Patent ID: 6774161
Filing Date: 2004-08-10
Classification: C08J

Abstract:
A process for the cold molding of particulate materials employing a binder, comprising preheating the binder and said particulate material to be bound to a temperature of from 160 to 240Â° C., followed by press molding at a temperature less than 80Â° C. and at a pressure of from 1 to 120 bar to produce a molding, wherein said binder comprises a polymer powder or an aqueous polymer dispersion thereof, the glass transition temperature Tg of the polymer being greater than 80Â° C. and the complex viscosity of the polymer being less than 15,000 PaÂ·s at 190Â° C., said polymer containing one or more comonomer units selected from the group consisting of vinyl esters of optionally branched C1-18 alkylcarboxylic acids, (meth)acrylic esters of optionally branched C1-15 alcohols, dienes, olefins, vinylaromatics, and vinyl halides.