Rigid polyurethane foams with constant or slightly decreasing st

Details Rigid polyurethane foams with constant or slightly decreasing st Rigid polyurethane foams with constant or slightly decreasing st

1986-06-17

1987-05-12

Husar, Cornelius J.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

521167, 523130, 523131, 523132, C08G 1814, E21D 1550

Patent

active

046645632

ABSTRACT:
Rigid polyurethane foams which exhibit constant or slightly decreasing strain with an increasing stress in compression are prepared employing from 30 to 60 parts of an oxyalkylated toluenediamine polyol per 100 parts of polyol mixture. These foams may be employed in shoring up geological formations.

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