Compositions – Preservative agents – Anti-caking – separative or protective coatings or zones
Patent
1995-04-26
1996-01-02
Mulcahy, Peter D.
Compositions
Preservative agents
Anti-caking, separative or protective coatings or zones
71 6407, 427221, 524414, 524415, 524423, 524424, 524425, 524433, 524436, C09K 300
Patent
active
054805848
ABSTRACT:
Dust-control treatment of dusty powder, which mainly passes through a 100 mesh sieve, such as pigment and fertilizer, is achieved by, firstly blending the dusty powder with fibrillatable polytetrafluoroethylene and a pair of materials capable of initiating an exothermic reaction upon contact, and then subjecting the blended material to compression-shear under the exothermic reaction and raising the temperature of the blended material to 50.degree.-300.degree. C. The polytetrafluoroethylene fibrillates during the compression-shear and the formed fibrils enclose the dusty powder to turn it to a dust-controlled one.
REFERENCES:
patent: 4767800 (1988-08-01), Nev et al.
Rahl, et al., Studies of the Morphology of Emusion-Grade Polytetrafluoroethylene; Journal of Polymer Science, Part A-2, vol. 10, pp. 1337-1349, (1972).
Kirk-Othmer, Encyclopedia of Chemical Technology; 2nd Edition, vol. 9, pp. 812-814.
Ishikawa Katuaki
Miyaji Hiroshi
Ogura Masatsune
Shimoda Tetsuya
Urano Teruo
Dupont-Mitsu Fluorochemicals Co., Ltd.
Mulcahy Peter D.
Murakashi Lime Industry Co., Ltd.
Nippon Hodo Co., Ltd.
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