	US 12,215,301 B2
	Magnesium carbonate as a carrier for the release of active agents in a home care formulation
Tanja Budde, Brittnau (CH); and Tobias Keller, Holziken (CH)
Assigned to OMYA INTERNATIONAL AG, Oftringen (CH)
Appl. No. 16/960,939
Filed by OMYA INTERNATIONAL AG, Oftringen (CH)
PCT Filed Jan. 25, 2019, PCT No. PCT/EP2019/051835 § 371(c)(1), (2) Date Jul. 9, 2020, PCT Pub. No. WO2019/145467, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 18153662 (EP), filed on Jan. 26, 2018.
Prior Publication US 2020/0347326 A1, Nov. 5, 2020
Int. Cl. C11D 7/12 (2006.01); C01F 5/24 (2006.01); C11D 3/12 (2006.01); C11D 7/02 (2006.01)

CPC C11D 7/02 (2013.01) [C01F 5/24 (2013.01); C11D 3/1233 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/80 (2013.01)]

21 Claims

1. A delivery system for the release of one or more active agent(s) in a home care formulation, the delivery system comprising a carrier material and one or more active agent(s) which is loaded on the carrier material,

wherein

the carrier material consists of magnesium carbonate having a specific surface area of from 25 to 150 m²/g, measured using nitrogen and the BET method according to ISO 9277:2010, and wherein the magnesium carbonate comprises synthetic hydromagnesite (Mg₅(CO₃)₄(OH)₂·4H₂O),

the delivery system comprises the one or more active agent(s) in an amount ranging from 80 to 260 wt.-%, based on the total weight of the carrier material, and

the delivery system provides a release efficiency for the one or more active agent(s) represented by the following formula (I)

of ≥63.4%.