	US 11,680,229 B2
	Pyrithione preservative system and C1-C12 ethoxylated alcohol in solid rinse aid compositions
Tobias Foster, Cologne (DE); Andrew M. Jensen, Saint Paul, MN (US); Katherine Molinaro, Saint Paul, MN (US); Nathan D. Peitersen, Saint Paul, MN (US); and Elaine Black, Saint Paul, MN (US)
Assigned to ECOLAB USA INC., Saint Paul, MN (US)
Filed by ECOLAB USA INC., Saint Paul, MN (US)
Filed on Mar. 23, 2022, as Appl. No. 17/656,075.
Application 17/656,075 is a continuation of application No. 16/947,896, filed on Aug. 24, 2020, granted, now 11,312,925.
Application 16/947,896 is a continuation of application No. 16/408,686, filed on May 10, 2019, granted, now 10,781,403, issued on Sep. 22, 2020.
Application 16/408,686 is a continuation of application No. 16/108,336, filed on Aug. 22, 2018, granted, now 10,865,363, issued on Dec. 15, 2020.
Application 16/108,336 is a continuation of application No. 15/241,288, filed on Aug. 19, 2016, granted, now 10,081,781, issued on Sep. 25, 2018.
Claims priority of provisional application 62/208,343, filed on Aug. 21, 2015.
Prior Publication US 2022/0213413 A1, Jul. 7, 2022
Int. Cl. C11D 1/72 (2006.01); C11D 3/34 (2006.01); C11D 3/32 (2006.01); C11D 3/48 (2006.01); C11D 3/04 (2006.01); C11D 3/06 (2006.01); C11D 3/10 (2006.01); C11D 3/20 (2006.01); C11D 3/37 (2006.01); C11D 17/00 (2006.01)

CPC C11D 3/349 (2013.01) [C11D 3/046 (2013.01); C11D 3/06 (2013.01); C11D 3/10 (2013.01); C11D 3/2075 (2013.01); C11D 3/323 (2013.01); C11D 3/3418 (2013.01); C11D 3/3707 (2013.01); C11D 3/48 (2013.01); C11D 17/0047 (2013.01); C11D 17/0052 (2013.01); C11D 17/0073 (2013.01)]

19 Claims

1. A solid rinse aid composition comprising:

a) from about 0.05 wt-% to about 20 wt-% of a pyrithione preservative;

b) from about 5 wt-% to about 80 wt-% of hardening agent comprising a solid acid;

c) two or more nonionic surfactants comprising one or more alcohol alkoxylates having the formula R—O—(CH₂CH₂O)_n—H, wherein R is a (C₁-C₁₂) alkyl group and n is an integer in the range of 1 to 100, and an ethylene oxide-propylene oxide (EO/PO) copolymer, wherein the ratio of the EO/PO copolymer to alcohol ethoxylate(s) is from about 1.5:1 to about 10:1; and

d) additional functional ingredients,

wherein the composition is a solid concentrate, and the solid concentrate generates a stable and aqueous use solution having a pH of about 1 to about 9.