US5019428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyurethanes containing perfluoroaliphatic groups and use thereof
Assignee: BASF Corp
•
Filing: 1989-01-25
•
Granted: 1991-05-28
•
Expires: 2009-01-25
Abstract
Abstract Modified polyurethanes containing perfluoroaliphalic groups which are obtained by reacting oligo(poly)urethanes containing free hydroxyl or isocyanate groups and perfluoroaliphatic groups with di/polyfunctional polysiloxanes at elevated temperatures with conversion of all the reactive groups of the urethane are used for the oil- and water-repellent finishing of fiber materials, conferring on these materials thus treated not only laundering- and drycleaning-stable effects but also in particular a very soft, full hand of very good surface smoothness, these excellent hand effects being further optimized by the addition of a polyethylene dispersion and/or of further customary textile assistants, in particular water-repellent fluorocarbon compounds.
Inventors
- 👤 Simpert Ludemann
- 👤 Michael Bernheim
- 👤 Bernhard Sandner
- 👤 Erich Rossler
- 👤 Hans-Burkhardt Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:25
CPC Classifications
C; C08; C08G; C08G18/00; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/576; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3863; C08G18/3865; C08G18/3868; C08G18/387; C08G18/83; C08G18/837; C08L; C08L75/00; C08L75/04; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
A method for the oil or water repellent finishing of a fiber material which comprises the step of applying, in the form of an organic solution or aqueous dispersion, a modified polyurethane which contains perfluoroaliphatic groups and is obtained by reacting an oligo(poly)urethane containing free hydroxyl or isocyanate groups and perfluoroaliphatic groups (R f ) (compound 1) with a polysiloxane having at least 2 functional groups (compound 2) at elevated temperature in the presence or absence of an inert gas atmosphere and in the presence or absence of a catalyst and within or without a carrier medium, the equivalence ratio between the free hydroxyl and isocyanate groups on the oligo(poly) urethane and the functional groups on the polysiloxane reacting therewith having been chosen in such a way that all the reactive groups on compound (1) have been converted.
Claim 2
Independent Claim
138 words
A method for the oil or water repellent finishing of a fiber material which comprises the step of applying, in the form of an organic solution or aqueous dispersion, a modified polyurethane which contains perfluoroaliphatic groups and is obtained by reacting an oligo(poly)urethane containing free hydroxyl or isocyanate groups and perfluoroaliphatic groups (R f ) (compound 1) with a polysiloxane having at least 2 functional groups (compound 2) at elevated temperature in the presence or absence of an inert gas atmosphere and in the presence or absence of a catalyst and within or without a carrier medium, the equivalence ratio between the free hydroxyl and isocyanate groups on the oligo(poly) urethane and the functional groups on the polysiloxane reacting therewith having been chosen in such a way that all the reactive groups on compound (1) have been converted.
Claim 3
Dependent Claim
27 words
A method of claim 1 wherein the functional groups on said oliglo(poly)urethane are free hydroxy groups and functional groups on said polysiloxane are epoxy or carboxyl groups.
Claim 4
Dependent Claim
12 words
A method of claim 2 wherein said polysiloxane is a α, ω-functional-polysiloxane.
Claim 5
Dependent Claim
28 words
A method of claim 1 wherein the functional groups on said oliglo(poly)urethane are free-NCO groups and the functional groups on said polysiloxane are hydroxy, amine or amide groups.
Claim 6
Dependent Claim
13 words
A method of claim 4 wherein said polysiloxane is a α, ω-functional polysiloxane.
Claim 7
Dependent Claim
16 words
A method of claim 4 wherein the hydroxy functional groups on said polysiloxane are carbinol groups.
Claim 8
Dependent Claim
56 words
A method of claim 1 wherein a 20 to 35% strength dispersion of an emulsifiable polyethylene having a density at 20° C. of at least 0.92 g/cm 3 and an acid number of at least 5 is added to said aqueous dispersion in an amount equal to up to 100% by weight of said aqueous dispersion.
Claim 9
Dependent Claim
38 words
A method of claim 7 wherein the emulsifiable polyethylene at 20° C. has a density of from 0.95 to 1.05 g/cm 3 , an acid number from 10 to 60 and a saponification number from 15 to 80.
Claim 10
Dependent Claim
18 words
A method of claim 1 wherein a further customary textile assistant is utilized concomitantly in a conventional manner.
Claim 11
Dependent Claim
31 words
A method of claim 9 wherein the textile assistant is a water-repellent fluorocarbon compound in aqueous dispersion containing at least 5% by weight of fluorine based on weight of the dispersion.
Claim 12
Dependent Claim
17 words
A method of claim 10 wherein the fluorocarbon compound is a polymer or copolymer containing perfluoroaliphatic groups.
Claim 13
Dependent Claim
11 words
A method of claim 11 wherein the fluorocarbon compound is ASAHIAG310.
Claim 14
Dependent Claim
22 words
A method of claim 11 wherein the aqueous dispersion of fluorocarbon compound is used in an amount from 5 to 40 grams/liter.
Claim 15
Dependent Claim
19 words
A method of claim 13 wherein the aqueous dispersion is used in an amount from 7 to 25 grams/liter.
Claim 16
Dependent Claim
12 words
A method of claim 1 wherein the fiber material is a textile.
Claim 17
Dependent Claim
26 words
A method of claim 7 wherein said emulsifiable polyethylene is added in an amount equal to 30 to 50% of the weight of said aqueous dispersion.
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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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |