Process for preparing cement product

Details Process for preparing cement product Process for preparing cement product

1977-11-03

1979-05-01

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106120, C04B 702

Patent

active

041521684

ABSTRACT:
A process comprising the steps of adding an inorganic foamed aggregate, an inorganic solid aggregate and a reinforcing fiber to cement to prepare a cement mixture, kneading the cement mixture with addition of 3 to 15% by weight of water based on the mixture to obtain a relatively hard kneaded mixture, press-molding the kneaded mixture at pressure of 200 to 600 kg/cm.sup.2, adding water to the molded piece to adjust the water content thereof, preheating the molded piece at a temperature of 40.degree. to 70.degree. C. before curing, spraying to the surface of the heated molded piece an aqueous dispersion prepared from resin and cement-type coloring material and containing inorganic particles 0.1 to 1.5 mm in size, drying the coated piece, applying a colored resin composition to the coating, and curing the resulting piece in an autoclave with pressurized steam, whereby a colored roofing panel or like cement product can be prepared.

REFERENCES:
patent: 3219467 (1965-11-01), Redican et al.
patent: 3870553 (1975-03-01), Hussey
patent: 4043826 (1977-08-01), Hum

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