EP0405793A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Radiation resistant heat sealable polymer blends of compatible polymers and methods of preparing same
Assignee: 3M Co
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Filing: 1990-06-13
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Granted: —
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Expires: 2010-06-13
Abstract
Abstract Polymer blends of non-crystalline mesomorphous polypropylene and a polymer compatible with such polypropylene and the method of making such polymer blends are provided. Such compatible polymer blends exhibit substantial maintenance of structural integrity after exposure to gamma irradiation and provide heat sealing properties, puncture resistance, and tear strength. Films, fibers, and other articles made from such blends may be used in various applications, including medical articles such as medical packaging films, ostomy pouches, and transdermal delivery patches, which may require sterilized storage prior to usage.
Inventors
- 👤 Richard J.C/O Minnesota Mining And Rolando
- 👤 Dennis L C/O Minnesota Mining And Krueger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 00:44
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61L; A61L2/00; A61L2/02; A61L2/08; C08L23/18; C08L23/20; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0853; C08L23/14; C08L23/142; C08L23/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
20 words
A polymer blend comprising: non-crystalline mesomorphous polypropylene; and at least a discernible amount of a polymer compatible with said polypropylene.
Claim 2
Dependent Claim
20 words
A polymer blend comprising: non-crystalline mesomorphous polypropylene; and at least a discernible amount of a polymer compatible with said polypropylene.
Claim 3
Dependent Claim
13 words
A polymer blend according to Claim 1, wherein said compatible polymer is polybutylene.
Claim 4
Dependent Claim
34 words
A polymer blend according to Claim 1, wherein the blend is capable of substantially maintaining its structural integrity after exposure to a dosage of gamma irradiation of from about 0.5 to about 10 Mrads.
Claim 5
Dependent Claim
18 words
A polymer blend according to Claim 1, wherein the blend is heat-sealable to itself or other heat-sealable materials.
Claim 6
Dependent Claim
9 words
A polymer blend of non-crystalline mesomorphous polypropylene and polybutylene.
Claim 7
Dependent Claim
9 words
A polymer blend of non-crystalline mesomorphous polypropylene and polybutylene.
Claim 8
Independent Claim
47 words
A method for preparing a polymer blend, comprising: blending polypropylene and a polymer compatible with said polypropylene to form a polymer blend; extruding said polymer blend; quenching said extruded polymer blend immediately after said extruding to provide a mesophorous polymer blend having non-crystalline mesomorphous polypropylene contained therein.
Claim 9
Independent Claim
47 words
A method for preparing a polymer blend, comprising: blending polypropylene and a polymer compatible with said polypropylene to form a polymer blend; extruding said polymer blend; quenching said extruded polymer blend immediately after said extruding to provide a mesophorous polymer blend having non-crystalline mesomorphous polypropylene contained therein.
Claim 10
Dependent Claim
27 words
A polymer blend according to Claim 1, wherein said blend comprises a film and wherein said film further comprises a surface adhesion layer grafted to said film.
Claim 11
Dependent Claim
37 words
A polymer blend according to Claim 7, wherein said surface adhesion layer comprises acrylic acid, dimethylacrylamide, N-vinyl-2-pyrrolidone, a copolymer of N-vinyl-2-pyrrolidone and trimethylolpropanetriacrylate, glycidyl acrylate, hydroxyethyl acrylate, hydroxymethyl acrylate, 2-vinyl pyridine, sulfoethyl methacrylate, eliisopropylacrylamide, or N,N-diamino acrylate.
Claim 12
Dependent Claim
68 words
A method for preparing a polymer blend according to Claim 6, wherein said quenching further comprises forming a film of the polymer blend, and wherein said method further comprises after said forming of a film of the polymer blend, the step of grafting a surface adhesion layer to said film in the presence of electron beam irradiation in dosages of from about 0.5 Mrad to about 20 Mrad.
Claim 13
Dependent Claim
41 words
A method for preparing a polymer blend according to Claim 9, wherein said surface adhesion layer comprises acrylic acid, dimethylacrylamide, N-vinyl-2-pyrrolidone, a copolymer of N-vinyl-2-pyrrolidone and trimethylolpropanetriacrylate, glycidyl acrylate, hydroxyethyl acrylate, hydroxymethyl acrylate, 2-vinyl pyridine, sulfoethyl methacrylate, eliisopropylacrylamide, or N,N-diamino acrylate.
References Cited (Backward Citations)
No citation records indexed.
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