C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/14 (2006.01) C08J 9/228 (2006.01) C08L 25/06 (2006.01)
Patent
CA 2579337
A blowing agent blend for making thermoplastic polymer foams comprises methyl formate. The blowing agent blend can further comprise at least one co-blowing agent. The co-blowing agent is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The thermoplastic polymer foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend can comprise 100 mol% methyl formate, or it can comprise any combination of methyl formate and one or more co-blowing agents. The methyl formate-based blowing agent blends produce stable foams. A process for the preparation of such foams is also provided.
Mélange d'agent de soufflage permettant d'obtenir des mousses de polymère thermoplastiques comprenant un formate méthyle. Le mélange est susceptible de comprendre en outre au moins un agent de cosoufflage qui est soit un agent de cosoufflage physique (p.ex. un agent inorganique, un hydrocarbone, un hydrocarbone halogéné, un hydrocarbone à groupement(s) polaire(s) fonctionnel(s), de l'eau ou tout autre combinaison de ces éléments) soit un agent de cosoufflage chimique, ou leurs combinaisons. La mousse de polymère thermoplastique est une mousse de polymère aromatique alcényle, notamment une mousse de polystyrène. Le mélange d'agent de soufflage comprend 100 % en mole de formate de méthyle, ou une combinaison quelconque de formate de méthyle et d'un ou plusieurs agents de cosoufflage. Les mélanges d'agent de cosoufflage utilisant une formate de méthyle produisent des mousses stables. Procédé de préparation de telles mousses.
Francis Gary A.
Handa Yash Paul
Marks & Clerk
Pactiv Corporation
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