US4690842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced casting material
Assignee: Johnson and Johnson Professional Inc
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Filing: 1987-01-20
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Granted: 1987-09-01
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Expires: 2007-01-20
Abstract
Abstract A composition with reduced tack used to reinforce polyurethane casts is disclosed. The composition has controlled foaming activity and a viscosity between 100,000 and 1,000,000. The foaming activity and viscosity and reduced tack allow the formulation to be readily applied to the cast area that is to be reinforced.
Inventors
- 👤 Gene W. Kammerer
- 👤 Hee K. Yoon
- 👤 Robert Li-Jiun Sun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:15
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07; A61L15/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31554
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
168 words
A method of reinforcing a polyurethane cast comprising applying to the cast while the cast is wet with water a liquid composition comprising an aromatic polyisocyanate and a polyol in an equivalent ratio of from 2.1 to 15.1, a catalyst in an amount of from 0.1 to 10% based on the weight of the composition, an antifoam agent in an amount of from 0.7 to 7.5% based on the weight of the formulation a thickening agent in an amount of from 2 to 6% by weight of the formulation from 0.5% to 2% by weight mineral oil and a 0.5% to 3% by weight water soluble polymer selected from the group consisting of polyvinylpyrrolidone having a molecular weight of from 100,000 to 1,000,000 and a polymer having repeating units of the structure (O--CH 2 CH 2 ) n where n is an integer such that the molecular weight of the water soluble polymer is from 50,000 to 4,000,000, said composition having a viscosity of between 100,000 and 1,000,000.
Claim 2
Independent Claim
168 words
A method of reinforcing a polyurethane cast comprising applying to the cast while the cast is wet with water a liquid composition comprising an aromatic polyisocyanate and a polyol in an equivalent ratio of from 2.1 to 15.1, a catalyst in an amount of from 0.1 to 10% based on the weight of the composition, an antifoam agent in an amount of from 0.7 to 7.5% based on the weight of the formulation a thickening agent in an amount of from 2 to 6% by weight of the formulation from 0.5% to 2% by weight mineral oil and a 0.5% to 3% by weight water soluble polymer selected from the group consisting of polyvinylpyrrolidone having a molecular weight of from 100,000 to 1,000,000 and a polymer having repeating units of the structure (O--CH 2 CH 2 ) n where n is an integer such that the molecular weight of the water soluble polymer is from 50,000 to 4,000,000, said composition having a viscosity of between 100,000 and 1,000,000.
Claim 3
Dependent Claim
29 words
The method of claim 1 in which the composition is applied at a rate of from 1/2 to 1 gram per square inch of cast surface to be reinforced.
Claim 4
Dependent Claim
17 words
The method of claim 1 in which the composition has a viscosity is between 300,000 and 800,000.
Claim 5
Dependent Claim
12 words
The method of claim 1 in which the antifoam agent is polydimethylsiloxane.
Claim 6
Dependent Claim
13 words
The method of claim 1 in which the thickening agent is fumed silica.
Claim 7
Dependent Claim
14 words
The process of claim 1 in which the water soluble polymer is poly(ethylene oxide).
Claim 8
Dependent Claim
17 words
The process of claim 6 in the water soluble polymer has molecular weight between 100,000 and 3,000,000.
Claim 9
Dependent Claim
191 words
A moisture impervious container having a volume of from 2 to 16 ounces and a sealable opening at one end filled with a liquid composition comprising an aromatic polyisocyanate and a polyol in an equivalent ratio of from 2.1 to 15.1, a catalyst in an amount of from 0.1 to 10% based on the weight of the composition, an antifoam agent in an amount of from 0.7 to 7.5% based on the weight of the composition, a thickening agent in an amount of from 2 to 5% by weight of the composition, from 0.5% to 2% by weight mineral oil and a 0.5% to 3% by weight of a water soluble polymer selected from the group consisting of polyvinylpyrrolidone having a molecular weight of from 100,000 to 1,000,000 and a polymer having repeating units of the structure (O--CH 2 CH 2 ) n where n is an integer such that the molecular weight of the water soluble polymer is from 50,000 to 4,000,000, said composition having a viscosity of between 100,000 and 1,000,000, and said composition capable of foaming in a ratio of from 4 to 1 to 16 to 1.
Claim 10
Dependent Claim
191 words
A moisture impervious container having a volume of from 2 to 16 ounces and a sealable opening at one end filled with a liquid composition comprising an aromatic polyisocyanate and a polyol in an equivalent ratio of from 2.1 to 15.1, a catalyst in an amount of from 0.1 to 10% based on the weight of the composition, an antifoam agent in an amount of from 0.7 to 7.5% based on the weight of the composition, a thickening agent in an amount of from 2 to 5% by weight of the composition, from 0.5% to 2% by weight mineral oil and a 0.5% to 3% by weight of a water soluble polymer selected from the group consisting of polyvinylpyrrolidone having a molecular weight of from 100,000 to 1,000,000 and a polymer having repeating units of the structure (O--CH 2 CH 2 ) n where n is an integer such that the molecular weight of the water soluble polymer is from 50,000 to 4,000,000, said composition having a viscosity of between 100,000 and 1,000,000, and said composition capable of foaming in a ratio of from 4 to 1 to 16 to 1.
Claim 11
Dependent Claim
17 words
The container of claim 6 in which the viscosity of the composition is between 300,000 and 500,000.
Claim 12
Dependent Claim
13 words
The container of of claim 6 in which the antifoam agent is polydimethylsiloxane.
Claim 13
Dependent Claim
13 words
The container of claim 6 in which the thickening agent is fumed silica.
Claim 14
Dependent Claim
14 words
The process of claim 1 in which the water soluble polymer is poly(ethylene oxide).
Claim 15
Dependent Claim
17 words
The process of claim 6 in the water soluble polymer has molecular weight between 100,000 and 3,000,000.
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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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |