US4927876A
Expired / Lapsed
US
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Aqueous dispersions
Assignee: DSM IP Assets BV
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Filing: 1988-09-14
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Granted: 1990-05-22
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Expires: 2008-09-14
Abstract
Abstract An aqueous polymer dispersion containing a water-dispersible polyurethane and a vinyl polymer, the polyurethane being the product of reacting an active hydrogen containing chain extender with a water-dispersible isocyanate-terminated polyurethane prepolymer derived from a polyisocyanate component containing at least 5% by weight of 2,4'-diphenylmethane diisocyanate. 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
2026-11-02 05:45
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; C08; C08F; C08F283/00; C08F283/006; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7607; C08G18/7657; C08G18/7664; C08G18/7671; C08G18/77; C08G18/78; C08G18/79; C08G18/797; C09J; C09J175/00; C09J175/04; C08G2170/00; C08G2170/80; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
56 words
An aqueous polymer dispersion containing a water-dispersible polyurethane and a vinyl polymer, the polyurethane being the product of reacting an active hydrogen containing chain extender with a water-dispersible isocyanate-terminated polyurethane derived from a polyisocyanate component comprising a mixture of the 2,4'- and 4,4'-isomers of diphenylmethane diisocyanate containing from 5 to 70% by weight of the 2,4'-isomer.
Claim 2
Dependent Claim
56 words
An aqueous polymer dispersion containing a water-dispersible polyurethane and a vinyl polymer, the polyurethane being the product of reacting an active hydrogen containing chain extender with a water-dispersible isocyanate-terminated polyurethane derived from a polyisocyanate component comprising a mixture of the 2,4'- and 4,4'-isomers of diphenylmethane diisocyanate containing from 5 to 70% by weight of the 2,4'-isomer.
Claim 3
Dependent Claim
92 words
A dispersion according to claim I wherein the prepolymer is the reaction product of: (i) a polyisocyanate component comprising a mixture of the 2,4'- and 4,4'-isomers of diphenylmethane diisocyanate containing from 5 to 70% by weight of the 2,4'-isomer, and (ii) an active hydrogen component comprising at least one polymeric polyol having a molecular weight in the range 400 to 6000 and optionally one or more low molecular weight polyols and polyamines having a molecular weight below 400, at least one of the polyols or polyamines containing ionic or potentially ionic groups.
Claim 4
Dependent Claim
67 words
A dispersion according to claim 2 wherein the active hydrogen component comprises: (i) a polymeric diol having a molecular weight of from 400 to 6000, (ii) from 1 to 2 moles, per mole of polymeric diol, of a carboxy group containing diol or triol, and (iii) from 0 to 1.2 mole, per mole of polymeric diol of a diol having a molecular weight from 62 to 300.
Claim 5
Dependent Claim
15 words
A dispersion according to claim 3 wherein the polymeric diol is a polytetramethylene ether glycol.
Claim 6
Dependent Claim
15 words
A dispersion according to claim 3 wherein the carboxy group containing diol is 2,2-dimethylolpropionic acid.
Claim 7
Dependent Claim
20 words
A dispersion according to claim 3 wherein the diol having a molecular weight from 62 to 300 is cyclohexane dimethanol.
Claim 8
Dependent Claim
73 words
An aqueous polymer dispersion containing a water-dispersible polyurethane and a vinyl polymer, the polyurethane being the product of reacting an active hydrogen containing chain extender with a water-dispersible isocyanate-terminated polyurethane prepolymer derived from a polyisocyanate component comprising: (i) from 10 to 60% by weight of toluene diisocyanate, and (ii) from 90 to 40% by weight of a mixture of 4,4'- and 2,4-diphenylmethane diisocyanates containing from 5 to 70% by weight of the 2,4'-isomer.
Claim 9
Dependent Claim
73 words
An aqueous polymer dispersion containing a water-dispersible polyurethane and a vinyl polymer, the polyurethane being the product of reacting an active hydrogen containing chain extender with a water-dispersible isocyanate-terminated polyurethane prepolymer derived from a polyisocyanate component comprising: (i) from 10 to 60% by weight of toluene diisocyanate, and (ii) from 90 to 40% by weight of a mixture of 4,4'- and 2,4-diphenylmethane diisocyanates containing from 5 to 70% by weight of the 2,4'-isomer.
Claim 10
Dependent Claim
41 words
A dispersion according to claim 7 wherein the polyisocyanate component comprises from 30 to 50% by weight of toluene diisocyanate and from 70 to 50% by weight of 4,4'/2,4'-diphenylmethane diisocyanate mixture containing from 10 to 40% by weight of the 2,4'-isomer.
Claim 11
Dependent Claim
21 words
A dispersion according to claim 8 wherein the 4,4'/2,4'-diphenylmethane diisocyanate mixture contains from 20 to 30% by weight of the 2,4'-isomer.
Claim 12
Dependent Claim
106 words
A dispersion according to claim 7 wherein the prepolymer is the reaction product of: (i) a polyisocyanate component comprising from 10 to 60% by weight of toluene diisocyanate and from 90 to 40% by weight of a mixture of 4,4'- and 2,4'-diphenylmethane diisocyanates containing from 5 to 70% by weight of the 2,4'-isomer, and (ii) an active hydrogen component comprising at least one polymeric polyol having a molecular weight in the range 400 to 6000 and optionally one or more low molecular weight polyols and polyamines having a molecular weight below 400, at least one of the polyols or polyamines containing ionic or potentially ionic groups.
Claim 13
Dependent Claim
67 words
A dispersion according to claim 10 wherein the active hydrogen component comprises: (i) a polymeric diol having a molecular weight of from 400 to 6000, (ii) from 1 to 2 moles, per mole of polymeric diol, of a carboxy group containing diol or triol, and (iii) from 0 to 1.2 mole, per mole of polymeric diol of a diol having a molecular weight from 62 to 300.
Claim 14
Dependent Claim
15 words
A dispersion according to claim 10 wherein the polymeric diol is a polytetramethylene ether glycol.
Claim 15
Dependent Claim
15 words
A dispersion according to claim 10 wherein the carboxy group containing diol is 2,2-dimethylolpropionic acid.
Claim 16
Dependent Claim
20 words
A dispersion according to claim 10 wherein the diol having a molecular weight from 62 to 300 is cyclohexane dimethanol.
Claim 17
Dependent Claim
32 words
A dispersion according to claim 1 or claim 7 prepared by the free radical polymerisation of one or more vinyl monomers in the presence of an aqueous dispersion of the water-dispersible polyurethane.
Claim 18
Dependent Claim
17 words
A coating of film derived from an aqueous dispersion as claimed in claim 1 or claim 7.
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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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |