EP0078040A2
Expired / Lapsed
EP
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Moisture vapor permeable sheet materials
Assignee: Seton Co
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Filing: 1982-10-22
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Granted: —
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Expires: 2002-10-22
Abstract
Abstract A moisture vapor permeable sheet material is comprised of a homogeneous admixture of a synthetic polymer material and a protein derivative. The sheet material is moisture vapor permeable and nonpenetrable by liquid water. The sheet material additionally can have coated thereon a pressure sensitive adhesive which is comprised of a synthetic organic polymer adhesive and a soluble derivative in solid solution. Sheet material is formed by providing a homogeneous fluid solution of a soluble protein derivative and a synthetic organic polymer in a solvent. The protein derivative has a pH level compatible with the pH level of the organic polymer. Film is formed from the homogenous fluid solution and the solvent is removed from the film to form the sheet material which is moisture vapor permeable. When the sheet material includes an adhesive, the adhesive is coated as a fluid solution in a solvent on one side of the sheet material.
Inventors
- 👤 Gheorghe Cioca
- 👤 George F. Feeley
- 👤 Joseph B. Brabson
- 👤 Peter Barth
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:39
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; C; C08; C08L; C08L75/00; C08L75/04; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2865; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
30 words
A moisture vapor permeable sheet material comprising: a homogeneous admixture of a synthetic polymeric material and a protein, said sheet material being moisture vapor permeable and nonpenetrable by liquid water.
Claim 2
Dependent Claim
30 words
A moisture vapor permeable sheet material comprising: a homogeneous admixture of a synthetic polymeric material and a protein, said sheet material being moisture vapor permeable and nonpenetrable by liquid water.
Claim 3
Dependent Claim
16 words
The sheet material of Claim 1 wherein said synthetic polymeric material is a thermoplastic polyurethane polymer.
Claim 4
Dependent Claim
25 words
The sheet material of Claim 1 wherein said soluble protein derivative is derived from a member selected from the group consisting of collagen and elastin.
Claim 5
Dependent Claim
10 words
ε The sheet material of Claim 1 which is microporous.
Claim 6
Dependent Claim
9 words
The sheet material of Claim 1 which is nonmicroporous.
Claim 7
Dependent Claim
16 words
The sheet material of Claim 1 having about 1 to 15 percent by weight protein derivative.
Claim 8
Dependent Claim
21 words
The sheet material of Claim 1 having a moisture vapor permeability of at least 300 g/m 2 /24 hours at 40°C.
Claim 9
Dependent Claim
14 words
The sheet material of Claim 1 having a thickness of up to 5 mils.
Claim 10
Dependent Claim
28 words
The sheet material of Claim 1 having a pressure sensitive adhesive coated on one side thereof, said pressure sensitive adhesive being comprised of a synthetic organic polymer adhesive.
Claim 11
Dependent Claim
14 words
The sheet material of Claim 9 wherein said adhesive contains a solid protein derivative.
Claim 12
Dependent Claim
21 words
The sheet material of Claim 9 having a moisture vapor permeability of at least 300 g/m 2 /24 hours at 40°C.
Claim 13
Independent Claim
87 words
A method of forming a moisture vapor permeable sheet material comprising: A. forming a homogeneous fluid admixture of a protein derivative and a synthetic organic polymer in a solvent wherein the protein derivative has a pH level compatible with the pH level of the organic polymer; B. forming a film from the homogeneous admixture; and C. removing the solvent from said solution to form a sheet material which is a solid solution of the protein derivative and the organic polymer, said sheet material being moisture vapor permeable.
Claim 14
Independent Claim
87 words
A method of forming a moisture vapor permeable sheet material comprising: A. forming a homogeneous fluid admixture of a protein derivative and a synthetic organic polymer in a solvent wherein the protein derivative has a pH level compatible with the pH level of the organic polymer; B. forming a film from the homogeneous admixture; and C. removing the solvent from said solution to form a sheet material which is a solid solution of the protein derivative and the organic polymer, said sheet material being moisture vapor permeable.
Claim 15
Dependent Claim
14 words
The method of Claim 12 wherein said synthetic organic polymer is a polyurethane polymer.
Claim 16
Dependent Claim
26 words
The method of Claim 12 including adding soluble salt to said solution which upon heating to remove solvent sublimates to provide microporosity to said sheet material.
Claim 17
Dependent Claim
35 words
The method of Claim 12 including applying a pressure sensitive adhesive to one side of said sheet material, said pressure sensitive adhesive being a solution of a soluble protein derivative and a synthetic organic polymer.
Claim 18
Dependent Claim
26 words
The method of Claim 12 wherein said sheet material has a moisture vapor permeability of greater than 300 g/m 2 /24 hours at 40 0 C.
References Cited (Backward Citations)
No citation records indexed.
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