Tate & Lyle Public Limited Company

Nils Dan Anders Södergard

Erik Mikael Stolt

Heikki Kalervo Siistonen

Geoffrey Ar Nobes

A blend of a multiply branched lactic acid polymer of one steric configuration with a linear lactic acid polymer of the opposite steric configuration has different and more useful properties than either component alone.

Lactic acid polymers

Poly(lactic acid) blends having a relatively high heat distortion temperature can be prepared by simple blending of PLA polymers of opposite stereoforms, followed by processing, e.g. by injection molding, under specific conditions of temperature and pressure, so as to produce a blend which, on differential scanning calorimetry, exhibits two peaks within the melting range of the stereocomplex. Moreover, by careful selection of these conditions of temperature and pressure, it is possible to use PLA polymers of significantly higher molecular weights than previously thought possible.

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Turku, Finland

Nils Dan Anders Södergard