Foamable composition comprising a phenol aldehyde resole or a chlorinated diphenyl oxide containing a coated neutralizing agent

Claim 1

A FOAMABLE COMPOSITION, CURABLE TO A SUBSTANTIALLY NON-CORROSIVE FOAM, COMPRISING: A FORMABLE RESINOUS COMPOSITION SELECTED FROM THE GROUP CONSISTING OF FOAMABLE PHENOL-ALDEHYDE RESOLS WHICH INCLUDE A STRONG ACID CONDENSING AGENT AND FOAMABLE CHLORINATED DIPHENYL OXIDES WHICH RELEASE A STRONG MINERAL ACID UPON CURE, CURABLE AT AN ELEVATED TEMPERATURE TO A CURED FOAM CONTAINING A STRONG RESIDUAL ACID, SAID ACID IMPARTING TO THE CURED FOAM A PH LESS THAN 4.5 AND IMPARTING CORROSIVE PROPERTIES TO THE CURED FOAM, AND A PARTICULATE COATED INGREDIENT COMPRISING (A) A NEUTRALIZING MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE HYDROXIDES, CARBONATES, AND OXIDES OF ALKALI METALS, MAGNESIUM, CALCIUM, BARIUM, STRONTIUM, ANTIMONY, SILVER, ZINC, MERCURY, IRON AND LEAD, AND IN AN AMOUNT SUFFICIENT FOR SUBSTANTIALLY COMPLETE NEUTRALIZATION OF THE RESIDUAL ACID, AND TO IMPART TO THE CURED FOAM A PH FROM ABOUT 4.5 TO ABOUT 11, AND (B) A COATING ON THE PARTICULATE NEUTRALIZING MATERIAL OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF OLEIC ACID. COCONUT FATTY ACIDS, 2-ETHYLHEXOIC ACID, STEARIC ACID, BENZOIC ACID, PHTHALIC CID, MALEIC ACID, OXALIC ACID, PARAFFIN WAX, BEES WAX, NAPHTHALENE, PETROLEUM JELLY, CAMPHOR, OZOKERITE, ASPHALT, PITCH, CARNAUBA WAX AND POLYETHYLENE OXIDE WAX EFFECTIVELY ENCAPSULATING THE NEUTRALIZING MATERIAL AND PREVENTING REACTION BETWEEN THE NEUTRALIZING MATERIAL AND THE ACID AT TEMPERATURES BELOW THE ELEVATED TEMPERATURE AT WHICH A CURED FOAM IS PRODUCED, BUT INEFFECTIVE TO PREVENT SUCH REACTION AT TEMPERATURES BELOW THOSE AT WHICH THERMAL DECOMPOSITION OF THE FOAM OCCURS.