High strength cured cement article and process for manufacturing the same
AssigneeUbe Industries, Ltd.
InventorsNobuhiro Kataoka, Hideaki Igarashi, Masanori Ohshima
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Abstract
A cured cement article containing therein an organic polymer treated with an isocyanate compound has a high flexural strength and high water resistance. The cured cement can be prepared by impregnating a cured cement article containing therein a water-soluble polymer or a water-dispersible polymer with an isocyanate compound.
Claims19
A cured cement article which contains in its voids a reaction product of a water-soluble organic polymer with an isocyanate compound which is impregnated into the voids of the cured cement by applying the isocyanate compound onto the surface of the cured cement article, said water-soluble organic polymer and said isocyanate compound being employed in amounts of 0.1 to 20 weight % and 0.1 to 32 weight %, respectively, per the amount of the cement, and said isocyanate compound being employed in an amount of 10 to 300 weight %, per the amount of the polymer.
A process for preparing a high strength cured cement article which comprises impregnating a cured cement organic polymer with an isocyanate compound through the surface of the cured cement article and heating the thus impregnated article to cause a reaction between at least a portion of the polymer and the isocyanate compound.
A process for preparing a high strength cured cement article which comprises curing a composition of a hydraulic cement, a partially hydrolyzed polyvinyl acetate, an isocyanate compound and water.
The process as claimed in claim 16, wherein said isocyanate is employed in the form of a solution in an organic solvent.
Dependencies are inferred from the claim text.