The present invention relates to a porous layer structure containing a base material and a polyurethane porous layer formed on the base material, wherein a moisture permeability A of the porous layer structure measured by JIS L1099 A-1 (calcium chloride method) is 2000 to 10000 g/(m.sup.2.Math.24 h), a moisture permeability loss rate obtained by a predetermined formula from a moisture permeability B of the base material alone measured by JIS L1099 A-1 (calcium chloride method) and the moisture permeability A is 75% or less, and a peel strength at a bonding surface between the base material and the polyurethane porous layer is 0.7 kgf/inch or more.

The present application relates to aziridine functional compounds with reduced genotoxicity and good crosslinking efficiency, for use in the preparation of, for example, coatings. ##STR00001##

The present application relates to aziridine functional compounds with reduced genotoxicity and good crosslinking efficiency, for use in the preparation of, for example, coatings. ##STR00001##

The present invention relates to an aqueous coating composition comprising a multi-aziridine compound and a carboxylic acid functional polymer, characterized in that (i) the composition is an aqueous dispersion having a pH ranging from 8 to 14, (ii) the aqueous dispersion comprises particles X which particles X comprise multi aziridine compound and particles Y which particles Y comprise carboxylic acid functional polymer, and (iii) said multi-aziridine compound has: a) from 2 to 6 of the following structural units A: b) one or more linking chains wherein each one of these linking chains links two of the structural units A; and c) a molecular weight in the range from 500 to 10000 Daltons. ##STR00001##

The present invention relates to an aqueous coating composition comprising a multi-aziridine compound and a carboxylic acid functional polymer, characterized in that (i) the composition is an aqueous dispersion having a pH ranging from 8 to 14, (ii) the aqueous dispersion comprises particles X which particles X comprise multi aziridine compound and particles Y which particles Y comprise carboxylic acid functional polymer, and (iii) said multi-aziridine compound has: a) from 2 to 6 of the following structural units A: b) one or more linking chains wherein each one of these linking chains links two of the structural units A; and c) a molecular weight in the range from 500 to 10000 Daltons. ##STR00001##

A resin dispersion liquid for inkjet ink contains: a polyurethane resin having a constituent unit derived from (A) polyisocyanate, a constituent unit derived from (B) polyol, and a constituent unit derived from (C) polyamine; and water. The (B) polyol includes (B1) polyether polyol and (B2) diol compound having a carboxy group and/or a carboxylate group. The (C) polyamine includes (C1) first polyamine having two groups selected from an amino group, an imino group, and a hydrazide group, and (C2) second polyamine having three or four groups selected from an amino group, an imino group, and a hydrazide group.