Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1987-02-24
1988-05-17
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405267, 264 31, 264DIG7, 299 11, E02D 312, E04B 116
Patent
active
047447001
ABSTRACT:
A method of completely filling mines and underground cavities in such a way as to reinforce the strata and ground thereabove in order to prevent collapse or subsidence. The method comprises introduction into mines and cavities, expandable plastic materials which are incorporated into a chemically catalysed foam reaction and strongly bonded thereby. The heat required to expand foamable plastic materials many-fold is provided by the chemically exothermic polymerization reaction of polymeric isocyanate with polyols and epoxides by basic catalysis which promotes highly exothermic urethane/isocyanurate polymer formation in the presence of suitable blowing agents and surfactants.
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Graham, Donald L., "A New Low Density Molding Material," SPE Journal, Oct. 1957.
Andy Albert
Beale John H.
Corbin David H.
Ricci John A.
Ruano William J.
Washington Penn Plastic Co.
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