Starch/polymer mixture, process for the preparation thereof, and products obtainable therefrom
AssigneeEMS-Inventa AG
InventorsFriedrich S. Buehler, Eduard Schmid, Hans-Joachim Schultze
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Abstract
A biodegradable, single-phase starch/polymer mixture comprising (a) 10 to 99 parts of a starch molding composition comprising (i) 95 to 45 parts of at least one chemically modified starch, and (ii) 5 to 55 parts of at least one emulsifier, plasticizer or destructurizing agent, the parts of (i) and (ii) adding up to 100; and (b) 90 to 1 parts of at least one linear polymer, the parts by weight of components (a) and (b) adding up to 100. In addition, 0 to 20 parts of additives which are customary in this area are included. A method of preparation, and the use thereof for thermoplastically molded parts, in particular films, is also disclosed.
Claims27
A biodegradable, single-phase starch/polymer mixture comprising
- (a) 10 to 99 parts by weight of a starch molding composition comprising
- (i) 95 to 45 parts by weight of at least one chemically modified starch,
- (ii) 0.1 to 5 parts by weight of urea, urea derivatives, or mixtures thereof,
- (iii) 4.9 to 50 parts of at least one plasticizer, the parts of (i), (ii), and (iii) adding up to 100, and
- (b) 90 to 1 parts by weight of at least one linear polymer other than ethylene copolymers, the parts of components (a) and (b) adding up to 100.
Dependencies are inferred from the claim text.