Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
2007-07-31
2007-07-31
Wyrozebski, Katarzyna (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C521S041500
Reexamination Certificate
active
10796531
ABSTRACT:
A process for reclaiming sulfur-cured, vulcanized rubber by combining finely ground scrap vulcanized rubber within a specialized, twin-screw extruder capable of providing strong shearing and just-on-time mixing; adding a reclaiming agent to the extruder; and masticating the rubber scrap and reclaiming agent within the extruder until the rubber scrap is devulcanized. The present invention also discloses a unique composition of reclaiming agent, which preferably includes the following compounds: accelerators TBBS, ZMBT, MBT, and TMTM; activators zinc oxide and stearic acid; and zinc salts of fatty acids and sulfur. The reclaimed rubber is suitable for use in producing high-grade, rubber products without adding a binder, or for combining with fresh rubber compounds to produce high-specification rubber products.
REFERENCES:
patent: 4211676 (1980-07-01), Watabe et al.
patent: 4481335 (1984-11-01), Stark, Jr.
patent: 5602186 (1997-02-01), Myers et al.
patent: 5770632 (1998-06-01), Sekhar et al.
patent: 5891926 (1999-04-01), Hunt et al.
patent: 6062283 (2000-05-01), Watanabe et al.
patent: 6387966 (2002-05-01), Goldshtein et al.
patent: 6590042 (2003-07-01), Tang
patent: 6632918 (2003-10-01), Matsushita et al.
patent: 6924319 (2005-08-01), Alsdorf et al.
Kenzo Fukumori and Mitsumasa Matsushita; “Material Recycling Technology of Crosslinked Rubber Waste”; R&D Review of Toyota CRDL, vol. 38, No. 1; 2003; pp. 39-47.
American Rubber Technologies, Inc.
Wyrozebski Katarzyna
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