Mixtures of phenolic novolaks for use with refractory aggregate and methods for making same
AssigneeBorden Chemical, Inc.
InventorArthur Harry Gerber
Life of this patent
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Abstract
A binder solution of a phenolic novolak resin in solvent, preferably furfuryl alcohol containing at least one chemical agent such as amines containing one to five, preferably two to four, nitrogen atoms, glycerine or mixtures thereof. Preferably, the binder solution contains about 0.2 to about 1.5 weight percent water. The binder solution is for binding refractory objects, preferably those containing doloma (calcined dolomite) aggregate. Methods of mixing these ingredients and using the mixture are also disclosed. Bricks made from the doloma aggregate mixed with the binder solution show good ambient temperature green strength and enhanced modulus of rupture after curing and coking.
Claims24
A composition comprising:
- a binder comprising:
- (i) a solvent;
- (ii) a phenolic novolak resin dissolved in the solvent;
- and
- (iii) a chemical agent for improving green strength of a doloma aggregate-containing green body bound by the binder,
- wherein the chemical agent is selected from the group consisting of poly(dialkylaminomethyl) substituted phenol, poly(dialkylaminomethyl) substituted bisphenol, poly(dialkylaminomethyl) substituted polyphenol, N, N, N', N'-tetra alkyl substituted diamine having an alkylene group of 2 to 6 carbon atoms between its nitrogen atoms, triethylene diamine, piperazine, ethylene diamine, poly(ethylene amines), 1, 3, 5-trialkyl hexahydro-s-triazines, formamide, (lower) alkoxymethylated melamine-formaldehyde resin, tetramethyl guanidine, glycerine, 1, 3-alkyldiol having 3 to 6 carbon atoms, a chloride soluble in the binder, and mixtures thereof;
- wherein amine-containing chemical agents are optionally at least partially neutralized by an acid, the binder contains about 0.2 to about 10 weight percent water, and the binder contains up to about 4 weight percent of a phenol.
A composition comprising:
- a binder comprising:
- (i) a solvent
- (ii) a phenolic novolak resin dissolved in the solvent;
- and
- (iii) a chemical agent for improving green strength of a refractory aggregate-containing green body bound by the binder;
- wherein the binder contains about 0.2 to about 1.5 weight percent water.
A composition comprising:
- a binder comprising:
- (i) a solvent
- (ii) a phenolic novolak resin dissolved in the solvent;
- and
- (iii) a chemical agent for improving green strength of a doloma aggregate-containing green body bound by the binder,
- wherein the chemical agent is selected from the group consisting of amines, other than hexamethylenetetramine, having 1 to 5 nitrogen atoms, (lower) alkoxylated melamine-formaldehyde resin, formamide, glycerine, 1, 3-alkyl diol having 3 to 6 carbon atoms, a chloride soluble in the binder and mixtures thereof;
- wherein amine-containing chemical agents are optionally at least partially neutralized by an acid, the binder contains about 0.2 to about 10 weight percent water, and the binder contains up to about 4 weight percent of a phenol.
Dependencies are inferred from the claim text.