Antioxidant dispersant polymer dendrimer
First Claim
1. A lubricating composition comprising a major portion of a lubricating oil and a minor, effective dispersant, amount of a reaction product by a process comprising the following steps which can be repeated any desired number of times, said process comprising:
- (a) reacting an amine or polyamine with an alkyl acrylate in the presence of an alkyl alcohol to produce a first generation polyamine ester dendrimer;
(b) reacting said first generation polyamine ester dendrimer with an amine or a polyamine to produce a first generation polyamidoamine dendrimer;
(c) reacting said first generation polyamidoamine dendrimer with an alkyl acrylate to produce a 12-branch second generation polyamidoamine ester dendrimer;
(d) reacting said 12-branch second generation polyamidoamine ester dendrimer with an amine or polyamine to produce a 12-branch second generation polyamidoamine dendrimer; and
(e) reacting said 12-branch second generation polyamidoamine dendrimer with a polyisobutenyl succinimide acid anhydride to produce the product lubricant, a 12-polyisobutenyl succinicimide-12-polyamidoamine dendrimer polymer.
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Abstract
An antioxidant, dispersant lubricating composition comprises the product produced by first reacting an alkyl acrylate with an amine to produce an intermediate product, a first generation polyamine ester dendrimer which is then treated with an amine to produce a first generation polyamidoamine dendrimer which is then reacted with an acrylate to produce a second generation polyamidoamine ester dendrimer which with an amine is converted to a second generation polyamidoamine dendrimer which is then reacted with a polyisobutenyl succinic acid anhydride to produce the reactant product a polyisobutenyl succinimide-polyamidoamine dendrimer polymer.
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Citations
12 Claims
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1. A lubricating composition comprising a major portion of a lubricating oil and a minor, effective dispersant, amount of a reaction product by a process comprising the following steps which can be repeated any desired number of times, said process comprising:
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(a) reacting an amine or polyamine with an alkyl acrylate in the presence of an alkyl alcohol to produce a first generation polyamine ester dendrimer; (b) reacting said first generation polyamine ester dendrimer with an amine or a polyamine to produce a first generation polyamidoamine dendrimer; (c) reacting said first generation polyamidoamine dendrimer with an alkyl acrylate to produce a 12-branch second generation polyamidoamine ester dendrimer; (d) reacting said 12-branch second generation polyamidoamine ester dendrimer with an amine or polyamine to produce a 12-branch second generation polyamidoamine dendrimer; and (e) reacting said 12-branch second generation polyamidoamine dendrimer with a polyisobutenyl succinimide acid anhydride to produce the product lubricant, a 12-polyisobutenyl succinicimide-12-polyamidoamine dendrimer polymer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An antioxidant/dispersant useful in a lubricant, of the formula:
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m - polyisobutenyl-succinimide-n-polyamidoamine dendrimer polymer wherein m=1-1024 and n=4-1024. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification