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Patent US3945794A successfully refreshed from Google Patents.
US3945794A
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Production of level dyeings on acrylonitrile polymer fibers with basic dyes
Assignee: BASF SE
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Filing: 1974-02-19
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Granted: 1976-03-23
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Expires: 1994-02-19
Abstract
Abstract Acrylonitrile polymer fibers are dyed level shades with basic dyes using as leveling agent a quaternary ammonium salt containing two or three benzyl groups as nitrogen ligands.
Inventors
- 👤 Rudolf Rokohl
- 👤 Rolf Fikentscher
- 👤 Herbert Helfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:09
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/655; D06P1/66; D06P3/00; D06P3/70; D06P3/76; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
In a process for the production of level dyeings on acrylonitrile polymer fibers with a basic dye using a quaternary ammonium salt as a levelling agent, the improvement which comprises utilizing as said levelling agent from 0.5 to 10% by weight, with reference to said fibers, of the quaternary ammonium salt of the formula ##SPC4## in which R 1 is alkyl of one to four carbon atoms or benzyl; R 2 is alkyl of one to four carbon atoms; or R 1 and R 2 taken together form a heterocyclic ring of four to six carbon atoms with N +; and X is the radical of an organic or inorganic acid.
Claim 2
Dependent Claim
111 words
In a process for the production of level dyeings on acrylonitrile polymer fibers with a basic dye using a quaternary ammonium salt as a levelling agent, the improvement which comprises utilizing as said levelling agent from 0.5 to 10% by weight, with reference to said fibers, of the quaternary ammonium salt of the formula ##SPC4## in which R 1 is alkyl of one to four carbon atoms or benzyl; R 2 is alkyl of one to four carbon atoms; or R 1 and R 2 taken together form a heterocyclic ring of four to six carbon atoms with N +; and X is the radical of an organic or inorganic acid.
Claim 3
Dependent Claim
31 words
A process as claimed in claim 1 wherein levelling is carried out with the quaternary ammonium salt in a blank dye liquor on the dyed material after it has been dyed.
Claim 4
Dependent Claim
49 words
A process as claim in claim 1 where X - in the formula is an anion from the group: Cl - , Br - , CH 3 OSO 3 - , HOSO 3 - , HCOO - , CH 3 --COC - , HOCO--(CHOH) 2 --COO - or ##SPC5##
Claim 5
Dependent Claim
26 words
A process as claimed in claim 1 wherein the levelling agent is used in the dye liquor in an amount from 0.5 to 5% by weight.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 1 wherein the levelling agent is used in the dye liquor in an amount from 1 to 4% by weight.
References Cited (Backward Citations)
US3726641A
Cited
US3716329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |