Accelerators for refractory magnesia
AssigneeBorden, Inc.
InventorArthur H. Gerber
Life of this patent
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Abstract
The hardening of a composition containing a phenolic resin solution and a magnesia aggregate is effected by mixing into such composition at a pH of at least 4.5: a compound which provides an acetate, adipate, 1,2,4-benzenetricarboxylate, formate, glycolate, lactate, nitrate, benzenesulfonate, naphthalenesulfonate, methanesulfonate, phenolsulfonate, succinate, sulfamate, or toluenesulfonate anion to the composition; or a mixture of said compounds.
Claims35
A method for accelerating the ambient temperature hardening of a mixture of a phenolic resin and magnesia aggregate wherein the mixture has a pH of at least 4.5 which comprises mixing:
- A. magnesia aggregate;
- B. a curable phenolic resole resin solution having a viscosity of about 100 to 10,000 cps at 25.degree. C., the quantity of said resin being sufficient to bind the aggregate on thermal curing of the resin;
- and
- C. accelerate the ambient temperature hardening of said mixture, said compound selected from the group consisting of:
- a compound which provides to the mixture acetate, adipate, 1,2,4-benzenetricarboxylate, formate, glycolate, lactate, nitrate, benzenesulfonate, naphthalenesulfonate, methanesulfonate, phenolsulfonate, succinate, sulfamate, or toluenesulfonate anions;
- and a mixture of said accelerator compounds.
A method for accelerating the ambient temperature hardening of a mixture of a phenolic resole resin and magnesia aggregate at a pH of at least 4.5 which comprises mixing:
- A. magnesia aggregate;
- B. a hardenable phenolic resole resin solution having a viscosity of from about 100 to 10,000 cps at 25.degree. C., a water content of about 3% to 15% by weight, said resole being in a quantity sufficient to bind the magnesia on hardening;
- and
- C. an accelerator compound in an amount sufficient to accelerate the ambient temperature hardening of said mixture, said compound selected from the group consisting of:
- a compound which provides to the mixture acetate, adipate, 1,2,4-benzenetricarboxylate, formate, glycolate, lactate, nitrate, benzenesulfonate, naphthalenesulfonate, methanesulfonate, phenolsulfonate, succinate, sulfamate, or toluenesulfonate anions;
- and a mixture of said accelerator compounds.
A binder-aggregate composition having a pH of at least 4.5 which comprises a wet mixture of:
- A. magnesia aggregate;
- B. a curable phenolic resole resin solution having a viscosity of about 100 to 10,000 cps at 25.degree. C., the quantity of said resin being from about 3% to 15% by weight of the magnesia;
- and
- C. an accelerator compound in an amount sufficient to accelerate the ambient temperature hardening of said mixture, said compound selected from the group consisting of:
- a compound which provides to the mixture acetate, adipate, 1,2,4-benzenetricarboxylate, formate, glycolate, lactate, nitrate, benzenesulfonate, naphthalenesulfonate, methanesulfonate, phenolsulfonate, succinate, sulfamate, or toluenesulfonate anions;
- and a mixture of said accelerator compounds.
A binder-aggregate composition having a pH of about 4.5 to 10 and is hardenable at room temperature which is prepared by mixing:
- A. magnesia aggregate;
- B. a hardenable phenolic resole resin solution containing from 3% to 15% of water by weight of the resin, the quantity of said resin being from 3% to 15% based on the weight of the magnesia;
- and
- C. from about 0.5% to 6% by weight, based on the weight of the resin, of an accelerator compound to said compound selected from the group consisting of:
- a compound which provides acetate, adipate, 1,2,4-benzenetricarboxylate, formate, glycolate, lactate, nitrate, benzenesulfonate, naphthalenesulfonate, methanesulfonate, phenolsulfonate, succinate, sulfamate, or toluenesulfonate anions to the mixture;
- and a mixture of said accelerator compounds.
Dependencies are inferred from the claim text.