Solid laundry detergent composition having a dynamic in-wash ph profile

摘要

The present invention relates to a free-flowing solid laundry detergent composition comprising: (a) detersive surfactant; (b) from 0wt% to 10wt% zeolite builder; (c) from 0wt% to 10wt% phosphate builder; and (d) optionally from 0wt% to 10wt% silicate salt; wherein the composition has a reserve alkalinity to pH 7.5 of less than 15, and wherein upon dilution in deionised water to form a wash liquor at 10°C temperature and at 1g/L concentration has a pH profile such that: (i) 3 minutes after contact with water, the pH of the wash liquor is greater than 10; (ii) 10mins after contact with water, the pH of the wash liquor is less than 9.5; (iii) 20mins after contact with water, the pH of the wash liquor is less than 9.0; and (iv) optionally, wherein, the equilibrium pH of the wash liquor is in the range of from above 7.0 to 8.5.