METHOD OF PRODUCING REACTIVE POLYURETHANE EMULSION Russian patent published in 2013 - IPC C08G18/10 C08G18/38 C08G18/44 C08G18/61 C08G18/79 C08G18/12 C08G18/40 C08G18/48 C08G18/66 D06N3/14 C08G18/28 C08G18/42 C08G18/50 C08G18/75 D06M15/564 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a reactive polyurethane emulsion for an impregnating composition and/or coating for textile surfaces, as well as soft polyurethane. The method of producing a reactive polyurethane emulsion involves reacting polyols with diisocyanates in a deficit, or polyols in combination with di- and/or triols with diisocyanates in a deficit to form medium-viscosity, OH group-terminated prepolymers. Further, the OH prepolymers are uniformly mixed with an external emulsifier. Water is then added to the mixture of the prepolymer and the emulsifier, and for subsequent cross-linking of the OH group-terminated prepolymers, a di-, tri- and/or polyisocyanate is added. If needed, polyols or polyisocyanates are mixed and reacted with corresponding fire-retardant, antibacterial, dirt-repellant or hydrophilic agents. The soft polyurethane obtained using said method and then dried has Shore hardness of 45-60.

EFFECT: invention enables to obtain an emulsion which is stable during storage and soft polyurethane which disperses in water very well and has good light fastness, considerably high hydrophobicity and low capacity for swelling, as well as high wear resistance of treated articles.

32 cl, 4 tbl, 6 ex