COMPOSITION OF PHOSPHATE-FREE POLYMER DETERGENT Russian patent published in 2021 - IPC C11D3/37 C11D1/66 C11D3/20 

FIELD: detergent compositions.

SUBSTANCE: invention relates to detergent compositions, particularly detergent compositions for automatic washing, particularly for automatic dish washing. Composition of the phosphate-free detergent, comprising: from 1 to 15 wt % of at least one non-sulphurated water-soluble copolymer, selected from: a non-sulphurated water-soluble copolymer obtained by a polymerisation reaction: a) from 55 to 93 mol % of at least one acid selected from acrylic acid and methacrylic acid, mixtures thereof and salts thereof, b) from 2 to 25 mol % of at least one ester compound, which is an acid derivative selected from acrylic acid, methacrylic acid, itaconic acid and maleic acid, and c) from 5 to 20 mol % of at least one compound of formula (I)

(I),

in which: R¹ and R², which can be identical or different, independently represent H or CH₃, L¹ independently represents a group selected from C(O), CH₂, CH₂-CH₂ and O-CH₂CH₂-CH₂-CH₂, L² independently represents a group, selected from (CH₂-CH₂O)_x, (CH₂CH(CH₃)O)_y, (CH(CH₃)CH₂O)_z, and combinations thereof, their, y and z, which may be identical or different, independently represent integer or decimal number between 0 and 150, wherein x is strictly greater than y+z, and the sum x+y+z is between 10 and 150, and the non-sulphurated water-soluble copolymer obtained by the polymerisation reaction: a) from 55 to 93 % by weight of at least one acid selected from acrylic acid and methacrylic acid, mixtures thereof and salts thereof, b) from 2 to 25 % by weight of at least one compound ester, which is an acid derivative selected from acrylic acid, methacrylic acid, itaconic acid and maleic acid, and c) from 5 to 20 wt % of at least one compound of formula (I)

(I),

in which: R¹ and R², which can be identical or different, independently represent H or CH₃, L¹ independently represents a group selected from C(O), CH₂, CH₂-CH₂ and O-CH₂CH₂-CH₂-CH₂, L² independently represents a group, selected from (CH₂-CH₂O)_x, (CH₂CH(CH₃)O)_y, (CH(CH₃)CH₂O)_z, and combinations thereof, their, y and z, which may be identical or different, independently represent integer or decimal number between 0 and 150, wherein x is strictly greater than y+z, and the sum x+y+z is between 10 and 150, and at least one non-sulphonic non-ionic surfactant.

EFFECT: technical result is creation of a composition of phosphate-free detergent for counteraction of scale deposits, which has good film formation efficiency or good ability to reduce or eliminate water stains during automatic dish washing.

13 cl, 3 tbl