Compositions – Dust suppressants for bulk materials – or processes of...
Reexamination Certificate
2011-01-18
2011-01-18
Ogden, Jr., Necholus (Department: 1796)
Compositions
Dust suppressants for bulk materials, or processes of...
C252S088200
Reexamination Certificate
active
07871534
ABSTRACT:
A method for dusting-preventive treatment of a dusting material using a dust-preventive treatment agent including a PTFE aqueous dispersion having lower potential for environmental concerns, which method is as effective as a known method and further has a lower possibility of environmental concerns, and the dust-preventive treated material obtained by treating the dusting material by the method. The method involves mixing a dust preventing treatment composition composed of an aqueous dispersion of polytetrafluoroethylene containing 50 ppm or less of a fluorine-containing emulsifier with the dusting material and then forming fibrils of polytetrafluoroethylene by applying a compression/shear force to the mixture above at a temperature of about 20° C. to 200° C.
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Kawazoe Mitsuyoshi
Konabe Kazuo
Mizuno Yoshitomo
Urano Teruo
Buchanan & Ingersoll & Rooney PC
Du Pont-Mitsui Fluorochemicals Co., Ltd.
Murakashi Lime Industry Co., Ltd.
Nippo Corporation
Ogden, Jr. Necholus
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