| 主权项 |
1. A process for producing a lubricant additive, wherein
a)
i) a dimeric thiadiazole compound, especially a bis(2-alkyl-1,3,4-thiadiazolyl) 5,5′-disulfide derivative of the formula (I) and/or a dimeric 2,5-dimercapto-1,3,4-thiadiazolethiol derivative of the formula (II) where n in the formulae (I) and (II) is 1 or 2 andR1 and R2 are each independently hydrogen, linear or branched alkyl groups having 1 to 12 carbon atoms, especially thioalkyl groups having 1 to 12 carbon atoms, aromatic radicals or heteroaromatic radicals,ii) is dissolved in a polyamine or polyamine derivative of the formula (III)
R1-(CH2-CH2-NH)n-CH2-CH2-R2 (III)where n in formula (III) is an integer from 1 to 15, especially an integer from 3 to 8, andR1 and R2 are each independently hydrogen, —NH2, linear or branched alkyl groups having 1 to 12 carbon atoms or a modified or unmodified succinimide group, andiii) a compound of the formula (IV) in which n is an integer from 1 to 8, especially an integer from 3 to 8, preferably 6, is added to the solution obtained, or b)
i) a dimeric thiadiazole compound, especially a bis(2-alkyl-1,3,4-thiadiazolyl) 5,5′-disulfide derivative of the formula (I) and/or a dimeric 2,5-dimercapto-1,3,4-thiadiazolethiol derivative of the formula (II) where n in the formulae (I) and (II) is 1 or 2 andR1 and R2 are each independently hydrogen, linear or branched alkyl groups having 1 to 12 carbon atoms, especially thioalkyl groups (—SR) having 1 to 12 carbon atoms, aromatic radicals or heteroaromatic radicals,ii) is dissolved in a polyol, especially a polyether polyol having a high propylene oxide content and/or a triglyceride having a hydroxy fatty acid component, andiii) a hydrophobic phenol derivative and/or unsaturated fatty alcohol is added to the solution obtained. |
