Dispersant - anti-oxidant additive and lubricating oil composition containing same
AssigneeTexaco Inc.
InventorsNicholas Benfarmeo, Theodore E. Nalesnik
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Abstract
An additive composition comprising a graft and amine-derivatized polymer having an average molecular weight ranging from about 300 to 3500 which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with an amino-aromatic polyamine compound from the group consisting of an N-arylphenylenediamine, an aminothiazole, an aminocarbazole, an amino-indazolinone, an aminomercaptotriazole and an aminoperimidine to form said graft and amine-derivatized copolymer, and a lubricating oil composition containing same are provided.
Claims22
An additive composition prepared by the steps comprising:
- A) reacting a homopolymer or a copolymer prepared from an alpha-monoolefin having from 2 to 10 carbon atoms and optionally a polyene selected from non-conjugated dienes and trienes said homopolymer or copolymer having an average molecular weight ranging from about 300 to 3500 with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure, and
- B) reacting said reaction intermediate in (A) with 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 hydrogen, R.sup.2 is NH.sub.2, --(NH--(CH.sub.2).sub.n --).sub.m --NH.sub.2 and R.sup.3 is alkyl, alkenyl, alkoxyl, aralkyl, alkaryl having 4 to 24 carbon atoms,
- b) an aminothiazole from the group consisting of aminothiazole, aminobenzothiazole, aminobenzothiadiazole and aminoalkylthiazole,
- c) 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,
- d) an amino-indazolinone represented by the formula:
- ##STR13## in which R is hydrogen or an alkyl radical having from 1 to 14 carbon atoms
- e) an aminomercaptotriazole represented by the formula:
- ##STR14## f) and an aminoperimidine represented by the formula:
- ##STR15## in which R represents hydrogen or an alkyl, alkenyl, or alkoxyl radical having from 1 to 8 carbon atoms.
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 composition prepared by the steps comprising:
- A) reacting a homopolymer or a copolymer prepared from an alpha-monoolefin having from 2 to 10 carbon atoms and, optionally, a polyene selected from non-conjugated dienes and trienes having an average molecular weight ranging from about 300 to 3500 with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure, and
- B) reacting said reaction intermediate in (A) with an amino-aromatic polyamine compound selected from the group consisting of:
- (1) an N-arylphenylenediamine represented by the formula:
- ##STR16## in which R.sup.1 is hydrogen, R.sup.2 is --NH.sub.2, and R.sub.3 is alkyl, aralkyl, and alkaryl of from 4 to 24 carbon atoms;
- (2) an aminothiazole from the group consisting of aminothiazole, aminobenzothiazole, aminobenzothiadiazole, and aminoalkylthiazole;
- (3) an aminocarbazole represented by the formula:
- ##STR17## in which R and R.sup.1 represent hydrogen or an alkyl or alkoxyl radical having from 1 to 14 carbon atoms;
- (4) an amino-indazolinone represented by the formula:
- ##STR18## in which R is hydrogen or an alkyl radical having from 1 to 14 carbon atoms;
- (5) an aminomercaptotriazole represented by the formula:
- ##STR19## (6) an aminoperimidine represented by the formula:
- ##STR20## in which R represents hydrogen or an alkyl, alkenyl or alkoxyl radical having from 1 to 14 carbon atoms.
Dependencies are inferred from the claim text.