Amidation of ester functionalized hydrocarbon polymers
First Claim
1. A process for preparing a polymeric amide which comprises the steps of:
- (A) reacting a mixture of (1) functionalized hydrocarbon polymer containing ester functional groups comprising at least one member selected from the group consisting of(i) substituted alkyl ester functional groups of formula (I);
##STR6## wherein Ak is a substituted, linear or branched C2 to C10 alkyl group containing at least one electron withdrawing substituent group, and(ii) aryl ester functional groups of formula (II);
##STR7## wherein Ar is an aryl group selected from an aromatic radical or a substituted aromatic radical,wherein at least 50 mole % of the ester functional groups are neo ester functional groups, the hydrocarbon polymer having a number average molecular weight of at least about 500 prior to functionalization, and (2) an amine having at least one reactive --NH2 moiety, for a time and under conditions sufficient to form amide groups; and
(B) removing from the mixture during step (A) hydroxy compound released from the ester functional groups in forming the amide groups, the released hydroxy compound having a pKa of less than 12.
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Abstract
The present invention is directed to a process for preparing a polymeric amide which comprises the steps of:
(A) reacting a mixture of (i) functionalized hydrocarbon polymer containing ester functional groups comprising at least one member selected from the group consisting of substituted alkyl ester functional groups, the substituted alkyl moiety containing at least one electron withdrawing substituent group, and aryl ester functional groups, the hydrocarbon polymer having a number average molecular weight of at least about 500 prior to functionalization, and (ii) an amine having at least one reactive --NH2 moiety, for a time and under conditions sufficient to form amide groups; and
(B) removing from the mixture during step (A) hydroxyl compound released from the ester functional groups in forming the amide groups.
The polymeric amides so produced are useful as fuel additives (e.g., detergents) and lubricating oil additives (e.g., dispersants).
70 Citations
20 Claims
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1. A process for preparing a polymeric amide which comprises the steps of:
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(A) reacting a mixture of (1) functionalized hydrocarbon polymer containing ester functional groups comprising at least one member selected from the group consisting of (i) substituted alkyl ester functional groups of formula (I);
##STR6## wherein Ak is a substituted, linear or branched C2 to C10 alkyl group containing at least one electron withdrawing substituent group, and(ii) aryl ester functional groups of formula (II);
##STR7## wherein Ar is an aryl group selected from an aromatic radical or a substituted aromatic radical,wherein at least 50 mole % of the ester functional groups are neo ester functional groups, the hydrocarbon polymer having a number average molecular weight of at least about 500 prior to functionalization, and (2) an amine having at least one reactive --NH2 moiety, for a time and under conditions sufficient to form amide groups; and (B) removing from the mixture during step (A) hydroxy compound released from the ester functional groups in forming the amide groups, the released hydroxy compound having a pKa of less than 12. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification