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Invention relates to an elastomeric composition with a biodegradability degree below 50%, preferably below 30%, which comprises at least 0.5% and at most 99.95 wt % acetate of a starchy material, having a degree of substitution (DS) between 2.5 and 3 and, at least, 0.05 wt % and at most 99.5 wt % of a polymer other than starch, where the polymer is selected from a group comprising natural rubber and its derivatives, polyisobutylenes, polyisoprenes, styrene-butadiene copolymers (SBR), butadiene-acrylonitrile copolymers, hydrogenated butadiene-acrylonitrile copolymers, acrylonitrile-styrene-acrylate copolymers (ASA), ethylene-methyl acrylate copolymers (EAM), thermoplastic polyurethanes (TPU) in the form of simple ethers or in the form of a compound ether-simple ether, polyethylene or polypropylene, functionalised with halogenated silane, units of acrylic or maleic anhydride, ethylene-diene monomer rubber (EDM) and ethylene-propylene-diene monomer rubber (EPDM), thermoplastic elastomers, derived from polyolefines (TPO), styrene-butylene-styrene copolymers (SBS) and styrene-ethylene-butylene-styrene copolymers (SEBS), functionalised with units of maleic anhydride, and other blends of the above polymers. The composition may be used as a masterbatch or a matrix of the masterbatch, a plastic raw material, a compound for plastic or elastomeric articles, an adhesive, especially of a hot-melt type, or a matrix for the formulation of an adhesive, in particular of a hot-melt type, as a gum base or a matrix of the gum base, in particular for chewing gum, resin, co-resin or nanofiller for rubber, elastomers, bitumens, printing ink, varnish, paint, paper and cardboard, woven and non-woven products or thermosetting resins. It may also be used for the production of parts of equipment for the transport industry, in particular the automotive, aeronautical, railroad or ship building industry, for the electrical appliance, electronic appliance or electrical household appliance industries or for the sports and leisure industry. |
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Oxo-decomposing additive for polyolefins Oxo-decomposing additive for polyolefins includes metal carboxylates or mixtures of metal carboxylates deposited on an inert support; the metal carboxylates used are, for example, 2-ethylhexanoates of zinc or zirconium. The inert support used can be calcium carbonate. |
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Biodegradable thermoplastic composition based on cellulose diacetate Invention relates to a biodegradable thermoplastic composition, applied in the production of films and various thermally moulded products in the form of consumer containers. The composition contains cellulose diacetate, filler, represented by the bone tissue, a non-ionogenic surface-active substance - syntanol and a cationic surface-active substance - quaternary ammonium compounds as technological additives. |
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Biodegradable highly filled thermoplastic composition using starch and nanomodifier Invention relates to a biodegradable highly filled thermoplastic composition used in making films and consumer packaging. The composition contains polyethylene, biodegradable filler in form of potato starch, process additives: oligoepoxy ether with molecular weight of 1800-3500 and content of epoxy groups of 2.0-4.0% in nano-form and nonionic and cationic surfactants. |
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Lactic acid polymer composition and article moulded from said composition Present invention relates to a composition for moulding articles and a method of producing said composition. The composition contains 100 pts.wt of a polymer component A, which consists of 5-100 wt % of a lactic acid polymer (component A-α) and 95-0 wt % of thermoplastic resin (component A-β), 0.001-5 of pts.wt of a phosphoric-fatty acid ester (component B), 0.01-5 pts.wt of metal phosphate salt (component C), 0.001-2 pts.wt of at least one antioxidant (component D), 0.001-10 pts.wt of a chain end closing agent (component E) and 0.01-0.3 pts.wt of hydrotalcite. The antioxidant is selected from a group comprising a phosphite-based compound, phosphonite-based compounds, a hindered phenol-based compound and a thioether-based compound. The method of producing the composition involves mixing, at 250-300°C, composition-1, which contains poly-1-lactic acid and a phosphoric-fatty acid ester, and composition-2, which contains poly-d-lactic acid and a phosphoric-fatty acid ester, in the presence of a metal phosphate salt to obtain a stereo-complex lactic acid polymer. Further, component A, which consists of the obtained stereo-complex polymer and a thermoplastic resin, is mixed with the antioxidant and the chain end closing agent. |
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Polymer composition contains a mixture of (i) a polymer selected from polyethylene, polypropylene, polystyrene, polyvinyl chloride or a mixture thereof (ii) cellulose, (iii) ammonium nitrate, (iv) nutrients selected from blue-green algae and/or yeast, and (v) water. This composition can be mixed with a pure base polymer to obtain a polymer master batch. The master batch of the composition can be mixed with a pure base polymer which is suitable for obtaining products which are biodegradable. Described also is a method of preparing a biodegradable polymer composition, a method of preparing a master batch of the biodegradable polymer composition. |
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Biodegradable multiphase starch-based compositions Invention relates to biodegradable multiphase 5 compositions for making articles, which are characterised by that they contain three phases: (a) a continuous phase consisting of a matrix of at least one elastic hydrophobic polymer which is incompatible with starch; (b) a dispersed starch phase in form of nanoparticles with average size of less than 0.3 mcm, (c) an additional dispersed phase of at least one non-elastic and brittle polymer with 10 modulus of elasticity higher than 1000 MPa. |
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Biocompatible, biodegradable porous composite material and method of producing said material Biocompatible, biodegradable porous composite material contains chitosan and hydrosilicate filler in amount of 0.05-10% of the weight of chitosan and has a system of through pores with size of 5-1000 mcm. The method of producing the material involves mixing hydrosilicate filler, which is pre-dispersed in an aqueous medium with pH=5-7 in an ultrasonic field with frequency v=20-100 kHz for 5-60 minutes, with chitosan in an amount which corresponds to its concentration in the solution of 1-4 wt %, the amount of the filler being equal to 0.05-10% of the weight of chitosan; the obtained mixture is then intensely mixed at temperature of 20-50°C for 20-60 minutes; concentrated acetic acid is added in an amount which enables to obtain, in the mixture of the aqueous solution, acetic acid with concentration of 1-3%; the mixture is intensely mixed at temperature of 20-50°C for 20-250 minutes and then cooled to temperature of -5 to -196°C; the solvent is removed in a vacuum; the obtained end material is treated with a neutralising agent, washed with water to pH=5-7 and then dried. |
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Medical instrument, medical material and method for making medical instrument and medical material Medical material is processed by ionising radiation at radiation dose 5 to 100 kGy and contains a biodegradable resin and a polycarbodiimide compound in the amount of 0.1 to 10 wt % of resin. Biodegradable resin contains at least one resin specified in a group consisting of polybutylene succinate, and a polybutylene succinate copolymer, and polylactic acid or poly(3-hydroxyalkanoate) in the amount of 0 to 50 wt % of said polybutylene succinate resin. Group of inventions refers to a sterilised medical instrument made of said material, and to methods for making the medical material and the medical instrument which involve formation of said material and its processing by ionising radiation at radiation dose 5 to 100 kGy. |
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Bicomponent fibers, textile sheets and their use Bicomponent fibers contain aliphatic polyester or a mixture of aliphatic polyesters, which form the first component, and polyolefin or a mixture of polyolefins, which form the second component. Polyolefin contains auxiliary material improving its biodegradation. Textile sheets include these bicomponent fibers and are comparable by mechanical properties to textile sheets based on polyolefin, while they are decomposed more efficiently under the action of microorganisms than the textile sheets based on polyolefin. |
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Pectin- and chitosan-based biodegradable film Biodegradable film contains pectin, chitosan, water, 1N hydrochloric acid, a plasticiser - glycerine and a structure-forming agent - 3% methyl cellulose solution. |
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Polymer composition for moulding biodegradable articles from molten mass Invention relates to chemical and food industry, particularly to production of biodegradable plastic materials and can be used to make moulded or film articles for various purposes, including food purposes. The polymer composition for moulding biodegradable articles from molten mass contains polyolefins, biodegradable filler - starch and a process additive, which is a protein phosphatide concentrate (or fuzz) - a by-product of production of unrefined sunflower or rapeseed oil. |
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Polymer decomposition initiating universal additive and method of producing said additive Invention relates to chemical and food industry, particularly to production of biodegradable plastic materials and can be used to make moulded or film articles for various purposes, including food purposes. In the method of producing a universal additive which initiates polymer decomposition, exclusively consisting of natural material which includes a matrix, natural polysaccharides, binder, a heat stabiliser and a culture medium, involving mixing said components in a heated mixer at temperature 40-70°C and further granulation or pelletisation of the obtained mixture, the novelty lies in that the matrix contained in the additive is edible paraffin (food additive E905), oxidised polyethylene wax (food additive E914), the natural polysaccharide is starch, the binder is collagen-containing products (gelatin, belkozin, hide glue etc), the heat stabiliser is modified starch THERMTEX and the culture medium is phospholipids. |
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Method of producing biodegradable compositions involves treating granules of a hydrophobic polymer with a finishing agent - oleic acid, which is added in batches and adding filler to the hydrophobic polymer, said filler being modified starch THERMTEX, the molecule of which simultaneously contains fragments of ether and ester groups based on phosphoric acid with a different degree of protection. The mixture is thoroughly mixed and extruded at temperature 190-200°C. The invention also relates to a method of producing biodegradable compositions, involving mixing a powdered hydrophobic polymer with filler in form of modified starch THERMTEX, the molecule of which simultaneously contains fragments of ether and ester groups based on phosphoric acid with a different degree of protection. The mixture is thoroughly mixed and extruded at temperature 190-200°C. |
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Method of preparing biodecomposable compositions based on cellulose ether Invention relates to a method of preparing compositions which are subject to biodecomposition based on methylcellulose, which can be used for cosmetic and medical purposes. The composition contains methylcelluose, a reagent for modifying rheological characteristics, a hygroscopic reagent and an antibacterial agent. The reagent for modifying rheological characteristics is selected from gelatine or casein. The hygroscopic reagent is selected from glycerine or polyethylene glycol. The antibacterial agent is silver nitrate. The composition also contains a plasticiser. The composition is prepared by mixing a colloidal gel of methylcellulose with the reagent for modifying rheological characteristics, the hygroscopic reagent and the antibacterial agent. |
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Sulphur-cured rubber particle surface activation and/or devulcanisation process Destruction of sulphur bridges and recovery of sulphur is ensured by bioprocessing of rubber particles in a medium containing mesophilous, anaerobic and/or mesophilous, optionally anaerobic and/or mesophilous microaerophilic bacteria and/or one or more enzyme system of the specified bacteria in environment appropriate for the specified bacteria living. |
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Biodegradable granular polyolefin blend and method of production Biodegradable granular polyolefin blend represents antimisting granules sized 2-8 mm of apparent bulk density 530-630 kg/m3, granule density less than 920-1300 kg/m3. Herewith melt flow index (MFI) of the parent polyolefin is MFI=2.5-25.0 g/10 minutes. Processing and relevant aid concentrate contains at least one biodegradable additive, thermostabilisers, antioxidants, lubricants, antistatic aids, pigments, fillers etc. The granular polymer blend is produced within a number of stages to ensure uniform distribution of all the aids in polyolefin. Four powder material flows are used. Three aid compositions are mixed with three parts of parent powder polyolefin in ratio 1:4, 1:3 and 1:2 respectively. Prepared concentrate mother stocks are supplied to the fourth combined mixer with residual part of polyolefin. If required, necessary liquid biodegradable additive. The blend is stirred and homogenised at 150-250°C. |
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Method of obtaining porous polymer biodegradable products for osteanagenesis Effect is achieved by using compositions based on different stereoregular amorphous biodegradable polymers - polylactides and copolymers of lactides with glycolides (18-72 mass ratio) as the second component of biocompatible mineral filler - hydroxyapatite with particle size of the main fraction of 1-12 mcm (8-41 mass ratio), as well as an organic solvent with boiling temperature equal to or higher than softening temperature by 3-20°C (20-41 mass ratio). After preparation of a homogenous mixture, the composition is undergoes thermal treatment at 80-130°C in a vacuum in a shaping vessel with the required shape. A porous product is obtained due to removal of solvent. Density of the obtained porous product is about 0.4-0.8 g/cm3. |
Another patent 2551213.