Gypsum dispersant
AssigneeToho Chemical Industry Co., Ltd.
InventorsAkira Ikeda, Seiichi Koshisaka, Katsutoshi Sato
Life of this patent
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Abstract
There is provided a gypsum dispersant and a gypsum additive that improve the fluidity of gypsum slurry even if gypsum raw materials used are different in quality and that do not induce delay of curing of gypsum slurry. A gypsum dispersant, characterized by comprising: (A) a polycarboxylic acid polymer; and (B) a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid as essential components, and/or an alkylene oxide adduct of the polyamide polyamine.
Claims21
1-5. (canceled)
A method of producing a gypsum dispersant, comprising:
- forming a mixture of water and a dispersant composition, wherein the dispersant composition includes at least a component (A) and a component (B);
- wherein the component (A) is a polycarboxylic acid polymer;
- and
- wherein the component (B) is at least one of (i) a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid as essential components, and (ii) an alkylene oxide adduct of a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid.
A method of producing a gypsum slurry, comprising:
- forming a mixture of water and a dispersant composition, the dispersant composition including at least a component (A) and a component (B), wherein the component (A) is a dispersant and the component (B) is at least one of (i) a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid as essential components, and (ii) an alkylene oxide adduct of a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid;
- and
- adding the mixture to a gypsum composition.
A method of producing a gypsum product, comprising:
- adding a dispersant composition to an admixture of water and gypsum, the dispersant composition including at least a component (A) and a component (B), wherein:
- the component (A) is a polycarboxylic acid polymer;
- and
- the component (B) is at least one of (i) a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid as essential components, and (ii) an alkylene oxide adduct of a polyamide polyamine obtained by a reaction of a polyalkylene polyamine and a dibasic acid;
- and
- mixing the dispersant composition with the admixture of water and gypsum to form a gypsum slurry.
Dependencies are inferred from the claim text.