Additives for foaming polymeric materials

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/00 (2006.01)

Patent

CA 2653199

A foaming additive and a catalyst additive may be used to foam polymeric materials having a low melt flow rate. The foaming additive may include a blowing agent and a hydrophilic component, and the catalyst additive may include a catalyst and a hydrophilic component. Since both the blowing agent and the catalyst are initially combined with a hydrophilic component, the blowing agent and the catalyst are able to find each other easier after being added to the polymeric materials. This makes it simple and economical to make low density foamed materials using polymeric materials having a low melt flow rate.

Selon la présente invention, un additif d'expansion et un additif de catalyseur peuvent être utilisés pour l'expansion de matériaux polymères ayant un faible indice de fluidité à l'état fondu. L'additif d'expansion peut comprendre un agent d'expansion et un composant hydrophile, et l'additif de catalyseur peut comprendre un catalyseur et un composant hydrophile. Étant donné que tant l'agent d'expansion que le catalyseur sont initialement combinés avec un composant hydrophile, l'agent d'expansion et le catalyseur peuvent se trouver plus facilement après avoir été ajoutés aux matériaux polymères. Ceci rend simple et économique la fabrication de matériaux expansés basse densité en utilisant des matériaux polymères ayant un faible indice de fluidité à l'état fondu.

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