CA1151960A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Water-activated casting material
Assignee: 3M Co
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Filing: 1980-04-22
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Granted: 1983-08-16
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Expires: 2000-04-22
Abstract
Abstract ABSTRACT OF THE DISCLOSURE An orthopedic casting material is disclosed having improved strength and porosity characteristics. The casting material comprises a fabric which is made from a high modulus fiber and has a thickness between 0.020 and 0,045 inches and a mesh size of 20 to 200 openings per square inch. The fabric is impregnated with a reactive resin which hardens by wetting with a curing agent.
Inventors
- 👤 Shiraz A. Kathiriya
- 👤 Donald C. Garwood
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-08 14:40
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/10; D04B21/12; A; A43; A43D; A43D3/00; A43D3/02; A43D3/021; A61; A61L; A61L15/00; A61L15/07; A61L15/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/18; C08G18/1825; D10; D10B; D10B2509/00; D10B2509/02; D10B2509/024
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
68 words
An orthopedic casting material comprising a fabric made from a fiber having an initial modulus of elasticity greater than 8 x 106 pounds per square inch, said fabric having a thickness between 0.020 and 0.045 inch and a mesh size of 20 to 200 openings per square inch and a reactive fluid resin impregnated in said fabric which hardens when said resin is wetted with a curing agent.
Claim 2
Dependent Claim
68 words
An orthopedic casting material comprising a fabric made from a fiber having an initial modulus of elasticity greater than 8 x 106 pounds per square inch, said fabric having a thickness between 0.020 and 0.045 inch and a mesh size of 20 to 200 openings per square inch and a reactive fluid resin impregnated in said fabric which hardens when said resin is wetted with a curing agent.
Claim 3
Dependent Claim
16 words
The orthopedic casting material according to claim 1 wherein said resin hardens when wetted with water.
Claim 4
Dependent Claim
56 words
The orthopedic casting material according to claim 2 wherein said casting material when exposed to water for at least 30 seconds and wrapped upon itself to form a 2-inch diameter cylindrical laminate of eight or less layers has a load-bearing strength of 20 pounds per inch of cylinder length within 30 minutes following exposure to water.
Claim 5
Dependent Claim
15 words
The orthopedic casting material according to claim 2 wherein said resin is a polyisocyanate prepolymer.
Claim 6
Dependent Claim
20 words
The orthopedic casting material according to claim 4 wherein said polyisocyanate prepolymer comprises polypropylene oxide polyol encapped with diphenylmethane diisocyanate.
Claim 7
Dependent Claim
21 words
The orthopedic casting material according to claim 2 wherein said resin further comprises a preservative to retard hardening prior to use.
Claim 8
Dependent Claim
14 words
The orthopedic casting material according to claim 6 wherein said preservative is benzoyl chloride.
Claim 9
Dependent Claim
16 words
The orthopedic casting material according to claim 4 wherein said resin further comprises an anti-foaming agent.
Claim 10
Dependent Claim
15 words
The orthopedic casting material according to claim 8 wherein said anti-foaming agent is a silicone.
Claim 11
Dependent Claim
19 words
The orthopedic casting material according to claim 4 wherein said resin further comprises a catalyst to control hardening time.
Claim 12
Dependent Claim
13 words
The orthopedic casting material according to claim 10 wherein said catalyst is dimethylethanolamine.
Claim 13
Dependent Claim
20 words
The orthopedic casting material according to claim 11 wherein said catalyst is a mixture of dimethylethanolamine and amino bis-(dimethylaminoethyl) ether.
Claim 14
Dependent Claim
13 words
An orthopedic casting material according to claim 1 wherein said fiber is fiberglass.
Claim 15
Dependent Claim
14 words
An orthopedic casting material according to claim 13 wherein said fiberglass is E fiberglass.
Claim 16
Dependent Claim
15 words
An orthopedic casting material according to claim 14 wherein said fiberglass is ECC-150 or ECC-75.
Claim 17
Dependent Claim
18 words
An orthopedic casting material according to claim 1 wherein said fabric thickness is between 0.022 and .035 inch.
Claim 18
Dependent Claim
22 words
An orthopedic casting material according to claim 1 wherein fabric has a mesh size of 80 to 150 openings per square inch.
Claim 19
Independent Claim
111 words
A method of forming an orthopedic cast on a body member comprising the steps of: 1. covering said body member with an inner protective sleeve comprising an air permeable fabric; and 2. wrapping said body member with an orthopedic casting material comprising a fabric made from a fiber having an initial modulus of elasticity greater than 8 x 106 pounds per square inch, said fabric having a thickness between 0.020 and 0.045 inches and a mesh size of 20 to 200 openings per square inch and a reactive resin impregnated in said fabric which has been wetted with a curing agent to harden said fluid resin after said wrapping is completed.
Claim 20
Independent Claim
111 words
A method of forming an orthopedic cast on a body member comprising the steps of: 1. covering said body member with an inner protective sleeve comprising an air permeable fabric; and 2. wrapping said body member with an orthopedic casting material comprising a fabric made from a fiber having an initial modulus of elasticity greater than 8 x 106 pounds per square inch, said fabric having a thickness between 0.020 and 0.045 inches and a mesh size of 20 to 200 openings per square inch and a reactive resin impregnated in said fabric which has been wetted with a curing agent to harden said fluid resin after said wrapping is completed.
Claim 21
Dependent Claim
19 words
The method according to claim 18 wherein said resin is a polyisocyanate prepolymer which has been wetted with water.
Claim 22
Dependent Claim
11 words
The method according to claim 18 wherein said fabric is fiberglass.
References Cited (Backward Citations)
No citation records indexed.
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