Lubricating grease composition and preparation method thereof
A grease composition and component technology, which is applied in the field of polyurea grease composition and preparation with low friction coefficient, can solve the problems of poor effect and reduce friction, etc., achieve low friction coefficient, prolong service life, and reduce wear Effect
Inactive Publication Date: 2012-12-19
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology
US patent US 4840740 provides a polyurea grease that can reduce friction, which can be used in high temperature conditions, but the effect of reducing friction is not good
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Embodiment Construction
[0025] The present invention will be further elaborated below by specific examples.
[0026] Embodiment 1-6 and comparative example preparation method:
[0027] Mix all the base oil evenly and divide it into two equal parts, add the organic amine to one part of the base oil, heat to 80-100°C and keep stirring until the organic amine is completely melted and evenly dispersed in the base oil to form an organic Amine oil solution; add diisocyanate to the remaining base oil, heat to 80-100°C and keep stirring until the isocyanate is completely melted and evenly dispersed in the base oil to form an isocyanate oil solution; organic amine oil solution and The oil solution of diisocyanate is mixed and fully stirred. At this time, the reaction of organic amine and diisocyanate releases heat, and the temperature of the material rises to 150-180°C. Keep stirring at this temperature for 2-4 hours to make the organic amine and diisocyanate The isocyanate is completely reacted; after the r...
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Abstract
The invention relates to a lubricating grease composition and a preparation method thereof The lubricating grease comprises, using total weight of the lubricating grease as reference, (1) 8 to 15 % of polyurea densifier, (2) 75 to 85 % of base oil, and (3) 5 to 15 % of an additive, wherein the additive comprises (a) 0.5 to 5 % of dialkyl molybdenum dithiocarbamate, (b) 0.5 to 5 % of dithiocarbamic acid oxysulfide molybdenum, (c) 0.5 to 5 % of zinc dialkyl dithiophosphate, and (d) 0.5 to 5 % of sulfurized lard. Due to adding a high-efficiency antifriction additive combination, the polyurea lubricating grease has low friction coefficient, wherein the friction coefficient of the lubricating grease is in a range of 0.05 to 0.07 through an experiment of a SRV friction and wear testing machine and is far lower than that of general antiwear lubricating grease, and thus is especially suitable for harsh conditions of high temperature and high load and can prolong service life of the equipment.
Description
technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to a polyurea lubricating grease composition with low friction coefficient and a preparation method. Background technique [0002] With the improvement of machining accuracy of mechanical equipment, many mechanical equipment have put forward higher requirements for grease. In many precision mechanical equipment, due to the improper use of grease in the friction parts, excessive wear of the mechanical equipment has been caused. If it is too short, it will directly affect the normal function of the device. Low-friction grease can effectively reduce wear, prolong the service life of mechanical parts, and ensure the normal use of equipment. [0003] Common greases are usually divided into calcium-based greases, lithium-based greases, lithium-complex greases and polyurea greases according to the type of thickener. With the development of modern industry, mechanical equipmen...
Claims
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IPC IPC(8): C10M169/06C10M177/00
Inventor 韩鹏刘建龙刘亚春冯强吴宝杰
Owner CHINA PETROLEUM & CHEM CORP