Process of preparation of an additive and its use

摘要: This invention relates to a process for preparing an additive comprising the steps of: (1) reacting polymer derived from of olefin containing 2 8 carbon atoms with acylating agent form acylated polymer; and (2) step in medium substantially free sulphur with: (a) ammonia or amine succinimide product; (b) water hydrolysed product, wherein mole ratio is 0.3:1 1.6:1. The further compositions its use.