The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 1980
Filed:
Jan. 29, 1979
Alexander McLaughlin, Meriden, CT (US);
Reinhard H Richter, North Haven, CT (US);
Harold E Reymore, Jr, Richmond, VA (US);
The Upjohn Company, Kalamazoo, MI (US);
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.