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EP0215150A1
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EP
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Alloys of vinylidene chloride interpolymers and olefin polymers
Assignee: Dow Chemical Co
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Filing: 1985-09-18
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Granted: —
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Expires: 2005-09-18
Abstract
Abstract A compatibilized blend of at least three polymers is provided. One polymer is a vinylidene chloride interpolymer, such as a copolymer of vinylidene chloride and vinyl chloride. A second polymer is an olefin polymer, such as polyethylene. A third polymer is a compatibilizing polymer such as an ethylene/alkyl acrylate or an ethylene/alkyl methacrylate copolymer. The compatibilized blend, after melt processing, has mechanical properties which are better than those predicted by a straight line volume fraction relationship of the vinylidene chloride interpolymer and the olefin polymer. Impact energy is one mechanical properties which is greater for the compatibilized blend than for the two-component blend of the vinylidene chloride interpolymer and the olefin polymer.
Inventors
- 👤 Bill E. Burgert
- 👤 Dan E. Ranck
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:24
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08L23/04; C08L23/08; C08L23/26; C08L23/28
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
128 words
A compatibilized blend of polymers comprising: (a) a vinylidene chloride interpolymer, the interpolymer having polymerized therein vinylidene chloride in an amount of from 40 to 98 percent by weight of interpolymer and at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from 60 to 2 percent by weight of interpolymer; (b) an olefin polymer and (c) a compatibilizing amount of a compatibilizing polymer, said compatibilizing polymer being selected from the group consisting of (i) ethylene interpolymers having polymerized therein from 97 to 60 weight percent of ethylene and from 3 to 40 weight percent of at least one. oxygen containing species copolymerizable therewith; and (ii) olefin polymers having halogen chemically affixed thereto in an amount of from 24 to 44 percent by weight of polymer.
Claim 2
Dependent Claim
128 words
A compatibilized blend of polymers comprising: (a) a vinylidene chloride interpolymer, the interpolymer having polymerized therein vinylidene chloride in an amount of from 40 to 98 percent by weight of interpolymer and at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from 60 to 2 percent by weight of interpolymer; (b) an olefin polymer and (c) a compatibilizing amount of a compatibilizing polymer, said compatibilizing polymer being selected from the group consisting of (i) ethylene interpolymers having polymerized therein from 97 to 60 weight percent of ethylene and from 3 to 40 weight percent of at least one. oxygen containing species copolymerizable therewith; and (ii) olefin polymers having halogen chemically affixed thereto in an amount of from 24 to 44 percent by weight of polymer.
Claim 3
Dependent Claim
100 words
The compatibilized blend of Claim 1 wherein the olefin polymers of (b) are selected from the group consisting of (1) low density polyethylene; - (2) medium density polyethylene, (3) high density polyethylene, (4) polypropylene, (5) poly 1-butene, (6) generally linear interpolymers of ethylene having polymerized therein from 2 to 98 weight percent of ethylene and from 98 to 2 weight percent of at least one 1-alkene, said alkene having from 3 to 18 carbon atoms, (7) interpolymers of two or more alpha-olefins having from 3 to 18 carbon atoms per molecule, and (8) rubbery ethylene-propylenediene monomer interpolymers, and mixtures thereof.
Claim 4
Dependent Claim
18 words
The compatibilized blend of Claim 1 having a ratio of (a) to (b) of from 9:1 to 1:9.
Claim 5
Dependent Claim
20 words
The compatibilized blend of Claim 1 having a ratio of (a) to (b) of from about 1:1 to about 1:9.
Claim 6
Dependent Claim
36 words
The compatibilized blend of Claim 1 wherein the monomer copolymerizable with vinylidene chio- ride is selected from the group consisting of vinyl chloride, alkyl acrylates, alkyl methacrylates, acrylic acid, methacrylic acid, itaconic acid, acrylonitrile and methacrylonitrile.
Claim 7
Dependent Claim
45 words
The compatibilized blend of Claim 1 wherein the vinylidene chloride interpolymer has polymerized therein vinylidene chloride in an amount of from 89 to 95 percent by weight of interpolymer and methyl acrylate in an amount of from 11 to 5 percent by weight of interpolymer.
Claim 8
Dependent Claim
57 words
The compatibilized blend of Claim 2 wherein the olefin polymer of (b) is low density polyethylene, the low density polethyelne having a density of from 0.917 to 0.929 grams per cubic centimeter and a melt index, measured in accordance with American Society for Testing and Materials Test D-1238, of from 0.1 to 20 grams per 10 minutes.
Claim 9
Dependent Claim
57 words
The compatibilized blend of Claim 2 wherein the olefin polymer of (b) is medium density polyethylene, the medium density polyethylene having a density of from 0.930 to 0.939 grams per cubic centimeter and a melt index, measured in accordance with American Society for Testing and Materials Test D-1238, of from 0.08 to 100 grams per 10 minutes.
Claim 10
Dependent Claim
57 words
The compatibilized blend of Claim 2 wherein the olefin polymer of (b) is high density polyethylene, the high density polyethylene having a density of from 0.940 to 0.965 grams per cubic centimeter and a melt index, measured in accordance with American Society for Testing and Materials Test D-1238, of from 0.08 to 100 grams per 10 minutes.
Claim 11
Dependent Claim
61 words
The compatibilized blend of Claim 2 wherein the olefin polymer of (b) is a linear copolymer of ethylene and at least one 1-alkene, the copolymer having polymerized therein ethylene in an amount of from 80 to 98 percent by weight of copolymer and one or more 1-alkenes in a total amount of from 20 to 2 percent by weight of copolymer.
Claim 12
Dependent Claim
44 words
The compatibilized blend of Claim 2 wherein the olefin polymer of (b) is a copolymer of ethylene and at least one monomer copolymerizable therewith, the monomer being selected from the group consisting of alpha-olefin monomers having from 3 to 18 carbon atoms per molecule.
Claim 13
Dependent Claim
147 words
The compatibilized blend of Claim 1 wherein the compatiblizing polymer is selected from the group consisting of (a) ethylene interpolymers having polymerized therein from 97 to 60 weight percent of ethylene and from 3 to 40 weight percent of at least one ethylenically unsaturated carboxylic acid monomer copolymerizable therewith, the interpolymer being esterified after preparation thereof; (b) copolymers of ethylene and at least one alkyl acrylate, the alkyl acrylate having from 1 to 8 carbon atoms per alkyl group; (c) copolymers of ethylene and at least one alkyl methacrylate, the alkyl methacrylate having from 1 to 8 carbon atoms per alkyl group; (d) copolymers of ethylene and carbon monoxide; (e) interpolymers of ethylene, carbon monoxide and (1) an ester of an ethylenically unsaturated carboxylic acid or (2) vinyl acetate; (f) copolymers of ethylene and vinyl acetate; and (g) ethyl oxazoline modified copolymers of ethylene and acrylic acid.
Claim 14
Dependent Claim
73 words
The compatibilized blend of Claim 1 wherein the compatibilizing polymer is selected from the group consisting of (a) copolymers of ethylene and at least one alkyl acrylate, the alkyl acrylate having from 1 to 4 carbon atoms per alkyl group; (b) copolymers of ethylene and at least one alkyl methacrylate, the alkyl methacrylate having from 1 to 4 carbon atoms per alkyl groups; and (c) 2-ethyl-2-oxazoline modified copolymers of ethylene and acrylic acid.
Claim 15
Dependent Claim
53 words
The compatibilized blend of Claim 1 wherein the compatibilizing polymer is a copolymer of ethylene and methyl acrylate, the copolymer having polymerized therein ethylene in an amount of from 95 to 80 percent by weight of copolymer and methyl acrylate in an amount of from 5 to 20 percent by weight of copolymer.
Claim 16
Dependent Claim
33 words
The compatibilized blend of Claim 1 wherein said compatible blend has an impact energy which is greater than the impact energy of a blend of the vinylidene chloride interpolymer and the olefin polymer.
Claim 17
Dependent Claim
23 words
The compatiblized blend of Claim 1 wherein the compatibilizing amount is from 2 to 35 parts per hundred parts of (a) plus (b).
Claim 18
Dependent Claim
20 words
A compatibilized blend of Claim 1 wherein said olefin polymer is a copolymer of ethylene and at least one alpha-olefin.
Claim 19
Dependent Claim
49 words
A compatibilized blend of polymers according to Claim 1 having an oxygen permeability rate less than 1.76 measured as cubic centimeters of oxygen times centimeters of sample thickness divided by the product of (a) area in square centimeters (b) one second and (c) barometric pressure in of mercury centimeters.
Claim 20
Dependent Claim
123 words
A process for the preparation of a compatibilized blend of polymers comprising: (a) a vinylidene chloride interpolymer, the interpolymer having polymerized therein vinylidene chloride in an amount of from 40 to 98 percent by weight of interpolymer and at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from 60 to 2 percent by weight of interpolymer; (b) an olefin polymer and (c) a compatibilizing amount of a compatibilizing polymer, said compatibilizing polymer being selected from the group consisting of (i) ethylene interpolymers having polymerized therein from 97 to 60 weight percent of ethylene and from 3 to 40 weight percent of at least one oxygen containing species copolymerizable therewith; characterized in that the admixture of said three polymeric components (a),
Claim 21
Dependent Claim
123 words
A process for the preparation of a compatibilized blend of polymers comprising: (a) a vinylidene chloride interpolymer, the interpolymer having polymerized therein vinylidene chloride in an amount of from 40 to 98 percent by weight of interpolymer and at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from 60 to 2 percent by weight of interpolymer; (b) an olefin polymer and (c) a compatibilizing amount of a compatibilizing polymer, said compatibilizing polymer being selected from the group consisting of (i) ethylene interpolymers having polymerized therein from 97 to 60 weight percent of ethylene and from 3 to 40 weight percent of at least one oxygen containing species copolymerizable therewith; characterized in that the admixture of said three polymeric components (a),
Claim 22
Dependent Claim
35 words
(b) and (c) is melt blended at the temperature below that at which decomposition of the vinylidene chloride interpolymer becomes significant and under shear sufficient to provide a visually homogeneous blend within reasonable mixing time.
Claim 23
Dependent Claim
35 words
(b) and (c) is melt blended at the temperature below that at which decomposition of the vinylidene chloride interpolymer becomes significant and under shear sufficient to provide a visually homogeneous blend within reasonable mixing time.
Claim 24
Dependent Claim
34 words
A process for the preparation of a compatibilized blend of polymers according to Claim 19, characterized in that the melt blending of the admixture of said three polymeric components is accomplished in two stages.
Claim 25
Dependent Claim
16 words
A process of Claim 20, characterized in that the melt blending is accomplished in an extruder.
Claim 26
Dependent Claim
45 words
A process of Claim 21 characterized in that the three zones of the extruder are kept at the following temperatures: (a) hotter zone at a temperature from 160-165°C, (b) melt zone at a temperature from 165-170°C, and (c) die zone at a temperature from 170-175°C.
References Cited (Backward Citations)
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