US5043381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersions of a nonionic, water dispersible polyurethane having pendent polyoxyethylene chains
Assignee: Syngenta Ltd
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Filing: 1989-09-13
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Granted: 1991-08-27
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Expires: 2009-09-13
Abstract
Abstract An aqueous dispersion of a nonionic water-dispersible polyurethane having pendent polyoxyethylene chains and one crosslink per 3,000 to 100,000 atomic weight units. The dispersions are useful as coating compositions.
Inventors
- 👤 Richard G. Coogan
- 👤 Razmik Vartan-Boghossian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5036; C08G18/5042; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08G18/2805; C08G18/2815; C08G18/283; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/80; C08G18/8061; C08G18/8064
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
An aqueous dispersion of a nonionic, water dispersible polyurethane having pendent polyoxyethylene chains and one crosslink per 3,000 to 100,000 atomic weight units wherein the nonionic, water dispersible polyurethane is the reaction product of: (a) a nonionic, water dispersible, isocyanate-terminated polyurethane prepolymer formed by reacting: (i) an organic polyisocyanate; (ii) at least one organic polyol having a molecular weight in the range of 62 to 6000; and (iii) a dispersing diol and/or diisocyanate having a pendent polyoxyethylene chain; and (b) an active hydrogen containing chain extender; wherein the prepolymer forming reactants (i) and (ii) contain a polyisocyanate having three or more isocyanate groups per molecule and/or a polyol having three or more hydroxyl groups per molecule in such amounts that the total reactants include between 1.0 and 18 equivalents percent of a polyurethane forming component having a functionality greater than two.
Claim 2
Dependent Claim
141 words
An aqueous dispersion of a nonionic, water dispersible polyurethane having pendent polyoxyethylene chains and one crosslink per 3,000 to 100,000 atomic weight units wherein the nonionic, water dispersible polyurethane is the reaction product of: (a) a nonionic, water dispersible, isocyanate-terminated polyurethane prepolymer formed by reacting: (i) an organic polyisocyanate; (ii) at least one organic polyol having a molecular weight in the range of 62 to 6000; and (iii) a dispersing diol and/or diisocyanate having a pendent polyoxyethylene chain; and (b) an active hydrogen containing chain extender; wherein the prepolymer forming reactants (i) and (ii) contain a polyisocyanate having three or more isocyanate groups per molecule and/or a polyol having three or more hydroxyl groups per molecule in such amounts that the total reactants include between 1.0 and 18 equivalents percent of a polyurethane forming component having a functionality greater than two.
Claim 3
Dependent Claim
103 words
An aqueous dispersion according to claim 1 wherein the nonionic, water dispersible polyurethane is the reaction product of: (a) a nonionic, water dispersible, isocyanate-terminated polyurethane prepolymer formed by reacting: (i) an organic polyisocyanate; (ii) a polymeric polyol having a molecular weight in the range 400 to 6000; and (iii) a dispersion diol and/or diisocyanate having a pendent polyoxyethylene chain; and optionally, (iv) a low molecular weight polyol having a molecular weight less than 400; and (b) an active hydrogen containing chain extender; wherein said reactants include between 1.0 and 18 equivalents percent of a polyurethane forming component having a functionality greater than two.
Claim 4
Dependent Claim
19 words
An aqueous dispersion according to claim 1 percent of a polyurethane forming component having a functionality greater than two.
Claim 5
Dependent Claim
20 words
An aqueous dispersion according to claim 2 wherein the polymeric polyol has a molecular weight of from 700 to 3000.
Claim 6
Dependent Claim
59 words
An aqueous dispersion according to claim 1 wherein the diol having a pendent polyoxyethylene chain is a product obtained by reacting one mole of an organic diisocyanate in which the two isocyanate groups have different reactivities with approximately one mole of a polyethylene glycol mono-ether and then reacting the adduct so obtained with approximately one mole of a dialkanolamine.
Claim 7
Dependent Claim
61 words
An aqueous dispersion according to claim 1 wherein the diisocyanate having a pendent polyoxyethylene chain is a product obtained by reacting two moles of an organic diisocyanate in which the two isocyanate groups have different reactivities with approximately one mole of polyethylene glycol mono-ether and then reacting the urethane mono-isocyanate so obtained with the excess diisocyanate to form an allophanate diisocyanate.
Claim 8
Dependent Claim
14 words
A coating or film derived from an aqueous dispersion as claimed in claim 1.
Claim 9
Dependent Claim
16 words
A composite article which includes a film as claimed in claim 2 as an adhesive layer.
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |