US4600746A
Expired / Lapsed
US
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Polyvinyl alcohol alloys and method of making the same
Assignee: Enron Chemical Co
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Filing: 1985-10-11
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Granted: 1986-07-15
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Expires: 2005-10-11
Abstract
Abstract A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer to provide a product which has low gas permeability and water absorptivity characteristics, and which has a melting point sufficiently below its decomposition point to allow melt extrusion. The alloy may optionally be mixed with a polyolefin blending resin.
Inventors
- 👤 Seymour Schmukler
- 👤 Mitsuzo Shida
- 👤 John Machonis, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08G; C08G81/00; C08G81/02; C08L51/00; C08L51/06; C08L23/00; C08L23/02; C08L23/04; C08L23/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
157 words
A melt processable polymer alloy prepared by the method comprising the steps of: (a) providing a polyvinyl alcohol polymer having a degree of hydrolysis of less than about 90 mole percent and a degree of polymerization of about 300 to 900, inclusive; (b) providing a functional polymer comprising a polyolefin or an ethylene-ester copolymer having functional groups reactive with the hydroxyl groups of said polyvinyl alcohol polymer incorporated therein by copolymerization, said functional groups comprising one or more of a carboxylic acid, a carboxylic acid anhydride, a metal salt of a carboxylic acid, or a derivative thereof; and, (c) thereafter reacting said polyvinyl alcohol polymer with less than a stoichiometric amount of said functional polymer to provide a mixture of grafted and ungrafted polyvinyl alcohol polymers, said grafted polyvinyl alcohol polymer having less than all available hydroxyl groups reacted with said functional groups, said polyvinyl alcohol polymer comprising at least about 70 weight percent of said mixture.
Claim 2
Dependent Claim
157 words
A melt processable polymer alloy prepared by the method comprising the steps of: (a) providing a polyvinyl alcohol polymer having a degree of hydrolysis of less than about 90 mole percent and a degree of polymerization of about 300 to 900, inclusive; (b) providing a functional polymer comprising a polyolefin or an ethylene-ester copolymer having functional groups reactive with the hydroxyl groups of said polyvinyl alcohol polymer incorporated therein by copolymerization, said functional groups comprising one or more of a carboxylic acid, a carboxylic acid anhydride, a metal salt of a carboxylic acid, or a derivative thereof; and, (c) thereafter reacting said polyvinyl alcohol polymer with less than a stoichiometric amount of said functional polymer to provide a mixture of grafted and ungrafted polyvinyl alcohol polymers, said grafted polyvinyl alcohol polymer having less than all available hydroxyl groups reacted with said functional groups, said polyvinyl alcohol polymer comprising at least about 70 weight percent of said mixture.
Claim 3
Dependent Claim
26 words
The alloy of claim 1 wherein said polyvinyl alcohol polymer is between about 70 and 90 mole percent hydrolyzed prior to reaction with said functional polymer.
Claim 4
Dependent Claim
29 words
The alloy of claim 1 wherein said functional polymer is an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-alkyl acrylate-acrylic acid copolymer, or an ethylene-alkyl methacrylate-methacrylic acid copolymer.
Claim 5
Dependent Claim
34 words
The alloy of claim 1 wherein said functional polymer is the partially neutralized salt of an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-alkyl acrylate-acrylic acid copolymer, or an ethylene-alkyl methacrylate-methacrylic acid copolymer.
Claim 6
Dependent Claim
33 words
The alloy of claim 1 which additionally contains a blending resin comprising an olefin homopolymer or copolymer compatible with said mixture of grafted and ungrafted polyvinyl alcohol polymers melt blended with said mixture.
Claim 7
Dependent Claim
33 words
The alloy of claim 5 wherein said alloy comprises between about 99 and 85 weight percent of said mixture of (c) and, correspondingly, between 1 and 15 weight percent of said blending resin.
Claim 8
Dependent Claim
17 words
The alloy of claim 1 formed into a gas barrier film, sheet, tube, coating, bottle or profile.
Claim 9
Dependent Claim
17 words
The alloy of claim 5 formed into a gas barrier film, sheet, tube, coating, bottle or profile.
Claim 10
Dependent Claim
45 words
An article formed of the alloy of claim 1 by one or more methods chosen from the group consisting of blown film extrusion, cast film extrusion, extrusion coating, coextrusion, coextrusion coating, injection molding, blow molding, rotomolding, compression molding, profile extrusion, pipe extrusion, and tubing extrusion.
Claim 11
Dependent Claim
45 words
An article formed of the alloy of claim 5 by one or more methods chosen from the group consisting of blown film extrusion, cast film extrusion, extrusion coating, coextrusion, coextrusion coating, injection molding, blow molding, rotomolding, compression molding, profile extrusion, pipe extrusion, and tubing extrusion.
Claim 12
Independent Claim
157 words
A method of preparing a melt processable polymer alloy comprising the steps of: (a) providing a polyvinyl alcohol polymer having a degree of hydrolysis of less than about 90 mole percent and a degree of polymerization of about 300 to 900, inclusive; (b) providing a functional polymer comprising a polyolefin or an ethylene-ester copolymer having functional groups reactive with the hydroxyl groups of said polyvinyl alcohol polymer incorporated therein by copolymerization, said functional groups comprising one or more of a carboxylic acid, a carboxylic acid anhydride, a metal salt of a carboxylic acid, or a derivative thereof; and, (c) thereafter reacting said polyvinyl alcohol polymer with less than a stoichiometric amount of said functional polymer to provide a mixture of grafted and ungrafted polyvinyl alcohol polymers, said grafted polyvinyl alcohol polymer having less than all available hydroxyl groups reacted with said functional groups, said polyvinyl alcohol polymer comprising at least about 70 weight percent of said mixture.
Claim 13
Independent Claim
157 words
A method of preparing a melt processable polymer alloy comprising the steps of: (a) providing a polyvinyl alcohol polymer having a degree of hydrolysis of less than about 90 mole percent and a degree of polymerization of about 300 to 900, inclusive; (b) providing a functional polymer comprising a polyolefin or an ethylene-ester copolymer having functional groups reactive with the hydroxyl groups of said polyvinyl alcohol polymer incorporated therein by copolymerization, said functional groups comprising one or more of a carboxylic acid, a carboxylic acid anhydride, a metal salt of a carboxylic acid, or a derivative thereof; and, (c) thereafter reacting said polyvinyl alcohol polymer with less than a stoichiometric amount of said functional polymer to provide a mixture of grafted and ungrafted polyvinyl alcohol polymers, said grafted polyvinyl alcohol polymer having less than all available hydroxyl groups reacted with said functional groups, said polyvinyl alcohol polymer comprising at least about 70 weight percent of said mixture.
Claim 14
Dependent Claim
26 words
The method of claim 11 wherein said polyvinyl alcohol polymer is between about 70 and 90 mole percent hydrolyzed prior to reaction with said functional polymer.
Claim 15
Dependent Claim
29 words
The method of claim 11 wherein said functional polymer is an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-alkyl acrylate-acrylic acid copolymer, or an ethylene-alkyl methacrylate-methacrylic acid copolymer.
Claim 16
Dependent Claim
34 words
The method of claim 11 wherein said functional polymer is the partially neutralized salt of an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-alkyl acrylate-acrylic acid copolymer, or an ethylene-alkyl methacrylate-methacrylic acid copolymer.
Claim 17
Dependent Claim
37 words
The method of claim 11 including the additional step of melt blending with said mixture of (c) a blending resin comprising an olefin homopolymer or copolymer compatible with said mixture of grafted and ungrafted polyvinyl alcohol polymers.
Claim 18
Dependent Claim
33 words
The method of claim 15 wherein said alloy comprises between about 99 and 85 weight percent of said mixture of (c) and, correspondingly, between 1 and 15 weight percent of said blending resin.
Claim 19
Dependent Claim
21 words
The method of claim 11 wherein said alloy is formed into a gas barrier film, sheet, tube, coating, bottle or profile.
Claim 20
Dependent Claim
21 words
The method of claim 15 wherein said alloy is formed into a gas barrier film, sheet, tube, coating, bottle or profile.
Claim 21
Dependent Claim
49 words
The method of claim 11 wherein said alloy is formed into an article by one or more methods chosen from the group consisting of blown film extrusion, cast film extrusion, extrusion coating, coextrusion, coextrusion coating, injection molding, blow molding, rotomolding, compression molding, profile extrusion, pipe extrusion, and tubing extrusion.
Claim 22
Dependent Claim
49 words
The method of claim 15 wherein said alloy is formed into an article by one or more methods chosen from the group consisting of blown film extrusion, cast film extrusion, extrusion coating, coextrusion, coextrusion coating, injection molding, blow molding, rotomolding, compression molding, profile extrusion, pipe extrusion, and tubing extrusion.
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