| abstract |
The present invention relates to a process for the preparation of Mannich adducts containing polyisobutene phenol by DOLLAR A a) alkylation of a phenol with highly reactive polyisobutene at a temperature below about 50 ° C. in the presence of an alkylation catalyst; DOLLAR A b) reaction of the reaction product from a) with DOLLAR A formaldehyde, an oligomer or a polymer of formaldehyde and DOLLAR A at least one amine which has at least one secondary amino function and no primary amino function, DOLLAR A or DOLLAR A c) reaction of the reaction product from a) with at least one adduct of at least one amine which has at least one secondary or primary amino function and formaldehyde, an oligomer of formaldehyde, a polymer of formaldehyde or a formaldehyde equivalent, DOLLAR A the Mannich adducts obtainable by this process, the use of the Mannich adducts as detergent additives in fuel and lubricant compositions, and also additive concentrates, fuel composition and lubricant compositions, and also additive concentrates, fuel compositions and lubricant compositions, which contain these Mannich adducts. |