DD278146A1 - LUBRICANTS WITH INCREASED PERFORMANCE LEVEL - Google Patents

Abstract

The invention relates to a combination of substances for lubricating oils with increased performance level, in particular for 2-stroke engine oils. According to the invention, the lubricating oils are obtained from 2 to 7 parts by mass in% of a Mannichkondensationsproduktes based on alkylphenols of chain length C8 to C18, fatty amines and an excess of up to 2 moles of formaldehyde / mole alkylphenol or paraformaldehyde in sulfonic acid medium in a two-stage process is produced.

Description

Application of the invention

The invention relates to a combination of substances for lubricating oils with increased performance level, in particular for 2-Takt-Mctorenöle.

Characteristic of the known technical solutions

Ashless detergent dispersant additives for engine oils are usually nitrogen-containing compounds which, owing to the high polarity of the molecule, are capable of accumulating or storing solid oil-fixing components of the oil and thus settling on piston skirt, cylinder walls and annular grooves to prevent or to solve already existing coverings. The manufacturing possibility and above all the raw material base is severely limited, since only olephile compounds can be used.

A widely used type of compound is the succinimides or their diverse derivatives. Their preparation is linked to the use of may acid or its anhydride and to the alkylation of this molecule with long-chain α-alkenes or polyisobutylene.

Another type of compound is the Mannichkondensationsprodukte, composed of alkylphenols and amines. While the low molecular weight compounds of this type are attributable to the oxidation and corrosion inhibitors, relatively high molecular weight products are required for the generation of DDE properties. Their preparation is therefore carried out by alkylation of phenol with long-chain α-alkenes having a C number> 30, polyisobutylenes ^ analogous suitable polymers or chlorinated hydrocarbon polymers or by the reaction of the phenolic component with high molecular weight branched amines, which in turn from hydrocarbon polymers on their chlorination products for this Use must be made. A recent development of detergent dispersants, especially for 2-stroke engine oils, are the so-called amido-amines, which are prepared on the basis of fatty acids and polyamines having 3 to 6 N atoms. For the oil solubility of amido-amines, however, it is unavoidable to use a minimum proportion of branched fatty acids or aryl fatty acids, which are not apparent from the natural source. They are specially prepared for this purpose by catalytic oxidation of polymeric hydrocarbons of a suitable molar mass range or of ci-ß-unsaturated long-chain alkenes or by dimensioning of polyunsaturated fatty acids or by alkylation of low molecular weight aromatics with unsaturated fatty acids.

Object of the invention

It is an object of the invention to find a lubricating oil with increased performance level, with which an increase in the use value is to be achieved.

Explanation of the essence of the invention

The invention has for its object to develop a lubricating oil with increased performance level, preferably for 2-stroke engine oils. According to the invention, the object is achieved by a Gioff combination in which 2 to 7 parts by mass in% of a Mannichkondensationsproduktes, based on AlkylDh- <änolen the chain length C ₈ to Ci ₈ , fatty amines of chain length C ₁₄ to C ₂ 4 and an excess of formaldehyde up to 2 / viol / mole of alkylphenol or of formaldehyde in the presence of technical grade alkylbenzenesulfonic acid having an acid number of 20 to 150 mg KOH / g in a two-step process is added to a base oil of suitable viscosity.

After another mark of the invention, other lubricant additives, such as oxidation and corrosion inhibitors, ischehaltige DD additives, pour point depressants can be used.

It has been found that the use of the Mannichkondensationsproduktes in addition to an improvement in the deposition behavior and their oxidation stability is improved.

Deposition behavior Metal strip test after Wolf Oxidation stability

Aging according to TGL 17 745 and 28 C84

Z-mud,%

Comparative product without Mannich product

5 to 6

1,6bis1,7

Compare product

with 3% Mannich product

8 to 9 from 0.1 to 0.3

Furthermore, the Mannichkondensationsprodukt has a corrosion-inhibiting effect, which has a positive effect both in the HBr test and in the steel wood test to TGL 21140 and in the cold corrosion of engine parts.

embodiments

1. In a heated mixing vessel, 65.95 parts by weight of a base oil produced by cryogenic hydrogenation of lignite smelters and tar oils in admixture with hydrogenated mineral oil vacuum distillate by distillation and ¹ dewaxing, have a viscosity of approximately 38 to 42 cm ² / s at 50 ° C and a pour point of about -5 to -10 ⁰ C, 12 Ma.-1 hile in% deasphalted, phenol-refined and entparaffiniortes SchweröJ, 14 parts by weight in% of a heavy gasoline, 0.9 Ma. Parts in% of a barium alkyl sulfonate having a basicity of about 100 mg KOH / g, 0.7 parts by mass in% of a zinc salt of dialkyl dithiophosphoric acids, 3 parts by mass in% of a Mannich product prepared by condensation of alkylphenol of the chain length of C ₈ to Ci ₈ , fatty amines of chain length C, ₄ to C ₂₄ and formaldehyde in the molar ratio 1: 1.2: 1 ,? to 2.0 0.5 parts by mass in% of a pour point depressant of the Paraflow type, 0.45 parts by mass in% of a lead carrier based on short-chain chlorinated alkanes and 2.5 parts by mass in% of a corrosion inhibitor from one mixture of fatty acid methyl ester and Dibutylammoniumalkylbenzolsulfonat at about 4O ⁰ C mixed together.

2. According to Example 1, wherein the barium alkyl sulfonate having a basicity of about 100 mg KOH / g by an alkyl benzene sulfonate having a basicity of about 145 mg KOH / g, prepared according to WP 220305 using a promoter combination comprising 32 parts by mass in % Alkylphenol sulfide, is replaced.

Claims (2)

claims: 1. lubricating oils with increased performance level, preferably for 2-stroke engine oils, characterized in that a suitable base oil 2 to 7 parts by mass in Mannichkondensationsprodukt a Mannichkondensationsproduktes, prepared in a two-step process of alkylphenols of chain length C ₈ to C ₁₈ , fatty amines of Chain length C ₁₄ to C ₂₄ and an excess of formaldehyde of up to 2 mol / mol of alkyiphenol or paraforrruildehyde in the presence of technical alkylbenzenesulfonic the acid number of 20 to 150 mg KOH / g, are admixed. 2. lubricating oils according to claim 1, characterized in that as further lubricant additives, such as oxidation and corrosion inhibitors, ash-containing DD additives, pour point depressants are used.