초록 ▼

This invention relates to improved aluminous cement/gypsum compositions that contain polymer latex emulsions or compounds to produce self-curing, crack-free, fast-setting, high early strength, high bonding, water resistant, durable, cementitious mixtures for finishing, coating, plastering, stucco, r

This invention relates to improved aluminous cement/gypsum compositions that contain polymer latex emulsions or compounds to produce self-curing, crack-free, fast-setting, high early strength, high bonding, water resistant, durable, cementitious mixtures for finishing, coating, plastering, stucco, rigid insulation protection, topping, resurfacing, patching, mortaring, tile grouting, concrete, and the like. In addition, this invention discloses a method for improving the properties and performance of aluminous cement/gypsum compositions by adding certain types, amounts and/or combinations of polymer latex emulsions or compounds with or without the addition of wet expansion and drying shrinkage inhibitors.

대표청구항 ▼

A cementitious composition consisting essentially of an aluminous cement in an amount of 60 to 95 parts by weight; gypsum in an amount of 5 to 40 parts by weight, a first polymer latex emulsion, such that the percent polymer solids of the emulsion range from about 1 to 25 weight percent based on the

A cementitious composition consisting essentially of an aluminous cement in an amount of 60 to 95 parts by weight; gypsum in an amount of 5 to 40 parts by weight, a first polymer latex emulsion, such that the percent polymer solids of the emulsion range from about 1 to 25 weight percent based on the amount of aluminous cement and gypsum in the cementitious composition; a surfactant in an amount sufficient to form a surface coating on the polymer solids to stabilize the emulsion and prevent coagulation or agglomeration thereof; and an antifoaming agent in an amount sufficient to prevent excess air entrapment in the composition and to prevent excessive foam when the composition is mixed with water.