EP0327505A2
Expired / Lapsed
EP
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Polymeric materials made from destructurized starch and at least one synthetic thermoplastic polymeric material
Assignee: Novamont SpA
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Filing: 1989-01-30
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Granted: —
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Expires: 2009-01-30
Abstract
Abstract A blended polymeric material as obtained from a melt comprising a water-containing destructurized starch and at least one essentially water-insoluble synthetic thermoplastic polymer.
Inventors
- 👤 Gustav Lay
- 👤 Johannes Rehm
- 👤 Robert Frederick Thomas Stepto
- 👤 Markus Thoma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 07:38
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; C; C08; C08L; C08L3/00; C08L3/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
23 words
A blended polymeric material as obtained from a melt comprising a water-containing destructurized starch and at least one essentially water-insoluble synthetic thermoplastic polymer.
Claim 2
Dependent Claim
23 words
A blended polymeric material as obtained from a melt comprising a water-containing destructurized starch and at least one essentially water-insoluble synthetic thermoplastic polymer.
Claim 3
Dependent Claim
44 words
A polymeric material according to claim 1, wherein the thermoplastic polymer is selected from the group consisting of polyolefines, vinylpolymers, polyacetals (POM); polycondensates, thermoplastic polyesters, polycarbonates, poly(alkylene therephthalates); polyarylethers; thermoplastic polymides; polyhydroxybutyrate (PHB) and high molecular weight essentially water-insoluble polyalkylene oxides or copolymers thereof.
Claim 4
Dependent Claim
53 words
A polymeric material according to claim 2, wherein the thermoplastic polymer is selected from the group consisting of polyethylene (PE), polyisobutylenes, polypropylenes, poly(vinyl chloride) (PVC), poly(vinyl acetates), polystyrenes, polyacrylonitriles (PAN), polyvinylcarbazols (PVK), polyamides (PA), essentially water-insoluble poly(acrylic acid esters) and essentially water-insoluble poly(methacrylic acid esters), as well as their copolymers and their mixtures.
Claim 5
Dependent Claim
40 words
A polymeric material according to claim 2, wherein the thermoplastic polymer 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/methyl acrylate-copolymers (EMA), ABS-copolymers, styrene/acrylonitrile-copolymers (SAN), polyacetals and their mixtures.
Claim 6
Dependent Claim
57 words
A polymeric material according to anyone of the claims 1 to 4, wherein the ratio of the water-containing destructurized starch to synthetic polymer is 0.1:99.9 to 99.9:0.1, preferably wherein the water-containing starch is present in an amount of at least 50% and more preferably in the range of 70 to 99% by weight of the entire composition.
Claim 7
Dependent Claim
45 words
A polymeric material according to anyone of the claims 1 to 4, wherein the ratio of the synthetic polymer to the starch/water component is 0.5 - 5% to 99.5 - 95% by weight and preferably from 0.5% - 2% to 99.5% - 98% by weight.
Claim 8
Dependent Claim
94 words
A polymeric material according to anyone of the claims 1 to 6, wherein said starch is selected from chemically essentially non-modified starch being carbohydrates of natural, vegetable origin composed mainly of amylose and/or amylopectin, preferably potatoes, rice, tapioca, corn, rye, oats, wheat; physically modified starch; starch with a modified acid value (pH); starch, in which the divalent ions bridging the phosphate groups have been eliminated from this bridging function and optionally wherein the eliminated ions have been replaced again partially or wholly by the same or different mono- or polyvalent ions, and/or pre-extruded starches.
Claim 9
Dependent Claim
57 words
A polymeric material according to anyone of the claims 1 to 7, wherein said starch mixed with at least one synthetic polymer was heated for destructurization in a closed volume for a time long enough to effect destructurization to a temperature within the range of about 105°C to 190°C, preferably within the range of 130°C to 190°C.
Claim 10
Dependent Claim
46 words
A polymeric material according to anyone of the claims 1 to 8, wherein for destructurization pressure was applied in the range of from zero to 150 x 10⁵ N/m², preferably from zero to 75 x 10⁵ N/m² and particularly from zero to 50 x 10⁵ N/m².
Claim 11
Dependent Claim
52 words
A polymeric material according to anyone of the claims 1 to 9, wherein the starch has a water content in the range of about 10 to 20% by weight of the starch/water component, preferably 12% to 19% and especially 14% to 18% by weight, calculated to the weight of the starch/water component.
Claim 12
Dependent Claim
25 words
A polymeric material according to anyone of the claims 1 to 10, wherein the starch/synthetic polymer mixture contains extenders, fillers, lubricants, plasticizers and/or coloring agents.
Claim 13
Dependent Claim
44 words
A polymeric material according to claim 11, characterized in that there is added at least one extender or a mixture or extenders within the range of up to 50%, preferably within the range of 3% to 10%, based on the weight of all components.
Claim 14
Dependent Claim
43 words
A polymeric material according to claims 11 or 12, characterized in that there is added at least one organic filler or a mixture of such fillers in a concentration of about 0.02 to 3%, preferably 0.02 to 1%, by weight of all components.
Claim 15
Dependent Claim
35 words
A polymeric material according to anyone of the claims 11 to 13, wherein there is added a plasticizer within the range of about 0.5 to 15%, preferably 0.5 to 5% by weight of all components.
Claim 16
Dependent Claim
35 words
A polymeric material according to anyone of the claims 11 to 14, wherein a coloring agent is added in a concentration of about 0.001 to 10%, preferably 0.5 to 3% by weight of all components.
Claim 17
Dependent Claim
41 words
A polymeric material according to anyone of the claims 11 to 15, wherein a plasticizer is added and the sum of the plasticizer and water contents does not exceed 25%, and preferably does not exceed 20% by weight of all components.
Claim 18
Dependent Claim
29 words
A polymeric material according to anyone of the claims 1 to 16, wherein the blended starch contains at least one active ingredient selected from pharmaceuticals and/or agriculturally active compounds.
Claim 19
Dependent Claim
19 words
The polymeric material in the form of a melt obtained according to anyone of the claims 1 to 17.
Claim 20
Dependent Claim
15 words
The solidified destructurized blended starch obtained by cooling the material obtained according to claim 18.
Claim 21
Independent Claim
90 words
A method of producing a polymeric material as claimed in anyone of the claims 1 to 18 comprising a modified destructurized starch and an essentially water-insoluble synthetic thermoplastic polymer by heating a starch having a water content of 5 to 30% by weight based on the starch/water component in a closed volume to elevated temperatures thereby at elevated pressures for a time long enough to form a melt, characterized in that said starch/water material is mixed with at least one essentially water-insoluble synthetic thermoplastic polymer before or during melting formation.
Claim 22
Dependent Claim
35 words
The use of modified starch/synthetic polymer mixture compositions obtained as claimed in anyone of the claims 1 to 19 as carrier material for active ingredients, preferably as carrier materials for pharmaceuticals, and/or agriculturally active substances.
Claim 23
Dependent Claim
59 words
The process of shaping a destructurized starch/synthetic polymer mixture composition as obtained according to anyone of the claims 1 to 18, under controlled water content and pressure conditions as a thermoplastic melt wherein said shaping process is at least one member selected from the class consisting of injection molding, blow molding, extrusion and coextrusion, compression molding or vacuum forming.
Claim 24
Dependent Claim
16 words
Shaped articles produced from a composition as claimed in anyone of the claims 1 to 18.
Claim 25
Dependent Claim
28 words
The articles of claim 23, wherein said articles have been shaped as bottles, sheets, films, packaging materials, pipes, rods, laminates, sacks, bags or pharmaceutical capsules, granules or powders.
References Cited (Backward Citations)
No citation records indexed.
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