Patent ID: 7763681
Filing Date: 2010-07-27
Classification: C08F

Abstract:
1. A process for the preparation of polyalkenyl acylating agents which comprises: a. thermally reacting at a temperature higher than 180° C. a reactive polyalkene having a number average molecular weight Mn ranging from 500 to 5,000 and having a content of terminal vinylidene groups greater than or equal to 30%, with an enophile, under conditions consisting essentially of a temperature ranging from 180° C. to 300° C. and atmospheric pressure or a pressure ranging from 0.1 to 1 MPa in an inert gas, for a time sufficient for conversion of the terminal vinylidene groups from 15 to 90% before adding a reaction accelerator to the reaction mixture; b. completing the reaction always under heat after adding a reaction accelerator consisting of a Lewis acid selected from a tin, zinc, aluminum or titanium halide having the formula MX