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AssigneeNEC Corporation
InventorsMidori Shimura, Kazuhiko Inoue
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Provided is a polylactic acid-based polyol composition in which a catalyst that remains in the polylactic acid-based polyol and that acts also as a catalyst for urethane formation has been deactivated by easy means. Thus, the polylactic acid-based polyol composition suffers from little influence of the catalyst on urethane formation. When the polylactic acid-based polyol composition is used as a raw material for a urethane resin, therefore, uniform molded products can be obtained. Also provided are a process for the production of the polylactic acid-based polyol composition, a urethane resin composition obtained using the polylactic acid-based polyol composition, a process for the production of the same, and molded products thereof. The polylactic acid-based polyol composition is a composition which comprises both a polylactic acid-based polyol prepared by transesterification and a silica compound and in which the silica compound has a surface area of 40 m2 or more based on 100 g of the polylactic acid-based polyol and a content of the silica compound is 70 wt % or less.
A polylactic acid-based polyol composition comprising a polylactic acid-based polyol obtained by transesterification, a silica compound and a soft polyol having glass transition temperature (Tg) of less than 30° C., wherein the silica compound has a surface area of 40 m2 or more based on 100 g of said polylactic acid-based polyol, and a content of the silica compound is 70 wt % or less.
A process for the production of a polylactic acid-based polyol composition comprising adding a silica compound and a soft polyol having glass transition temperature (Tg) of less than 30° C. to a crude polylactic acid-based polyol which is obtained by transesterilication between a polylactic acid-based compound synthesized by using a catalyst and a polyol, wherein the silica compound has a surface area of 40m2 or more based on 100 g of said crude polylactic acid-based polyol, and a content of the silica compound is 70 wt% or less.
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