Valtion Teknillinen Tutkimuskeskus

Jani Vuorenp{umlaut Over (aa)}

Pertti T&ouml;rm&auml;l&auml;

Soili Hellevi Peltonen

Harri Happonen

Pertti Tiitola

The invention concerns a hydroxypropyl starch ester (HPS ester), compositions containing it, and a process for the preparation thereof. According to the invention, the molar substitution in the HPS ester is 2 at the most and the substitution degree in the ester group is at least 1. The HPS ester is prepared by hydroxypropylating a starch-containing base material in an aqueous alkanol medium. A starch component can be prepared of the HPS ester containing 90 to 60% by weight HPS ester and 10 to 40% by weight of a plasticizer. Compositions which are suited for, e.g., coating board or paper and for use as a component in labelling adhesives or paint, can be made from the starch component by combining it with auxiliaries known as such within the polymer and plastics technology.

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Marcq-En-Baroeul, France

Jani Vuorenp{umlaut Over (aa)}