US4214872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersing agents for finely dividing and stabilizing dyestuffs, pigments and optical brighteners as well as the dispersions thereby obtained
Assignee: Hoechst AG
•
Filing: 1977-03-15
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Granted: 1980-07-29
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Expires: 1997-03-15
Abstract
Abstract Watersoluble condensation products of mono- or di-alkyl naphthalene sulfonic acids and formaldehyde are dispersants for dyestuffs, pigments and optical brighteners, which do not soil textiles and give highly fluid dispersions. The dispersions are stable to heat and storing.
Inventors
- 👤 Heinz Uhrig
- 👤 Karl-Hermann List
- 👤 Reinhold Deubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:31
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0086; C09K; C09K23/00; C09K23/12; D; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A process for dispersing dyestuffs, pigments and optical brighteners which comprises agitating said dyestuff, pigment or brightener in water with a condensation product of mono- or dimethyl naphthalene sulfonic acid and formaldehyde, said condensation products having been obtained by reacting 0.8 to 1.3 mols of formaldehyde with one mol of naphthalene containing 1 to 2 methyls and 0.5 to 2 sulfo groups per naphthalene nucleus.
Claim 2
Dependent Claim
65 words
A process for dispersing dyestuffs, pigments and optical brighteners which comprises agitating said dyestuff, pigment or brightener in water with a condensation product of mono- or dimethyl naphthalene sulfonic acid and formaldehyde, said condensation products having been obtained by reacting 0.8 to 1.3 mols of formaldehyde with one mol of naphthalene containing 1 to 2 methyls and 0.5 to 2 sulfo groups per naphthalene nucleus.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1, wherein per naphthalene nucleus 0.7 to 1 sulfo group is present.
Claim 4
Dependent Claim
24 words
A process as claimed in claim 1, wherein the condensation product contains 0.2 to 1 mol of naphthol per mol of mono- or dimethylnaphthalene.
Claim 5
Dependent Claim
20 words
A composition of matter comprising a dyestuff, pigment or optical brightener and a condensation product as defined in claim 1.
Claim 6
Dependent Claim
26 words
A composition as claimed in claim 4, containing 0.01 to 10 parts by weight of condensation product per part by weight of dyestuff, pigment or brightener.
Claim 7
Dependent Claim
24 words
A composition as claimed in claim 4, wherein the ratio of said dyestuff, pigment or brightener to said condensation product is 0.025 to 2:1.
Claim 8
Dependent Claim
42 words
A composition as claimed in claim 4, consisting essentially of 1 part by weight of a disperse dyestuff, 0.5 to 2 parts by weight of condensation product and such an amount of water that a suspension capable of being pumped is obtained.
Claim 9
Dependent Claim
21 words
A dyeing or brightening process which comprises adding to an aqueous bath a composition of matter as claimed in claim 4.
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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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |