Adducts of low molecular weight PIB with low polydispersity and high vinylidene content
AssigneeTPC Group LLC
InventorsSohel K. Shaikh, Jennifer Leigh Sengstock
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Abstract
A PIB derivative suitable for use as a fuel additive or lubricant additive prepared from a reactive low molecular weight polyisobutylene composition comprising at least 50 mol percent alpha vinylidene terminated polyisobutylene molecules, the composition having a polydispersity of no more than 1.5 and a number average molecular weight of at least 500 Daltons and no more than 1000 Daltons. The derivative is selected from the group consisting of: alkyl hydroxyaromatic compounds; alkyl alkoxy aromatic compounds; polyisobutenylsuccinic anhydrides; polyisobutenylsuccinimides; PIB-amine compounds; sulfurized PIB compounds; and Mannich condensation products of an alkylated hydroxyaromatic compound.
Claims31
A PIB derivative suitable for use as a fuel additive or a lubricant additive prepared from a reactive low molecular weight polyisobutylene composition comprising at least 50 mol percent alpha vinylidene terminated polyisobutylene molecules, the composition having a number average molecular weight of no more than 1000 Daltons, wherein the polyisobutylene composition is prepared with a chain transfer agent having a molecular weight, Mn, lower than said polyisobutylene composition and the polyisobutylene composition is characterized in that the composition exhibits a low molecular weight relative maximum in its molecular weight distribution corresponding to the presence of said chain transfer agent and wherein the derivative is selected from the group consisting of:
- alkyl hydroxyaromatic compounds;
- alkyl alkoxy aromatic compounds;
- polyisobutenylsuccinic anhydrides;
- polyisobutenylsuccinimides;
- PIB-amine compounds;
- sulfurized PIB compounds;
- and Mannich condensation products of an alkylated hydroxyaromatic compound.
A PIB derivative suitable for use as a fuel additive or a lubricant additive prepared from a reactive low molecular weight polyisobutylene composition having a number average molecular weight of no more than 750 Daltons, and the following isomer content on a molar basis:
- 60-90% Alpha isomer content and 30-10% Beta isomer content,
- wherein the derivative is selected from the group consisting of:
- alkyl hydroxyaromatic compounds;
- alkyl alkoxy aromatic compounds;
- polyisobutenylsuccinic anhydrides;
- polyisobutenylsuccinimides;
- PIB-amine compounds;
- sulfurized PIB compounds;
- and Mannich condensation products of an alkylated hydroxyaromatic compound.
Dependencies are inferred from the claim text.