The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 2021
Filed:
Jan. 11, 2019
Agrana Beteiligungs-aktiengesellschaft, Vienna, AT;
AGRANA BETEILIGUNGS-AKTIENGESELLSCHAFT, Vienna, AT;
Abstract
The invention relates to a method for producing thermoplastic starch, in which a mixture comprising starch and a polyol, preferably selected from the group comprising polyethylene glycol, monosaccharides, sugar alcohols such as glycerol, sorbitol, erythritol, xylitol or mannitol and mixtures thereof, in a quantity of between 10 and 25 wt. % of the mixture, and an epoxide selected from the group comprising epoxidised plant oils such as soybean oil, linseed oil, sunflower oil, rapeseed oil and mixtures thereof, in a quantity of between 0.1 and 6, preferably between 2.5 and 3.5 wt. % of the mixture, is extruded, the mixture also containing an acid, preferably a carboxylic acid selected from the group consisting of citric acid, malic acid or tartaric acid, in a quantity of between 0 and 1, preferably between 0.1 and 0.5 wt. % of the mixture. The invention also relates to such a produced thermoplastic starch, to a compound produced by means of the thermoplastic starch, and to a film produced from such a compound.