Patent EP0409781A2 successfully refreshed from Google Patents.
EP0409781A2
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Polymer base blend compositions containing destructurized starch
Assignee: Warner Lambert Co LLC
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Filing: 1990-07-12
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Granted: —
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Expires: 2010-07-12
Abstract
Abstract A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) destructurized starch, and b) at least one polymer selected from the group of polysaccharides which have been chemically modified to contain added hydroxyalkyl groups and/or contain alkyl ether groups, and/or contain ester groups; said polymer being present in an amount effective to enhance the physical properties of said articles. The composition may contain further conventional additives as well as hydrophobic substantially water-insoluble polymers.
Inventors
- 👤 Jean-Pierre Sachetto
- 👤 Jakob Silbiger
- 👤 David John Lentz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 12:07
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
65 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 selected from the group of polysaccharides which have been chemically modified to contain added hydroxyalkyl groups and/or contain alkyl ether groups, and/or contain ester groups; said polymer being present in an amount effective to enhance the physical properties of said articles.
Claim 2
Dependent Claim
65 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 selected from the group of polysaccharides which have been chemically modified to contain added hydroxyalkyl groups and/or contain alkyl ether groups, and/or contain ester groups; said polymer being present in an amount effective to enhance the physical properties of said articles.
Claim 3
Dependent Claim
32 words
A composition of matter according to claim 1 wherein the polysaccharides which have been chemically modified are chosen from the group consisting of celluloses, starches and hemi-celluloses, preferably from celluloses or starches.
Claim 4
Dependent Claim
18 words
A composition of matter according to claim 2 wherein said polysaccharide which has been chemically modified is starch.
Claim 5
Dependent Claim
23 words
A composition of matter according to claim 1 wherein the polymer of component b) is an alkoxylated polysaccharide which contains hydroxy alkyl groups.
Claim 6
Dependent Claim
21 words
A composition of matter according to claim 4 wherein the alkoxylated polysaccharide further contains alkyl ether group and/or alkyl ester groups.
Claim 7
Dependent Claim
19 words
A composition of matter according to claim 4 wherein the alkoxylated polysaccharide contains hydroxy ethyl and/or hydroxy propyl groups.
Claim 8
Dependent Claim
36 words
A composition of matter according to claim 4 wherein the alkoxylated polysaccharide has a degree of substitution within the range of about 0.05 to about 2.5, preferably within the range of about 0.1 to about 1.5.
Claim 9
Dependent Claim
24 words
The composition according to a claim 1 wherein the weight % ratio of destructurized starch to component b) is about 1:99 to about 99:1.
Claim 10
Dependent Claim
27 words
The composition according to claim 8 wherein destructurized starch is present in amounts of about 50 % to about 99 % by weight of the total composition.
Claim 11
Dependent Claim
45 words
The composition according to claim 1 wherein the destructurized starch has a water content of about 5 % to about 40 % by weight of the total starch content, preferably of about 10 % to about 22 % by weight of the total starch content.
Claim 12
Dependent Claim
33 words
The composition according to claim 1 wherein there is additionally incorporated component c) comprising a substantially water-insoluble thermoplastic polymer which does not fall within the definition of those compounds defined as component b).
Claim 13
Dependent Claim
41 words
The composition according to claim 11 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, substantially water-insoluble or crystallizable poly(alkylene oxides), and mixtures thereof.
Claim 14
Dependent Claim
29 words
The composition of claim 12 wherein component c) is selected from the group consisting of polyethylenes, polypropylenes, polyisobutylenes, poly(vinyl chlorides), poly(vinyl acetates), polystyrenes; polyamides, polyesters, polyurethanes, polycarbonates, poly(alkylene terephthalates).
Claim 15
Dependent Claim
62 words
The composition according to claim 11 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, block copolymers of amide-ethers, amide-esters; block copolymers of urethane-esters and mixtures thereof.
Claim 16
Dependent Claim
54 words
The composition according to claim 13 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, block copolymers of amide-ethers, amide-esters; block copolymers of urethane-ethers, urethane-esters and mixtures thereof.
Claim 17
Dependent Claim
44 words
The composition according to claim 11 or 15 wherein the sum of components b) and c) constitute about 1 % to about 99 % by weight of the total composition, preferably about 20 % to about 80 % by weight of the total composition.
Claim 18
Dependent Claim
28 words
The composition according to claim 16 wherein the sum of components b) and c) constitutes about 1 % to about 30 % by weight of the total composition.
Claim 19
Dependent Claim
44 words
The composition according to claim 1 or 11 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 20
Dependent Claim
14 words
The composition according to claim 1 or 11 further containing an agriculturally active compound.
Claim 21
Dependent Claim
13 words
The composition according to claim 1 or 11 which is a melt blend.
Claim 22
Dependent Claim
14 words
The composition according to claim 1 or 11 which is a cooled solidified blend.
Claim 23
Dependent Claim
14 words
The composition according to claim 1 or 11 in particulate, granulated or pelletized form.
Claim 24
Dependent Claim
116 words
A thermoplastic destructurized-starch product made from a composition according to anyone of the claims 1 to 19, 21 or 22 having substantial dimensional stability formed by the process comprising: 1) providing a mixture comprising starch at least one polymer selected from the group of polysaccharides which have been chemically modified to contain added hydroxylkyl groups and/or contain alkyl ether groups, and/or contain ester groups, 2) heating said mixture in a closed volume under sufficient temperature and pressure for a time long enough to effectuate 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 25
Dependent Claim
25 words
The product according to claim 23 wherein destructurization of the starch is carried out at a temperature above its melting point and glass transition temperature.
Claim 26
Dependent Claim
34 words
The product according to claim 23 or 24 wherein the destructurization of the starch is carried out at temperatures of about 105°C to about 240°C, preferably at temperatures of about 130°C to about 190°C.
Claim 27
Dependent Claim
38 words
The product according to claim 24 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 28
Dependent Claim
35 words
The product according to claim 26 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 29
Dependent Claim
16 words
The product according to the claim 27 which is a granulate, a pellet or a powder.
Claim 30
Dependent Claim
35 words
The product according to claim 28 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 31
Dependent Claim
34 words
The shaped articles according to claim 28 or 35 or 48 wherein the further melting and processing comprises foaming, filming, compression molding, injection molding, blow molding, extruding, co-extruding, vacuum forming, thermoforming and combinations thereof.
Claim 32
Dependent Claim
91 words
A thermoplastic destructurized-starch substantially homogenous melt made from a composition according to anyone of the claims 1 to 19, 21 or 22 formed by the process comprising: 1) providing a mixture comprising starch at least one polymer selected from the group of polysaccharides which have been chemically modified to contain added hydroxylkyl groups and/or contain alkyl ether groups, and/or contain ester 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 33
Dependent Claim
33 words
The melt according to claim 31 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 34
Dependent Claim
38 words
The melt according to claim 32 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 35
Dependent Claim
35 words
The melt according to claim 33 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.
References Cited (Backward Citations)
No citation records indexed.
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