Patent EP0426883A1 successfully refreshed from Google Patents.
EP0426883A1
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Modulus modification of water borne polyurethane-ureas
Assignee: Dow Chemical Co
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Filing: 1989-11-04
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Granted: —
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Expires: 2009-11-04
Abstract
Abstract Disclosed are novel stable aqueous dispersions of ionic polyurethane-polyureas prepared from (A) aqueous dispersions of isocyanate. terminated ionic prepolymers and (B) hydrocarbon polyamine extenders. The essential feature of the present invention resides in employing a mixture of a diol and triol in the prepolymer forming step. Also disclosed are the films and coated substrates obtained through the use of said dispersions as coatings. The films are useful in the manufacture of waterproof clothing, tarpaulins, chip-resistant coatings in automative applications and the like.
Inventors
- 👤 Sven H. Ruetman
- 👤 Joginder N. Amand
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 21:22
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/6692; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/10; C08G18/12; C08G18/40; C08G18/48; C08G18/4804; C08G18/4812
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A stable aqueous dispersion of an ionic polyurethane-polyurea prepared by the reaction of (A) an aqueous dispersion of an isocyanate terminated ionic prepolymer with (B) a hydrocarbon polyamine extender said prepolymer having been prepared from (i) an excess of an aliphatic or cycloaliphatic diisocyanate, (ii) an organic polyol, and (iii) a difunctional isocyanate-reactive component containing an ionic group or potential ionic group, characterized in that said component (ii) comprises a mixture of an organic diol and an organic triol having a molecular weight of from 250 to 6,000.
Claim 2
Dependent Claim
88 words
A stable aqueous dispersion of an ionic polyurethane-polyurea prepared by the reaction of (A) an aqueous dispersion of an isocyanate terminated ionic prepolymer with (B) a hydrocarbon polyamine extender said prepolymer having been prepared from (i) an excess of an aliphatic or cycloaliphatic diisocyanate, (ii) an organic polyol, and (iii) a difunctional isocyanate-reactive component containing an ionic group or potential ionic group, characterized in that said component (ii) comprises a mixture of an organic diol and an organic triol having a molecular weight of from 250 to 6,000.
Claim 3
Dependent Claim
14 words
A dispersion according to Claim 1, wherein said polyamine extender comprises a hydrocarbon diamine.
Claim 4
Dependent Claim
13 words
A dispersion according to Claim 1, wherein said diisocyanate (i) comprises 4,4′-methylenebis-(cyclohexyl isocyanate).
Claim 5
Dependent Claim
24 words
A dispersion according to Claim 1, wherein said diol in (ii) comprises a polyalkyleneoxy diol having a molecular weight of from 500 to 6,000.
Claim 6
Dependent Claim
24 words
A dispersion according to Claim 1, wherein said triol in (ii) comprises a polyalkyleneoxy triol having a molecular weight of from 500 to 3,000.
Claim 7
Dependent Claim
15 words
A dispersion according to Claim 5, wherein said triol comprises a polyethyleneoxy capped polypropyleneoxy triol.
Claim 8
Dependent Claim
22 words
A dispersion according to Claim 1, wherein said triol is present in up to 50 hydroxyl equivalent percent of said mixture (ii).
Claim 9
Dependent Claim
31 words
A dispersion according to Claim 1, wherein said (iii) is a carboxylic acid containing diol which can be neutralized to form said ionic group before, during or after said prepolymer formation.
Claim 10
Dependent Claim
31 words
A dispersion according to Claim 1, wherein said (iii) is present in sufficient proportions to provide from 10 to 150 milliequivalents of ionic groups per 100 grams of said prepolymer (A).
Claim 11
Dependent Claim
41 words
A dispersion according to Claim 1, wherein the proportions of said (i), (ii), and (iii) are such that the ratio of isocyanate equivalents to the total isocyanate-reactive equivalents in said prepolymer (A) falls in a range of from 1.1 to 3.
References Cited (Backward Citations)
US3983291A
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US4080318A
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FR2438069A1
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EP0073392A1
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EP0089497B1
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EP0242731A2
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