METHOD OF OBTAINING LATEX Russian patent published in 2017 - IPC C08F2/20 C08F36/04 C08L9/08 

FIELD: chemistry.

SUBSTANCE: process of preparation of latex emulsion (co)polymerization of vinyl series or conjugated diene monomers with vinyl monomers in an aqueous medium, in a reactor with a stirring device, in the presence of a radical initiator, emulsifiers, a molecular weight regulator and a bifunctional additive is described. Bifunctional additive simultaneously serves as a dispersant and surfactant. As a bifunctional additive, oligomeric products are used which are biodegradable oligodialkylsiloxanes (ODS) selected from α,ω-hydroxy-oligodialkylsiloxane of the formula HO-[(Alk)₂SiO]_n-OH (I), where Alk is from C₁-C₄ Alkyl group, n=10-30, α,ω-dicarboxy-oligodialkylsiloxane of the formula COOH(CH₂)₂Si(Alk)₂[OSi(Alk)₂]_m-OSi(Alk)₂(CH₂)₂COOH (II), wherein Alk is from C₁-C₄ Alkyl group, m 5-10, or mixtures thereof.

EFFECT: production of latexes without the use of leucanol, a decrease in the consumption of the emulsifier by 1,5-2 times while maintaining the stability of the reaction system during the synthesis, increasing the aggregative stability, reducing latex losses and increasing its adhesion properties, improving the water resistance and physical and mechanical properties of the products, in particular films, on its basis, reducing the consumption of used siloxanes.

16 cl, 4 tbl, 24 ex