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Novel viscosity index improver

A viscosity index improvement and viscosity index technology, applied in the direction of additives, petroleum industry, lubricating compositions, etc., to achieve the effects of excellent low temperature performance, excellent shear resistance performance, and excellent thickening ability

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, polyamide-amine molecules have not been reported in the literature as viscosity index improvers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of embodiment 1 viscosity index improver

[0042](1) Put silica gel in a round bottom flask, add 0.2mol / L sodium hydroxide aqueous solution, and react at 50°C for 6h under electric stirring. After the reaction was completed, the product was filtered under reduced pressure, rinsed repeatedly with deionized water, and the filtrate was detected with pH test paper until the filtrate was detected to be neutral, then washed with methanol, and finally vacuum-dried to constant weight for future use. Weigh 5g of activated silica gel and place it in a flask, add 20mL of silane coupling agent (KH550 3-aminopropyltriethoxysilane) toluene solution with a volume concentration of 10% dropwise, and react for 60min at a temperature of 50°C , After cooling down to room temperature, it was filtered under reduced pressure, washed with methanol, and then dried in a vacuum oven at 70°C for 12h.

[0043] (2) Place 5 grams of the product obtained after silanization in a flask,...

Embodiment 25G

[0059] Embodiment 25G PAMAM-V is used for diesel engine oil as a viscosity index improver

[0060] According to the formulation in Table 3, CF-4 5W-30 diesel engine oil was formulated with 5G PAMAM-V as a viscosity index improver.

[0061] Table 3 CF-4 5W-30 Diesel Engine Oil Formula

[0062]

[0063]The analysis results of two kinds of CF-45W-30 diesel engine oil prepared are shown in Table 4:

[0064] Table 4 Analysis results of CF-4 5W-30 diesel engine oil

[0065]

[0066]

[0067] It can be seen from the above table that after adding 5G PAMAM-V viscosity index improver, its shear resistance, 100°C kinematic viscosity, low-temperature pumping viscosity, and low-temperature dynamic viscosity are all significantly improved, which shows that 5G PAMAM-V -V is a very good viscosity index improver.

Embodiment 3

[0068] Example 3 7G PAMAM-V is used as a viscosity index improver for gasoline engine oil

[0069] According to the formula in Table 5, SN / GF-50W-20 gasoline engine oil was formulated with 7G PAMAM-V as the viscosity index improver and OCP, which is a common viscosity index improver in the market.

[0070] Table 5 SN / GF-5 0W-20 gasoline engine oil

[0071]

[0072] The analysis results of the two SN / GF-50W-20 gasoline engine oils formulated are shown in Table 6:

[0073] Table 6 Analysis results of SN / GF-5 0W-20 gasoline engine oil

[0074]

[0075] From the analysis data in Table 6, it can be seen that the SN / GF-5 0W-20 oil formulated with 7G PAMAM-V viscosity index improver has the highest performance in terms of shear resistance, kinematic viscosity at 100°C, low temperature pumping viscosity, and base number. The performance of 7G PAMAM-V is obviously better than that of oil formulated with OCP viscosity index improver, which shows that 7G PAMAM-V is a very good vi...

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Abstract

The invention provides a novel viscosity index improver. The novel viscosity index improver is a polyamide-amine polymer having a structural formula of Si(OCH3)3(CH2)3N(2<n+1>-1)[(CH2)2CONH(CH2)2NH](2<n+2>-2)(C12H25)2<n+1>, wherein n is more than or equal to 0 and less than or equal to 10. Polyamide-amine dendrimers are one type of novel nano-scale molecules having three-dimensional and ordered heights, and as the molecules have the advantages of fine structure, branched height, controllable molecular weight and the like, the molecules can be applied to the aspects of lubricating oil, grease lubricant, foods and the like.

Description

technical field [0001] The invention relates to a viscosity index improver, in particular to a polyamide-amine polymer used as a viscosity index improver. Background technique [0002] At present, the common viscosity index improvers are chain polymers with moderate oil solubility, such as polyisobutylene (PIB), ethylene-propylene copolymer (OCP), polymethacrylate (PMA), etc. These viscosity index improvers are generally in the shape of irregular coils, like cotton yarn balls, and their molecules can exist in a state of linear expansion or contraction depending on the type of base oil used and the temperature it is exposed to. For example, when the temperature rises and the viscosity of the base oil decreases, the solubility of the viscosity additive in the oil increases, the cotton-like polymer loosens, and the volume becomes larger, thereby increasing the resistance of the oil flow, which means increasing the viscosity of the oil. The viscosity of the product plays a role...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M149/18C08G69/48C10N30/02
Inventor 鄂红军隋秀华朱和菊耿志勇
Owner CHINA PETROLEUM & CHEM CORP