Resin composition and molded article

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/00 (2006.01) B29C 55/02 (2006.01) B65D 65/46 (2006.01) C08J 5/18 (2006.01) C08L 101/16 (2006.01)

Patent

CA 2667183

Disclosed is a resin composition containing a biodegradable resin (A), a polyolefin resin (B) and a dispersing agent (C). The resin composition has a sea-island structure wherein the biodegradable resin (A) is dispersed like islands in the polyolefin resin (B) as the sea component, and the biodegradable resin (A) has an average dispersed particle diameter of not less than 1 nm but not more than 1000 nm. This resin composition contains a biodegradable resin such as a polylactic acid which places only a little burden on the environment, and enables to obtain a molded article having moisture-proofing properties and dimensional stability equal to or higher than those of conventional polyolefin molded articles, while maintaining the productivity of the conventional polyolefin molded articles.

L'invention concerne une composition de résine contenant une résine biodégradable (A), une résine de polyoléfine (B) et un agent dispersant (C). La composition de résine a une structure mer-île dans laquelle la résine biodégradable (A) est dispersée comme des îles dans la résine de polyoléfine (B) en tant que composant mer, et la résine biodégradable (A) a un diamètre moyen de particule dispersée non inférieur à 1 nm mais non supérieur à 1 000 nm. Cette composition de résine contient une résine biodégradable, telle qu'un acide polylactique, peu nocive pour l'environnement, et permet d'obtenir un article moulé ayant des propriétés hydrofuges et une stabilité dimensionnelle égale ou supérieure à celle d'articles moulés classiques en polyoléfine, tout en maintenant la productivité de ces articles.

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