Lubricating grease and preparation method thereof

Abstract

The invention relates to a lubricating grease, comprising 40-95 wt% of a lubricating base oil, 1-59 wt% of a composite zirconium based densifier and 1-59 wt% of bipolyurea; and the composite zirconium based densifier is a compound zirconium soap generated from reaction of higher aliphatic acid, aromatic acid, water and zirconium alkoxide. The invention also relates to a preparation method of the lubricating grease. The method comprises the following steps: subjecting the zirconium alkoxide, higher aliphatic acid and aromatic acid to a first contact reaction in lubricating base oil at 60-120 DEG C; then subjecting the mixture obtained from the first contact reaction and water to a second contact reaction at 85-100 DEG C, and heating the products obtained from the second contact reaction for dehydration; and introducing the bipolyurea into the obtained reaction products. The lubricating grease provided by the invention has high drop point, excellent colloidal stability, and excellent extreme pressure wear resistance and ball bearing lubrication life.

Description

technical field

[0001] The invention relates to a lubricating grease and a preparation method of the lubricating grease. Background technique

[0002] As a transition metal element, zirconium belongs to group IVB and is located in the fifth period. Zirconium-containing compounds have excellent lubricating effects and are often used as lubricating additives. For example, CN101113382A and JP1973038444 disclose that zirconium oxides are used as lubricant additives to improve wear resistance; WO2007143414 and US20060063682 disclose that zirconium tetrafluoride can be used as a Additives become one of the components of the lubricant; US20060254823 discloses a lubricant containing zirconium 2-ethylhexanoate, which exhibits good heavy load and anti-wear properties; US20050043189 discloses fluorozirconate such as fluorine Aluminum zirconate can be used in lubricants as an oxidation inhibitor; DE102004021812 discloses that inorganic salts such as zirconium carbonate, zirconium sulfo...

Examples

preparation example Construction

[0034] The present invention also provides a method for preparing lubricating grease, the method comprising: first contacting alkoxy zirconium, higher fatty acid and aromatic acid in lubricating base oil in reaction kettle A at 60-120°C reaction; then, at 85-100°C, the mixture obtained after the first contact reaction is subjected to a second contact reaction with water, and the product obtained after the second contact reaction is subjected to temperature rise and dehydration; and then Step (1) or (2) below:

[0035] (1) Mix the product of reactor A with diisocyanate, then react the resulting mixture with monoamine, and raise the temperature of the obtained mixture to 200-220°C for refining;

[0036] (2) React the diisocyanate dissolved in the lubricating base oil with the monoamine in the reactor B, then combine the reaction mixture with the product of the reactor A, and raise the temperature of the obtained mixture to 200-220°C for refining system;

[0037] Wherein, the m...

Embodiment 1

[0061] This example is used to illustrate the grease of the present invention and its preparation method.

[0062] Raw material components: zirconium isopropoxide isopropanol complex (9.33kg); 12-hydroxystearic acid (4.80kg); phthalic acid (2.60kg); octadecylamine (1.5kg); '-Diphenylmethane diisocyanate (MDI, 0.7 kg); HVI500SN base oil (40 kg).

[0063] Add 9.33kg isopropoxide zirconium isopropanol complex (purchased from Sigma-Aldrich company) and 9kg of HVI500SN base oil (100 ℃ Kinematic viscosity is 11mm 2 / s, purchased from ExxonMobil Chemical Company), stirred, heated to 80°C, added 4.80kg of 12-hydroxystearic acid (purchased from Tongliao Weining Chemical Co., Ltd.), and reacted at constant temperature for 20 minutes; 2.60kg of phthalic acid, heat up to 105°C, react for 30 minutes, add 6kg of HVI500SN base oil, cool down to 95°C, add 1kg of water, and react at constant temperature for 20 minutes; heat up to 110°C under stirring for dehydration, after dehydration Stand...

Embodiment 2

[0073] This example is used to illustrate the grease of the present invention and its preparation method.

[0074] Raw material components: zirconium ethylate (6.72kg); stearic acid (4.55kg); terephthalic acid (2.66kg); octadecylamine (1.5kg); MDI (0.7kg); (110kg).

[0075] Add 6.72kg of zirconium ethylate (purchased from Sigma-Aldrich company) and 20kg of polyalpha-olefin synthetic oil PAO10 (100 ℃ kinematic viscosity is 10mm 2 / s, purchased from ExxonMobil Chemical Company), stirred, heated to 80°C, added 4.55kg of stearic acid, and reacted at constant temperature for 60 minutes; added 2.66kg of terephthalic acid, heated to 105°C and reacted for 30 minutes, Add 20kg of poly-α-olefin synthetic oil PAO 10, cool down to 95°C, add 1kg of water, and react at constant temperature for 20 minutes; heat up to 110°C under stirring for dehydration, after dehydration, add 0.7kg of MDI, and continue stirring for 4 Minutes, then add 1.5kg of octadecylamine under stirring, and continue ...

technical field

[0001] The invention relates to a lubricating grease and a preparation method of the lubricating grease. Background technique

[0002] As a transition metal element, zirconium belongs to group IVB and is located in the fifth period. Zirconium-containing compounds have excellent lubricating effects and are often used as lubricating additives. For example, CN101113382A and JP1973038444 disclose that zirconium oxides are used as lubricant additives to improve wear resistance; WO2007143414 and US20060063682 disclose that zirconium tetrafluoride can be used as a Additives become one of the components of the lubricant; US20060254823 discloses a lubricant containing zirconium 2-ethylhexanoate, which exhibits good heavy load and anti-wear properties; US20050043189 discloses fluorozirconate such as fluorine Aluminum zirconate can be used in lubricants as an oxidation inhibitor; DE102004021812 discloses that inorganic salts such as zirconium carbonate, zirconium sulfo...

Examples

preparation example Construction

[0034] The present invention also provides a method for preparing lubricating grease, the method comprising: first contacting alkoxy zirconium, higher fatty acid and aromatic acid in lubricating base oil in reaction kettle A at 60-120°C reaction; then, at 85-100°C, the mixture obtained after the first contact reaction is subjected to a second contact reaction with water, and the product obtained after the second contact reaction is subjected to temperature rise and dehydration; and then Step (1) or (2) below:

[0035] (1) Mix the product of reactor A with diisocyanate, then react the resulting mixture with monoamine, and raise the temperature of the obtained mixture to 200-220°C for refining;

[0036] (2) React the diisocyanate dissolved in the lubricating base oil with the monoamine in the reactor B, then combine the reaction mixture with the product of the reactor A, and raise the temperature of the obtained mixture to 200-220°C for refining system;

[0037] Wherein, the m...

Embodiment 1

[0061] This example is used to illustrate the grease of the present invention and its preparation method.

[0062] Raw material components: zirconium isopropoxide isopropanol complex (9.33kg); 12-hydroxystearic acid (4.80kg); phthalic acid (2.60kg); octadecylamine (1.5kg); '-Diphenylmethane diisocyanate (MDI, 0.7 kg); HVI500SN base oil (40 kg).

[0063] Add 9.33kg isopropoxide zirconium isopropanol complex (purchased from Sigma-Aldrich company) and 9kg of HVI500SN base oil (100 ℃ Kinematic viscosity is 11mm 2 / s, purchased from ExxonMobil Chemical Company), stirred, heated to 80°C, added 4.80kg of 12-hydroxystearic acid (purchased from Tongliao Weining Chemical Co., Ltd.), and reacted at constant temperature for 20 minutes; 2.60kg of phthalic acid, heat up to 105°C, react for 30 minutes, add 6kg of HVI500SN base oil, cool down to 95°C, add 1kg of water, and react at constant temperature for 20 minutes; heat up to 110°C under stirring for dehydration, after dehydration Stand...

Embodiment 2

[0073] This example is used to illustrate the grease of the present invention and its preparation method.

[0074] Raw material components: zirconium ethylate (6.72kg); stearic acid (4.55kg); terephthalic acid (2.66kg); octadecylamine (1.5kg); MDI (0.7kg); (110kg).

[0075] Add 6.72kg of zirconium ethylate (purchased from Sigma-Aldrich company) and 20kg of polyalpha-olefin synthetic oil PAO10 (100 ℃ kinematic viscosity is 10mm 2 / s, purchased from ExxonMobil Chemical Company), stirred, heated to 80°C, added 4.55kg of stearic acid, and reacted at constant temperature for 60 minutes; added 2.66kg of terephthalic acid, heated to 105°C and reacted for 30 minutes, Add 20kg of poly-α-olefin synthetic oil PAO 10, cool down to 95°C, add 1kg of water, and react at constant temperature for 20 minutes; heat up to 110°C under stirring for dehydration, after dehydration, add 0.7kg of MDI, and continue stirring for 4 Minutes, then add 1.5kg of octadecylamine under stirring, and continue ...

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