Method for recovering polyol from a polyurethane

Details Method for recovering polyol from a polyurethane Method for recovering polyol from a polyurethane

1975-07-31

1977-08-23

Myers, Jane S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12506

Patent

active

040440460

ABSTRACT:
A method for recovering polyol from a polyurethane comprises dissolving the polyurethane in a specific aliphatic diol and heating the dissolved polyurethane in the presence of a halogenated ester of phosphoric acid to recover the polyisocyanate used for the production of the polyurethane as a solid form and the polyol used for the production of the polyurethane together with the polyol having urethane bond formed by reaction with the aliphatic diol as a liquid.

REFERENCES:
patent: 3632530 (1972-11-01), Kinoshita

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