Soluble laundry detergent sheets with pro-fragrance compounds

A method for manufacturing a water-soluble laundry detergent sheet, the method comprising the steps:

• (i) providing an aqueous liquid composition comprising the following components:
• (a) at least one pro-fragrance compound and/or zinc diricinoleate,
• (b) at least one surfactant,
• (c) at least one water-soluble polymer,
• (d) optionally at least one washing booster,
• (e) optionally at least one perfume component, and
• (f) optionally at least one adjunct detergent ingredient;
• (ii) applying the composition of step (i) onto a heated surface such that it forms a layer on said surface, said surface moving in a rising direction;
• (iii) draining excess composition from the surface in a direction opposite the rising direction;
• (iv) drying said layer at a temperature of 70° C. to 90° C. for a period of 1 to 60 seconds to obtain a laundry detergent sheet containing up to 5 wt. % of water based on the total weight;
• and
• (v) optionally cutting the laundry detergent sheet into pieces of a desired shape and size;
• and
• (vi) optionally packaging one or more laundry detergent sheets obtained in step (v);
• wherein the at least one perfume component is in amounts from 0.01 to 20 wt.-% based on the total weight of the composition;
• wherein the at least one pro-fragrance compound is selected from the group consisting of silicic acid fragrance derivatives, oxazolidine derivatives of fragrances, β-thio carbonyl pro-fragrances and mixtures thereof and is contained in the composition in amounts from 0.001 to 10 wt.-% based on the total weight of the composition;
• and
• where zinc diricinoleate, if present, is in amounts from 0.001 to 20 wt.-% based on the total weight of the composition.