Patent EP0238197A2 successfully refreshed from Google Patents.
EP0238197A2
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Novel polymer barrier blends
Assignee: EIDP Inc
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Filing: 1987-02-13
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Granted: —
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Expires: 2007-02-13
Abstract
Abstract Polymer blends with barrier properties having low organic liquid and vapor permeability are obtained by blending an organic liquid and vapor-permeable polymer with an organic liquid and vapor barrier polymer in a 75:40 to 25:60 weight ratio to form a discrete dispersion of the polymers in each other and causing the organic liquid and vapor-permeable polymer to undergo branching or a limited amount of crosslinking with an increase of viscosity sufficient to cause the polymers to separate into distinct phases composed of larger particles.
Inventors
- 👤 Pallatheri Manackal Subramanian
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:47
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08L; C08L101/00; C08J3/02; C08J3/09; C08J3/11
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
139 words
1 . A process for producing a multiphase dispersion of high molecular weight solid polymers having either elastomeric or plastic properties consisting of an organic liquid and vapor barrier polymer dispersed in an organic liquid and vapor permeable polymer, both polymers having compatible functional groups such that the polymers can initially form a discrete dispersion in one another without substantially reacting and crosslinking; said process comprising blending said polymers in a weight ratio of about 25 to 60% of organic liquid and vapor barrier polymer and 75 to 40% of organic liquid and vapor permeable polymer and causing the permeable polymer to undergo branching or limited amount of crosslinking with an increase of viscosity sufficient to cause both polymers to form distinct, separate phases composed of larger particles, the resulting blend having improved organic liquid and vapor barrier properties.
Claim 2
Dependent Claim
139 words
1 . A process for producing a multiphase dispersion of high molecular weight solid polymers having either elastomeric or plastic properties consisting of an organic liquid and vapor barrier polymer dispersed in an organic liquid and vapor permeable polymer, both polymers having compatible functional groups such that the polymers can initially form a discrete dispersion in one another without substantially reacting and crosslinking; said process comprising blending said polymers in a weight ratio of about 25 to 60% of organic liquid and vapor barrier polymer and 75 to 40% of organic liquid and vapor permeable polymer and causing the permeable polymer to undergo branching or limited amount of crosslinking with an increase of viscosity sufficient to cause both polymers to form distinct, separate phases composed of larger particles, the resulting blend having improved organic liquid and vapor barrier properties.
Claim 3
Dependent Claim
33 words
A process of Claim 1 wherein the organic liquid and vapor permeable polymer has pendant groups belonging to one or more types selected from carboxyl, ester, anhydride, epoxide, and hydroxyl. or Claim 2
Claim 4
Dependent Claim
36 words
A process of Claim 1/wherein the organic liquid and vapor barrier polymer is selected from polyamides, polyesters, polyvinyl chloride, polyvinylidene chloride, ethylene/vinyl alcohol copolymers containing less than about 50% by weight of ethylene, polyketones and polyacrylonitrile.
Claim 5
Dependent Claim
19 words
A process of Claim 3 wherein the organic liquid and vapor barrier polymer is a polyamide or a polyester.
Claim 6
Dependent Claim
39 words
A process of Claim 4 wherein the organic liquid and vapor barrier polymer is selected fr-om the group consisting of poly(hexamethylene adipamide), poly(E-caprolactam), and blends thereof; and poly(ethylene terephthalate), poly(tetramethylene terephthalate), and blends thereof. any one of to 5
Claim 7
Dependent Claim
19 words
A process of/Claimsl/wherein branching or crosslinking is obtained by blending the polymers in the presence of a coupling agent.
Claim 8
Dependent Claim
24 words
A process of Claim 6 wherein the coupling agent is selected from free radical generators and vulcanizing agents for curing polymers having functional groups.
Claim 9
Dependent Claim
18 words
A process of Claim 7 wherein the coupling agent is selected from peroxides, peroxyacids, peroxyesters, and azo compounds.
Claim 10
Dependent Claim
23 words
A process of Claim 7 wherein the coupling agent is sulfur, a polysulfide, a diamine, or a diepoxide. any one of to 5
Claim 11
Dependent Claim
18 words
A process of/Claims 1/wherein branching or crosslinking is obtained by exposing the polymer blend to high energy radiation.
Claim 12
Dependent Claim
63 words
A multiphase polymer blend having low organic liquid and vapor permeability, said blend consisting essentially of about 25-60% by weight of an organic liquid and vapor barrier polymer and 75-40% by weight of an organic liquid and vapor permeable polymer, wherein the polymers form distinct, separate phases, and the organic liquid and vapor permeable polymer is branched or, to a limited degree, crosslinked.
Claim 13
Dependent Claim
63 words
A multiphase polymer blend having low organic liquid and vapor permeability, said blend consisting essentially of about 25-60% by weight of an organic liquid and vapor barrier polymer and 75-40% by weight of an organic liquid and vapor permeable polymer, wherein the polymers form distinct, separate phases, and the organic liquid and vapor permeable polymer is branched or, to a limited degree, crosslinked.
Claim 14
Dependent Claim
41 words
A blend of Claim 11 wherein the organic liquid and vapor-permeable polymer is an ethylene copolymer selected from copolymers of ethylene with at least one monomer selected from unsaturated carboxylic acids, unsaturated esters, acrylonitrile, carbon monoxide, and vinyl acetate. or 12
Claim 15
Dependent Claim
43 words
A blend of Claim 11/wherein the organic liquid and vapor barrier polymer is selected from polyamides, polyesters, polyvinyl chloride, polyvinylidene chloride, ethylene/vinyl alcohol copolymers in which the ethylene comonomer is present in an amount of less than 50% by weight, polyketones, and polyacrylonitrile.
Claim 16
Dependent Claim
25 words
A blend of Claim 13 wherein the organic liquid and vapor barrier polymer is selected from poly(hexamethylene adipamide), poly( -caprolactam), poly(ethylene terephthalate), and poly(tetramethylene terephthalate).
Claim 17
Dependent Claim
31 words
A blend of any one of Claims 11 to 14 which also contains up to about 10% of the total polymer weight of a finely ground filler. Claims 11 to 15
Claim 18
Dependent Claim
45 words
A blend of any one of/in which branching or crosslinking of the organic liquid and vapor-permeable polymer is obtained by means of a coupling agent selected from free radical generating compounds and vulcanizing agents capable of reacting with pendant functional groups of the ethylene copolymer.
Claim 19
Dependent Claim
45 words
A blend of any one of/in which branching or crosslinking of the organic liquid and vapor-permeable polymer is obtained by means of a coupling agent selected from free radical generating compounds and vulcanizing agents capable of reacting with pendant functional groups of the ethylene copolymer.
Claim 20
Dependent Claim
23 words
A blend of Claim 16 wherein the coupling agent is a free radical generating compound selected from peroxides, peroxyacids, peroxyesters, and azo compounds.
Claim 21
Dependent Claim
17 words
A blend of Claim 16 wherein the coupling agent is selected from sulfur, polysulfides, diamines, and diepoxides.
Claim 22
Dependent Claim
15 words
An article melt-fabricated from a polymer blend of any one of Claims 11 to 18.
References Cited (Backward Citations)
No citation records indexed.
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