Utilization of latexes with hydraulic cement and gypsum compositions
Patent 4746365 Issued on May 24, 1988. Estimated Expiration Date: February 2, 2007. 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.
524/4, Solid polymer or specified intermediate condensation product derived from at least one oxygen-containing reactant and which is devoid of a fused ring or bridged ring system106/695, With other cement material (e.g., Portland, calcium sulfate, etc.)524/5, Derived from carboxylic acid or derivative524/8Solid polymer derived from ethylenically unsaturated hydrocarbon only
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, motaring, 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.
Other References
Wagner, "Polymer Modification of Portland Cement Systems," CHEMTECH, 2/73, pp. 105-108
Eash et al., "Reactions of Polymer Latexes with Portland Cement Concrete"
Isenburg et al., "A Hypothesis for the Reinforcement of Portland Cement by Latex," pp. 1197-1202
Whiting et al., "Epoxy Impregnation of Portland Cement Concrete," pp. 1154-1156
Pike et al., "Polymer Resins as Admixtures in Portland Cement Mortar and Concrete," (Abstract), 9/25/73
Dierkes et al., "Effect of Synthetic Macromolecular Additives on the Formation of Hydration Products of Portland Cement and Gypsum" (Abstract No. 84:64543w), 1976
Cherkinskii et al., "Chemical Stability of Latex-Cement Compositions," (Abstrtact 144244c), 1975
Okorokov et al., "Use of Polymers as Additives to Hydraulic Concrete" (Abstract 74035e), 1975
Kravchenko et al., "Composition for Floor Coatings" (Abstract 175235e), 1974
Zhangabylov et al., "Coagulation of Divinylstyrene Latex in Suspensions of Portland Cement . . . ," (Abstract 117559v), 1972
Okorokov et al., "Crack Resistance of Hydraulic Concrete by Addition of Polymeric Additives" (Abstract 24245z), 1972
February 2, 2007. 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.
