C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/04 (2006.01) B29C 35/04 (2006.01) B29C 44/08 (2006.01) B29C 44/34 (2006.01) C08L 33/24 (2006.01)
Patent
CA 2471281
The invention relates to an improved method for producing foamed material, especially poly(meth)acrylimide foams, which are foamed from polymer plates produced according to the casting method. The two-step method consists of a pre-heating step and at least one foaming step. The product obtained has a significantly smaller compressive strain, measured according to DIN 53425(ASMD 621), than prior art products.
L'invention concerne un procédé amélioré permettant de produire des mousses synthétiques, notamment des mousses synthétiques en poly(méth)acrylimide, qui sont moussées à partir de plaques de polymérisat produites selon le procédé de coulage. Le procédé en deux étapes comprend une étape de préchauffage et une ou plusieurs étapes de moussage. Les produits obtenus présentent un niveau de compression nettement inférieur, selon la norme DIN 53425 (ASMD 621), à celui des produits de l'état de la technique.
Geyer Werner
Heberer Wilfried
Maier Leonard
Seibert Hermann
Stein Peter
Evonik Roehm Gmbh
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Roehm Gmbh & Co. Kg
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