Process of preparing polyetherurethane foams

Details Process of preparing polyetherurethane foams Process of preparing polyetherurethane foams

1975-06-04

1978-05-23

Ivy, C. Warren

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08K 554, C08G 1814

Patent

active

040909875

ABSTRACT:
A process for the preparation of polyetherurethane foams is disclosed, wherein polyether alcohol and polyisocyanate are foamed in the presence of water or low-boiling propellant and polyalkyleneglycol-polysiloxane mixed block polymer foam stabilizer. In accordance with the invention, the mixed block polymer foam stabilizer has the general formula ##STR1## wherein M IS UNIFORM OR APPROXIMATELY UNIFORM WITHIN EACH SILOXANE BLOCK OF EACH MOLECULE AND STANDS FOR 5 OR 6;

REFERENCES:
patent: 3402192 (1968-09-01), Naluska
patent: 3629308 (1971-12-01), Bailey
patent: 3634344 (1972-01-01), Koerner
patent: 3637541 (1972-01-01), Rossmy
patent: 3642670 (1972-02-01), Kanner
patent: 3714080 (1973-01-01), Dahm
patent: 3741917 (1973-06-01), Morehouse

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