US4501852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, aqueous dispersions of polyurethane-ureas
Assignee: Bayer Corp
•
Filing: 1983-06-20
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Granted: 1985-02-26
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Expires: 2003-06-20
Abstract
Abstract The present invention relates to a stable, aqueous dispersion of polyurethane-ureas wherein said polyurethane-ureas contain (i) about 10 to 120 milliequivalents per 100 grams of polyurethane-urea of chemically incorporated anionic groups, and (ii) up to about 10% by weight, based on the weight of the polyurethane-urea, of lateral and/or terminal hydrophilic chains containing ethylene oxide units, wherein the counterions of the anionic groups are a mixture of volatile and non-volatile cations in an equivalent ratio of about 1:4 to 4:1. The present invention is also directed to the coatings and films prepared from these dispersions.
Inventors
- 👤 Peter H. Markusch
- 👤 James W. Rosthauser
- 👤 Michael C. Beatty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84; C08G18/08; C08G18/0804; C08G18/0819; C08G18/10; C08G18/12; C08G18/28; C08G18/2805; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5036; C08G18/5042; C08G18/70; C08G18/72; C08G18/721; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/80; C08G18/8061; C08G18/8064
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
76 words
A stable, aqueous dispersion of polyurethane-ureas wherein said polyurethane-ureas contain (i) about 10 to 120 milliequivalents per 100 grams of said polyurethane-ureas of chemically incorporated anionic groups, and (ii) up to about 10% by weight, based on the weight of said polyurethane-ureas, of lateral and/or terminal hydrophilic chains, containing ethylene oxide units, wherein the counterions of said anionic groups are a mixture of volatile and nonvolatile cations in an equivalent ratio of about 1:4 to 4:1.
Claim 2
Dependent Claim
76 words
A stable, aqueous dispersion of polyurethane-ureas wherein said polyurethane-ureas contain (i) about 10 to 120 milliequivalents per 100 grams of said polyurethane-ureas of chemically incorporated anionic groups, and (ii) up to about 10% by weight, based on the weight of said polyurethane-ureas, of lateral and/or terminal hydrophilic chains, containing ethylene oxide units, wherein the counterions of said anionic groups are a mixture of volatile and nonvolatile cations in an equivalent ratio of about 1:4 to 4:1.
Claim 3
Dependent Claim
24 words
The aqueous dispersion of claim 1 wherein said anionic groups are selected from the group consisting of carboxylate anions, sulfonate anions and mixtures thereof.
Claim 4
Dependent Claim
13 words
The aqueous dispersion of claim 1 wherein said volatile cations are tertiary amines.
Claim 5
Dependent Claim
14 words
The aqueous dispersion of claim 1 wherein said nonvolatile cations comprise an alkali metal.
Claim 6
Dependent Claim
12 words
The aqueous dispersion of claim 4 wherein said alkali metal is sodium.
Claim 7
Dependent Claim
52 words
The aqueous dispersion of claim 1 wherein said polyurethane-urea contain (i) about 10 to 60 milliequivalents per 100 grams of said polyurethane-ureas of chemically incorporated sulfonate and/or carboxylate groups, and (ii) 1 to 6by weight, based on the weight of said polyurethane-ureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units.
Claim 8
Dependent Claim
12 words
The aqueous dispersion of claim 3 wherein said nonvolatile cations are sodium.
Claim 9
Dependent Claim
52 words
The stable, aqueous dispersion of claim 1 wherein said polyurethane-ureas are prepared by a process which comprises initially forming an isocyanate-terminated prepolymer containing aliphatically- and/or cycloaliphatically-bound. terminal isocyanate groups and subsequently forming said polyurethane-ureas by chain extending said prepolymer with a polyfunctional amine having an average functionality between about 2 and 6.
Claim 10
Dependent Claim
17 words
The aqueous dispersion of claim 8 wherein the isocyanate component used in preparing said prepolymer is bis-(4-isocyanatocyclohexyl)-methane.
Claim 11
Dependent Claim
33 words
The aqueous dispersion of claim 2 wherein said anionic groups are a mixture of sulfonate groups and carboxylate groups and wherein said cations are a mixture of sodium ions and trialkyl ammonium ions.
Claim 12
Dependent Claim
128 words
A stable, aqueous dispersion of polyurethane-ureas wherein (a) said polyurethane-ureas contain (i) about 10 to 60 milliequivalents per 100 grams of said polyurethane-ureas of chemically incorporated sulfonate and/or carboxylate anionic groups, and (ii) about 1 to 6% by weight, based on the weight of said polyurethane-ureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units; (b) said polyurethane-ureas are prepared by a process which comprises initially forming an isocyanate-terminated prepolymer containing aliphatically- and/or cycloaliphatically-bound, terminal isocyanate groups and subsequently forming said polyurethane-ureas by chain extending said prepolymer with a polyfunctional amine having an average functionality between about 2 and 3; and (c) the counterions of said anionic groups are a mixture of volatile tertiary amines and alkali metals in an equivalent ratio of about 1:4 to 4:1.
Claim 13
Dependent Claim
128 words
A stable, aqueous dispersion of polyurethane-ureas wherein (a) said polyurethane-ureas contain (i) about 10 to 60 milliequivalents per 100 grams of said polyurethane-ureas of chemically incorporated sulfonate and/or carboxylate anionic groups, and (ii) about 1 to 6% by weight, based on the weight of said polyurethane-ureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units; (b) said polyurethane-ureas are prepared by a process which comprises initially forming an isocyanate-terminated prepolymer containing aliphatically- and/or cycloaliphatically-bound, terminal isocyanate groups and subsequently forming said polyurethane-ureas by chain extending said prepolymer with a polyfunctional amine having an average functionality between about 2 and 3; and (c) the counterions of said anionic groups are a mixture of volatile tertiary amines and alkali metals in an equivalent ratio of about 1:4 to 4:1.
Claim 14
Dependent Claim
12 words
The aqueous dispersion of claim 11 wherein said alkali metal is sodium.
Claim 15
Dependent Claim
17 words
The aqueous dispersion of claim 11 wherein the isocyanate component used in preparing said prepolymer is bis-(4-isocyanatocyclohexyl)-methane.
Claim 16
Dependent Claim
33 words
The aqueous dispersion of claim 11 wherein said anionic groups are a mixture of sulfonate groups and carboxylate groups and wherein said counterions are a mixture of sodium ions and trialkyl ammonium ions.
Claim 17
Dependent Claim
24 words
The aqueous dispersion of claim 11 wherein said isocyanate-terminated prepolymer is dispersed in an aqueous medium prior to the addition of said polyfunctional amine.
Claim 18
Dependent Claim
11 words
A coated substrate prepared from the aqueous dispersion of claim 1.
Claim 19
Dependent Claim
10 words
A film prepared from the aqueous dispersion of claim 1.
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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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |