Bayer Aktiengesellschaft

Biotec Biologische Naturverpackungen & Co Kg

Ralf Timmermann

Ernst Grigat

Wolfgang Schulz-Schlitte

Hanns P Muller

Ralf Dujardin

Harald Schmidt

Aziz El Sayed

Winfried Pommeranz

Jurgen Loercks

Hermann Perrey

Christian Rasp

Rainhard Koch

Hans-Georg Rast

Bernhard Lehmann

Siegfried Kussi

Michael Voigt

Thermoplastic starch compositions formed by converting native starch or starch derivatives into thermoplastic starch by at least one hydrophobic biodegradable polymer that functions as a plasticizer for starch. The hydrophobic biodegradable polymer may be a polymer selected from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer and/or a polyglycol, and/or mixtures of these. When the starch, such as in particular native starch or derivatives thereof, is mixed in the melt with the hydrophobic biodegradable polymer as a plasticizer or swelling agent, to homogenize the mixture, the water content is reduced to less than about 5% by weight based on the weight of the mixture.

Thermoplastic starch utilizing a biodegradable polymer as melting aid

Polyether ester amides having high water vapor permeability are disclosed. The amides which are prepared simply and reliably, crystallize quickly, are biodegradable and/or compostable, and are suitable in the manufacture of films by extrusion.

Polyether ester amides

For converting native starch or starch derivatives into thermoplastic starch, added to the starch is at least one hydrophobic biodegradable polymer. This hydrophobic biodegradable polymer, which serves as a plasticizer or swelling agent, may be a polymer selected from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer and/or a polyglycol, and/or mixtures of these. When the starch, such as in particular native starch or derivatives thereof, is mixed in the melt with the hydrophobic biodegradable polymer as a plasticizer or swelling agent, to homogenize the mixture, the water content is reduced to <1% by weight based on the weight of the mixture.

Biodegradable polymeric mixtures based on thermoplastic starch

This invention relates to reinforced thermoplastic moulding compositions prepared from biodegradable polymers, for example aliphatic or polyester amides, aliphatic polyester urethanes, and to the use thereof for the production of mouldings and to the mouldings, wherein the reinforcing materials are selected from wood flour, fibres of natural origin, minerals of natural origin, cellulose and cellulose derivatives.

Biodegradable plastics filled with reinforcing materials

The invention relates to thermoplastically processible aliphatic polyesteramides which are biodegradable (compostable).

Thermoplastically processible and biodegradable aliphatic polyesteramides

The object of the present invention is the production of thermoplastically workable copolymers capable of being composted, characterized in that they consist of partially crystalline soft segments formed from aliphatic esters and also of amorphous hard segments and that the proportion of soft segments amounts to 70% to 95% by weight.

Thermoplastic block copolyesters capable of being composted for use as

The invention relates to a new three-part process, which can also be employed on a large industrial scale, for the preparation of polyurea lubricating greases, which is characterised

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Krefeld, Germany

Ralf Timmermann