US4287177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wound covering material
Assignee: Kuraray Co Ltd
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Filing: 1979-08-15
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Granted: 1981-09-01
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Expires: 1999-08-15
Abstract
Abstract The present invention provides a covering material consisting essentially of a hydrophilic, water insoluble polymer (component A), a high boiling plasticizer and/or organic solvent (component B) for said component A, and an aqueous liquid (component C). Said covering material is useful as a protective covering material for forming a film or coat on the skin and/or wound surface in the treatment of burn. The material is characterized in that film or coat formation on the skin and/or wound surface can be realized in a short time.
Inventors
- 👤 Toshihide Nakashima
- 👤 Osamu Nakaji
- 👤 Koichi Takakura
- 👤 Takayoshi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
A; A61; A61L; A61L26/00; A61L26/0061; A61L26/008; A61L26/0009; A61L26/0014; A61L26/0071; A61L26/0076; Y; Y10; Y10S; Y10S424/00; Y10S424/13
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
150 words
A protective covering material for forming a film or coat on skin and/or wound surfaces consisting essentially of a hydrophillic, water-insoluble and substantially uncrosslinked polymer in powder form (component A), polyethylene glycol (component B) and an aqueous liquid (component C), wherein said polymer of component A is derived from a monomer represented by the formula: ##STR3## wherein R 1 is H or methyl, R 2 is alkylene containing 2-5 carbon atoms, R 3 is H, alkyl containing 1-3 carbon atoms or C 2 - or C 3 -alkyl substituted by amino or alkoxy of 1-3 carbon atoms and n is 1-30, at least 67% by weight of said polymer being composed of said monomer, wherein said component A amounts to 20-80% by weight of components A+B+C, said components B+C together amount to 80-20% by weight of components A+B+C, and said components C amounts to 20-70% by weight of components B+C.
Claim 2
Dependent Claim
150 words
A protective covering material for forming a film or coat on skin and/or wound surfaces consisting essentially of a hydrophillic, water-insoluble and substantially uncrosslinked polymer in powder form (component A), polyethylene glycol (component B) and an aqueous liquid (component C), wherein said polymer of component A is derived from a monomer represented by the formula: ##STR3## wherein R 1 is H or methyl, R 2 is alkylene containing 2-5 carbon atoms, R 3 is H, alkyl containing 1-3 carbon atoms or C 2 - or C 3 -alkyl substituted by amino or alkoxy of 1-3 carbon atoms and n is 1-30, at least 67% by weight of said polymer being composed of said monomer, wherein said component A amounts to 20-80% by weight of components A+B+C, said components B+C together amount to 80-20% by weight of components A+B+C, and said components C amounts to 20-70% by weight of components B+C.
Claim 3
Dependent Claim
25 words
A protective covering material as claimed in claim 1, wherein said polymer of component A is a polymer containing hydroxyethyl methacrylate as a constituent thereof.
Claim 4
Dependent Claim
15 words
A protective covering material as claimed in claim 2, wherein said polymer is poly(hydroxyethyl methacrylate).
Claim 5
Dependent Claim
105 words
A protective covering material as claimed in claim 1, wherein said component A is a copolymer of (a) 75-90 parts by weight of a monomer represented by the formula: ##STR4## wherein R 1 is H or methyl, R 2 is alkylene containing 2-5 carbon atoms, R 3 is H, alkyl of 1-3 carbon atoms, or C 2 - or C 3 -alkyl substituted by amino or alkoxy of 1-3 carbon atoms and n is 1-30, and (b) 25-10 parts by weight of a monomer represented by the formula: ##STR5## wherein R 4 is H or methyl and R 5 is alkyl of 1-4 carbon atoms.
Claim 6
Dependent Claim
21 words
A protective covering material as claimed in claim 4, wherein said copolymer is a copolymer of hydroxyethyl methacrylate and methyl methacrylate.
Claim 7
Dependent Claim
24 words
A protective covering material as claimed in claim 1, wherein said component B is polyethylene glycol having a molecular weight of 800 or less.
Claim 8
Dependent Claim
16 words
A protective covering material as claimed in claim 1, wherein said component C is distilled water.
Claim 9
Dependent Claim
16 words
A protective covering material as claimed in claim 1, wherein said component C is physiological saline.
Claim 10
Dependent Claim
21 words
A protective covering material as claimed in claim 1, wherein said component C amounts to 30-60% by weight of components B+C.
Claim 11
Independent Claim
173 words
A method of forming a film or coat on skin and/or wound surfaces, which comprises applying polyethylene glycol (component B) together with an aqueous liquid (component C), either separately or in admixture and then applying thereto a hydrophilic, water-insoluble and substantially uncrosslinked polymer in powder form (component A) so that a film or coat may be formed on said skin and/or wound surfaces, wherein said polymer of component A is derived from a monomer represented by the formula: ##STR6## wherein R 1 is H or methyl, R 2 is alkylene containing 2-5 carbon atoms, R 3 is H, alkyl containing 1-3 carbon atoms or C 2 - or C 3 -alkyl substituted by amino or alkoxy of 1-3 carbon atoms and n is 1-30, at least 67% by weight of said polymer being composed of said monomer, wherein said component A amounts to 20-80% by weight of components A+B+C, said components B+C together amount to 80-20% by weight of components A+B+C, and said component C amounts to 20-70% by weight of components B+C.
Claim 12
Independent Claim
173 words
A method of forming a film or coat on skin and/or wound surfaces, which comprises applying polyethylene glycol (component B) together with an aqueous liquid (component C), either separately or in admixture and then applying thereto a hydrophilic, water-insoluble and substantially uncrosslinked polymer in powder form (component A) so that a film or coat may be formed on said skin and/or wound surfaces, wherein said polymer of component A is derived from a monomer represented by the formula: ##STR6## wherein R 1 is H or methyl, R 2 is alkylene containing 2-5 carbon atoms, R 3 is H, alkyl containing 1-3 carbon atoms or C 2 - or C 3 -alkyl substituted by amino or alkoxy of 1-3 carbon atoms and n is 1-30, at least 67% by weight of said polymer being composed of said monomer, wherein said component A amounts to 20-80% by weight of components A+B+C, said components B+C together amount to 80-20% by weight of components A+B+C, and said component C amounts to 20-70% by weight of components B+C.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 10, wherein said polymer of component A is a polymer containing hydroxymethyl methacrylate as a constituent thereof.
Claim 14
Dependent Claim
13 words
A method as claimed in claim 11, wherein said polymer is poly(hydroxyethyl methacrylate).
Claim 15
Dependent Claim
103 words
A method as claimed in claim 10, wherein said component A is a copolymer of (a) 75-90 parts by weight of a monomer represented by the formula: ##STR7## wherein R 1 is H or methyl, R 2 is alkylene containing 2-5 carbon atoms, R 3 is H, alkyl of 1-3 carbon atoms, or C 2 - or C 3 -alkyl substituted by amino or alkoxy of 1-3 carbon atoms and n is 1-30, and (b) 25-10 parts by weight of a monomer represented by the formula: ##STR8## wherein R 4 is H or methyl and R 5 is alkyl of 1-4 carbon atoms.
Claim 16
Dependent Claim
19 words
A method as claimed in claim 13, wherein said copolymer is a copolymer of hydroxyethyl methacrylate and methyl methacrylate.
Claim 17
Dependent Claim
22 words
A method as claimed in claim 10, wherein said component B is polyethylene glycol having a molecular weight of 800 or less.
Claim 18
Dependent Claim
14 words
A method as claimed in claim 10, wherein said component C is distilled water.
Claim 19
Dependent Claim
14 words
A method as claimed in claim 10, wherein said component C is physiological saline.
Claim 20
Dependent Claim
19 words
A method as claimed in claim 10, wherein said component C amounts to 30-60% by weight of components B+C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |