Patent US5028236A successfully refreshed from Google Patents.
US5028236A
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US
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Treatment of polyamide fibres
Assignee: Bayer AG
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Filing: 1989-08-04
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Granted: 1991-07-02
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Expires: 2009-08-04
Abstract
Abstract Ketene dimers of the general formula ##STR1## wherein R 1 and R 2 independently of one another denote an alkyl or alkenyl radical each of which has at least 8 C atoms, a cycloalkyl radical having at least 6 C atoms or an aryl or aralkyl radical are used for the treatment of wool and synthetic polyamide fibres.
Inventors
- 👤 Wilfried Kortmann
- 👤 Wolf-Dieter Schroer
- 👤 Karl-Heinz Passon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:46
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/13; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
Process for the treatment of wool and synthetic polyamide fibres, characterized in that ketene dimers of the general formula ##STR7## wherein R 1 and R 2 independently of one another denote an alkyl or alkenyl radical each of which has at least 8 C atoms, a cycloalkyl radical having at least 6 C atoms or an aryl or aralkyl radical, are used.
Claim 2
Dependent Claim
62 words
Process for the treatment of wool and synthetic polyamide fibres, characterized in that ketene dimers of the general formula ##STR7## wherein R 1 and R 2 independently of one another denote an alkyl or alkenyl radical each of which has at least 8 C atoms, a cycloalkyl radical having at least 6 C atoms or an aryl or aralkyl radical, are used.
Claim 3
Dependent Claim
34 words
Process according to claim 1, characterized in that ketene dimers of the formula (I) wherein R 1 and R 2 represent alkyl or alkenyl radicals each of which has 10-22 C atoms, are used.
Claim 4
Dependent Claim
19 words
Process according to claim 1, characterized in that the ketene dimers are used in the form of aqueous emulsions.
Claim 5
Dependent Claim
29 words
Process according to claim 1, characterized in that aqueous emulsions containing 0.5-30% by weight of a ketene dimer (I) and 0.2-15% by weight of an emulsification auxiliary are used.
Claim 6
Dependent Claim
24 words
Process according to claim 1, characterized in that the ketene dimers are employed in a proportion of 0.05-1% by weight, relative to the fibre.
Claim 7
Dependent Claim
13 words
Process according to claim 1, characterized in that it is carried out continuously.
Claim 8
Dependent Claim
22 words
Process according to claim 1, characterized in that the wool and synthetic polyamide fibres are present in the form of carpet materials.
Claim 9
Dependent Claim
15 words
Wool and synthetic polyamide materials which have been treated by the process of claim 1.
References Cited (Backward Citations)
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US2672397A
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US3002024A
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US4350788A
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JPS57205583A
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JPS5887395A
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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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |