Patent US951556A successfully refreshed from Google Patents.
Patent US4655202A successfully refreshed from Google Patents.
US4655202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bandages, components thereof and use
Assignee: Smith and Nephew PLC
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Filing: 1984-08-10
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Granted: 1987-04-07
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Expires: 2004-08-10
Abstract
Abstract An orthopaedic bandage is described which comprises a support carrying a vinyl compound, which compound polymerizes when exposed to a water-activated vinyl polymerization catalyst. The vinyl compound is a hydrophilic prepolymer which contains more than one polymerizable vinyl group. This prepolymer is in association with at least one component of a water-activatable vinyl polymerization redox catalyst in solid form in a water pervious coating which is insoluble in the prepolymer. Encapsulation of one component of the catalyst system in a water pervious coating provides a storage stable bandage which is activated by immersion in water and gives a satisfactory working time for immobilizing a limb compared to use of an uncoated catalyst.
Inventors
- 👤 William D. Potter
- 👤 Sinan B. Kiamil
- 👤 Nicholas D. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:47
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
An orthopaedic bandage which comprises a support carrying a vinyl compound which compound polymerises when exposed to a water activated vinyl polymerisation catalyst in which the vinyl compound is a hydrophilic prepolymer which contains more than one polymerisable vinyl group and said prepolymer is in association with at least one component of a water-activatable vinyl polymerisation redox catalyst in a solid particulate form in a water pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 2
Dependent Claim
124 words
An orthopaedic bandage which comprises a support carrying a vinyl compound which compound polymerises when exposed to a water activated vinyl polymerisation catalyst in which the vinyl compound is a hydrophilic prepolymer which contains more than one polymerisable vinyl group and said prepolymer is in association with at least one component of a water-activatable vinyl polymerisation redox catalyst in a solid particulate form in a water pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 3
Dependent Claim
18 words
A bandage according to claim 1 in which the water-pervious coating is from 5 to 35 μm thick.
Claim 4
Dependent Claim
24 words
A bandage according to claim 1 in which the weight ratio of the redox catalyst component to the water-pervious coating is 10:1 to 1:3.
Claim 5
Dependent Claim
23 words
A bandage according to claim 1 in which one component of the redox catalyst is a solid reducing agent within a water-pervious coating.
Claim 6
Dependent Claim
18 words
A bandage according to claim 4 in which the reducing agent is sodium metabisulphite which has been encapsulated.
Claim 7
Dependent Claim
21 words
A bandage according to claim 1 in which the water-pervious coating is formed from an hydroxyalkyl acrylic ester polymer or copolymer.
Claim 8
Dependent Claim
21 words
A bandage according to claim 4 in which the second component of the redox catalyst system is a copper (II) compound.
Claim 9
Dependent Claim
26 words
A bandage according to claim 1 in which the amount of catalyst in association with the prepolymer is 0.1 to 10% by weight of the prepolymer.
Claim 10
Dependent Claim
22 words
A bandage according to claim 1 in which the prepolymer is derived from an aliphatic isocyanate having 3 isocyanate groups per molecule.
Claim 11
Dependent Claim
26 words
A bandage according to claim 1 in which the prepolymer contains not less than 3 acrylic ester or methacrylic ester groups and is a viscous liquid.
Claim 12
Dependent Claim
91 words
A water-activatable vinyl polymerisation redox catalyst for polymerising hydrophilic prepolymers containing not less than two polymerisable vinyl groups in which at least one component of said catalyst is in solid particulate form in a water-pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 13
Dependent Claim
91 words
A water-activatable vinyl polymerisation redox catalyst for polymerising hydrophilic prepolymers containing not less than two polymerisable vinyl groups in which at least one component of said catalyst is in solid particulate form in a water-pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 14
Dependent Claim
27 words
A catalyst according to claim 11 characterised in that the catalyst comprises a copper (II) salt and a reducing agent in solid form in a water-pervious coating.
Claim 15
Dependent Claim
125 words
A process for the preparation of an orthopaedic bandage which comprises coating or impregnating a support with a vinyl compound which compound polymerises when exposed to a water-activated polymerisation catalyst in which the vinyl compound is a hydrophilic prepolymer which contains more than one polymerisable vinyl group in association with at least one component of a water activatable vinyl polymerisation redox catalyst in solid particulate form in a water-pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 16
Dependent Claim
125 words
A process for the preparation of an orthopaedic bandage which comprises coating or impregnating a support with a vinyl compound which compound polymerises when exposed to a water-activated polymerisation catalyst in which the vinyl compound is a hydrophilic prepolymer which contains more than one polymerisable vinyl group in association with at least one component of a water activatable vinyl polymerisation redox catalyst in solid particulate form in a water-pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 17
Independent Claim
145 words
A method of forming a rigid orthopaedic cast for body members which comprises providing an orthopaedic bandage comprising a support carrying a compound which polymerises when exposed to a water-activated vinyl polymerisation redox catalyst, providing a water activatable vinyl polymerisation catalyst, and dipping in water, wrapping the orthopaedic bandage around the member to be immobilised wherein the vinyl compound is a hydrophilic prepolymer which contains not less than two polymerisable vinyl groups in association with at least one component of the catalyst in solid particulate form in a water-pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 18
Independent Claim
145 words
A method of forming a rigid orthopaedic cast for body members which comprises providing an orthopaedic bandage comprising a support carrying a compound which polymerises when exposed to a water-activated vinyl polymerisation redox catalyst, providing a water activatable vinyl polymerisation catalyst, and dipping in water, wrapping the orthopaedic bandage around the member to be immobilised wherein the vinyl compound is a hydrophilic prepolymer which contains not less than two polymerisable vinyl groups in association with at least one component of the catalyst in solid particulate form in a water-pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 19
Dependent Claim
121 words
A cast forming, water-curable composition comprising a vinyl compound which compound polymerises when exposed to a water-activated vinyl polymerisation catalyst wherein the vinyl compound is a polymerisable hydrophilic prepolymer which contains not less than two polymerisable vinyl groups and said prepolymer is in association with at least one component of a water-activatable vinyl polymerisation redox catalyst in a solid particulate form in a water pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 20
Dependent Claim
121 words
A cast forming, water-curable composition comprising a vinyl compound which compound polymerises when exposed to a water-activated vinyl polymerisation catalyst wherein the vinyl compound is a polymerisable hydrophilic prepolymer which contains not less than two polymerisable vinyl groups and said prepolymer is in association with at least one component of a water-activatable vinyl polymerisation redox catalyst in a solid particulate form in a water pervious coating in which the particles have an uncoated size of from 10 to 500 μm and in which the water-pervious coating is present over in excess of 95% of the particle surface and in which the weight ratio of catalyst to coating is 99:1 to 1:9 and in which the coating is insoluble in the prepolymer.
Claim 21
Dependent Claim
114 words
A process for the preparation of a redox catalyst component coated in a hydroxyethyl acrylic ester polymer or copolymer, which process comprises suspending the finely divided particulate component having a particle size of 10 to 500 μm in a solution of a hydroxyethyl acryl ester optionally together with a vinylic comonomer compatible therewith in a solvent which is not a solvent for the desired comonomer, and polymerising the ester optionally together with its vinylic comonomer about the component particles to form a water-pervious coating on the particles of the component so that in excess of 95% of the particle surface is coated and the weight ratio of catalyst to coating is 99:1 to 1:9.
Claim 22
Dependent Claim
114 words
A process for the preparation of a redox catalyst component coated in a hydroxyethyl acrylic ester polymer or copolymer, which process comprises suspending the finely divided particulate component having a particle size of 10 to 500 μm in a solution of a hydroxyethyl acryl ester optionally together with a vinylic comonomer compatible therewith in a solvent which is not a solvent for the desired comonomer, and polymerising the ester optionally together with its vinylic comonomer about the component particles to form a water-pervious coating on the particles of the component so that in excess of 95% of the particle surface is coated and the weight ratio of catalyst to coating is 99:1 to 1:9.
References Cited (Backward Citations)
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JPS5634453A
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |