US 12,473,519 B2
Soluble laundry detergent sheets with pro-fragrance compounds
Frank Janssen, Cologne (DE); David Matulla, Hilden (DE); Beate Seebauer, Langenfeld (DE); Birgit Scheffers, Duesseldorf (DE); Susanne Schneider, Duesseldorf (DE); and Dorothea Kapitza, Duesseldorf (DE)
Assigned to Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed on Apr. 19, 2021, as Appl. No. 17/234,706.
Application 17/234,706 is a continuation of application No. PCT/EP2019/078261, filed on Oct. 17, 2019.
Claims priority of application No. 10 2018 217 949.2 (DE), filed on Oct. 19, 2018.
Prior Publication US 2021/0238515 A1, Aug. 5, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C11D 17/06 (2006.01); B29C 41/08 (2006.01); B29C 41/46 (2006.01); C11D 3/37 (2006.01); C11D 3/386 (2006.01); C11D 3/50 (2006.01); C11D 11/00 (2006.01)
CPC C11D 17/06 (2013.01) [B29C 41/08 (2013.01); B29C 41/46 (2013.01); C11D 3/3723 (2013.01); C11D 3/386 (2013.01); C11D 3/50 (2013.01); C11D 11/0082 (2013.01); C11D 2111/12 (2024.01)] 15 Claims
 
1. 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.