Patent ID: 7988749
Filing Date: 2011-08-02
Classification: C08F,C10L,C10M

Abstract:
1. A process for the preparation of polyisobutenylphenol-containing Mannich adducts, comprising: a) alkylating a phenol with a polyisobutene having more than 70 mol % of vinylidene double bonds and a number average molecular weight of from 300 to 3000 to form an alkylation product, wherein the alkylating is carried out at a temperature of below about 50° C. in the presence of an alkylation catalyst; then b) reacting the alkylation product with at least one of formaldehyde, an oligomer of formaldehyde and a polymer of formaldehyde, and at least one amine which has at least one secondary amino function and no primary amino function; or c) reacting the alkylation product with at least one adduct of (i) at least one amine which has at least one secondary or primary amino function and (ii) at least one of formaldehyde, an oligomer of formaldehyde, a polymer of formaldehyde, and a formaldehyde equivalent; wherein the adduct reacted with the alkylation product is obtained by reacting the amine and at least one of the formaldehyde, the oligomer of formaldehyde, the polymer of formaldehyde and the formaldehyde equivalent, for at least 15 minutes at above +15° C. in the absence of the polyisobutenylphenol.