JPH0488094A - Additive composition for gasoline - Google Patents

Abstract

PURPOSE:To provide the subject composition capable of remarkably reducing deposits at the intake valves of engines for automobiles by compounding a specific benzylamine derivative, a polyoxyalkylene glycol (derivative) and a lubricant fraction as main components. CONSTITUTION:The objective composition comprises (A) a benzylamine derivative represented by the formula (R is alkyl derived from a polyolefin polymer having a mol.wt. of 500-4500; R' is alkylene; n is 1-10) and having a mol.wt. of 500-500, preferably 1000-3000, (B) a polyoxyalkylene glycol (derivative) having a mol.wt. of 500-5000. preferably 1000-3000, and (C) a lubricant fraction having a viscosity of 3-35mm<2>/S (100 deg.C) as main components.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a gasoline additive composition, and more particularly to a gasoline additive composition that can significantly reduce deposits in the intake valves of automobile engines.

[Conventional technology]

Conventionally, polyalkenylsuccinimide and hydroxypolyether polyamine have been known as cleaning agents for carburetors and engines in automobiles, and polyalkenylsuccinimide and oxy compounds are dispersed in organic solvents such as xylene as gasoline additive compositions. Alternatively, dissolved ones are also known.

[Problem to be solved by the invention]

The present invention relates to improvements in this type of gasoline additive composition, and in particular, it is an object of the present invention to provide a gasoline additive composition that can significantly reduce deposits in intake valves.

[Means to solve the problem]

The gasoline additive composition of the present invention comprises a benzylamine derivative having a molecular weight of 500 to 5000 represented by the following general formula, a polyoxyalkylene glycol or its derivative having a molecular weight of 500 to 5000, and a viscosity of 3 mm2/s -3
The main component is a lubricating oil fraction of 5 mm2/s (100°C).

General formula (wherein R is an alkyl group derived from a polyolefin polymer with a molecular weight of 500 to 4,500, R' is an alkylene group,
n represents an integer of 1 to 10. ) A method for producing the benzylamine derivative represented by the above general formula is, for example, by alkylating 2-hydroxybenzylamine with a polyolefin polymer in the presence of an acid catalyst and then reacting it with a polyalkylene polyamine.

Examples of the monomer components of the polyolefin polymer include ethylene, propylene, -butene, isobutylene,
It can be an α-olefin having 2 to 8 carbon atoms such as 1-hexene, 2-methylpentene-1,1-octene,
Preferred are propylene and isobutylene. The molecular weight of the polyolefin polymer is preferably 500 to 4,500 in consideration of compatibility with gasoline.

Further, as the polyalkylene polyamine polymer, it is preferable to use one having a repeating unit number n of 1 to 10 in the general formula, and examples thereof include polyethylene polyamine, polypropylene polyamine, polybutylene polyamine, etc., and polyethylene polyamine is particularly preferred.

The molecular weight of the benzylamine derivative thus produced is 500 to 5,000, preferably 1000 to 300.
If the molecular weight is less than 500, the effect of preventing deposits from adhering will be significantly reduced;
If it exceeds 0, the fluidity on the surface of the intake valve will decrease and it will become a cause of deposits, which is not preferable.

Benzylamine derivative is 10p based on the total amount of gasoline.
It is preferable to add it in an amount of pm to 5000 ppm.

The polyoxyalkylene glycol used in the present invention is represented by the general formula % (where R1 is an alkylene group, preferably ethylene, propylene, butylene, or a mixed alkylene group thereof). It is something.

Examples of polyoxyalkylene glycol derivatives include ether compounds, ester compounds, and ether/amino acid ester compounds.

Ether compounds include monoethers represented by the general formula % and diethers represented by the general formula R2C)-R,-(OR,), -0R2.

(However, Ro is the same as above, R2 is aliphatic,
It represents a cycloaliphatic or aromatic hydrocarbon group, and R2 in diethers may be the same or stationary.

) In particular, R2 is methyl, ethyl, propyl, isopropyl, butyl, isobutyl, (1)-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, phenyl, benzyl, tolyl, xylyl, phenethyl, p-methoxyphenyl, Cyclohexyl and cyclopentyl groups are preferred.

Ester compounds include monoesters represented by the general formula % and diesters represented by the general formula R3C0O-R1-(OR1)l, -○○OR3.

(However, R1 and R2 are the same as above, but R2 may be hydrogen, and R3 represents a fatty acid residue.) The fatty acids in R3 include acetic acid, propionic acid, acetic acid, valeric acid,
caproic acid, heptanoic acid, caprylic acid, pelargonic acid,
n-decanoic acid, n-undecanoic acid, n-dodecanoic acid (lauric acid), n-pentadecanoic acid, n-hepropionic acid,
n-hexadecanoic acid (palmitic acid), n-octadecanoic acid (stearic acid), n-eicosanoic acid, n-tocosanoic acid (behenin 1g2), n-pentaeicosanoic acid, n
-hebutaeicosanoic acid, n-hexaeicosanoic acid, n-
Examples include octaeicosanoic acid, η-1-liacontanoic acid, etc. Mixed fatty acids derived from natural products such as fish oil fatty acids, beef tallow fatty acids, and coconut fatty acids can also be used, and these hydrogenated fatty acids are preferably used. is used.

Furthermore, the ether/amino acid ester compound is an ester of polyoxyalkylene glycol or its 1,000 alkyl ether and ω-amino fatty acid, as shown by the following formula.

Formula % Formula % (In the formula, R3 represents hydrogen or a lower alkyl group, R4 represents a lower alkylene group. m represents an integer of 2 to 8.) In the formula,
R3 is hydrogen or a lower alkyl group, preferably a methyl group,
Ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group, and R1 is a lower alkylene group, preferably ethylene group (-CH2-CH2-), propylene group (CH(C1l-)C1b) , butylene group (-CH(C2L)-CH2)-) is preferred.

These polyoxyalkylene glycols or derivatives thereof have a molecular weight of 500 to 5000, preferably 1000 to 5000.
It is best to use one with a molecular weight of 3,000. If the molecular weight is less than 500, the effect of preventing deposits from adhering will be significantly reduced, and if it exceeds 5,000, the fluidity on the intake valve surface will decrease, which may itself be the cause of deposits. This is not desirable because it becomes a substance.

The polyoxyalkylene glycol or its derivative is preferably added in an amount of 10 ppm to 5000 ppm based on the total amount of gasoline.

In the gasoline additive composition of the present invention, the benzylamine derivative exhibits a deposit-preventing effect by adhering to the intake valve surface together with polyoxyalkylene glycol or its derivative.

In addition, the lubricating oil fraction has good compatibility with benzylamine derivatives, polyoxyalkylene glycols, or their derivatives, and the fluidity of the benzylamine derivatives, polyoxyalkylene glycols, or their derivatives after gasoline evaporates on the intake valve surface. , and has the function of a carrier oil that increases solubility in gasoline and prevents deposits from being deposited.

Such a lubricating oil fraction is 3 mm2/s to 35
There are lubricating oil fractions with a viscosity of mm2/s (100°C), for example, raffinate obtained by extracting vacuum distillate oil with a solvent such as phenol, furfural, N-methylpyrrolidone, etc. Hydrocarbon distillate oil obtained after solvent derailment treatment with a solvent of A mixture with residual oils subjected to solvent extraction, solvent derailing and solvent deasphalting treatments can be used. Also, contact derailment treatment may be performed instead of solvent derailment treatment.

These refined mineral oils are lubricating oil fractions that are either paraffinic, naphthenic, etc., singly, or a mixture of these.

If the viscosity of the lubricating oil fraction is less than 3 mm2/s, it will evaporate along with gasoline and will no longer function as a carrier oil, and if it exceeds 35 mm2/s, the fluidity will decrease and the lubricating oil fraction itself will accumulate. It is not desirable because it becomes a causative agent of things.

The lubricating oil fraction is preferably used in an amount of 0.1 to 5 parts by weight based on 1 part by weight of the total amount of the benzylamine derivative, polyoxyalkylene glycol, or its derivative.

The gasoline to which the composition of the present invention is added includes straight-run naphtha,
It is a common automotive fuel with a gasoline boiling range obtained from polymerized gasoline, natural gasoline, or catalytically cracked or thermally cracked or catalytically reformed feedstocks.

In addition to the composition of the present invention, for example, methyl tert
- octane improvers such as butyl ether (MTBE),
Antistatic agents, corrosion inhibitors, antioxidants, anti-icing agents, dyes, etc. may be added.

[Action and effect of the invention]

The gasoline additive composition of the present invention comprises benzylamine derivatives, polyoxyalkylene glycols or derivatives thereof,
By having a lubricating oil fraction with a viscosity of 3 mm2/S to 35 mm2/5 (100°C) as the main component, it has excellent thermal stability and is effective in preventing deposits from benzylamine derivatives, polyoxyalkylene glycols, or their derivatives. In addition, the lubricating oil fraction functions as a carrier oil for additives, has an excellent dispersion effect in gasoline, and can effectively prevent deposits from adhering to metal surfaces such as intake valves. It is.

The gasoline additive composition of the present invention will be explained below with reference to Examples.

[Example 1] Density 0. 752g/cm2 (15℃), Reid vapor pressure 0. 750 Kgf/cm2 (37.8°C), aromatic content 402%, olefin content 19.6%, 10% distillation temperature 46.5°C, 50% distillation temperature 99.0°C, 90% distillation temperature 147 (1) Add a benzylamine derivative (molecular weight 2500) having the following structural formula to gasoline having distillation properties at 0°C at 100 ppm by weight based on the total amount of gasoline (wherein, R is a polyisobutenyl group with a weight average molecular weight of 2000, and η is Approximately 8) ■Polyoxypropylene glycol (molecular weight 1000
) is 100 pm1 (by weight) based on the total amount of gasoline, and the viscosity is 4. 7mm'/s (100℃) lubricating oil (150 neutral oil) to the total amount of gasoline
00 ppm by weight was added to gasoline to prepare sample oil 1.

Using this sample oil 1 and a multigrade oil (SAE engine oil viscosity number 10W30) as an engine oil, a deposit accumulation test on an intake valve was conducted using an actual machine.

For this test, a Toyota IGFE engine (inline 6 cylinder 4 valve system) connected to a dynamometer was used. After operating for 100 hours under specified conditions, the engine was disassembled, the intake valve was removed, and the deposits were removed. The state of adhesion was visually evaluated based on the evaluation criteria of the CRC method, using a 10-point scale ranging from score 1 for the maximum amount of deposits to score 10 for no deposits. In addition, the weight of the deposit was determined by direct measurement. Sample (intake valve)
The number was 12.

The results are shown in the table below.

[Example 2] In place of the polyoxypropylene glycol in Example 1, the same amount of polyoxypropylene glycol monobutyl ether (molecular weight 1100) was added to prepare sample oil 2.

Using this sample oil 2, the same test as in Example 1 was conducted, and the results are also shown in the table.

[Example 3] In place of the polyoxypropylene glycol in Example 1, the same amount of polyoxypropylene glycol acetate (molecular weight 1100) was added to prepare sample oil 3.

Using this sample oil 3, the same test as in Example 1 was conducted, and the results are also shown in the table.

[Example 4] In place of the polyoxypropylene glycol in Example 1, an ester of polyoxyisobutylene glycol monobutyl ether and 3-aminopropionic acid (
Sample oil 6 was prepared by adding the same amount of 1000 (molecular weight: 1000, decomposition start temperature: 320°C).

Using this sample oil 4, the same test as in Example 1 was conducted, and the results are also shown in the table.

[Comparative Example 1] Comparative oil 1 was prepared using only gasoline without adding any additives in Example 1, and the same tests as in Example 1 were conducted. The results are also shown in the table.

(Margin below) Out wish Man east Burning Co., Ltd. Sub-agent patent attorney Nobuhiko Uchida (7 other people)

Claims (1)

[Claims] (1) A benzylamine derivative having a molecular weight of 500 to 5000 and a polyoxyalkylene glycol or its derivative having a molecular weight of 500 to 5000, and a viscosity of 3 mm^2/s to 35 mm^2/s (100°C), represented by the following general formula. A gasoline additive composition whose main component is a lubricating oil fraction. General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (In the formula, R is an alkyl group derived from a polyolefin polymer with a molecular weight of 500 to 4,500, R' is an alkylene group,
n represents an integer of 1 to 10. )