The use of a copolymer of polyalkylene alkenyl ether and maleic anhydride, maleic acid, or a salt or ester of maleic acid as a lubricating agent.
申请人:NIPPON OIL AND FATS COMPANY, LIMITED
公开号:EP0399239A1
公开(公告)日:1990-11-28
A lubricating oil comprising a copolymer of monomers comprising as essential ingredients a compound represented by formula (1) and one of maleic anhydride, maleic acid, a salt of maleic acid, and an ester of maleic acid
where Z represents a residue of a compound having from 2 to 8 hydroxyl groups; AO represents one or more kinds of oxyalkylene groups each having from 2 to 18 carbon atoms, provided that in the case of two or more kinds of oxyalkylene groups, the oxyalkylene groups are linked to one another in either a block or a random arrangement; R represents an alkenyl group having from 2 to 5 carbon atoms; R¹ represents a hydrocarbon or acyl group having from 1 to 24 carbon atoms; and a≧0, b≧0, c≧0, ℓ is a positive integer, and m and n independently are 0 or a positive integer, provided that ℓ + m + n = 2 to 8, n/(ℓ + m) ≦ 1/2, and aℓ + bm + cn = 1 to 1,000.
一种润滑油,由单体的共聚物组成,单体的基本成分包括式(1)所代表的化合物和马来酸酐、马来酸、马来酸的盐和马来酸的酯中的一种
其中 Z 代表具有 2 至 8 个羟基的化合物残基;AO 代表一种或多种氧亚烷基,每种氧亚烷基具有 2 至 18 个碳原子,条件是在两种或多种氧亚烷基的情况下,氧亚烷基以嵌段或无规排列方式相互连接;R 代表具有 2 至 5 个碳原子的烯基; R¹ 代表具有 1 至 24 个碳原子的烃基或酰基;且 a≧0、b≧0、c≧0、ℓ 为正整数,m 和 n 独立地为 0 或正整数,条件是 ℓ + m + n = 2 至 8,n/(ℓ + m) ≦ 1/2,且 aℓ + bm + cn = 1 至 1,000。