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Pour point depression type viscosity index improver

A viscosity index improvement and additive technology, applied in the direction of additives, base materials, petroleum industry, etc., can solve the problems of engine starting damage, easy occurrence of coke, and low temperature fluidity of lubricating oil products, etc.

Inactive Publication Date: 2008-03-26
胡波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity index improver obtained by dissolving ethylene-propylene dry gum in 150SN base oil has the following disadvantages: 1. It has a great impact on the low-temperature fluidity of lubricating oil products. The more you add, the worse the low-temperature flow will be. The higher the starting temperature requirement when starting the engine, the easier it is to cause damage to the engine when starting the engine at low temperature, or even fail to start
2. When the engine oil is in a high-temperature working state, the added ethylene-propylene copolymer is very prone to coke, causing engine bearing wear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: After mixing alkylbenzene synthetic oil and ethylene-propylene dry gum in a weight ratio of 9:1, they were thermally dissolved at high temperature.

[0007] The product test result of this embodiment:

[0008] project

[0009] The product in this example has good shear resistance, thickening ability, excellent low-temperature pumpability and pour point depressing effect, and is suitable for preparing high-grade internal combustion engine lubricating oil, auxiliary viscosity index agent for gear oil, and thickener for lubricating grease . This product can be used to produce multi-grade oils for 5W, 10W, 15W, 20W internal combustion engines, meeting the requirements of high-end internal combustion engines such as API, SL, SJ, SH, SG, CI-4, CF-4, etc. Products above 15W have a low-temperature pour point depressant effect, and basically do not need to add other pour point depressants.

Embodiment 2

[0010] Example 2: After mixing the alkylbenzene synthetic oil and the ethylene-propylene dry gum in a ratio of 8:2 by weight, they were thermally dissolved at high temperature.

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PUM

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Abstract

The present invention relates to viscosity index improver, and is especially one kind of pour point lowering viscosity index improver comprising synthesized alkyl benzene oil 80-95 wt% and dry ethylene-propylene glue 5-20 wt%. Synthesized alkyl benzene oil and dry ethylene-propylene glue in the said ratio are mixed, and heated to dissolve and crack macromolecular and branched chain structure to obtain ordered molecule arrangement of the ethylene-propylene copolymer and raised low temperature performance. The viscosity index improver can raise the low temperature performance of oil product, lower the pour point of paraffin-base basic oil, and raise the performance of lubricating oil, including raised dispersivity, lowered cokability and raised high temperature thickening.

Description

technical field [0001] The invention relates to a viscosity index improver, in particular to a pour point depressing type viscosity index improver. Background technique [0002] The existing viscosity index improver is also called ethylene-propylene copolymer. The conventional production method is to use ethylene-propylene dry glue to dissolve in 150SN base oil. The ethylene-propylene copolymer can be used as thickening and viscosity index improver, grease thickener. However, the viscosity index improver obtained by dissolving ethylene-propylene dry gum in 150SN base oil has the following disadvantages: 1. It has a great impact on the low-temperature fluidity of lubricating oil products. The more you add, the worse the low-temperature flow will be. The higher the starting temperature requirement when starting the engine, the easier it is to cause damage to the engine when starting the engine at low temperature, or even fail to start. 2. When the engine oil is in a high-tem...

Claims

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Application Information

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IPC IPC(8): C10M143/02C10M105/06C10N20/02C10N30/02
Inventor 胡波
Owner 胡波
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