Patent US5052380A successfully refreshed from Google Patents.
US5052380A
Expired / Lapsed
US
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Colored orthopedic resins and orthopedic casting materials incorporating same
Assignee: 3M Co
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Filing: 1989-07-07
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Granted: 1991-10-01
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Expires: 2009-07-07
Abstract
Abstract The present invention relates to colored orthipedic resins and colored orthopedic casting materials which are storage stable. In making the colored orthopedic resins and colored orthopedic casting materials, a chromophore-containing polyol is covalently bonded into a prepolymer resin.
Inventors
- 👤 Charles C. Polta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:21
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07; A61L15/10; A61F; A61F13/00; A61F13/04; A61L15/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
102 words
A colored orthopedic casting material, comprising: a flexible sheet; and a water curable resin coated onto said flexible sheet, said resin comprising an isocyanate functional, polyurethane prepolymer, said prepolymer being a liquid formed by the reaction of a polyol with an excess of a polyisocyanate, at least a portion of said polyol comprising a chromophore-containing polyol which becomes covalently bound into said prepolymer, said chromophore-containing polyol imparting a desired color to said resin-coated sheet; wherein said colored resin-coated sheet is stored in a moisture-free pouch until its desired usage, and wherein said colored resin-coated sheet is storage stable prior to such usage.
Claim 2
Dependent Claim
102 words
A colored orthopedic casting material, comprising: a flexible sheet; and a water curable resin coated onto said flexible sheet, said resin comprising an isocyanate functional, polyurethane prepolymer, said prepolymer being a liquid formed by the reaction of a polyol with an excess of a polyisocyanate, at least a portion of said polyol comprising a chromophore-containing polyol which becomes covalently bound into said prepolymer, said chromophore-containing polyol imparting a desired color to said resin-coated sheet; wherein said colored resin-coated sheet is stored in a moisture-free pouch until its desired usage, and wherein said colored resin-coated sheet is storage stable prior to such usage.
Claim 3
Dependent Claim
22 words
A colored orthopedic casting material as defined in claim 1 wherein said chromophore-containing polyol comprises a dyestuff bound to a polyether polyol.
Claim 4
Dependent Claim
23 words
A colored orthopedic casting material as defined in claim 1 wherein said chromophore-containing polyol is a Reactint® polyol available from Milliken Research Corporation.
Claim 5
Dependent Claim
39 words
A colored orthopedic casting material as defined in claim 1 wherein said chromophore-containing polyol is a Reactint® Black X40LV, Reactint® Blue X3LV, Reactint® Orange X38, Reactint® Red X52, Reactint® Violet X80, Reactint® Yellow X15, or combinations of the foregoing.
Claim 6
Dependent Claim
41 words
A colored orthopedic casting material as defined in claim 1 wherein said colored resin-coated sheet is storage stable in that the uniformity of color in said colored resin-coated sheet remains substantially unchanged after about 5 weeks of aging at 120° F.
Claim 7
Dependent Claim
48 words
A colored orthopedic casting material as defined in claim 1 wherein said colored resin-coated sheet is storage stable in that the presence of said chromophore-containing polyol does not cause a significantly higher rate of viscosity increase in said resin over time as compared to a corresponding noncolored resin.
Claim 8
Dependent Claim
25 words
A colored orthopedic casting material as defined in claim 1 wherein the leaching or migration of color from said colored resin-coated sheet is substantially avoided.
Claim 9
Dependent Claim
20 words
A colored orthopedic casting material as defined in claim 1 wherein said chromophore-containing polyol is a liquid at room temperature.
Claim 10
Dependent Claim
26 words
A colored orthopedic casting material as defined in claim 1 wherein said chromophore-containing polyol comprises from about 0.01% to about 2% by weight of said resin.
Claim 11
Dependent Claim
19 words
A colored orthopedic casting material as defined in claim 1 wherein said resin further comprises a tertiary amine catalyst.
Claim 12
Dependent Claim
25 words
A colored orthopedic casting material as defined in claim 1 wherein said prepolymer resin has a viscosity of from about 10,000 to about 300,000 centipoise.
Claim 13
Dependent Claim
25 words
A colored orthopedic casting material as defined in claim 1 wherein said prepolymer resin has a viscosity of from about 10,000 to about 100,000 centipoise.
Claim 14
Dependent Claim
25 words
A colored orthopedic casting material as defined in claim 1 wherein said prepolymer resin has a viscosity of from about 10,000 to about 80,000 centipoise.
Claim 15
Dependent Claim
36 words
A colored orthopedic casting material as defined in claim 1 wherein the ratio of NCO groups in said polyisocyanate to OH groups in said polyol is between about 1.2 to 1 and about 4.5 to 1.
Claim 16
Dependent Claim
36 words
A colored orthopedic casting material as defined in claim 1 wherein the ratio of NCO groups in said polyisocyanate to OH groups in said polyol is between about 1.8 to 1 and about 3.8 to 1.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |