C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/14 (2006.01) C08J 9/00 (2006.01) C08J 9/12 (2006.01)
Patent
CA 2381559
This invention provides an insulating extruded thermoplastic polymer closed- cell foam having a thermal conductivity according to EN-13164 of about 35 mW/m.°K or less. The polymer is a monovinyl aromatic polymer with a broad molecular weight distribution. The foam contains blowing agent residuals from production of freshly formed cells of the foam using a blowing agent mixture that includes a primary blowing agent (one or more fluorine-containing carbon compounds and, optionally, carbon dioxide) and a secondary blowing agent (C1-4 alcohol, a C1-5 linear or cyclic hydrocarbon, an alkyl halide, water or a mixture thereof).
L'invention concerne une mousse de polymère thermoplastique isolante, extrudée, à alvéoles fermées, à conductivité thermique d'environ 35mW/m. ·K ou moins, conformément à la norme EN-13164. Ce polymère est un polymère aromatique monovinylique à large distribution de poids moléculaire. La mousse contient des résidus d'agent gonflant provenant de la production de cellules de mousse fraîchement formées à l'aide d'un mélange d'agent gonflant, comprenant un agent gonflant primaire (au moins un composé de carbone contenant du fluor, et éventuellement du dioxyde de carbone), et un agent gonflant secondaire (alcool C¿1-4?, hydrocarbure C¿1-5? linéaire ou cyclique, halide d'alkyle, eau, ou mélange de ceux-ci).
Duffy John D.
Mason Jeffrey J.
Paquet Andrew N.
Vo Chau V.
Dow Global Technologies Inc.
Smart & Biggar
The Dow Chemical Company
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