| abstract |
PURPOSE: The titled waterproofing agent, containing a mixture of a specific organopolysiloxane and organopolyisocyanate as principal agents, respectively, and capable of imparting improved water repellency and waterproofness to a building material surface, e.g. a cellular concrete and mortar wall, sustainedly by using on the surfaces thereof. n CONSTITUTION: A waterproofing agent prepared by incorporating (A) an organopolysiloxane having two or more groups expressed by formulaI(R 1 is bifunctional 1W10C organic group; X is O, sulfur or imino) in one molecule, preferably an organopolysiloxane expressed by formula II (R 2 is monofunctional 1W10C hydrocarbon or alkoxyl; R 3 is monofunctional 1W10C hyrocarbon; n is 5W100) with (B) an oganopolyisocyanate expressed by formula III (R 4 is 4W40C hydrocarbon; m is 2W5), preferably at a molar ratio between the XH groups and NCO groups of preferably 0.8W1.2 or reacting the components in a mixed state. n COPYRIGHT: (C)1982,JPO&Japio |