Non-burning resinous compounds and structures prepared from furan resins
Abstract
Abstract NON-BURNING RESINOUS COMPOSITIONS WHICH ARE USEFUL IN BULK, AS FOAMS, AS COATINGS, OR AS ADHESIVES ARE PROVIDED BY REACTING AQUEOUS PHOSPHORIC ACID WITH NON-REDUCING POLYHYDRIC COMPOUNDS, SUCH AS ETHYLENE GLYCOL, PROPYLENE GLYCOL, GLYCERINE, AND POLYVINYL ALCOHOL, AND THEN REACTING THE COMPLEX THUS FORMED WITH A FURFURYL ALCOHOL-CONTAINING COMPOUND, SUCH AS FURFURYL ALCOHOL OR FURFURYL ALCOHOL-UREA-FORMALDEHYDE CONDENSATES. NOT LESS THAN ABOUT 3 PERCENT OF PHOSPHORUS IS REQUIRED IN THE FINAL COMPOSITION TO GIVE THE DESIRED NON-BURNING CHARACTERISTICS. THESE COMPOSITION S ARE HYDROPHOBIC AND MAINTAIN THEIR STRUCTURAL INTEGRITY AFTER WATER IMMERSION. PREFERABLY, THESE COMPOSITIONS CONTAIN A RATIO OF FURAN RESIN TO PHOSPHORIC ACID-POLYHYDRIC COMPOUND COMPLEX OF GREATER THAN 1 TO 1. THE REACTION MIXTURE MAY CONTAIN A PNEUMATOGEN AND SURFACTANT.
Inventors
- 👤 R Wade
Bibliographic Details
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