摘要：

Process for making a halogen-free water-based dispersions of biodegradable polymers having a long-term stability comprising i) providing a biodegradable polymer selected from poly(lactic-co- glycolic acid) (PLGA), poly(lactic acid) (PLA), poly(s-ca prolactone) (PCL), poly(butylene succinate) (PBS), poly(y-glutamic acid) (PGA), polyhydroxyalkanoate (PHA), or a copolymer or a mixture thereof, wherein at least 50% of said biodegradable polymer is in an amorphous state, ii) solubilizing it in a non-halogenated volatile organic solvent, which is at least partially immiscible in water, thus obtaining an oily phase, iii) preparing a water solution of a surfactant, and optionally a polysaccharide, iv) mixing both and homogenizing through ultrasound treatment at a temperature of 10-30°C, until an emulsion is achieved, and v) heating to evaporate the organic solvent. Also water-based dispersion of the biodegradable polymer having a particle size or lower than 600 nm and a dry matter content of at least 12wt% and its use as component of food-grade materials for food packaging.

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