Patent EP0409783A2 successfully refreshed from Google Patents.
EP0409783A2
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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 compound selected from the group consisting of polyalkyleneimine polymers and polyalkyleneimine copolymers; said modified polysaccharide 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 Dr. Sachetto
- 👤 Jakob Dr. Silbiger
- 👤 David Dr. Lentz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 18:15
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02; C08L79/00; C08L79/02
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
53 words
A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) destructurized starch, and b) at least one compound selected from the group consisting of polyalkyleneimine polymers and polyalkyleneimine copolymers; said polymers and copolymers being present in an amount effective to enhance the physical properties of said articles.
Claim 2
Dependent Claim
53 words
A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) destructurized starch, and b) at least one compound selected from the group consisting of polyalkyleneimine polymers and polyalkyleneimine copolymers; said polymers and copolymers being present in an amount effective to enhance the physical properties of said articles.
Claim 3
Dependent Claim
17 words
A composition according to claim 1 wherein said component b) is derived from unsubstitutet or substituted ethyleneimines.
Claim 4
Dependent Claim
25 words
A composition according to claim 2 wherein said component b) is derived from ethyleneimines which correspond to the formula wherein R₁ is hydrogen or methyl.
Claim 5
Dependent Claim
27 words
A composition according to claim 3 wherein component b) is a polyalkyleneimine as derived from a compound selected from the group consisting of ethyleneimine, N-acetyl-ethyleneimine and N-propionyl-ethyleneimine.
Claim 6
Dependent Claim
25 words
A composition according to claim 4 wherein component b) is derived from ethyleneimine and has an average molecular weight of about 25000 to about 430000.
Claim 7
Dependent Claim
23 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.
Claim 8
Dependent Claim
25 words
The composition according to claim 6 wherein destructurized starch is present in amounts of about 60 % to about 99 % of the total composition.
Claim 9
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 10
Dependent Claim
38 words
The composition according to anyone of the claims 1 to 8 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 11
Dependent Claim
39 words
The composition according to claim 9 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, substantially water-insoluble or crystallizable poly(alkylene oxides), and mixtures thereof.
Claim 12
Dependent Claim
29 words
The composition of claim 10 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 13
Dependent Claim
63 words
The composition according to claim 9 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 14
Dependent Claim
54 words
The composition according to claim 12 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 15
Dependent Claim
28 words
The composition according to claim 9 wherein the sum of components b) and c) constitute about 1 % to about 99 % by weight of the total composition.
Claim 16
Dependent Claim
42 words
The composition according to claim 14 wherein the sum of components b) and c) consitute about 10 % to about 80 % by weight of the total composition, preferably about 1 % to about 40 % by weight of the total composition.
Claim 17
Dependent Claim
47 words
The composition according to anyone of the claims 1 to 15 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 18
Dependent Claim
17 words
The composition according to anyone of the claims 1 to 16 further containing an agriculturally active compound.
Claim 19
Dependent Claim
16 words
The composition according to anyone of the claims 1 to 17 which is a melt blend.
Claim 20
Dependent Claim
12 words
The composition according to claim 18 which is a cooled solidified blend.
Claim 21
Dependent Claim
12 words
The composition according to claim 19 in particulate, granulated or pelletized form.
Claim 22
Dependent Claim
130 words
A thermoplastic destructurized-starch product made from a composition as claimed in anyone of the claims 1 to 17, 19 or 20 having substantial dimensional stability formed by the process comprising: 1) providing a mixture comprising starch at least one compound selected from the group consisting of at least one compound selected from the group consisting of polyalkyleneimine polymers and polyalkyleneimine copolymers; said modified polysaccharide being present in an amount effective to enhance the physical properties of said articles, 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 23
Dependent Claim
25 words
The product according to claim 21 wherein destructurization of the starch is carried out at a temperature above its melting point and glass transition temperature.
Claim 24
Dependent Claim
34 words
The product according to claim 21 or 22 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 25
Dependent Claim
38 words
The product according to claim 22 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 26
Dependent Claim
35 words
The product according to claim 24 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 27
Dependent Claim
20 words
The product according to anyone of the claims 22 to 25 which is a granulate, a pellet or a powder.
Claim 28
Dependent Claim
35 words
The product according to claim 26 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 29
Dependent Claim
30 words
The shaped articles according to claim 27 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 30
Dependent Claim
102 words
A thermoplastic destructurized-starch substantially homogenous melt made from a composition according to anyone of the claims 1 to 17, 19 or 20 formed by the process comprising: 1) providing a mixture comprising starch and at least one compound selected from the group consisting of at least one compound selected from the group consisting of polyalkyleneimine polymers and polyalkyleneimine copolymers; said modified polysaccharide being present in an amount effective to enhance the physical properties of said articles. 2) heating said mixture in a closed volume under sufficient temperature and pressure for a time long enough to destructurized said starch and form said melt.
Claim 31
Dependent Claim
33 words
The melt according to claim 29 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 32
Dependent Claim
38 words
The melt according to claim 29 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 33
Dependent Claim
35 words
The melt according to claim 31 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)
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