US 12,344,810 B2
Grease composition and production method of grease composition
Kanako Takahara Niiya, Yao (JP); and Junya Matsuyama, Nagoya (JP)
Assigned to JTEKT CORPORATION, Kariya (JP)
Appl. No. 18/579,569
Filed by JTEKT CORPORATION, Kariya (JP)
PCT Filed Jun. 29, 2022, PCT No. PCT/JP2022/025934
§ 371(c)(1), (2) Date Jan. 16, 2024,
PCT Pub. No. WO2023/002820, PCT Pub. Date Jan. 26, 2023.
Claims priority of application No. PCT/JP2021/027389 (WO), filed on Jul. 21, 2021.
Prior Publication US 2024/0327742 A1, Oct. 3, 2024
Int. Cl. C10M 169/00 (2006.01); C10M 105/68 (2006.01); C10M 119/02 (2006.01); C10M 123/04 (2006.01); C10M 169/06 (2006.01); C10N 20/06 (2006.01); C10N 50/10 (2006.01); C10N 70/00 (2006.01)
CPC C10M 105/68 (2013.01) [C10M 119/02 (2013.01); C10M 123/04 (2013.01); C10M 169/06 (2013.01); C10M 2205/046 (2013.01); C10M 2215/1026 (2013.01); C10N 2020/06 (2013.01); C10N 2050/10 (2013.01); C10N 2070/00 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A method of producing a grease composition, comprising:
providing
a styrene-based polymer,
an amine compound,
an isocyanate compound,
a lubricating oil,
a first solvent that does not dissolve a urea compound that is generated, and
a second solvent that does not dissolve the urea compound that is generated; wherein
a content of the styrene-based polymer is 2% by mass or more and 30% by mass or less relative to a total amount of the urea compound and the styrene-based polymer;
dissolving or dispersing the amine compound in the first solvent, dissolving or dispersing the isocyanate compound in the second solvent, dissolving or dispersing the styrene-based polymer in one or both of the first solvent and the second solvent, such that a first blended solution containing at least the amine compound and a second blended solution containing at least the isocyanate compound are prepared;
blending the first blended solution and the second blended solution, and carrying out reaction of the amine compound and the isocyanate compound, such that a third blended solution containing the styrene-based polymer and the urea compound is generated; and
adding the lubricating oil after removing the first solvent and the second solvent from the third blended solution.