Rubber and plastic particles with a sulfonated skin layer,...

Details Rubber and plastic particles with a sulfonated skin layer,... Rubber and plastic particles with a sulfonated skin layer,...

B - Operations, Transporting

09

B

B09B 3/00 (2006.01) C04B 16/10 (2006.01) C04B 18/20 (2006.01) C04B 18/24 (2006.01) C04B 24/24 (2006.01) C08J 7/12 (2006.01) C08J 11/04 (2006.01)

Patent

CA 2104344

ABSTRACT Rubber and plastic particles, to especially include as recovered from recycle streams, can be made to have a sulfonated outer layer by treatment with a reactant gas containing sulfur trioxide. A silo apparatus can be employed to make these sulfonated particles, wherein untreated particles fall through the silo which is provided with a reactant gas supply. The sulfonated particles may optionally be neutralized, for example, with moist ammonia. These sulfonated particles can be used in articles of manufacture such as aggregates in cements, organic resins, cellulosics, and so forth, with beneficial properties being imparted to the composite. When used in a Portland cement, for example, increased performance concrete can result.

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