Method for producing high-strength inorganic cement articles
Patent 4663104 Issued on May 5, 1987. Estimated Expiration Date: 
February 20, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 20, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of manufacturing cement products having superior mechanical strength Patent #: 4407769 InventorsAssigneeApplicationNo. 06/703314 filed on 02/20/1985US Classes:264/602, With coating outside of mold264/333, Inorganic hydraulic settable material shaping264/628, Producing microporous article (e.g., filter, etc.)264/641, Producing uniformly dispersed particulate fiber containing article264/669Utilizing binder to add green strength to preformExaminersPrimary: Derrington, JamesAttorney, Agent or FirmInternational ClassC04B 40/02 (20060101)Foreign Application Priority Data1984-02-22 JPAbstractA novel method for producing a high-strength inorganic cement article is provided. The method comprises kneading under high shearing force a cement mixture containing as essential components hydraulic cement, a hydrophilic organic binder and water, molding the kneaded mixture into an article having a water-to-solid weight ratio of not more than about 0.2, preliminarily hydrating the molded article, firing the preliminarily hydrated article at about 300° to about 1000° C., and then rehydrating the fired article. The resulting cement article has bending strength of not lower than about 200 kgf/sq.cm without fibrous reinforcing materials and has that of not lower than about 350 kgf/sq.cm when reinforced with heat-resistant fiber materials. The cement article can be advantageously glazed in the above mentioned method by applying a glazing agent to a desired surface of the preliminarily hydrated article and then firing the article. | |
