Novel carboxylic acid acylating agents, derivatives thereof, concentrate and lubricant compositions containing the same, and processes for their preparation

A lubricating composition comprising a major amount of oil of lubricating viscosity and a minor amount of one or more carboxylic derivative compositions produced by reacting at least one substituted acylating composition with a reactant selected from the group consisting of (a) amine characterized by the presence within its structure of at least one H--N<

• group, (b) alcohol, (c) reactive metal or reactive metal compound, and (d) a combination of two or more of any of (a) through (c), the components of (d) being reacted with said one or more substituted acylating compositions simultaneously or sequentially in any order, wherein said one or more substituted acylating compositions are prepared by heating at a temperature of at least about 140.degree. C.:
• (A) Polyalkene characterized by a Mn value of 1300 to about 5000 and a Mw/Mn value of about 1.5 to about 4,
• (B) One or more acidic reactants of the formula ##STR39## wherein X and X' are the same or different provided at least one of X and X' is such that the substituted acylating compositions can function as carboxylic acylating agents,
• (C) Chlorine
• wherein the mole ratio of (A):(B) is such that there is at least 1.3 moles of (B) for each mole of (A) where the number of moles of (A) is the quotient of the total weight of (A) divided by the value of Mn, and the amount of chlorine employed is such as to provide at least about 0.2 mole of chlorine for each mole of (B) to be reacted with (A), said substituted acylating compositions being characterized by at least 1.3 groups derived from (B) for each equivalent weight of the substituent groups derived from (A).

A lubricating composition comprising a major amount of oil of lubricating viscosity and a minor amount of at least one substituted acylating composition prepared by heating at a temperature of at least about 140.degree. C.:

• (A) Polyalkene characterized by Mn value of 1300 to about 5000 and a Mw/Mn value of about 1.5 to about 4,
• (B) One or more acidic reactants of the formula ##STR43## wherein X and X' are the same or different provided at least one of X and X' is such that the substituted acylating compositions can function as carboxylic acylating agents,
• (C) Chlorine
• wherein the mole ratio of (A):(B) is such that there is at least 1.3 moles of (B) for each mole of (A) where the number of moles of (A) is the quotient of the total weight of (A) divided by the value of Mn, and the amount of chlorine employed is such as to provide at least about 0.2 mole of chlorine for each mole of (B) to be reacted with (A), said substituted acylating compositions being characterized by the presence within its structure of an average of at least 1.3 groups derived from (B) for each equivalent weight of the substituent groups derived from (A).

A method for increasing the viscosity index of a lubricating oil comprising adding to said oil a minor, viscosity-index-improving amount of one or more carboxylic derivative compositions produced by reacting at least one substituted acylating composition with a reactant selected from the group consisting of (a) amine characterized by the presence within its structure of at least one H--N<

• group, (b) alcohol, (c) reactive metal or reactive metal compound, and (d) a combination of two or more of any of (a) through (c), the components of (d) being reacted with said one or more substituted acylating compositions simultaneously or sequentially in any order, wherein said one or more substituted acylating compositions are prepared by heating at a temperature of at least about 140.degree. C.:
• (A) Polyalkene characterized by a Mn value of 1300 to about 5000 and a Mw/Mn value of about 1.5 to about 4,
• (B) One or more acidic reactants of the formula ##STR45## wherein X and X' are the same or different provided at least one of X and X' is such that the substituted acylating compositions can function as carboxylic acylating agents,
• (C) Chlorine
• wherein the mole ratio of (A):(B) is such that there is at least 1.3 moles of (B) for each mole of (A) where the number of moles of (A) is the quotient of the total weight of (A) divided by the value of Mn, and the amount of chlorine employed is such as to provide at least about 0.2 mole of chlorine for each mole of (B) to be reacted with (A), said substituted acylating compositions being characterized by at least 1.3 groups derived from (B) for each equivalent weight of the substituent groups derived from (A).