POLYURETHANE-POLYUREA BASED MICROPOROUS COATING Russian patent published in 2012 - IPC C08G18/10 C08G18/12 C09D175/02 C09D175/04 C08G18/42 C08G18/44 C08G101/00 

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