Process for the production of particles comprising polyarylene (ether) sulfone
AssigneeBASF SE
InventorsGeorg GRAESSEL, Uwe WITT, Giorgio GREENING, Filiz KAYIHAN
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Abstract
A process for the production of particles comprising polyarylene (ether) sulfone, comprising the agglomeration of fine-particle material comprising polyarylene (ether) sulfone, particles comprising polyarylene (ether) sulfone and a process for the recycling of a foam, of a foil or membrane, or of a molding, or of edge trim from the production of a coating, of a foam, of a foil or membrane, or of a molding comprising the production of comminuted material therefrom and the agglomeration to give recyclate particles.
Claims14
-13. (canceled)
A process for the production of particles comprising polyarylene (ether) sulfone, comprising the agglomeration of fine-particle material comprising polyarylene (ether) sulfone (educt), where
- (i) the moisture content of the educt, based on the total weight of the educt and determined on the basis of the moisture escaping from the starting material heated to 160° C., is not more than 2% by weight,
- (ii) the moisture content of the ambient air that is introduced from outside into the apparatus used for the agglomeration, determined with use of a hygrometer, is from 40 to 80%, and
- (iii) the temperature of the ambient air, determined at the point of introduction of the ambient air into the apparatus, is from 15 to 35° C.
A particle comprising polyarylene (ether) sulfone whose C* value is below 15 determined according to CieLab spin measurement and where at least 60% by weight of the particles have a particles size (d50 value) in the range from 2 mm to 3.5 mm determined from dynamic image analysis.
Dependencies are inferred from the claim text.