Heat activated detergents, fuels including such detergents and methods of use

A liquid fuel composition comprising:

• a liquid fuel and an effective amount of a heat activated detergent additive of the following formula:
• wherein X is hydrogen or a masking group (MG) with at least one X being MG,
• wherein MG is selected from the group consisting of fluorenylmethoxy carbonyl, phenyl carbamate, t-butyl carbamate, benzyl-carbamate, 2,2,6,6-tetramethylpiperidin-1-yloxycarbonyl, and combinations thereof,
• wherein CG is a connecting group selected from the group consisting of a dialkyl group, a carbamate group, an aromatic group, a phenolic group, and a polyethylamine group, and wherein m is an integer ranging from 5 to 30.

A method for improving intake valve and injector cleanliness of an engine for a vehicle utilizing a liquid fuel composition comprising the following:

• providing to the vehicle a liquid fuel composition comprising a liquid fuel including an effective amount of a heat activated detergent additive of the following formula.
• wherein X is hydrogen or a masking group (MG) with at least one X being MG,
• wherein MG is selected from the group consisting of fluorenylmethoxy carbonyl, phenyl carbamate, t-butyl carbamate, benzyl-carbamate, 2,2,6,6-tetramethylpiperidin-1-yloxycarbonyl, and combinations thereof,
• wherein CG is a connecting group selected from the group consisting of a dialkyl group, a carbamate group, an aromatic group, a phenolic group, and a polyethylamine group, and
• wherein m is an integer ranging from 5 to 30,
• injecting the liquid fuel composition into the engine and combusting the liquid fuel composition, and
• measuring the amount of deposits on the engine valves and the engine injectors,
• wherein the amount of deposit build-up on the engine intake valves (intake valve deposits) are decreased by 10% to 100% compared to a comparable liquid fuel not including the heat activated detergent additive.

A heat activated fuel detergent comprising a hydrocarbylpoly(oxyalkylene) polymeric backbone of the following formula:

• wherein X is hydrogen or a masking group (MG) with at least one X being MG,
• wherein MG is selected from the group consisting of fluorenylmethoxy carbonyl, phenyl carbamate, t-butyl carbamate, benzyl-carbamate, 2,2,6,6-tetramethylpiperidin-1-yloxycarbonyl group type, and combinations thereof,
• wherein CG is a connecting group selected from the group consisting of a dialkyl group, a carbamate group, an aromatic group, a phenolic group, and a polyethylamine group type, and
• wherein m is an integer ranging from 5 to 50,
• wherein R3 is a hydrocarbyl group including from 1 to 30 carbon atoms, and
• wherein R4 is a hydrocarbyl group including from 1 to 6 carbon atoms.

A liquid fuel composition comprising:

• a liquid fuel and an effective amount of a heat activated detergent additive of the following formula:
• wherein X is hydrogen or a masking group (MG) with at least one X being MG,
• wherein MG is selected from the group consisting of fluorenylmethoxy carbonyl, phenyl carbamate, t-butyl carbamate, benzyl-carbamate, 2,2,6,6-tetramethylpiperidin-1-yloxycarbonyl group type, and combinations thereof,
• wherein CG is a connecting group selected from the group consisting of a dialkyl group, a carbamate group, an aromatic group, a phenolic group, and a polyethylamine group type, and
• wherein m is an integer ranging from 5 to 50,
• wherein R3 is a hydrocarbyl group including from 1 to 30 carbon atoms, and
• wherein R4 is a hydrocarbyl group including from 1 to 6 carbon atoms.

A method for improving intake valve and injector cleanliness of an engine for a vehicle utilizing a liquid fuel composition comprising the following:

• providing to the vehicle a liquid fuel composition comprising a liquid fuel including an effective amount of a heat activated detergent additive of the following formula:
• wherein X is hydrogen or a masking group (MG) with at least one X being MG,
• wherein MG is selected from the group consisting of fluorenylmethoxy carbonyl, phenyl carbamate, t-butyl carbamate, benzyl-carbamate, 2,2,6,6-tetramethylpiperidin-1-yloxycarbonyl group type, and combinations thereof,
• wherein CG is a connecting group selected from the group consisting of a dialkyl group, a carbamate group, an aromatic group, a phenolic group, and a polyethylamine group type, and
• wherein m is an integer ranging from 5 to 30,
• wherein R3 is a hydrocarbyl group including from 1 to 30 carbon atoms, and
• wherein R4 is a hydrocarbyl group including from 1 to 6 carbon atoms
• injecting the liquid fuel composition into the engine and combusting the liquid fuel composition, and
• measuring the amount of deposits on the engine valves and the engine injectors,
• wherein the amount of deposit build-up on the engine intake valves (intake valve deposits) are decreased by 10% to 100% compared to a comparable liquid fuel not including the heat activated detergent additive.