AQUEOUS SOLUTION CONTAINING COMPLEX OF COMPLEXING AGENTS Russian patent published in 2019 - IPC C11D3/33 C11D3/37 C11D17/08 C11D7/22 C11D7/26 C11D7/32 

FIELD: chemistry.

SUBSTANCE: invention relates to aqueous compositions. Described is an aqueous composition for use as detergents for washing and for automatic dish washing compositions with content of complexing agent (A) and complexing agent (B) in range of 40 wt. % to 60 wt. %, containing (A) complexing agent, selected from methylglycine diacetic acid (MGDA), which is at least partially neutralized with an alkali metal, and at least one complexing agent different from MGDA, selected from (B) glutamic acid-diacetic acid (GLDA), which is at least partially neutralized with an alkali metal, and (C) a polymer selected from polyamines, wherein N atoms are partially or completely replaced with CH₂COOH groups, partially or completely neutralized with cations of an alkali metal, and (D) at least one salt of an organic acid alkali metal, wherein said salt is selected from mono- and dicarboxylic acids, where the weight ratio of complexing agent (A) to complexing agent (B) ranges from 10:1 to 1:10.

EFFECT: technical result is creation of highly concentrated aqueous solutions of complexing agents, which are stable at temperature from zero to 50 °C.

15 cl