Concrete preparation with aqueous solution of product from polye

Details Concrete preparation with aqueous solution of product from polye Concrete preparation with aqueous solution of product from polye

1979-01-29

1980-10-14

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 37N, C08L 7508

Patent

active

042280532

ABSTRACT:
The structural strength properties of concrete and its resistance to sealing are improved by incorporating into the concrete-forming mixture an aqueous solution obtained by admixing polymethylene polyphenyl polyisocyanates with less than a stoichiometric amount of a polyethylene glycol (MW 600 to 3000) or polypropylene glycol tipped with 15 to 85 percent ethylene oxide (MW 1000 to 3500) and, within a short time of completing the admixture but during the period where said mixture is completely soluble in water, dissolving said mixture in water. Optionally, a difunctional extender is added to the solution so obtained in an amount less than that required to react with all the excess isocyanate groups.

REFERENCES:
patent: 2948691 (1960-08-01), Windemuta et al.
patent: 3061470 (1962-10-01), Kuemmerer
patent: 3763070 (1973-10-01), Shearing
patent: 3894131 (1975-07-01), Speech
patent: 3897581 (1975-07-01), Nakatsuka et al.
patent: 3996154 (1976-12-01), Johnson et al.
patent: 4127548 (1978-11-01), Alexander

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