EP0404723A2
Expired / Lapsed
EP
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Polymer base blend compositions containing destructurized starch
Assignee: Warner Lambert Co LLC
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Filing: 1990-06-14
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Granted: —
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Expires: 2010-06-14
Abstract
Abstract A thermoplastic polymer composition comprising a) a destructurized starch, and b) an effective amount of at least one polymer which contains at least two different types of functional groups, one of said types of these groups being hydroxyl groups. The composition may contain further conventional additives as well as hydrophobic, substantially water-insoluble polymers.
Inventors
- 👤 Jean-Pierre Dr. Sachetto
- 👤 David John Dr. Lentz
- 👤 Jakob Dr. Silbiger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 11:57
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02; C08L29/00; C08L29/02; C08L29/04; C08L57/00; C08L57/06; C08L57/10
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
57 words
A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) destructurized starch, and b) at least one polymer which contains at least two different types of functional groups, one of said types being hydroxyl groups, said polymer being present in an amount effective to enhance the physical properties of said articles.
Claim 2
Dependent Claim
57 words
A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) destructurized starch, and b) at least one polymer which contains at least two different types of functional groups, one of said types being hydroxyl groups, said polymer being present in an amount effective to enhance the physical properties of said articles.
Claim 3
Dependent Claim
16 words
The composition according to claim 1 wherein the polymer of component b) contains vinyl alcohol units.
Claim 4
Dependent Claim
23 words
The composition according to claim 2 wherein the polymer of component b) is a poly(vinyl ester) wherein the ester groups are partially hydrolyzed.
Claim 5
Dependent Claim
74 words
The composition according to claim 2 wherein the polymer of component b) is a copolymer containing vinyl alcohol units as well as other units as are obtained by polymerization of vinyl esters with one or more monomers selected from the group consisting of ethylene, vinyl chloride, vinyl ethers, acrylonitrile, acryl amide, omega-octadecene, vinyl butyl ether, vinyl-octadecyl ether, vinyl pyrrolidone and other known monomers, with subsequent hydrolysis of at least some of the vinyl-ester groups.
Claim 6
Dependent Claim
57 words
The composition according to claim 4 wherein the copolymer of component b) is selected from the group consisting of poly(vinyl alcohol-co-vinylacetate), ethylene/vinyl alcohol/ vinyl acetate copolymers, ethylene/vinyl chloride/vinyl alcohol/vinyl acetate graft copolymers, vinyl alcohol/vinyl acetate/vinyl chloride copolymers, vinyl alcohol/vinyl acetate/vinyl chloride/diacryl amide copolymers, vinyl alcohol/vinyl butyral copolymers, vinyl alcohol/vinyl acetate/vinyl pyrrolidone copolymers, and mixtures or combinations thereof.
Claim 7
Dependent Claim
49 words
The composition according to claim 4 wherein the polymer of component b) is a copolymer as obtained by polymerization of a vinyl ester with one or more monomers selected from the group consisting of ethylene, vinyl ethers, with subsequent hydrolysis of at least some of the vinyl ester groups.
Claim 8
Dependent Claim
80 words
A composition according to claim 1 wherein component b) is a polymer or a copolymer as obtained from polymerizing or copolymerizing monomers: of the formula wherein R₂ is hydrogen or methyl; and X is an organic moiety with up to 8 carbon atoms substituted by 1 to 3 hydroxyl groups and/or containing 1 or 2 carboxylate groups and does not form a vinyl alcohol or of an ester derivative of maleic acid or fumaric acid which optionally contain hydroxyl groups.
Claim 9
Dependent Claim
45 words
A composition according to claim 7 wherein component b) is a polymer or a copolymer of one or more compounds of the formula CH₂=C(R₂)X₁, wherein X₁ is -CH₂OH, -O-CH₂-CH₂-OH, -C(O)OCH₂-CH₂OH or -C₆H₄-O-CH₂-CH₂OH, and/or of a compound of the formula HOCH₂-CH₂-O(O)C-HC = HC-C(O)O-CH₂-CH₂OH (cis or trans)
Claim 10
Dependent Claim
64 words
A composition according to claim 7 wherein the polymer of component b) is a copolymer of a monomer of a compound of formula CH₂=C(R₂)X or said derivatives of maleic or fumaric acid copolymerized with one or more vinyl esters, ethylene, vinyl chloride, vinyl esters, acrylonitrile, methacrylic acid esters, maleic acid esters, acrylamide, omega-octadecene, vinyl butyl ether, vinyl-octadecyl ether, vinyl pyrrolidone and other known monomers.
Claim 11
Dependent Claim
26 words
A composition according to claim 9 wherein the weight % of the hydroxyl moiety (-OH) is from 4.5 to 35 weight percent of the component b).
Claim 12
Dependent Claim
45 words
The composition according to claim 1 wherein the weight % ratio of destructurized starch to component b) is about 1:99 to about 99:1, preferably wherein destructurized starch is present in amounts of about 50 % to about 99 % by weight of the total composition.
Claim 13
Dependent Claim
38 words
The composition according to anyone of the claims 1 to 11 wherein there is additionally incorporated component c) comprising an substantially water-insoluble thermoplastic polymer which does not fall within the definition of those compounds defined as component b).
Claim 14
Dependent Claim
43 words
The composition according to claim 12 wherein said component c) is selected from the group consisting of polyolefines, vinyl polymers, polystyrenes, polyacrylonitriles, poly(vinyl carbazols), polyacrylates, polymethacrylates, polyacetals, thermoplastic polycondensates, polyarylethers, thermoplastic polyimides, high molar-mass substantially water-insoluble or crystallizable poly(alkylene oxides), and mixtures thereof.
Claim 15
Dependent Claim
28 words
The composition of claim 13 wherein component c) is selected from the group consisting of polyethylenes, polypropylenes, polyisobutylenes, ethylene oxide polymers, propylene oxide polymers, polystyrene and mixtures thereof.
Claim 16
Dependent Claim
30 words
The composition of claim 13 wherein component c) is selected from the group consisting of poly(vinyl chlorides), poly(vinyl acetate), polyamides, thermoplastic polyesters, thermoplastic polyurethanes, polycarbonates, poly(alkylene terephthalates) and mixtures thereof.
Claim 17
Dependent Claim
53 words
The composition according to claim 12 wherein component c) is selected from the group consisting of alkylene/vinyl ester-copolymers, alkylene/acrylate or methacrylate copolymers, ABS copolymers, styrene/acrylonitrile copolymers, alkylene/maleic anhydride copolymers, partially hydrolyzed polyacrylates or polymethacrylates, partially hydrolyzed copolymers of acrylates and methacrylates, acrylic acid esters/acrylonitrile copolymers and hydrolysates thereof, acrylamide/acrylonitrile copolymers and mixtures thereof.
Claim 18
Dependent Claim
44 words
The composition according to claim 16 wherein component c) is selected from the group consisting of ethylene/vinyl acetate copolymers (EVA), ethylene/vinyl alcohol copolymers (EVAL), ethylene/acrylic acid copolymers (EAA), ethylene/ethyl acrylate copolymers (EEA), ethylene/methacrylate copolymers (EMA), styrene/acrylonitrile copolymers (SAN), ethylene/maleic anhydride copolymers and mixtures thereof.
Claim 19
Dependent Claim
44 words
The composition according to anyone of the claims 12 to 17 wherein the sum of components b) and c) constitute about 1% to about 99%, preferably about 20% to about 80% and preferably about 1% to about 30% by weight of the total composition.
Claim 20
Dependent Claim
40 words
The composition according to anyone of the claims 1 to 18 wherein the destructurized starch has a water content of about 5% to about 40% and preferably of about 10% to about 22% by weight of the total starch content.
Claim 21
Dependent Claim
47 words
The composition according to anyone of the claim 1 or 19, wherein there are additionally incorporated one or more materials selected from the group consisting of adjuvants, fillers, lubricants, mold release agents, plasticizers, foaming agents, stabilizers, extenders, chemical modifiers, flow accelerators, coloring agents, pigments and mixtures thereof.
Claim 22
Dependent Claim
17 words
The composition according to anyone of the claims 1 to 20 further containing an agriculturally active compound.
Claim 23
Dependent Claim
16 words
The composition according to anyone of the claims 1 to 21 which is a melt blend.
Claim 24
Dependent Claim
17 words
The composition according to anyone of the claims 1 to 21 which is a cooled solidified blend.
Claim 25
Dependent Claim
12 words
The composition according to claim 23 in particulate, granulated or pelletized form.
Claim 26
Dependent Claim
109 words
A thermoplastic destructurized-starch product having substantial dimensional stability, made from a composition as claimed in anyone of the claims 1 to 21, formed by the process comprising: 1) providing a mixture comprising starch and at least one polymer which contains at least two different types of functional groups, one of said types being hydroxyl groups (component b); 2) heating said mixture in a closed volume under sufficient temperature and pressure for a time long enough to effect destructurization of said starch and form a substantially homogenous melt; 3) shaping said melt into an article; and 4) allowing said shaped article to cool to a substantially dimensionally stable thermoplastic product.
Claim 27
Dependent Claim
25 words
The product according to claim 25 wherein destructurization of the starch is carried out at a temperature above its melting point and glass transition temperature.
Claim 28
Dependent Claim
33 words
The product according to claim 26 wherein the destructurization of the starch is carried out at temperatures of about 105°C to about 240°C and preferably at temperatures of about 130°C to about 190°C.
Claim 29
Dependent Claim
43 words
The product according to anyone of the claims 25 to 27 wherein the melt is formed under the range of pressure from the minimum pressure necessary to avoid formation of water vapour under the applied temperature up to about 150 x 10⁵ N/m².
Claim 30
Dependent Claim
40 words
The product according to anyone of the claims 25 to 28 wherein the heat and pressure are maintained until the starch has undergone the specific narrow endothermic transition just prior to its endothermic change characteristic of oxidative and thermal degradation.
Claim 31
Dependent Claim
20 words
The product according to anyone of the claims 25 to 28 which is a granulate, a pellet or a powder.
Claim 32
Dependent Claim
38 words
The product according to anyone of the claims 25 to 28 in the form of a shaped article selected from the group consisting of containers, bottles, pipes, rods, packaging material, sheets, foams, films, sacks, bags and pharmaceutical capsules.
Claim 33
Dependent Claim
35 words
The product according to claim 30 further melted and processed to form a shaped article selected from the group consisting of containers, bottles, pipes, rods, packaging material, sheets, foams, films, sacks, bags and pharmaceutical capsules.
Claim 34
Dependent Claim
30 words
The shaped articles according to claims 31 and 28, wherein the shaping process comprises foaming, filming, compression molding, injection molding, blow molding, extruding, co-extruding, vacuum forming, thermoforming and combinations thereof.
Claim 35
Dependent Claim
82 words
A thermoplastic destructurized-starch substantially homogenous melt, made from a composition as claimed in anyone of the claims 1 to 21, formed by the process comprising: 1) providing a mixture comprising starch and at least one polymer which contains at least two different types of functional groups, one of said types being hydroxyl groups (component b); and 2) heating said mixture in a closed volume under sufficient temperature and pressure for a time long enough to destructurize said starch and form said melt.
Claim 36
Dependent Claim
25 words
The melt according to claim 34 wherein destructurization of the starch is carried out at a temperature above its melting point and glass transition temperature.
Claim 37
Dependent Claim
33 words
The melt according to claim 34 wherein destructurization of the starch is carried out at a temperature of about 105°C to about 240°C, preferably at a temperature of about 130°C to about 190°C.
Claim 38
Dependent Claim
43 words
The melt according to anyone of the claims 34 to 36, wherein the melt is formed under the range of pressure from the minimum pressure necessary to avoid formation of water vapour under the applied temperature up to about 150 x 10⁵ N/m².
Claim 39
Dependent Claim
35 words
The melt according to claim 37 wherein the heat and pressure are maintained until the starch has undergone the specific narrow endothermic transition just prior to its endothermic change characteristic of oxidative and thermal degradation.
Claim 40
Dependent Claim
40 words
The melt according to anyone of the claims 34 to 38 wherein said provided mixture additionally contains component c) comprising an substantially water- insoluble thermoplastic polymer which does not fall within the definition of those compounds defined as component b).
References Cited (Backward Citations)
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