EP0220000A2
Expired / Lapsed
EP
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Method for the production of aqueous polyurethane coating compositions
Assignee: Zeneca Inc
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Filing: 1986-10-01
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Granted: —
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Expires: 2006-10-01
Abstract
Abstract Aqueous polyurethane dispersions useful as coating compositions wherein the polyurethane comprises the reaction product of a) an isocyanate-terminated polyurethane prepolymer containing carboxylic acid salt groups formed by reacting: (i) a polyisocyanate component containing at least l% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol, b) an active hydrogen containing chain extender.
Inventors
- 👤 Richard George Coogan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 22:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/10; C08G18/12; C08G18/7607
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
63 words
An aqueous polyurethane dispersion wherein the polyurethane comprises the reaction product of a) an isocyanate-terminated polyurethane prepolymer containing carboxylic acid salt groups formed by reacting: (i) a polyisocyanate component containing at least 1% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol, and b) an active hydrogen containing chain extender.
Claim 2
Dependent Claim
63 words
An aqueous polyurethane dispersion wherein the polyurethane comprises the reaction product of a) an isocyanate-terminated polyurethane prepolymer containing carboxylic acid salt groups formed by reacting: (i) a polyisocyanate component containing at least 1% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol, and b) an active hydrogen containing chain extender.
Claim 3
Dependent Claim
18 words
A dispersion according to Claim l wherein the polyisocyanate component contains at least 5% by weight of diphenylmethane-2,4′-diisocyanate.
Claim 4
Dependent Claim
18 words
A dispersion according to Claim 2 wherein the polyisocyanate component contains at least l0% by weight of diphenylmethane-2,4′-diisocyanate.
Claim 5
Dependent Claim
32 words
A dispersion according to Claim l wherein the polyisocyanate component is 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 6
Dependent Claim
47 words
A dispersion according to Claim l wherein the polyisocyanate component comprises: (i) from l0 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 7
Dependent Claim
42 words
A dispersion according to Claim 5 wherein the polyisocyanate component comprises from 30 to 50% by weight of toluene diisocyanate and from 70 to 50% by weight of a 4:4′-/2,4′-diphenylmethane diisocyanate mixture containing from l0 to 40% by weight of the 2,4′-isomer.
Claim 8
Dependent Claim
68 words
A dispersion according to Claim l wherein the active hydrogen containing component comprises: (i) a polymeric diol having a molecular weight of from 500 to 6000, (ii) from l to 2 moles, per mole of polymeric diol, of a carboxy group containing diol or triol, and (iii) from 0 to l mole, per mole of polymeric diol, of a diol having a molecular weight from 62 to 300.
Claim 9
Dependent Claim
16 words
A dispersion according to Claim 7 wherein the polymeric diol is a polyether or polyester diol.
Claim 10
Dependent Claim
15 words
A dispersion according to Claim 8 wherein the polymeric diol is a polytetramethylene ether glycol.
Claim 11
Dependent Claim
16 words
l0. A dispersion according to Claim 7 wherein the carboxy group containing diol is 2,2-dimethylolpropionic acid.
Claim 12
Dependent Claim
20 words
A dispersion according to Claim 7 wherein the diol having a molecular weight from 62 to 300 is cyclohexane dimethanol.
Claim 13
Dependent Claim
28 words
A dispersion according to Claim l wherein the chain extender is selected from ammonia, primary and secondary aliphatic, alicyclic, aromatic, araliphatic or heterocyclic diamines, hydrazine and substituted hydrazines.
Claim 14
Dependent Claim
23 words
A dispersion according to Claim l2 wherein the chain extender is selected from hydrazine, ethylene diamine, menthane diamine, l,3-phenylene diamine and l,4-phenylene diamine.
Claim 15
Dependent Claim
39 words
An isocyanate-terminated polyurethane prepolymer comprising the reaction product of (i) a polyisocyanate component containing at least l% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol.
Claim 16
Dependent Claim
39 words
An isocyanate-terminated polyurethane prepolymer comprising the reaction product of (i) a polyisocyanate component containing at least l% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol.
Claim 17
Dependent Claim
31 words
A prepolymer according to Claim l4 wherein the polyisocyanate component is 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 18
Dependent Claim
47 words
A prepolymer according to Claim l4 wherein the polyisocyanate component comprises: (i) from l0 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 19
Dependent Claim
42 words
A prepolymer according to Claim l6 wherein the polyisocyanate component comprises: from 30 to 50% by weight of toluene diisocyanate and from 70 to 50% by weight of a 4,4′/2,4′-diphenylmethane diisocyanate mixture containing from l0 to 40% by weight of the 2,4′-isomer.
Claim 20
Dependent Claim
68 words
A prepolymer according to Claim l4 wherein the active hydrogen containing component comprises: (i) a polymeric diol having a molecular weight of from 500 to 6000, (ii) from l to 2 moles, per mole of polymeric diol, of a carboxy group containing diol or triol, and (iii) from 0 to l mole, per mole of polymeric diol, of a diol having a molecular weight from 62 to 300.
Claim 21
Dependent Claim
32 words
A prepolymer according to Claim l8 wherein the polymeric diol is a polytetramethylene ether glycol, the carboxy group containing diol is 2,2-dimethylolpropionic acid and the low molecular weight diol is cyclohexane dimethanol.
Claim 22
Dependent Claim
68 words
A coated article comprising a substrate having a coating of a polyurethane comprising the reaction product of (a) an isocyanate-terminated polyurethane prepolymer containing carboxylic acid salt groups formed by reacting: (i) a polyisocyanate component containing at least l% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol, and (b) an active hydrogen containing chain extender.
Claim 23
Dependent Claim
68 words
A coated article comprising a substrate having a coating of a polyurethane comprising the reaction product of (a) an isocyanate-terminated polyurethane prepolymer containing carboxylic acid salt groups formed by reacting: (i) a polyisocyanate component containing at least l% by weight of diphenylmethane-2,4′-diisocyanate, and (ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol, and (b) an active hydrogen containing chain extender.
References Cited (Backward Citations)
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