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Lubricating compositions containing aromatized 1,2-dihydro-2,2,4-trimethylquinoline polymers

A lubricating composition and composition technology, applied in a lubricating composition, ethyl, n-propyl or isopropyl, in which R is one of the following groups: the field of methyl, which can solve the problem of reduced lubricating performance and insufficient Problems with protecting equipment or machinery, falls, etc.

Inactive Publication Date: 2003-09-24
VANDERBILT CHEM LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is well known that oxidation tends to degrade lubricants and reduce their performance
Oxidation processes lead to reduced lubricating properties and are not sufficient to protect the equipment or machinery to be lubricated

Method used

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  • Lubricating compositions containing aromatized 1,2-dihydro-2,2,4-trimethylquinoline polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] To evaluate thermal stability, several lubricating compositions were prepared and evaluated. Sample A contained a formulated diester base oil (XR No. 2437-RT, manufactured by Quaker USA) and was used as a control. Sample B contained a formulated diester base oil and 2% by weight of AGERITE MA (arylated 1,2-dihydro-2,2,4-trimethylquinoline polymer containing mainly 2-6 monomer units) . Sample C contained a formulated diester base oil and 2 wt% of VANLUBE RD (a non-aromatic 1,2-dihydro-2,2,4-trimethylquinoline consisting of dimer and trimer units) and Also used as a comparative sample.

[0089] Thermal stability was evaluated by a modified ASTM D2070-91 test for thermal stability of oil-based compositions. The test is commonly known as the Cincinnati Milacron method. Copper and steel rods in contact with oil were evaluated for appearance and weight loss after exposure at 135°C for 168 hours. Sludge was determined by filtering the oil through No. 41 Whatman packing and...

Embodiment 2

[0093] The high temperature stability of base oils comprising arylated and non-arylated TMDQ polymers was evaluated. Lubricating compositions were prepared using different concentrations of the TMDQ polymer described in Example 1. The thermal stability of the composition was evaluated using the standard ICI thermal stability test, ie, requiring heating of a sample of the lubricating composition in a 150 ml beaker with a steel coupon at 200°C for 24 hours. The composition and thermal stability test results of the samples are listed in Table 4.

[0094] mass percentage

[0095] As can be seen from Table 4, lubricating compositions comprising arylated TMDQ polymers are clearly superior to lubricating compositions comprising non-aromatic TMDQ polymers. For example, at 1.0 wt% of the additive, the weight loss of the composition containing the arylated polymer was 59.2, while the weight loss of the composition containing the non-aromatic polymer was 63.5. At 2.0 wt% ad...

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Abstract

Lubricating compositions containing a major amount of a base oil and an effective amount of an additive component having at least one compound of formula (I):where R is one of the following radicals, methyl, ethyl, n-propyl, i-propyl or a combination thereof, and n=0-8. In a preferred embodiment, R is a methyl radical and n=2-3. The lubricating compositions provide improved lubricating performance, particularly by inhibiting oxidation and improving thermal stability.

Description

Background of the invention [0001] The present invention relates to lubricating compositions, especially lubricating compositions comprising antioxidants. [0002] It is well known that oxidation tends to degrade lubricants and reduce their performance. Oxidation processes lead to reduced lubricating properties and are not sufficient to protect the equipment or machinery to be lubricated. A general description of lubricants and lubricant oxidation can be found in Kirk-Othmer's Encyclopedia of Chemical Technology, Vol. 15, pp. 463-515 (4th Edition, 1995). Lubricant oxidation typically proceeds via a free radical mechanism. In order to suppress oxidation, various compounds can be added to lubricants as oxidation inhibitors. Oxidation inhibitors work by terminating free radical chain reactions that lead to lubricant oxidation. [0003] An example of an oxidation inhibitor is the non-aromatic polymer of 2,2,4-trimethyl-1,2-dichloroquinoline (commonly known as TMDQ). The polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M133/38C07D215/12C08G61/12C08G73/06C09K15/30C10M101/02C10M105/36C10M133/40C10M149/12C10M169/02C10M169/04C10N30/08C10N30/10C10N30/12C10N50/10C10N60/00
CPCC08G73/0627C10M133/40C10M149/12C10M2215/22C10M2215/221C10M2215/225C10M2215/226C10M2215/30C10M2217/00C10M2217/02C10M2217/04
Inventor 托马斯·J·卡罗尔史蒂文·G·唐纳利
Owner VANDERBILT CHEM LLC
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