B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/00 (2006.01) B01J 20/26 (2006.01) B01J 20/30 (2006.01)
Patent
CA 2599633
The invention relates to a method for producing polymer blends, which are suited for use as filter aids, from polystyrene and cross-linked water- insoluble polyvinyl pyrrolidones by processing both components in an extruder. The invention is characterized in that polystyrene is melted in an extruder, is then mixed with the polyvinyl pyrrolidone, and water is added to the mixture of the components having 0.1 to 10 % by weight with regard to the total amount of polystyrene and popcorn polymer, whereupon the mixture is extruded and comminuted.
L'invention concerne un procédé de fabrication de mélanges polymères servant d'auxiliaires de filtrage, composés de polystyrol et de polyvinylpyrrolidones insolubles dans l'eau, à réticulation transversale, par traitement des deux composants dans une extrudeuse. Ledit procédé est caractérisé en ce que le polystyrol est fondu dans une extrudeuse puis mis en réaction avec le polyvinylpyrrolidone, et le mélange desdits composants est additionné de 0,1 à 10 % en poids d'eau, par rapport au poids total de polystyrol et de polymères popcorn, et extrudé et broyé.
Kerber Michael
Mathauer Klemens
Mueller Frank
Petsch Tobias
Pierobon Marianna
Basf Aktiengesellschaft
Robic
LandOfFree
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