RU1391086C - Lubricating composition - Google Patents

Abstract

FIELD: lubricating compounds applicable in high- power automobile and tractor diesel engines. SUBSTANCE: lubricating composition additionally has product of condensation of alkyl phenols with average molecular weight of 900-1500, polyethylene polyamines with 3-6 amine groups and formaldehyde modified with boric acid and aliphatic monocarbonic acid with 10-20 carbon atoms. Lubricating composition base oil is taken in form of polyalphaolefin oil with the following qualitative and quantitative composition, mas. 2,2′-methylene-bis-(4-methyl-6-tertiary-butylphenol) 0.1-0.3; zinc dialkyl dithiophosphate 1.0-2.0; zinc dialkylphenyl dithiophosphate 1.0-3.0; polymethyl siloxane 0.003-0.005; alkali alkyl salicylate of calcium 8.0-10.0; above indicated product of condensation 1.0-3.0; diisooctyl sebacate 18.0-20.0; the balance, polyalphaolefin oil. Lubricating composition features solidification temperature and low dynamic viscosity at subzero temperature (η -40 C, C=156 P). EFFECT: higher dispersing action within a wide temperature range. 1 tbl

Description

 The invention relates to the automotive and tractor industries, in particular to the composition of motor oil intended for use in highly accelerated automotive and tractor diesels that are operated in harsh conditions.

 The aim of the invention is to increase the dispersing effect of the lubricant composition in a wide range of operating temperatures to ensure a high level of detergent-dispersant properties at both high and low operating temperatures in operating conditions.

 The following is a brief description of the ingredients that make up the lubricant composition.

CH

Диалкилфенилдитиофосфат цинка (ТУ 38101680-77) представляет собой раствор в масле диалкилфенилдитиофосфата цинка общей формулы

P

Zn где R алкил С₈, содержит цинка не менее 2,4% фосфора не менее 2,3% серы не менее 4,5% рН раствора присадки в спиртобензольной или спиртотолуольной смеси не менее 2,7.2,2'-Methylene-bis- (4-methyl-6-tert-butylphenol) is an oil solution of 2,2'-methylene-bis- (4-methyl-6-tert-butylphenol) of the general formula

CH

Zinc dialkylphenyldithiophosphate (TU 38101680-77) is a solution of zinc dialkylphenyldithiophosphate in oil of the general formula

P

Zn where R is alkyl C ₈ , contains zinc of not less than 2.4% phosphorus, not less than 2.3% sulfur, not less than 4.5%, the pH of the additive solution in the alcohol-benzene or alcohol-toluene mixture is not less than 2.7.

P

Zn где R алкил С₈; R₁ алкил С₄, содержит активные элементы, цинк 4,7-5,6 и фосфор 4,4-4,9, рН раствора присадки в спиртобензольной или спиртотолуольной смеси не менее 5,5.Zinc dialkyldithiophosphate (OST 38.129-73) is a solution of zinc dialkyldithiophosphate in oil of the general formula

P

Zn where R is alkyl C ₈ ; R ₁ alkyl C ₄ contains active elements, zinc 4.7-5.6 and phosphorus 4.4-4.9, the pH of the solution of the additive in an alcohol-benzene or alcohol-toluene mixture is at least 5.5.

 The high molecular weight Mannich base (TU 38.USSR 201348-80) is a 40-50% solution in mineral oil and unreacted polybutylene of the condensation product by the Mannich reaction of alkyl phenols with a number average molecular weight of 900-1500, polyethylene polyamines (with 3-6 amine groups) and formaldehyde modified with boric acid and aliphatic monocarboxylic acid with 10-20 carbon atoms. The high molecular weight Mannich base contains, nitrogen 0.8-1.3, boron 0.1-0.3.

Calcium alkaline alkyl salicylate (OST 38.01100-76) is a colloidal solution in the mineral oil of the calcium salt of alkyl salicylic acid with a molecular weight in the range of 750-820 and finely divided calcium carbonate, which is also in a colloidal state. The content of the calcium salt of alkyl salicylic acid in the solvent oil is in the range of 25-30% and calcium carbonate is 6-9%. The composition of alkaline calcium alkyl salicylate also includes free alkyl phenols and alkyl phenol ethers in an amount of up to 20%. Total alkalinity of the additive is 100-140 mg KOH per 1 g. Calcium alkali alkyl salicylate is obtained by carbonation by carbon dioxide in the presence of Ca (OH) ₂ neutral alkyl salicylate dissolved in mineral oil.

 Polymethylsiloxane (TU 6-02-718-72) is a mixture of polymers of methylsiloxanes of linear and cyclic structure with a molecular weight in the range of 250-3500.

Diizooktilsebatsinat (GOST 8728-77E, 1977) at a density of 0,913-0,919 product, an acid number of not more than 0.12 mg KOH / g, a saponification value of 261-270 mg KOH / g and a flash point at least 215 ° ^C.

Poly-α-olefin oil (TU 38401497-84) was obtained by catalytic polymerization of C ₈ -C ₁₄ α-olefins based on fractions of α-olefins 140-240 ^о С from cracked paraffins or ethylene oligomers followed by hydrogenation of polymerization products boiling above 300 ^о С, kinematic viscosity at 100 ^о С is 9.3 mm ² / s, viscosity index 110, pour point minus 55 ^о С, flash point 220 ^о С.

The oil is prepared in two stages as follows. First, the base oil is prepared by mixing in an agitator the appropriate quantities of synthetic poly-α-olefin oil M-9C with diisooctylsebacinate. Then, in the base oil, warmed to 70-90 ^{° C,} the additive is introduced. The sequence of the introduction of additives is not regulated. Mixing is carried out until a homogeneous mass is obtained throughout the volume of the container. The uniformity of the obtained oil is determined by the viscosity at 100 ^about C and the alkaline number (mg KOH / g) of the upper and lower layers.

 PRI me R 1. Lubricating oil contains, by weight.

2,2'-Methylene-bis- (4-methyl-6-tert-butylphenol) 0.35 Zinc dialkyldithiophosphate 2.5
Zinc dialkylphenyl dithiophosphate 0.5 Polymethylsiloxane 0.006
Alkaline Calcium Alkyl Salicylate 8
High molecular weight
the foundation of Mannich, mod-
fixed boric acid
lot and aliphatic
fatty acid (medium
numerical molecular weight of alkyl phenols 600) 0.5 Diisooctylsebacinate 17
Poly-α-olefin oil Else
PRI me R 2. Lubricating oil contains, by weight.

2,2'-Methylene bis- (4-methyl-6-tert-butylphenol) 0.05 Zinc dialkyldithiophosphate 0.5
Zinc dialkylphenyldithiophosphate 3.5 Polymethylsiloxane 0.002
Alkaline Calcium Alkyl Salicylate 7.0
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium-
non-numeric molecular weight of alkyl phenols 1500) 3.0 Diisooctylsebacinate 21
Poly-α-olefin oil Else
PRI me R 3. Lubricating oil contains, by weight.

2,2'-Methylene bis- (4-methyl-6-tert-butylphenol) 0.3 Zinc dialkyldithiophosphate 2.0
Zinc dialkylphenyldithiophosphate 3.0 Polymethylsiloxane 0.005
Alkaline Calcium Alkyl Salicylate 10.0
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium
numerical molecular
mass of alkyl phenols 1500) 3.0
Diisooctylsebacinate 18
Poly-α-olefin oil Else
PRI me R 4. Lubricating oil contains, by weight.

2,2'-Methylene-bis- (4-methyl-6-tert-butylphenol) 0.2 Zinc dialkyldithiophosphate 2.0
Zinc dialkylphenyldithiophosphate 2.0 Polymethylsiloxane 0.004
Alkaline Calcium Alkyl Salicylate 9.0
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium
numerical molecular weight of alkyl phenols 1200) 2.0 Diisooctylsebacinate 19
Poly-α-olefin oil Else
PRI me R 5. Lubricating oil contains, by weight.

2,2'-Methylene bis- (4-methyl-6-tert-butylphenol) 0.1 Zinc dialkyldithiophosphate 1.0
Zinc dialkylphenyl dithiophosphate 1.0 Polymethylsiloxane 0.003
Alkaline Calcium Alkyl Salicylate 8.0
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium
numerical molecular weight of alkyl phenols 900) 1.0 Diisooctylsebacinate 20
Poly-α-olefin oil Else
PRI me R 6. Lubricating oil contains, by weight.

2,2'-Methylene-bis- (4-methyl-6-tert-butylphenol) 0.4
Zinc dialkylphenyl dithiophosphate 0.5 Zinc dialkyl dithiophosphate 2.0 Polymethylsiloxane 0.004
Alkaline Calcium Alkalysalicylate 11.0
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium
numerical molecular weight of alkyl phenols 600) 0.5
Diisooctylsebacinate 17
Poly-α-olefin oil Else
PRI me R 7. Lubricating oil contains, by weight.

2,2'-Methylene-bis- (4-methyl-6-tert-butylphenol) 0.2 Polymethylsiloxane 0.002 Zinc dialkyldithiophosphate 1.5
Zinc dialkylphenyl dithiophosphate 2.0
Alkaline Calcium Alkyl Salicylate 8.0
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium
numerical molecular weight of alkyl phenols 2000) 3.5 Diisooctylsebacinate 21
Poly-α-olefin oil Else
PRI me R 8. Lubricating oil contains, wt.%
2,2'-Methylene bis- (4-methyl-6-tert-butylphenol) 0.2 Zinc dialkyldithiophosphate 1.5
Zinc dialkylphenyldithiophosphate 2 Polymethylsiloxane 0.004
Calcium alkaline alkyl salicylate 9 Diisooctylsebacinate 19
Poly-α-olefin oil Else
PRI me R 9. Lubricating oil contains, by weight.

2,2'-Methylene bis- (4-methyl-6-tert-butylphenol) 0.2 Zinc dialkyldithiophosphate 1.5
Zinc dialkylphenyldithiophosphate 2 Polymethylsiloxane 0.004
High molecular weight
the foundation of Mannich,
differential boric
acid and aliphatic
fatty acid (medium
numerical molecular weight of alkyl phenols 1200) 2 Diisooctylsebacinate 19
Poly-α-olefin oil Else
The obtained samples and the known oil are subjected to laboratory tests to determine the presence of a synergistic effect in the dispersant stock with the additional introduction of the proposed combination of alkaline calcium alkyl salicylate and modified Mannich base.

Method laboratory study is to determine the dispersive properties of the oil at three temperatures of 20, 200 and 250 ^C. It is based on sample preparation by mixing the test oil with additives (20 g), with the sludge-contaminant (5 g) and distilled water (0, 25 g) and heating part of the sample to 200 ^° C (10 min) and another part to 250 ^° C. Drops are applied onto the chromatographic paper with a syringe: the sample is heated, the samples are heated to 200 and 250 ^° C. The filter paper with the droplets applied is aged 48 h at room temperature, after th defined on (%) ratio of the diameters of spots dense browning (d diffusion contamination particles) and the spreading of oil is determined amount D. ratios d / D, received at all temperatures (20, 200 and 250 ^C). The results of laboratory determinations are shown in the table.

 The results of laboratory tests presented in the table show that the synergistic effect in the stock of dispersing action at low and high temperatures is provided only with the proposed ratio of components (samples according to examples 3-5).

Using this oil will allow reliable operation over a wide range of engine operating temperatures, including cold zones with temperatures up to ^-60 ° C. Providing engine start at low temperatures on the present oil is determined by its low pour point and low dynamic viscosity value at temperatures below 0 ° ^C. (η at -40 ^о С 156 Пз).

Claims (1)

 LUBRICANT COMPOSITION based on a base oil with the addition of 2,2 ′ -methylene-bis- (4-methyl-6-tert-butylphenol), alkaline calcium alkyl salicylate, zinc dialkyl dithiophosphate, zinc dialkyl phenyl dithiophosphate, polymethyl siloxane and diisooctyl sebacate, which increasing the dispersing effect of the composition in a wide range of operating temperatures, it additionally contains a condensation product of alkyl phenols with an average molar mass of 900 1500, polyethylene polyamines with 3 to 6 amine groups and formaldehyde modified with boric acid otoy and aliphatic monocarboxylic acid with 10 20 carbon atoms, and as a base oil contains poly-α-olefin oil in the following ratio, wt. 2,2 ′ -Metylene-bis- (4-methyl-6-tert-butylphenol) 0.1 0.3
Zinc dialkyldithiophosphate 1.0 2.0
Zinc dialkylphenyl dithiophosphate 1.0 3.0
Polymethylsiloxane 0.003 0.005
Alkaline Calcium Alkyl Salicylate 8.0 10.0
The above condensation product 1.0 3.0
Diisooctylsebacinate 18.0 20.0
Poly- α olefin oil Up to 100

Images