Polymer material and method for the production thereof
AssigneeBiotec Biologische Naturverpackungen GmbH & Co. KG
InventorsHarald Schmidt, Christoph Hess, Johannes Mathar, Ralf Hackfort
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Abstract
A thermoplastic polymer material containing starch is shown and described, which can be obtained by homogenizing a mixture containing 40 to 85 wt.-% starch and/or starch derivative, 15 to 55 wt.-% softener, and 0.01 to 7 wt.-% of a polymer which contains an epoxy group, while supplying thermal and/or mechanical energy and setting the water content of the mixture to less than approximately 12 wt.-%. The polymer material according to the invention is characterized by outstanding mechanical properties.
Claims51
Polymer material which is obtainable by a process comprising:
- homogenizing a mixture comprised of:
- 40 to 85 wt. % of starch and/or starch derivative, 15 to 55 wt. % of plasticizer;
- and
- 0.01 to 7 wt. % of an epoxide group-containing polymer,
- said homogenizing being performed by supplying thermal and/or mechanical energy to the mixture and setting the water content of the mixture to less than approximately 7 wt. %.
(canceled)
Method for producing a polymer material comprising:
- (a) producing a mixture comprised of:
- 40 to 85 wt. % of starch and/or starch derivative;
- 15 to 55% wt. of plasticizer;
- and
- 0.01 to 7% wt. of an epoxide group-containing polymer,
- (b) homogenizing the mixture by supplying thermal and/or mechanical energy;
- and
- (c) setting the water content of the mixture to less than approximately 7% wt.
Dependencies are inferred from the claim text.