Microcellular polymer foams and method for their production

Details Microcellular polymer foams and method for their production Microcellular polymer foams and method for their production

C - Chemistry, Metallurgy

08

J

C08J 9/18 (2006.01) B29C 43/00 (2006.01) B29C 44/34 (2006.01)

Patent

CA 2359956

An environmentally friendly, commercially practicable process for the production of microcellular polymer foams from amorphous, semi-crystalline and crystalline polymers that comprises consolidating the polymer into a polymer shape, saturating the polymer shape with an inert gas at elevated temperature, above the Tg of the polymer, and under elevated pressure, releasing the pressure and cooling, i.e. quenching, the saturated polymer shape under controlled temperature and pressure conditions to produce either a closed or open celled, low to medium density microcellular foam or a closed cell, high density microcellular foam.

L'invention porte sur un procédé de production, respectueux de l'environnement et commercialement viable, de mousses micro-alvéolaires à partir de polymères amorphes, semi-cristallins et cristallins. Ce procédé consiste à forcer le polymère dans un moule, saturer le moule polymère avec un gaz inerte à température élevée, supérieure à la T¿g? du polymère, et sous pression élevée, relâcher la pression et refroidir, c.-à-d. tremper, le moule polymère contenant le polymère saturé dans des conditions de température et de pression contrôlées de façon à produire une mousse micro-alvéolaire à alvéoles fermées ou ouvertes, d'une densité faible à moyenne, ou une mousse micro-alvéolaire haute densité, à alvéoles fermées.

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