| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to a method of producing microporous coatings, wherein a composition is foamed and dried, said composition containing an aqueous, anionically hydrophilised polyurethane dispersion (I) and a cationic coagulant (II), wherein the cationic coagulant (II) is a polymer with number-average molecular weight ranging from 500000 to 50000000 g/mol, which has structural links of general formulae and , ^ where R denotes C=O, -COO(CH2)2- or -COO(CH2)3- and X- denotes a halide ion. The invention also describes a microporous coating obtained using said method, a composition for producing microporous coatings and a substrate coated with said microporous coating. ^ EFFECT: production of microporous coatings using a novel method, having good mechanical properties and a thin microporous structure. ^ 10 cl, 9 ex, 1 tbl |
