DETERGENT COMPOSITION FOR WASHING WITH LOW pH Russian patent published in 2019 - IPC C11D1/02 C11D3/40 C11D3/20 C11D3/06 C11D3/08 C11D3/10 C11D11/02 C11D17/06 

FIELD: washing.

SUBSTANCE: present invention relates to a solid detergent composition for washing out of free-flowing particles. Described is a solid detergent composition for washing from free-flowing particles, comprising: (a) alkyl benzene sulfonate; (b) up to 8 wt% sodium carbonate; (c) from 4 to 20 wt% citric acid; and (d) a coloring agent having the following structure:

,

where: R₁ and R₂ are independently selected from the group consisting of: H; alkyl; alkoxy groups; alkyleneoxy groups; alkyl-substituted alkyleneoxy group; urea; and amido groups; R₃ represents a substituted aryl group; X is a substituted group containing a sulphonamide functional group and optionally an alkyl and/or aryl functional group, and wherein the substituent group contains at least one alkyleneoxy chain which contains an average molar distribution of at least four alkyleneoxy functional groups, composition when diluted to concentration of 1 wt% in deionised water at temperature of 20 °C has an equilibrium pH in range of 6.5 to 8.5, wherein composition contains 30 to 90 wt% base particles of the detergent, wherein the base detergent base contains (by weight of the base detergent): (a) from 4 to 35 wt% alkyl benzene sulfonate; (b) from 1 to 8 wt% of the zeolite detergent component; (c) up to 8 wt% sodium carbonate; (d) from 1 to 10 wt% of citric acid.

EFFECT: improved whiteness of the fabric, improved profile of solubility, good profile of cleaning, good profile of fabric care.

26 cl, 10 ex