Thermoplasticized starch component and process for the preparation thereof

Jukka Seppälä (Inventor), Minna Malin (Inventor), Soili Peltonen (Inventor), Elina Heikkilä (Inventor), Jani Vuorenpää (Inventor)

    Research output: Patent


    PCT No. PCT/FI96/00402 Sec. 371 Date Jan. 12, 1998 Sec. 102(e) Date Jan. 12, 1998 PCT Filed Jul. 10, 1996 PCT Pub. No. WO97/03120 PCT Pub. Date Jan. 30, 1997The invention relates to a process for thermoplasticizing starch, a melt-processible polymer composition, which contains a starch-based component and a thermoplastisized polymer component, and a method for preparating such a composition. According to the invention the starch component, which contains hydroxyl groups capable of reacting with isocyanate groups, is modified so that it can be dissolved or gelatinized/plastisized in the melt of a hydroxy acid polymer. The starch component is then reacted with a thermoplastic component formed by a hydroxy acid polymer, in particular a lactic acid polymer, in order to produce a melt-processible, biologically degradable starch-based polymer, which can be used as an adhesive and for coating of paper and cardboard products and for preparation of injection moulded and thermoformed articles.

    Original languageEnglish
    Patent numberUS6011092
    IPCC08L 101/ 16 A I
    Priority date10/07/1996
    Publication statusPublished - 4 Jan 2000
    MoE publication typeH1 Granted patent


    • starch
    • thermoplastics

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