JPH0488090A - Additive composition for gasoline - Google Patents

Abstract

PURPOSE:To provide the subject composition capable of remarkably reducing deposits at intake valves of engines for automobiles by compounding a specific alkylamine, an ester and a polyoxyalkylene glycol (derivative) as main components. CONSTITUTION:The objective composition comprises (A) an alkylamine having a polyolefin polymer as an alkyl group thereof and having a mol.wt. of 500-5000, preferably 1000-3000, (B) an ester [e.g. isodecyl butanoate or di(2-ethylhexyl) adipate] and (C) a polyoxyalkylene glycol (derivative) having a mol.wt. of 500-5000, preferably 1000-3000, as main components and preferably further (D) a lubricant fraction having a viscosity of 3-35mm<2>/S (100 deg.C).

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 an alkylamine having a molecular weight of 500 to 5,000, and an ester having a polyolefin polymer as an alkyl group component;
000 polyoxyalkylene glycol or its derivatives as the main component.

Further, the gasoline additive composition of the present invention contains an alkylamine having a polyolefin polymer as an alkyl group component, an ester, a polyoxyalkylene glycol or a derivative thereof having a molecular weight of 500 to 5000, and a viscosity of 3 mm2/s to
The main component is a lubricating oil fraction of 35 mm2/s (100°C).

The alkylamine used in the present invention has a polyolefin polymer as an alkyl group component, and examples of olefins used in its production include ethylene, propylene, 1-butene, isobutylene, 1-hexene, 2-
An α-olefin having 2 to 8 carbon atoms such as methylpentene-1,1-octene can be used. The polyolefin polymer is preferably polypropylene or polyisobutylene.

As a method for producing an alkylamine, for example, the above polyolefin polymer is reacted with cyanoethylene to produce a polyalkenylcyanoethane, and the polyalkenylcyanoethane is further hydrogenated in the presence of a hydrogenation catalyst.

It is best to use an alkylamine with a molecular weight of 500 to 5,000, preferably 1,000 to 3,000. If the molecular weight is less than 500, the effect of preventing deposits from accumulating will be significantly reduced, and if it exceeds 5,000, it will be difficult to use on the intake valve surface. This is undesirable because it reduces the fluidity of the substance and becomes a substance that causes deposits.

Alkylamine is 10 ppm to total amount of gasoline.
It is preferable to add it so that it contains 5000 ppm.

Next, as esters, monoesters, diesters,
Examples include polyol esters.

The monoester in the present invention is obtained by an esterification reaction between an alcohol having 4 or more carbon atoms and an organic acid having 4 or more carbon atoms.

Examples of alcohols having 4 or more carbon atoms include n-butanol, isobutanol, n-pentanol, impentanol, n-hexanol, isohexanol, n-hebutano-JLz, isoheptatool, octatool, 2-
Examples include ethylhexanol, n-nonyl alcohol, isononyl alcohol, n-decyl alcohol, isodecyl alcohol, undecanol, lauryl alcohol, stearyl alcohol, and preferably 2-ethylhexanol, isononyl alcohol, and isodecyl alcohol.

Examples of organic acids include n-butanoic acid, isobutanoic acid,
n-pentanoic acid, isopentanoic acid, ηhexanoic acid, 2-
Ethyl butanoic acid, cyclohexanoic acid, n-hebutanoic acid,
isooctanoic acid, methylcyclohexanoic acid, n-octanoic acid, dimethylhexanoic acid, 2-ethylhexanoic acid, 2
．． 4. 4 trimethylpentanoic acid, isooctanoic acid,
3.5-trimethylhexanoic acid, n-nonanoic acid, isononanoic acid, isodecanoic acid, isoundecanoic acid, 2-butyloctanoic acid, tridecanoic acid, tetradecanoic acid, hexadecanoic acid and octatecanoic acid, preferably hebutanoic acid, These are n-octanoic acid and 2-ethylhexanoic acid.

The synthesis of esters from alcohols and organic acids can be carried out by conventional methods, such as dehydration condensation under acidic catalysts.

Preferred monoesters include isodecyl butanoate, isodecyl hebutanoate, isodecyl octanoate, 2-ethylhexyl octanoate, 2-ethylhexyl octanoate, 2-ethylhexyl katate, and isononyl. These include butanoate, isononyl alcohol, isononyl undecanoate, and the like.

Furthermore, the diester that can be used in the present invention is one obtained by an esterification reaction between an alcohol and a dicarboxylic acid.

Examples of alcohol include methanol, ethanol,
n-propatool, isopropatool, n-butanol, isobutanol, n-pentanol, isopentanol, n-hexanol, isohexanol, n-heptatool, isoheptatool, octatool, 2-ethylhexanol, n -nonyl alcohol, isononyl alcohol, n-decyl alcohol, isodecyl alcohol, undecanol, lauryl alcohol, stearyl alcohol, etc., preferably 2-ethylhexanol, isononyl alcohol, isodecyl alcohol.

Examples of dicarboxylic acids include malonic acid, succinic acid, glutaric acid, adipic acid, damaric acid, corkic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid,
Tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanonic acid, octadecanoic acid, nonadecanonic acid, icosaniic acid, phthalic acid, terephthalic acid, etc., and preferably adipic acid, azelaic acid, sebacic acid, and phthalic acid.

The diesterification reaction between an alcohol and a dicarboxylic acid can be carried out by a conventional method, for example, a method of dehydration condensation under an acidic catalyst.

Preferred diesters include di(2-ethylhexyl) adipate, dioctyl adipate, diisononyl adipate, diisodecyl adipate, di(2-ethylhexyl) azelate, diisononyl azelate, dioctyl sebacate, diisodecyl sebacate, di(2-ethylhexyl) phthalate, and the like. It is.

In addition, the polyol ester used in the present invention includes:
It is produced by synthesis of a polyol having 5 to 9 carbon atoms and an organic acid having 4 to 18 carbon atoms.

Examples of polyols having 5 to 9 carbon atoms include 22-dimethylpropane-1,3-diol (i.e., neopentyl glycol), 2-ethyl-2-butyl-propane-1,
3-diol, 2,2 diethylpropane-1,3-diol, 2,2 dibutylpropane-13-diol, 2-
Methyl-2-propylpropane-1,3-diol, 2
- ethyl-2-butylpropane-1,3-diol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, preferably neopentyl glycoli 12-methyl-2-propylpropane-1,3-dimer, Trimethylolpropane and pentaerythritol are particularly preferred, and neopentyl glycol, trimethylolpropane and pentaerythritol are particularly preferred.

Further, organic acids include, for example, n-butanoic acid, isobutanoic acid, n-
Pentanoic acid, isopentanoic acid, n-hexanoic acid, 2-ethylbutanoic acid, cyclohexanoic acid, n-hebutanoic acid, isohebanoic acid, methylcyclohexanoic acid, n-octanoic acid, dimethylpropanoic acid, 2-ethylhexanoic acid, 2 ，
4.4-) Limethylpencunic acid, isooctanoic acid, 3.
5. 5-trimethylhexanoic acid, n-nonanoic acid, isononanoic acid, isodecanoic acid, isoundecanoic acid, 2-butyloctanoic acid, tridecanoic acid, tetradecanoic acid, hexadecanoic acid and octadecanoic acid, preferably hebutanoic acid and n-octanoic acid. , 2-ethylhexanoic acid.

Synthesis of a polyol ester from an organic acid and a polyol can be carried out by a conventional method, for example, a method of dehydration condensation under an acidic catalyst.

Preferred polyol esters (hereinafter, neopentyl is abbreviated as NPG, trimethylolpropane is abbreviated as TMP, and pentaerythritol is abbreviated as PE). ), NPC Di(heptanoate)), NPC Di(2-ethylbutyrate), NPC Di(cyclohexanoate), N
PC・G (heptanoate), NPC・G (isoheptanoate), NPC・G (octylate), N
PG・G (2-ethylhexanoate), NPC・G (isooctanoate), NPC・G (isononylate), NPC・G (isodecanoic acid)), NP
C.G (mixed (hexanoate, heptanoate))
, NPC・G (mixture (hexanoate, octanoate)), NPC・G (mixture (hexanoate, nonylate)), NPC・G-C mixture (heptanoate,
octanoate)), NPG-G (mixed (heptanoate, nonylate')), NPC-G (mixed (heptanoate, iso-octanoate)), NPC-G τ mixture (heptanoate, isononylate)), NP
C・G (mixed (isooctanoate, isononylate)), NPG・G (mixed (butanoate, tridecanoate)), NPC・G (mixed (butanoate, tridecanoate))
Tetrazocaate)), NPC-G (mixed (butanoate, hexadecanoate)), NPG-G (mixed (butanoate)).

octadecanoate))), NPG-G (mixed (hexanoate, isooctanoate, isononylate)))
, NPC/Di-C mixed (hexanoate, isooctanoate, isodecanoate)), NPC/Di (mixed (heptanoate, isooctanoate, isononylate)), NPC/Di(mixed (heptanoate, isooctanoate, isodecanoate)) )), NPG-G(
Mixture (octanoate, isononylate, isodecanoate)), TMP/Tree (pentanoate), TM
P-tree (hexanoate), TMP-tree (heptanoate), TMP-tree (octanoate)
, TMP tri(nonylate), TMP tri(isopentanoate), TMP tri(2-ethylbutyrate), TMP tri(isopentanony))
, TMP trie (isooctanoate), TMP trie (2-ethylhexanony)), TMP trie (isononylate), TMP trie (isodecanoate), TMP trie [mixture (butyrate, octadecanoate) ], TMP Tory [mixture (hexanoate, hexate'caate)), TMP Tory [
Mixture (heptanoate, tridecanoate)], TMP
・Tree [Mixed (octanoate, decanoate)]
, TMP tri [mixture (octanoate, nonylate)], TMP tri [mixture (butyrate, heptanoate, octadecanoate)], TMP tri [mixture (
pentanoate, heptanoate, tridecanoate)
), TMP tri [mixture (hexanoate, heptanoate, octanoate)], PE tetra (pentanony)), PE tetra (hexanoate)
, PE Tetra (isopentanoni), PE Tetra (2-ethyl butyrate), PE Tetra (isoheptanoate), PE Tetra (isooctanoate),
PE-tetra (2-ethylhexanoate), PE-tetra (isononylate), PE-tetra (oleate),
and esters of PE and mixtures of linear or branched carboxylic acids having 4 to 8 carbon atoms.

Also, neopentyl polyols other than NPGSTMP and PE, namely 2-methyl-2-propylpropane-1,3
Examples include esters of -diol, 2,2-diethylpropanediol, trimethylolethane, and trimethylolhexane and the above organic acids alone or in combination.

These esters are contained at 10 ppm based on the total amount of gasoline.
It is preferable to add it to contain up 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 derivatives of polyoxyalkylene glycol include ether compounds, ester compounds, and ether/amino acid ester compounds. Examples of ether compounds include monoethers represented by the general formula %), and monoethers represented by the general formula R20-R, -(OR,). -OR.

There are diethers represented by

(However, R1 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 R3COO-R, -(OR,), -0COR3.

(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 R8 include acetic acid, propionic acid, butyric 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-heptadecanoic acid,
n-hexadecanoic acid (palmitic acid), n-octadecanoic acid (stearic acid), n-eicosanoic acid, n-tocosanoic acid (behenic acid), n-pentaeicosanoic acid, n-hebutaeicosanoic acid, n-hexaeicosanoic acid, Examples include n-octaeicosanoic acid, n-)liacontanoic acid, etc., and 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 hydrogenated fatty acids thereof are preferably used. fatty acids are used.

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

Formula % Formula % (2 (In the formula, R' is hydrogen or a lower alkyl group, R'' represents a lower alkylene group. m represents an integer from 2 to 8.) In the formula,
R' is hydrogen or a lower alkyl group, preferably a methyl group,
ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group, and R'' is a lower alkylene group, preferably ethylene group (-CII2-CH2-),
A propylene group (-CH(CH3L-CII2-)) and a butylene group (-CH(C2H5)-CH2) are 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 composition of the present invention, the alkylamine is polyoxyalkylene glycol or a derivative thereof,
By adhering to the intake valve surface together with ester and ester, it exhibits an effect of preventing deposits from adhering.

In addition, the ester has the function of preventing deposits from being deposited on the intake valve surface, and increases the fluidity of alkylamines, polyoxyalkylene glycols, or their derivatives after gasoline evaporates on the intake valve surface, and improves their dissolution in gasoline. It is presumed that it functions as a so-called carrier oil, which enhances sex.

In addition, a lubricating oil fraction is added as a carrier oil if necessary, but the lubricating oil fraction has good compatibility with alkylamines, esters, polyoxyalkylene glycols, or their derivatives, and the gasoline is absorbed on the intake valve surface. Improving the fluidity of alkylamines, polyoxyalkylene glycols or their derivatives after evaporation and solubility in gasoline,
It has the function of preventing 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 dewaxing treatment with a solvent and further hydrorefining as necessary to improve hue and remove unstable substances, or this hydrocarbon distillate oil and residual oils subjected to solvent extraction, solvent dewaxing and solvent deasphalting treatments can be used. Further, catalytic dewaxing treatment may be performed instead of solvent dewaxing 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 0.0 parts by weight per 1 part by weight of the total amount of alkylamine, ester, and polyoxyalkylene glycol or its derivative. It is advisable to use 1 to 5 parts by weight.

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 invention]

The gasoline additive composition of the present invention contains an alkylamine, an ester, a polyoxyalkylene glycol or a derivative thereof, and if necessary, a viscosity of 3 mm2/s to 35 mm2.
/s (100°C) as the main component, it has excellent thermal stability, and in addition to the anti-deposition effect of alkylamines, esters, polyoxyalkylene glycols, or their derivatives, esters or lubricants The 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.

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. 750Kgf/cm2 (37.8℃), aromatic content 402%, olefin content 19.6%, 10% distillation temperature 4
6.5°C, 50% distillation temperature 99.0°C, 90% distillation temperature 147.0°C. weight ppm ■, trimethylolpropane)'J-(2-ethylhexanoate) 200 weight ppm based on the total amount of gasoline 5 ■, polyoxypropylene glycol (molecular weight 1000
) was added to gasoline so that it contained 100 weight pmS based on the total amount of 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 the gasoline additive composition in Example 1, the viscosity was further increased to 4. 7mm2/s (100℃) lubricating oil (
150 neutral oil) to 100% of the total amount of gasoline.
Sample oil 2 was prepared by adding the sample oil so as to contain ppm by weight.

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 ester in Example 1, the same amount of diisononyl adipate 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 polyoxypropylene glycol in Example 1, the same amount of polyoxypropylene glycol monobutyl ether (molecular weight 1100) was added to prepare sample oil 4.

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

[Example 5] 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 5.

Using this sample oil 5, the same test as in Example 1 was conducted, and the results are also shown in the table.

[Example 6] 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 6, 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.

Applicant: Tomoen Co., Ltd.

Claims (2)

[Claims] (1) A gasoline additive composition containing as main components an alkylamine having a molecular weight of 500 to 5,000 and an ester having a polyolefin polymer as an alkyl group component, and further a polyoxyalkylene glycol or a derivative thereof having a molecular weight of 500 to 5,000. (2) The gasoline additive composition according to claim 1 further has a viscosity of 3 mm^2/s to 35 mm^2/s (100°C).
A gasoline additive composition comprising a lubricating oil fraction.