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US 8,263,690 B2Granted
Polylactic acid composition
AssigneesTeijin Limited, Musashino Chemical Laboratory, Ltd.
InventorsHirotaka Suzuki, Kiyotsuna Toyohara, Yuka Komazawa
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Abstract
It is an object of the present invention to provide a composition which contains polylactic acid and has excellent heat stability, mechanical strength and color. The composition contains 0.001 to 0.1 part by weight of a metal catalyst and 0.001 to 0.5 part by weight of a phosphono-fatty acid ester based on 100 parts by weight of polylactic acid.
Claims6
A composition which comprises:
- (i) 0.001 to 0.1 part by weight of a metal catalyst containing tin,
- (ii) 0.001 to 0.5 part by weight of a phosphono-fatty acid selected from the group consisting of ethyl di-n-hexylphosphono acetate and octadecyl diethylphosphono acetate
- and
- (iii) 100 parts by weight of polylactic acid.
1 more element
A process of manufacturing a composition which contains a stereocomplex crystal by mixing together poly-L-lactic acid and poly-D-lactic acid, wherein
- at least one of poly-L-lactic acid and poly-D-lactic acid contains a metal catalyst containing tin and the mixing is carried out in the presence of 0.001 to 0.5 part by weight of a phosphono-fatty acid ester selected from the group consisting of ethyl di-n-hexylphosphono acetate and octadecyl diethylphosphono acetate based on 100 parts by weight of the total of poly-L-lactic acid and poly-D-lactic acid.
Dependencies are inferred from the claim text.