Foamable composition comprising a halomethylated diaromatic ether, an organic solvent, and a finely divided solid salt of carbonic acid; process of foaming same; and foamed product

Claim 1

A THERMALLY, FOAMABLE COMPOSITION OF MATTER COMPRISING A HALOMETHYLATED DIAROMATIC ETHER OF THE BENZENE SERIES HAVING AN AVERAGE HALOMETHYL FUNCTIONALITY OF AT LEAST ABOUT 1 AND UP TO ABOUT 4 PER MOLECULE, WHEREIN THE HALOGENS ARE SELECTED FROM THE GROUIP CONSISTING OF CHLORINE AND BROMINE, AND FROM ABOUT 0.1 TO ABOUT 4 PERCENT OF WEIGHT, BASED ON THE WEIGHT OF THE HALOMETHYLATED DIAROMATIC ETHER, OF EACH OF (1) AN ORGANIC SOLVENT COMPOSED ESSENTIALLY OF PARAFFINS HAVING FROM 7 TO 50 CARBON ATOMS AND A BOILING POINT ABOVE AND AMELTING POINT BELOW A TEMPERATURE SUFFICIENT TO CAUSE THE HALOMETHYLATED DIAROMATIC ETHER COMPOSITION TO FOAM AND (2) A FINELY DIVIDED SOLID SALT OF CARBONIC ACID SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM CARBONATES AND BICARBONATES AND ALKALINE EARTH METAL CARBONATES.