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

1984-09-21

1986-09-30

Cockeram, Herbert S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

405288, 523130, 523131, 523132, C08G 1814, C08G 1832

Patent

active

046147543

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 alkoxylated toluenediamine polyol per 100 parts of polyol mixture. These foams may be employed in shoring up geological formations.

REFERENCES:
patent: 3072582 (1963-01-01), Frost
patent: 3336245 (1967-08-01), Britain
patent: 3423344 (1969-01-01), Odinak et al.
patent: 3493525 (1970-02-01), Britain
patent: 4243759 (1981-01-01), Haas
patent: 4397966 (1983-08-01), Stolz et al.
patent: 4469822 (1984-09-01), Stolz et al.

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