EP0404727A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polymer base blend compositions containing destructurized starch
Assignee: Warner Lambert Co LLC
•
Filing: 1990-06-18
•
Granted: —
•
Expires: 2010-06-18
Abstract
Abstract A thermoplastic polymer composition comprising a) a destructurized starch, and b) at least one polymer which does not contain hydroxyl groups and is selected from the group consisting of polymers which contain at least two types of functional groups bound to the same molecule one type of these groups being carboxylate 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
- 👤 David John Dr. Lentz
- 👤 Jean-Pierre Dr. Sachetto
- 👤 Jakob Dr. Silbiger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 02:54
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02; C08L57/00; C08L57/06; C08L57/10
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
78 words
A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) a destructurized starch, and b) at least one polymer which does not contain hydroxyl groups and is selected from the group consisting of polymers which contain at least two types of functional groups bound to the same molecule one type of these groups being carboxylate groups said polymer being present in an amount effective to enhance the physical properties of said articles.
Claim 2
Dependent Claim
78 words
A composition of matter capable of being formed into articles having substantial dimensional stability comprising a) a destructurized starch, and b) at least one polymer which does not contain hydroxyl groups and is selected from the group consisting of polymers which contain at least two types of functional groups bound to the same molecule one type of these groups being carboxylate groups said polymer being present in an amount effective to enhance the physical properties of said articles.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein the polymer of component b) further contains alkoxy, carboxyalkyl, alkyl carboxy, halo and/or pyrrolidono groups.
Claim 4
Dependent Claim
61 words
A composition according to claim 1 wherein the component b) is a synthetic polymer as obtained by copolymerization of acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, with monomers selected from the group consisting of ethylene, vinyl chloride, vinyl esters, acrylic acid esters, acrylonitrile, methacrylic acid esters, maleic acid esters, acryl amide, vinylene carbonate, omega-octadecene, vinyl-butyl ether, vinyl pyrrolidone.
Claim 5
Dependent Claim
30 words
A composition according to claim 1 wherein the component b) is derived from acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, methylacrylate, methylmethacrylate, acrylamide, acrylonitrile and/or methylvinyl ether.
Claim 6
Dependent Claim
32 words
A composition according to anyone of the claims 1 to 5 wherein the amount of carboxyl and carboxylate containing moieties within the copolymer is from 5 mol % to 50 mol %.
Claim 7
Dependent Claim
33 words
A composition according to anyone of the claims 1 to 5 wherein the degree of neutralization of the carboxyl groups to form carboxylate groups is from about 30 % to about 100 %.
Claim 8
Dependent Claim
81 words
A composition according to claim 1 wherein component b) is selected from the group consisting of polyacrylic acid-co-vinyl- acetate; ethylene/acrylic acid/vinyl acetate copolymers; ethylene/vinyl chloride/acrylic acid/vinyl acetate graft copolymers; acylic acid/ vinyl acetate/ vinyl chloride copolymers; acrylic acid/vinyl methylether copolymers; vinyl acetate/ acrylic acid/ acrylic acid methylester copolymer; vinyl acetate/ crotonic acid copolymers; vinyl acetate/ maleic acid copolymers; methacrylic acid/ vinyl acetate/ vinyl pyrrolidone copolymers; ethylene/ acrylic acid/methylacrylate copolymer; acrylic acid/acrylonitrile copolymer; ethylene/ propylene /acrylic acid copolymer; styrene/ acrylic acid copolymer.
Claim 9
Dependent Claim
28 words
The composition according to anyone of the claims 1 to 7 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
44 words
The composition according to anyone of the claims 1 to 9 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 12
Dependent Claim
38 words
The composition according to anyone of the claims 1 to 10 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 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, polyhydroxybutyrate, high molar-mass substantially water-insoluble or crystallizable poly(alkylene oxides).
Claim 14
Dependent Claim
34 words
The composition of claim 12 wherein component c) is selected from the group consisting of polyethylenes, polypropylenes, polyisobutylenes, poly(vinyl chlorides), poly(vinyl acetate), polystyrene, polyamides, thermoplastic polyesters, thermoplastic polyurethanes, polycarbonates, poly(alkylene terephthalates) and mixtures thereof.
Claim 15
Dependent Claim
55 words
The composition according to claims 11 wherein component c) is selected from the group consisting of thermoplastic alkylene/vinyl ester-copolymers; ethylene/vinyl alcohol-copolymers; alkylene/acrylates or methacrylate copolymers; ABS-copolymers; styrene/acrylonitrile-copolymers; styrene-butadiene-copolymers, alkylene/maleic anhydride copolymer; 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 16
Dependent Claim
36 words
A composition according to claim 14 wherein component c) is selected from the group consisting of ethylene/vinyl acetate-copolymers, ethylene/vinyl alcohol-copolymers, ethylene/acrylic acid-copolymers, ethylene/ethyl acrylate-copolymers, ethylene/methacrylate-copolymers, styrene/acrylonitrile-copolymers; block copolymers of urethane-ethers, urethane-esters; as well as their mixtures.
Claim 17
Dependent Claim
51 words
The composition according to anyone of the claims 11 to 15 wherein the sum of components b) and c) constitute about 1 % to about 99 %, preferably about 20 % to about 80 % and most preferably about 1 % to about 30 % by weight of the total composition.
Claim 18
Dependent Claim
47 words
The composition according to anyone of the claims 1 to 16 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 19
Dependent Claim
12 words
The composition according to claim 17 further containing an agriculturally active compound.
Claim 20
Dependent Claim
16 words
The composition according to anyone of the claims 1 to 18 which is a melt blend.
Claim 21
Dependent Claim
12 words
The composition according to claim 19 which is a cooled solidified blend.
Claim 22
Dependent Claim
12 words
The composition according to claim 20 in particulate, granulated or pelletized form.
Claim 23
Dependent Claim
133 words
A thermoplastic destructurized-starch product made from a composition as claimed in anyone of the claims 1 to 18, 20 and 21 having substantial dimensional stability formed by the process comprising: 1) providing a mixture comprising starch and at least one polymer which does not contain hydroxyl groups and is selected from the group consisting of polymers which contain at least two types of functional groups bount to the same molecule one type of these groups being carboxylate groups (component b); and 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 24
Dependent Claim
25 words
The product according to claim 22 wherein destructurization of the starch is carried out at a temperature above its melting point and glass transition temperature.
Claim 25
Dependent Claim
33 words
The product according to claim 23 wherein the destructurization of the starch is carried out at temperatures of about 105°C to about 240°C, preferably at a temperature of about 130°C to about 190°C.
Claim 26
Dependent Claim
38 words
The product according to claim 23 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 27
Dependent Claim
35 words
The product according to claim 25 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 28
Dependent Claim
20 words
The product according to anyone of the claims 22 to 26 which is a granulate, a pellet or a powder.
Claim 29
Dependent Claim
35 words
The product according to claim 27 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 30
Dependent Claim
30 words
The shaped articles according to claim 28 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 31
Dependent Claim
131 words
A thermoplastic destructurized-starch substantially homogenous melt made from a composition as claimed in anyone of the claims 1 to 18, 20 and 21 formed by the process comprising: 1) providing a mixture comprising starch and at least one polymer which does not contain hydroxyl groups and is selected from the group consisting of polymers which contain at least two types of functional groups bount to the same molecule one type of these groups being carboxylate groups (component b); and 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 32
Dependent Claim
25 words
The melt according to claim 30 wherein destructurization of the starch is carried out at a temperature above its melting point and glass transition temperature.
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.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.