BRANCHED POLYESTERS WITH SULPHONATE GROUPS Russian patent published in 2016 - IPC C08G63/688 C08G63/91 C11D3/37 C11D3/34 

FIELD: chemistry.

SUBSTANCE: present invention relates to branched polyesters with sulphonate groups and use thereof. Described are branched polyesters with sulphonate groups, obtained by: a) conversion of components A, B, optionally C and optionally (D) into branched polyesters, wherein i) component A is selected from a group including maleic acid, itaconic acid, fumaric acid, citraconic acid, mesaconic acid or glutaconic acid (A₂), ii) a component B is selected from a group comprising triatomic or higher-atomic alcohols (By), wherein amount of triatomic or higher-atomic component (B) at step (a.) is at least 30 mol%. in terms of total amount of components A, B, C and D, iii) optionally used component C is selected from a group comprising diatomic alcohols (B₂) or dicarboxylic acids (C₂) without α,β-olefinically unsaturated bonds, and iv) optionally used component (D) is selected from fatty acids or fatty alcohols, b) and subsequent reaction of obtained at step (a) branched polyesters with hydrosulphite, molar amount of which ranges from 10 to 95 mol% in terms of amount α,β-olefinically unsaturated dicarboxylic acid (A₂). Also described is a mixture for use as dirt-removing polymers, as inhibitors of grey colouring of textile fabrics and/or are intended for dirt-repellant finishing of textile articles, which contains said branched polyesters. Also described is use of said branched polyesters as dirt-removing polymers, inhibitors of grey colouring of textile fabrics, in auxiliary agencies of textile industry, detergent and cleaning agents for textile products, additives to detergent and cleaning agents for textile products, detergent additives, agents for subsequent processing of linen or cleaning, rinsing or detergents for solid surfaces, in aqueous solutions or compositions intended for dirt-repellant finishing of textile articles. Also described is a method of producing said branched polyesters with sulphonate groups.

EFFECT: technical result is reduction of repeated contamination sedimentation on polyester fibres and reduction of grey colouring of polyester fibres.

14 cl, 2 tbl, 5 ex