Refractory material
AssigneeSumitomo Durez Company, Ltd.
InventorToshiaki Nishimura
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Abstract
A refractory composition or mixture utilizing basic aggregates is disclosed which does not discolor when a phenolic binder is used, and provides improved flexural strength. The composition contains specific proportions of phenolic resin and a compound having a pKa of less than 9.5 at 25.degree. C. and basic aggregates.
Claims9
A refractory composition consisting essentially of basic refractory aggregates consisting primarily of magnesium oxides, calcium oxides and mixtures thereof, phenolic resin, hexamethylene tetramine and a compound having a pKa less than 9.5 at 25.degree. C., said phenolic resin is added to 5000 parts by weight of aggregate in an amount from about 150 to about 750 parts by weight and said compound from about 2 to about 230 parts by weight.
Dependencies are inferred from the claim text.