US3635745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting dyestuffs of the aryl-pararosaniline sulfonic acid series into valuable pigments having a high tinctorial strength
Assignee: Hoechst AG
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Filing: 1969-07-25
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Granted: 1972-01-18
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Expires: 1989-07-25
Abstract
Abstract Process for converting dyestuffs of the aryl-pararosaniline sulfonic acid series into coloristically valuable pigments by dissolving the dyestuffs in water with the addition of alkalis, mixing the aqueous-alkaline solution of the dyestuff with an aqueous-alkaline solution of such natural resinic acids or acid modified products thereof which can be precipitated from their alkaline solution by the addition of acids, and precipitating the dyestuff product from its solution by addition of an acid. The products obtained according to the present invention are easily dispersible pigment powders having a high tinctorial strength and a soft grain.
Inventors
- 👤 Heinz Rentel
- 👤 Ernst Spietschka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:14
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/02; C09B69/06; C09B11/00; C09B11/04; C09B11/10; C09B11/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
The process as claimed In claim 1, wherein oxidized, hydrogenated, dimerized or disproportionated natural resinic acids are used.
Claim 2
Dependent Claim
16 words
The process as claimed in claim 1, wherein acid esters of natural resinic acids are used.
Claim 3
Dependent Claim
15 words
The process as claimed in claim 1, wherein aldehyde-modified acidic natural resinic acids are used.
Claim 4
Dependent Claim
24 words
The process as claimed in claim 1, wherein acidic maleinate resins or resins obtained by reaction of dienes with natural resinic acids are used.
Claim 5
Dependent Claim
13 words
The process as claimed in claim 1, wherein acidic resinic acid-phenol-adducts are used.
Claim 6
Dependent Claim
21 words
The process as claimed in claim 1, wherein addition products of natural resinic acids with hydrocarbons containing double linkages are used.
Claim 7
Dependent Claim
19 words
The process as claimed in claim 1, wherein acidic condensation products of natural resinic acids with phenolaldehyde-(formaldehyde)-condensates are used.
Claim 8
Dependent Claim
19 words
The process as claimed in claim 1, wherein acidic reaction products of natural resinic acids with xylene-formaldehyde-resins are used.
Claim 9
Dependent Claim
19 words
The process as claimed in claim 1, wherein acidic reaction products of natural resinic acids with terpene-maleinate-resins are used.
Claim 10
Dependent Claim
15 words
The process as claimed in claim 1, wherein mixtures of the acid resins are used.
References Cited (Backward Citations)
GB655458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |