| 摘要 |
<p>The invention relates to a detergent-dispersant additive, consisting of 50...60%, by weight polyisobutenylsuccinic anhydride derivatives, chosen from among polyisobutenylsuccinimide and the ester of the polyisobutenylsuccinic anhydride with pentaerythritol and 40...50%, by weight mineral oil and to the process for obtaining the same, consisting of the reaction of 80...90%, by weight polyisobutene with numeral average molecular mass ranging between 500 and 5000 g/mol, there having a percentage of double terminal connections, preferably over 85% with 8...16%, by weight, of maleic anhydride, in the presence of 1...7%, by weight a peroxide-type radicalic initiating agent and 0.1...1%, by weight acid anhydride, at a temperature of 140...160A Celsius, for 6...9 h, the reaction being followed by the imidization or esterification of the polyisobutenylsuccinic anhydride.</p> |
