Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1981-11-05
1983-05-24
Cockeram, H. S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
166295, 521137, 521160, 523132, C08G 1814, C08G 1832, E21B 3313
Patent
active
043851320
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.
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Lehrbuch Der Organischen Chemie, (1968), p. 118.
Encyclopedia of Chemical Technology, Kirk Othmer, 2nd Edition, 1968, vol. 15, p. 783 and Third Edition, 1982, vol. 18, p. 114.
Webster's Collegiate Dictionary, (1976), p. 419.
Gruber Hermann
Kober Hermann
Bayer Aktiengesellschaft
Cockeram H. S.
Harsh Gene
Pope Lawrence S.
Roy Thomas W.
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