MODIFIED PHENOL RESIN, METHOD FOR MANUFACTURING THE SAME, PHENOL RESIN COMPOSITION, REFRACTORY COMPOSITION, RESIN COATED SAND FOR USE IN MOLD, MOLDING MATERIAL, NONWOVEN FABRIC, CURED PRODUCT, CARBONIZED PRODUCT, AND ACTIVATED CARBON

摘要

PROBLEM TO BE SOLVED: To provide a modified phenol resin which makes it possible to harden with no need to blend hexamethylenetetramine separately.;SOLUTION: The modified phenol resin is obtained by allowing a phenol resin to react with hexamethylenetetramine. Since hexamethylenetetramine is added to a phenol skeleton or otherwise to be contained the resin, heating the resin decomposes the hexamethylenetetramine in the molecule, which then act as a hardener, the resin can be hardened without needing the blend of hexamethylenetetramine separately.;COPYRIGHT: (C)2011,JPO&INPIT