Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1993-02-04
1994-10-11
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524424, 524427, 524433, 524546, C09K 1700
Patent
active
053547870
ABSTRACT:
It is an object of the present invention to provide a soil-stabilizing agent with less emission of dust, good reactivity, good behavior at mixing and good dispersibility and a method for soil stabilizing treatment capable of restraining the emission of dust in the procedure of sprinkling and mixing of the soil-stabilizing agent to soil.
The soil-stabilizing agent according to the present invention comprises a mixture of a material mainly composed of quick lime and/or calcined dolomite and fibrillatable polytetrafluoroethylene resin.
And the method for soil-stabilizing treatment according to the present invention comprises the following steps; adding a mixture of a material mainly composed of quick lime and/or calcined dolomite and fibrillatable polytetrafluoroethylene resin to soil, and mixing them under the hydration heat generated by the reaction between the quick lime and/or calcined dolomite with moisture in the soil to form hydrated material.
When PTFE is in partially fibrillated state, emission of dust while sprinkling (primary dust) from the soil-stabilizing agent will be restrained as the particles of quick lime and/or calcined dolomite are enclosed in a cobweb-like net of the partially fibrillated PTFE, and emission of dust while mixing (secondary dust) is further restrained by a cobweb-like net of PTFE fibrillated further by mixing under hydration heat generated by the reaction of quick lime and/or calcined dolomite with moisture in the soil.
REFERENCES:
patent: 3838092 (1974-09-01), Vogt et al.
patent: 4134862 (1979-01-01), Eden et al.
Kirk-Othmer "Encyclopedia of Chemical Technology" 2nd Edition, vol. 9, 812-814.
Raiil et al., "Studies of the Morphology of Emulsion-Grade Polytetrafluorethylene." Journal of Polymer Science: Part A-2, vo.. 10 (1972), 1337-1349.
Chem. Abstracts vol. 104, 1986, 50365j, Urano Teruo; Miyaji, Hiroshi "Leach Proof Slaked Lime Fertilizers" p. 474.
Grant & Hackh's Chem. Dictionary, 1987, p. 234, fibril.
Webster's II New Riverside Dictionary, 1984, p. 474, fibril, fibrillate, fibrillation.
Japan Kokai, Full translation, English 60-191084.
Ishikawa Katuaki
Miyaji Hiroshi
Ogura Masatsune
Shimoda Tetsuya
Urano Teruo
Du Pont-Mitsui Fluorochemicals Co., Ltd.
Guarriello John J.
Michl Paul R.
Murakashi Lime Industry Co., Ltd.
Nippon Hodo Co., Ltd.
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