| 摘要 |
The present invention aims to provide a polyurethane resin for moisture-permeable waterproof materials which is excellent in all of the moisture permeability, waterproofness, and resistance to washing. The polyurethane resin for moisture-permeable waterproof materials according to the present invention is a polyurethane resin for moisture-permeable waterproof materials, obtainable by reacting an active hydrogen component (A1) with an organic polyisocyanate component (B),
wherein the active hydrogen component (A1) includes
an oxyethylene group-containing high molecular weight diol (a1), and
a compound (S1) containing at least one active hydrogen atom and being represented by the following formula (1):
wherein X 1 represents a residue produced by removing c piece (s) of active hydrogen atom(s) from an active hydrogen-containing compound having a valence of m, the c representing an integer satisfying the inequality: 1 ‰¤ c ‰¤ m, the m representing an integer of 1 to 20;
X 2 represents a residue produced by removing one piece of active hydrogen atom from an active hydrogen-containing compound, and a plurality of X 2 s may be the same as or different from one another;
X 1 and X 2 may be the same as or different from each other;
Y represents a residue produced by removing all of carboxyl groups from an aromatic polycarboxylic acid having a valence of 3 or more, wherein an aromatic ring in Y consists of carbon atoms, the carbon atoms are each optionally bound to a halogen atom and/or a substituent other than a carboxyl group, and at least one of the carbon atoms has no substituent;
a represents an integer of not smaller than 1;
b represents an integer of not smaller than 0; and a and b satisfy the inequality: 2 ‰¤ a+b ‰¤ d-2, wherein d represents the number of hydrogen atoms bound to the carbon atoms forming the aromatic ring of the aromatic polycarboxylic acid when all of substituents including a carboxyl group in the aromatic polycarboxylic acid are substituted by hydrogen atoms, i. e . , the number of substitutable sites on the aromatic ring. |
