US4705840A
Expired / Lapsed
US
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Catalysts for the curing of a water-curable isocyanate-functional prepolymer
Assignee: 3M Co
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Filing: 1985-10-04
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Granted: 1987-11-10
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Expires: 2005-10-04
Abstract
Abstract New catalysts useful in the curing of a water-curable isocyanate-functional prepolymer are provided. The new catalyst is a new 2,2'-dimorpholinyldialkyl ether. The use of the improved catalyst provides prepolymer/catalyst premix compositions having equivalent or increased shelf stability and which, when water-cured, yield resins having superior early strengths. A method of curing an isocyanate-functional prepolymer and articles useful as orthopedic bandages are also provided.
Inventors
- 👤 Richard S. Buckanin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2081; A; A61; A61L; A61L15/00; A61L15/07; A61L15/12; C08G18/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
A composition useful as a catalyst in the curing of a water-curable isocyanate-functional prepolymer comprising a substantially pure amino ether compound having the structural formula: ##STR7## wherein: each of R 1 -R 8 are individually hydrogen or lower alkyl; and R 9 is a methyl group or a phenyl group wherein the phenyl group may have one or more lower alkyl substituents.
Claim 2
Dependent Claim
62 words
A composition useful as a catalyst in the curing of a water-curable isocyanate-functional prepolymer comprising a substantially pure amino ether compound having the structural formula: ##STR7## wherein: each of R 1 -R 8 are individually hydrogen or lower alkyl; and R 9 is a methyl group or a phenyl group wherein the phenyl group may have one or more lower alkyl substituents.
Claim 3
Dependent Claim
14 words
A composition in accordance with claim 1 wherein R 9 is methyl or phenyl.
Claim 4
Dependent Claim
17 words
A composition in accordance with claim 1 wherein R 1 -R 8 are individually hydrogen or methyl.
Claim 5
Dependent Claim
19 words
A composition in accordance with claim 1 wherein R 1 -R 8 are hydrogen and R 9 is methyl.
Claim 6
Dependent Claim
19 words
A composition in accordance with claim 1 wherein R 1 -R 8 are hydrogen and R 9 is phenyl.
Claim 7
Dependent Claim
52 words
A composition comprising an isocyanate-functional prepolymer and an amino ether compound having the structural formula: ##STR8## wherein: each of R 1 -R 8 are individually hydrogen or lower alkyl; and R 9 is a methyl group or a phenyl group wherein the phenyl group may have one or more lower alkyl substituents.
Claim 8
Dependent Claim
52 words
A composition comprising an isocyanate-functional prepolymer and an amino ether compound having the structural formula: ##STR8## wherein: each of R 1 -R 8 are individually hydrogen or lower alkyl; and R 9 is a methyl group or a phenyl group wherein the phenyl group may have one or more lower alkyl substituents.
Claim 9
Dependent Claim
22 words
A composition in accordance with claim 6 wherein the isocyanate-functional prepolymer is a derivative of an aromatic polyisocyanate and a polyether polyol.
Claim 10
Dependent Claim
28 words
A composition in accordance with claim 6 wherein the amount of the amino ether compound is from about 0.1% to about 5% by weight of the isocyanate-functional prepolymer.
Claim 11
Dependent Claim
21 words
A composition in accordance with claim 6 useful as an adhesive, coating or sealant further comprising a solvent, filler and plasticizer.
Claim 12
Dependent Claim
13 words
An article comprised of flexible sheet coated with the composition of claim 6.
Claim 13
Dependent Claim
19 words
A composition in accordance with claim 6 herein R 1 -R 8 are hydrogen and R 9 is methyl.
Claim 14
Dependent Claim
19 words
A composition in accordance with claim 6 wherein R 1 -R 8 are hydrogen and R 9 is phenyl.
Claim 15
Independent Claim
68 words
A method of curing an isocyanate-functional prepolymer comprising forming a mixture of water, a water-curable isocyanate-functional prepolymer and a catalytically effective amount of an amino ether compound having the structural formula: ##STR9## wherein: each of R 1 -R 8 are individually hydrogen or lower alkyl; and R 9 is a methyl group or a phenyl group wherein the phenyl group may have one or more lower alkyl substitutents.
Claim 16
Independent Claim
68 words
A method of curing an isocyanate-functional prepolymer comprising forming a mixture of water, a water-curable isocyanate-functional prepolymer and a catalytically effective amount of an amino ether compound having the structural formula: ##STR9## wherein: each of R 1 -R 8 are individually hydrogen or lower alkyl; and R 9 is a methyl group or a phenyl group wherein the phenyl group may have one or more lower alkyl substitutents.
Claim 17
Dependent Claim
19 words
A method in accordance with claim 13 wherein the mixture is a coating on a flexible sheet during curing.
Claim 18
Dependent Claim
30 words
A method in accordance with claim 14 wherein the sheet material is a porous flexible fabric and the amount of the prepolymer is sufficient to impregnate the porous flexible fabric.
Claim 19
Dependent Claim
19 words
A method in accordance with claim 13 wherein R 1 -R 8 are hydrogen and R 9 is methyl.
Claim 20
Dependent Claim
19 words
A method in accordance with claim 13 wherein R 1 -R 8 are hydrogen and R 9 is phenyl.
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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) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |