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:
May. 24, 1983
Filed:
Nov. 05, 1981
Hermann Gruber, Leverkusen, DE;
Hermann Kober, Berg.-Gladbach, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The present invention is directed to a process for sealing fissures and leaks in construction by pressing sealing agents comprising liquid compounds having free isocyanate groups, and optionally auxiliary aids and additives, into the constructions to be sealed, characterized in that sealing agents which are substantially free of solvent are used which contain as compounds having free isocyanate groups reaction products of polyhydroxy polyethers with polyisocyanate mixtures of the diphenyl methane series having at least about 20% by weight, based on the weight of the polyisocyanate component, of 2,4'-diisocyanato diphenyl methane, in an NCO/OH equivalent ratio of from about 2:1 to 15:1. The present invention is also directed to the novel sealing agents used in this process.