| 摘要 |
1533819 Polymer-substituted acids and derivatives thereof LUBRIZOL CORP 3 June 1977 [11 June 1976] 23733/77 Heading C3P A two-step process for producing polymersubstituted acids and derivatives thereof, especially polyisobutenyl succinic anhydride, comprises (1) reacting an alkylating hydrocarbon polymer with 30-90% of the total amount of acidic reagent selected from maleic acid, fumaric acid, itaconic acid or an anhydride or ester thereof in the presence of 0-0À4 mole of Cl 2 per mole of acidic reagent, and subsequently (2) introducing the remainder of the acidic reagent and continuing the reaction in the presence of added Cl 2 in amount up to 4 moles per mole of added acidic reagent. |
