SYNTHESIS AND PERFORMANCE RESEARCH OF CYCLIC DICARBOXYLIC ACID MONOESTER ANTI-WEAR AGENT
Because of the ring tension of the cyclic structure,its low-temperature performance is better than that of long-chain alkanes.A series of monoester products were synthesized by esterification of several cyclic anhydride and alcohol(ethers)as raw materials,and their anti-wear effects and low-temperature performance were analyzed respectively.The research results showed that among the studied cyclic dicarboxylic acid monoester products,the methyl hexahydrophthalic anhydride(MHHPA)reacted with 2-Butoxyethanol(2-B)to prepare methyl hexahydrophthalic ethylene glycol butyl ether monoester(2-BM),which had both good anti-wear performance and low-temperature properties.With an additive amount of only 200 μg/g in ultra-low sulfur diesel,it can significantly improve the lubrication performance of diesel,reducing the average wear scar diameter(WSD)by 242 μm,decreasing the average friction coefficient by 51％and increasing the average oil film coverage by 10％.The freezing point of 2-BM is-42 ℃,which has a good application prospect at low-temperature conditions.
MHHPA2-butoxyethanolanti-wear agentanti-wear performancelow temperature performance
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