EP-4737540-A1 - ADDITIVE FOR THERMAL MANAGEMENT FLUID, THERMAL MANAGEMENT FLUID COMPOSITION INCLUDING SAME, AND USE THEREOF

Abstract

Proposed are an additive for a thermal management fluid, the additive including a phosphate-based compound, and a thermal management fluid composition including the same.

Inventors

• LEE, HONG WON
• KIM, HAK MOOK
• JUNG, KANG MIN
• KIM, JUNG NAM
• SHIN, SANG HYE
• LEE, KWANG KUK
• LEE, JOO HYUN

Assignees

• SK Innovation Co., Ltd.
• SK On Co., Ltd.

Dates

Publication Date

20260506

Application Date

20251014

Claims (15)

1. An additive for a thermal management fluid, the additive comprising: a phosphate-based compound.
2. The additive according to claim 1, wherein the phosphate-based compound satisfies Chemical Formula 1 below, wherein the R groups are each independently hydrogen or a functional group comprising 1 to 10 carbon atoms.
3. The additive according to claim 2, wherein at least one of the R groups is the functional group comprising 1 to 10 carbon atoms, preferably wherein the R groups are each independently a linear or a branched alkyl group comprising 1 to 10 carbon atoms or an aromatic group comprising 10 or less carbon atoms or comprising 6 or less carbon atoms.
4. The additive according to claim 2 or 3, wherein the R groups are each independently a functional group comprising 1 to 6 carbon atoms, preferably wherein the R groups are each independently a linear alkyl group comprising 1 to 6 carbon atoms.
5. The additive according to any one of claims 2 to 4, wherein the R groups further comprise a heteroatom selected from the group consisting of O, N, S, P, B, F, Cl, Br, I, and a combination thereof.
6. The additive according to any one of the preceding claims, wherein the heteroatom is a halogen atom, preferably F.
7. The additive according to any one of the preceding claims, wherein the additive satisfies ΔFP of 9°C or more, preferably at least 10°C, wherein ΔFP = (a flash point of a fluid comprising the additive) - (a flash point of a fluid free of the additive), measured according to ASTM D93 method.
8. A thermal management fluid composition comprising: a base oil; and one or more phosphate-based compounds.
9. The composition according to claim 8, wherein the phosphate-based compound is as defined in any one of claims 2 to 7.
10. The composition according to claim 8 or 9, wherein the base oil is a mineral oil.
11. The composition according to any one of claims 8 to 10, wherein the base oil has a content of at least 80 wt% with respect to the total weight of the composition, and/or wherein the phosphate-based compound has a content of more than 0 wt% and 10 wt% or less.
12. The composition according to any one of claims 8 to 11, wherein the composition further comprises a second additive that is different from the one or more phosphate-based compounds, optionally wherein the second additive comprises an antioxidant, an antifoaming agent, a corrosion inhibitor, a detergent additive, a dispersant, a friction modifier, an anti-wear agent, an extreme pressure additive, a viscosity index improver, a pour point depressant, a viscosity modifier, or a combination thereof.
13. Use of a phosphate-based compound for a thermal management fluid, optionally for cooling and heating systems, in particular for immersion cooling for immersion cooling devices or systems.
14. The use according to claim 13, wherein the phosphate-based compound is as defined in any one of claims 2 to 7.
15. Use of a phosphate-based compound as defined by Chemical Formula 1, wherein the R groups are each independently hydrogen or a functional group comprising 1 to 10 carbon atoms, to increase the flash point of a fluid composition by adding the compound to a base oil, and/or to reduce the kinematic viscosity of a fluid composition by adding the compound to a base oil.

Description

BACKGROUND 1. Technical Field The present disclosure relates to an additive for a thermal management fluid and a thermal management fluid composition including the same. The present disclosure further relates to the use of an additive for a thermal management fluid, respectively for cooling and heating systems. 2. Description of the Related Art Thermal management fluids, which are fluids used for efficient thermal transfer and control, are mainly used in cooling and heating systems. Coolants serve to reduce the temperature of a heat source by absorbing heat generated from the pyrogen. A substance that exhibits high thermal efficiency, low viscosity, low cost, non-toxicity, and chemical stability, while not causing corrosion of devices, is desirable as a coolant. With the performance enhancement of various electronics, such as electric vehicles, these electronics generate more and more heat during use. To facilitate product use and prevent shortened product life, control of the heat generated in such products must be taken into account. Immersion cooling is one of the cooling methods used for thermal management of electronic devices and computer systems. Immersion cooling allows an electronic device to make direct contact with fluids for cooling and thus is capable of effective heat removal compared to existing air cooling or water cooling methods. [Related art] [Patent Document] (Patent Document 1) WO 2023-114449 A1 SUMMARY The present disclosure relates to an additive for a thermal management fluid and a thermal management fluid composition including the same. One aspect of the present disclosure provides an additive for a thermal management fluid, the additive including a phosphate-based compound. According to one embodiment, the phosphate-based compound satisfies Chemical Formula 1 below, wherein the R groups are each independently hydrogen or a functional group comprising 1 to 10 carbon atoms. According to one embodiment, at least one of the R groups is the functional group comprising 1 to 10 carbon atoms. Preferably, the R groups may each independently be a linear or a branched alkyl group comprising 1 to 10, more preferably 1 to 8, carbon atoms or an aromatic group comprising 10 or less carbon atoms or 6 or less carbon atoms. According to one embodiment, the R groups are each independently a functional group comprising 1 to 6 carbon atoms. Preferably, the R groups may each independently be a linear alkyl group comprising 1 to 6 carbon atoms. According to one embodiment, the R groups further comprise a heteroatom. In an exemplary embodiment, the hetero atom included in one or more of the R groups may be selected from the group consisting of O, N, S, P, B, F, Cl, Br, I, and a combination thereof. According to one embodiment, the heteroatom is a halogen atom. Preferably, the heteroatom may be F. According to one embodiment, the additive satisfies ΔFP of 9°C or more, preferably at least 10°C, wherein ΔFP = (a flash point of a fluid including the additive) - (a flash point of a fluid free of the additive). Another aspect of the present disclosure provides a thermal management fluid composition including: a base oil, and one or more phosphate-based compounds. According to one embodiment, the phosphate-based compound may be as defined above by [Chemical Formula 1] or the optional or preferred specifications. According to one embodiment, the composition is applicable for immersion cooling. According to one embodiment, the base oil is a mineral oil. According to one embodiment, the base oil has a content of at least 80 wt% with respect to the total weight of the composition. According to one embodiment, the phosphate-based compound has a content of more than 0 wt% and 10 wt% or less with respect to the total weight of the composition. According to one embodiment, the composition further includes a second additive that is different from the one or more phosphate-based compounds. According to one embodiment, the additive includes an antioxidant, an antifoaming agent, a corrosion inhibitor, a detergent additive, a dispersant, a friction modifier, an anti-wear agent, an extreme pressure additive, a viscosity index improver, a pour point depressant, a viscosity modifier, or a combination thereof. According to a further aspect of the present disclosure, a phosphate-based compound may be used for a thermal management fluid, optionally for cooling and heating systems, in particular for immersion cooling for immersion cooling devices or systems. According to an embodiment of such use, the phosphate-based compound as defined above by [Chemical Formula 1], or the optional or preferred specifications thereof, may be used. According to a further aspect of the present disclosure, a phosphate-based compound as defined above by [Chemical Formula 1], or the optional or preferred specifications thereof, may be used to increase the flash point of a fluid composition by adding the compound to a base oil, and/or to reduce the kin