Hydroxyalkylated starch ester and preparation and use thereof

Details Hydroxyalkylated starch ester and preparation and use thereof Hydroxyalkylated starch ester and preparation and use thereof

C - Chemistry, Metallurgy

08

B

C08B 31/16 (2006.01) C08B 31/02 (2006.01) C08L 3/04 (2006.01) C08L 3/06 (2006.01) C09D 103/04 (2006.01) C09J 103/04 (2006.01)

Patent

CA 2276329

The invention concerns a hydroxypropyl starch ester (HPS ester), composition 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 I. 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.

L'invention concerne un ester d'amidon hydroxypropylé (ester HPS), des compositions contenant cet ester et un procédé de production correspondant. Selon l'invention, la substitution molaire dans l'ester HPS est de 2 maximum et le degré de substitution dans le groupe ester est d'au moins de 1. L'ester HPS est produit par hydroxypropylation d'une matière de base contenant de l'amidon dans un milieu alcanol aqueux. Un constituant amidon peut être préparé avec de l'ester HPS contenant 90 à 60 % en poids d'ester HPS et 10 à 40 % en poids d'un plastifiant. Les compositions convenant par exemple comme revêtement pour du carton ou du papier et à une utilisation comme constituant dans des colles d'étiquetage ou peintures, peuvent être produites à partir du constituant amidon associé à des auxiliaires connus comme tels dans la technologie des polymères et des plastiques.

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