Patent ID: 6713534
Filing Date: 2004-03-30
Classification: C08J,C08K

Abstract:
A process for preparing a fine-particle rubber powder, comprising:a) suspending 1) one or more silicatic fillers and one or more bifunctional organosilicon compounds or 2) a silicatic filler modified with an organosilicon compound in water, thereby obtaining an aqueous suspension; b) adjusting a pH of the aqueous suspension to 5 to 10; c) adding a solution of one or more rubbers in an organic solvent to the aqueous suspension; d) removing the organic solvent, thereby obtaining rubber powder in water; e) removing most of the water from the rubber powder; and f) adjusting a residual moisture level of the rubber powder to &lE;2%, thereby obtaining said fine particle rubber powder; wherein said rubbers are prepared by solution polymerization and/or from rubber present in the organic solvent.