| abstract |
This water-permeability-imparting agent contains the alkylene oxide adduct (A) of a polyvalent active hydrogen compound expressed by general formula (1), wherein the ratio in average addition mole number of A 1 O and CH 2 CH 2 O in general formula (1) is n/m = 0 to 0.5. R-[O(A 1 O) m -(CH 2 CH 2 O) n -H] l (1) [In general formula (1), R represents a residue of the polyvalent active hydrogen compound from which all active hydrogen is removed. A 1 O represents a C2-4 alkyleneoxy group. m represents the average addition mole number of A 1 O, and is a number from 4 to 50. n represents the average addition mole number of CH 2 CH 2 O. l represents valence, and is an integer from 3 to 6.] |