Grease composition, bearing prelubricated with grease, and rotation-transmitting apparatus with built-in one-way clutch
A technology of grease composition and grease seal, applied in the direction of one-way clutches, lubricating compositions, clutches, etc., can solve problems such as insufficient countermeasures, and achieve the effect of preventing peeling or friction and wear
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Embodiment 1-1～ Embodiment 1-5
[0175] In half the amount of the base oil shown in Table 1-1, dissolve 4,4-diphenylmethane diisocyanate (trade name Mirione MT manufactured by Nippon Polyurethane Industry Co., Ltd., hereinafter referred to as MDI), in the remaining half of the base oil, dissolve the monoamine that becomes 2 times the equivalent of MDI. The mix proportions and types are shown in Table 1-1.
[0176] While stirring the solution in which MDI is dissolved, add the solution in which monoamine is dissolved, and then continue to stir at 100-120°C for 30 minutes to make it react, so that the diurea compound is formed in the base oil.
[0177] Add organic bismuth and antioxidant to it according to the compounding ratio shown in Table 1-1, and stir at 100-120°C for 10 minutes. Thereafter, it was cooled and homogenized using triple rollers to obtain a grease composition.
[0178] In Table 1-1, the synthetic hydrocarbon oil used as base oil has a kinematic viscosity of 47mm at 40°C 2 Nippon Steel Chemi...
Embodiment 1-6～ Embodiment 1-10
[0195] Embodiment 1-6~Example 1-10, Embodiment 1-13, Embodiment 1-14
[0196] In half the amount of base oil shown in Table 1-2, dissolve 4,4-diphenylmethane diisocyanate (MDI) in the ratio shown in 1-2, and dissolve it in the remaining half of the base oil to become 4 , 2 times the equivalent of 4-diphenylmethane diisocyanate monoamine. The mix proportions and types are shown in Table 1-2.
[0197] While stirring the solution containing 4,4-diphenylmethane diisocyanate, add the solution in which monoamine is dissolved, and then continue to stir at 100-120°C for 30 minutes to allow the reaction to generate a diurea compound in the base oil.
[0198] Add inorganic bismuth or organic bismuth without sulfur component and antioxidant to it according to the compounding ratio shown in Table 1-2, and then stir at 100-120°C for 10 minutes. Thereafter, it was cooled and homogenized using triple rollers to obtain a grease composition.
[0199] In Table 1-2 and Table 1-3, the alkyl di...
Embodiment 1-11 and Embodiment 1-12
[0208] Add Li-12-hydroxystearate to the base oil shown in Table 1-2, and heat to dissolve at 200°C while stirring. Furthermore, each compounding ratio is shown in Table 1-2. Then cool, add inorganic bismuth or organic bismuth without sulfur component and antioxidant according to the mixing ratio shown in Table 1-2, use triple rollers to homogenize, and prepare a grease composition. For this grease composition, the high-temperature high-speed test 1 and the rapid acceleration and deceleration test 2 were performed in the same manner as in Examples 1-6. However, considering the heat resistance of Li soap grease, the high temperature and high speed test 1 was carried out at 150°C.
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