) sulfonating said arene compound composition with oleum at from 120° to 160° C., (c) using from 0.7-1.2 parts by weight of oleum having an SO 3 content of 24% by weight per part by weight of said arene compound composition, and (d) condensing the arenesulfonic acid thus obtained with formaldehyde in an aqueous medium.
References Cited (Backward Citations)
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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) | 1999-07-09 | 2000-01-08 | 2000-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-09 | 2004-01-08 | 2004-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-09 | 2008-01-08 | 2008-07-09 | $7700.00 | Window Closed / Lapsed |