US 12,305,110 B2
Antifreeze agents and coolants for fuel cells, storage batteries and batteries
Harald Dietl, Ludwigshafen (DE); Bayram Aydin, Ludwigshafen (DE); and Roger Sieg, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/288,991
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Oct. 25, 2019, PCT No. PCT/EP2019/079236
§ 371(c)(1), (2) Date Apr. 27, 2021,
PCT Pub. No. WO2020/094427, PCT Pub. Date May 14, 2020.
Claims priority of application No. 18204600 (EP), filed on Nov. 6, 2018; application No. 19156712 (EP), filed on Feb. 12, 2019; and application No. 19156713 (EP), filed on Feb. 12, 2019.
Prior Publication US 2021/0403782 A1, Dec. 30, 2021
Int. Cl. C09K 5/10 (2006.01); C09K 5/20 (2006.01); H01M 8/04029 (2016.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 10/613 (2014.01); H01M 10/6567 (2014.01)
CPC C09K 5/10 (2013.01) [C09K 5/20 (2013.01); H01M 8/04029 (2013.01); H01M 10/613 (2015.04); H01M 10/6567 (2015.04); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0028 (2013.01)] 17 Claims
 
1. A ready-to-use antifreeze composition for cooling systems, comprising a component (A) and a component (B),
wherein component (A) comprises at least two alkylene glycol derivatives of formula (I)

OG Complex Work Unit Chemistry
wherein
R1 is hydrogen or C1- to C4-alkyl,
R2 is C1- to C4-alkyl,
R3 is hydrogen or methyl, and
n is on arithmetic average a number from 3.0 to 4.0; and
wherein component (B) comprises at least one corrosion inhibitor selected from the group consisting of
(Ba) an orthosilicate ester and/or an alkoxyalkylsilane,
(Bb) an azole derivative, and
(Bc) a compound of general formula (II)

OG Complex Work Unit Chemistry
wherein
R4 is an organic radical having 6 to 10 carbon atoms,
p and q are independently of one another a positive integer from 1 to 30, and
each Xi for i=1 to p and 1 to q are independently of one another selected from the group consisting of —CH2—CH2—O—, —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH(C2H5)—O—, —CH(C2H5)—CH2—O—, —CH(CH3)—CH(CH3)—O—, —CH2—CH2—CH2—O-and-CH2—CH2—CH2—CH2—O—; and
with the proviso that the composition comprises:
less than 1 wt % of water,
a proportion of alkylene glycol derivatives of formula (I) wherein n≤2 of not more than 10 wt %,
a proportion of alkylene glycol derivatives of formula (I) wherein n≥5 of not more than 5 wt %,
a ratio of alkylene glycol derivatives of formula (I) wherein n=3 to those wherein n=4 is from 95:5 to 40:60; and
a proportion of monoethylene glycol, diethylene glycol, monopropylene glycol, dipropylene glycol, 1,3-propylene glycol or glycerol, if present, of not more than 10 wt %.