US 5,139,688 AGranted

Dispersant and antioxidant additive and lubricating oil composition containing same

AssigneeTexaco Inc.

InventorTheodore E. Nalesnik

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Abstract

An additive composition comprising an amine-derivatized oxidized copolymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 30 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 to C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene having a number average molecular weight ranging from about 5,000 to 500,000 which has been reacted with a formaldehyde compound and an amino-aromatic polyamine compound from the group consisting of an N-arylphenylenediamine, an aminocarbazoly, an aminomercaptotriazole, and an aminoperimidine to form said amine-derivatized oxidized copolymer and a lubricating oil composition containing same are provided.

Claims24

Dependent claims

An additive reaction product prepared by reacting a polymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 to C.sub.10 alphamonoolefin, and from about b 0 to 15 mole percent of said polyene and having a number average molecular weight ranging from about 5,000 to 500,000, with an oxygen-containing gas at an elevated temperature in the range of 100.degree. F. to 800.degree. F. to produce an oxidized polymer and reacting said oxidized polymer with a formaldehyde-yielding reactant and an amino-aromatic polyamine compound selected from the group consisting of:

a) an N-arylphenylenediamine represented by the formula:
##STR11## in which R.sup.1 is H, --NHaryl, --NHarylalkyl, a branched or straight chain radical having from 4 to 24 carbon atoms that can be alkyl, akenyl, alkoxyl, aralkyl alkaryl, hydroxyalkyl or aminoalkyl, R.sup.2 is --NH.sub.2, --(NH(CH.sub.2)--.sub.n --.sub.m NH.sub.2, --CH.sub.2 --aryl--NH.sub.2 in which n and m has a value from 1 to 10, R.sup.3 is alkyl, alkenyl, alkoxyl, aralkyl, alkaryl, having from 4 to 24 carbon atoms,
b) an aminocarbazole represented by the formula:
##STR12## in which R and R.sup.1 represent hydrogen or an alkyl or alkenyl radical having from 1 to 14 carbon atoms.
c) an amino-indazolinone represented by the formula:
##STR13## in which R is hydrogen or an alkyl radical having from 1 to 14 carbon atoms,
d) an aminomercaptotriazole represented by the formula:
##STR14## e) and an aminoperimidine represented by the formula:
##STR15## in which R represents hydrogen or an alkyl radical having from 1 to 14 carbon atoms.

6 more elements

A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount effective to impart dispersancy, and antioxidant properties to said oil of an additive reaction product prepared by reacting a polymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent ethylene, about 20 to 85 mole percent of said C.sub.3 to C.sub.20 alpha-monoolefin and from about 0 to 15 mole percent of said polyene, and having a number average molecular weight ranging from about 5,000 to 500,000, with an oxygen-containing gas at an elevated temperature in the range of 100.degree. F. to 800.degree. F. to produce an oxidized polymer a reacting said oxidized polymer with a formaldehyde-yielding reactant and an amino-aromatic polyamine compound selected from the group consisting of:

a) an N-arylphenylenediamine represented by the formula:
##STR16## in which R.sup.1 is H, --NHaryl, --NHarylalkyl, a branched or straight chain radical having from 4 to 24 carbon atoms that can be alkyl, akenyl, alkoxyl, aralkyl alkaryl, hydroxyalkyl or aminoalkyl, R.sup.2 is NH.sub.2, --(NH(CH.sub.2)--.sub.n)--.sub.m NH.sub.2, --CH.sub.2 --aryl--NH.sub.2 in which n and m has a value from 1 to 10, R.sup.3 is alkyl, alkenyl, alkoxyl, aralkyl, alkaryl, having from 4 to 24 carbon atoms,
b) an aminocarbazole represented by the formula:
##STR17## in which R and R.sup.1 represent hydrogen or an alkyl or alkenyl radical having from 1 to 14 carbon atoms,
c) an amino-indazolinone represented by the formula:
##STR18## in which R is hydrogen or an alkyl radical having from 1 to 14 carbon atoms,
d) an aminomercaptotriazole represented by the formula:
##STR19## e) and an aminoperimidine represented by the formula:
##STR20## in which R represents hydrogen or an alkyl radical having from 1 to 14 carbon atoms.

6 more elements

Dependencies are inferred from the claim text.