CN101082012A - Ethylene-propylene copolymer viscosity index improver and preparation and application thereof - Google Patents
Ethylene-propylene copolymer viscosity index improver and preparation and application thereof Download PDFInfo
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- CN101082012A CN101082012A CN 200710017941 CN200710017941A CN101082012A CN 101082012 A CN101082012 A CN 101082012A CN 200710017941 CN200710017941 CN 200710017941 CN 200710017941 A CN200710017941 A CN 200710017941A CN 101082012 A CN101082012 A CN 101082012A
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Abstract
The present invention provides one kind of viscosity index improver of ethylene-propylene copolymer. The viscosity index improver is prepared with base oil in 75-88 wt% and ethylene-propylene rubber in 12-25 wt%, and through mixing in a normal pressure sol degrading kettle, heating to 95-140 deg.c slowly, and stirring at constant temperature for 3-10 hr. The viscosity index improver for modulating high grade internal combustion engine oil has high thickening capacity of 0.85-0.96 sq mm/s, low shear stability index below 20 %, outstanding low temperature performance, and small added amount of 6.5-8 %.
Description
Technical field
The invention belongs to petrochemical industry, the preparation method who relates to a kind of lubricating oil viscosity index improver, relate in particular to a kind of ethylene-propylene copolymer viscosity index improver and preparation method thereof, the invention still further relates to the application of ethylene-propylene copolymer viscosity index improver in the modulation I. C. engine oil simultaneously.
Background technology
Viscosity index improver is tackifier again, is mainly used in I. C. engine oil, hydraulic efficiency oil, automatic transmission fluid and the gear oil, and its consumption is only second to purification agent and dispersion agent in the lubricating oil additive scope.Viscosity index improver is the oil soluble chain-like macromolecule compound, is soluble in the hydrocarbon base oils that is used for lubricant.The polymer coil of viscosity index improver shrinks when low temperature, and is less to the internal friction influence of base oil, thereby also less relatively to the viscosity influence of oil product; The polymer coil swelling of viscosity index improver stretches when high temperature, hydrodynamic volume and surface-area increase, and the internal friction of base oil is significantly increased, and base oil viscosity increases, thereby improved the high temperature lubricating of base oil, reached the purpose of under differing temps, improving the oil viscosity performance.
Viscosity index improver can not only the multiviscosisty base oil, and can change the sticking warm nature of oil product, makes oil product have excellent high-temperature lubrication and low-temperature fluidity, can also reduce the consumption of fuel and lubricating oil, realizes the oil product universalization.In addition, not only require viscosity index improver that anti-oxidative stability, the detergency of oil product are not produced tangible harmful effect, also require thickened oil viscosity loss appropriateness under the mechanical shearing effect.In actual applications, a kind of good viscosity index improver not only requires thickening ability big, shear stability is good, also requires to have good low-temperature performance simultaneously, thermal oxidation stability and have excellent compatibility with other oil dope (as: pour point depressant).Therefore in the development and production process of lubricating oil, note choosing viscosity index improver.
Viscosity index improver commonly used comprises ethylene-propylene copolymer (OCP), polymethacrylate (PMA), polyisobutene (PIB), hydrogenated styrene-isoprene copolymer (HSD) four big classes.Because ethylene-propylene copolymer viscosity index improver (OCP) presents advantages such as high comprehensive performance, low price in engine uses, therefore be used widely and develop.Ethylene-propylene copolymer can obtain by two kinds of approach, and the first is directly synthetic, the molecular weight of strict controlling polymers; It two is second third glue that molecular weight is higher by thermooxidizing and mechano-degradation to certain molecular weight, to satisfy service requirements.
Along with the raising of lubricating oil class, also more and more higher to the requirement of viscosity index improver.Modern engine requires the shear stability of viscosity index improver to get well, and limits again and again on the specification and improves its requirement to shear stability.There is the deficiency of some in viscosity index improver (as viscosity index improver RHY-613, the RHY-614 of oil company, CNPC Lanzhou production) when the modulation I. C. engine oil at present, as: add dosage big (13～16%), the lower (0.42～0.50mm of thickening ability
2/ s), shear stability index higher (26～35%), these characteristics all can directly have influence on the low-temperature performance and the work-ing life of I. C. engine oil.
Summary of the invention
The objective of the invention is in order to overcome the deficiencies in the prior art, a kind of ethylene-propylene copolymer viscosity index improver with high thickening ability, low shear stability index is provided.
Feature of the present invention is to have adopted the ethylene-propylene rubber(EPR) of the base oil of high viscosity index (HVI) and excellent property as raw material, the mode that stirs with thermosol in special normal pressure still is degraded to ethylene-propylene copolymer, obtains the ethylene-propylene copolymer viscosity index improver of excellent property.Its concrete technology may further comprise the steps:
1. base oil and ethylene-propylene rubber(EPR) are joined in the normal pressure colloidal sol degraded still with 75～88%, 25～12% weight percent respectively, stir at normal temperatures it is mixed;
2. slow elevated temperature to 95～140 ℃, and stir 3～10 hours promptly in the constant temperature thermosol.
Wherein base oil can be selected the mineral base oil of different process deep refining for use.It is the ethylene propylene rubber of 5-15 ten thousand that ethylene-propylene rubber(EPR) can be selected number-average molecular weight for use.Also can select number-average molecular weight for use is that 5-10 ten thousand ethylene propylene rubbers and number-average molecular weight are the mixing ethylene-propylene rubber(EPR) of 5-15 ten thousand ethylene propylene rubbers.
Wherein normal pressure colloidal sol degraded still can adopt conventional normal pressure colloidal sol degraded still, also can adopt special normal pressure colloidal sol degraded still: the folding type slurry formula paddle that array has certain folding angle and diameter promptly is installed on the stir shaft of colloidal sol degraded still.The agitator of this structure has good discharge and the property sheared.
The ethylene-propylene copolymer viscosity index improver of the present invention preparation when being applied to modulate I. C. engine oil, joining the ratio of I. C. engine oil weight 6.5%～8% to stir in the I. C. engine oil and got final product in 0.5～2.0 hour.
The viscosity index improver of invention compared with prior art has following beneficial effect:
1, viscosity index improver VM8520 of the present invention and existing viscosity index improver RHY-613,614 compare the higher (0.85～0.96mm of thickening ability
2/ s), shear stability index lower (≤20%), and have more outstanding low-temperature performance, synthetic I. C. engine oil have good temperature pumping and anti-shear performance, can satisfy of the particular requirement of middle and high shelves I. C. engine oil to viscosity index improver.
2, it is little to add dosage in modulation I. C. engine oil process, and the general viscosity index improver that only needs to add modulation I. C. engine oil weight 6.5～8% can obtain good temperature pumping and anti-shear performance.
3, preparation method of the present invention adopts normal pressure thermosol degradation technique, has that technology is simple, cost is low, be easy to characteristics such as suitability for industrialized production.
Embodiment
Be described further below by the preparation and the performance of specific embodiment ethylene-propylene copolymer viscosity index improver of the present invention.
The preparation of embodiment 1, viscosity index improver
Getting mineral base oil A (character of base oil A sees Table 1) 800 ± 50g is base oil, join in the little colloidal sol degraded of the normal pressure still, add homemade binary second third glue (number-average molecular weight is 5-10 ten thousand) 100 ± 50g, import binary second third glue (number-average molecular weight is 5-15 ten thousand) 100 ± 50g, start and stir, be warming up to 95～140 ℃ of stirrings and promptly got viscosity index improver VM8520 product in 6 ± 2 hours.After measured, the thickening ability of gained viscosity index improver is 0.94mm
2/ s, shear stability index are 18.40%.Its concrete determination data sees Table 2.
The preparation of embodiment 2, viscosity index improver
Present embodiment be on production equipment to the scale-up of embodiment 1, the ratio of viscosity index improver compositing formula is identical with example 1, reaction is carried out in normal pressure colloidal sol degraded still.Get base oil A2500 ± 300kg as base oil, add in the normal pressure colloidal sol colloidal sol still, add homemade binary second third glue (number-average molecular weight is 5-10 ten thousand) 250 ± 50kg, import binary second third glue (number-average molecular weight is 5-15 ten thousand) 250 ± 50kg, start and stir, be warming up to 95-140 ℃, constant temperature stirs and promptly got viscosity index improver VM8520 product in 6 ± 2 hours.The thickening ability of gained viscosity index improver is 0.92mm
2/ s, shear stability index are 17.28%.Concrete determination data sees Table 2.
The preparation of embodiment 3, viscosity index improver
Getting base oil B (character of base oil B sees Table 1) 800 ± 50g is base oil, join in the little colloidal sol degraded of the normal pressure still, add homemade binary second third glue (number-average molecular weight is 5-10 ten thousand) 100 ± 50g, import binary second third glue (number-average molecular weight is 5-15 ten thousand) 100 ± 50kg starts stirring, be warming up to 95～140 ℃, constant temperature stirs and promptly got the viscosity index improver product in 6 ± 2 hours.After measured, the thickening ability of gained viscosity index improver is 0.91mm
2/ s, shear stability index are 18.60%.Its concrete determination data sees Table 2.
The preparation of embodiment 4, viscosity index improver
Present embodiment be on production equipment to the scale-up of example 3, the ratio of viscosity index improver compositing formula is identical with example 1, reaction is carried out in normal pressure colloidal sol degraded still.Get base oil B 2500 ± 300kg as base oil, add in the normal pressure colloidal sol colloidal sol still, add homemade binary second third glue (number-average molecular weight is 5-10 ten thousand) 250 ± 50kg, import binary second third glue (number-average molecular weight is 5-15 ten thousand) 250 ± 50kg, start and stir, be warming up to 95-140 ℃, constant temperature stirs and promptly got viscosity index improver VM8520 product in 6 ± 2 hours.The thickening ability of gained viscosity index improver is greater than 0.89mm
2/ s, shear stability index are 18.05%.Concrete determination data sees Table 2.
The character of oily A of table 1 and B
| Project | Base oil A | Base oil B | Test method |
| Kinematic viscosity (40 ℃), mm 2/ s kinematic viscosity (100 ℃), mm 2/ s outward appearance colourity, number viscosity index flash-point (opening), ℃ pour point, ℃ acid number, mgKOH/g | 28.53 5.026 transparent＜0.5 101 202-11 0.018 | 25.8 4.52 transparent＜0.5 86 209-10 0.012 | GB/T 265 GB/T 265 range estimation GB/T 6540 GB/T 1995 GB/T 3536 GB/T 3536 GB/T 4945 |
The performance of table 2 viscosity index improver
| Analysis project | The VM8520 quality index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Test method |
| Kinematic viscosity (100 ℃), mm 2/ s flash-point (opening), ℃ moisture content, % (m/m) mechanical impurity, the dried agent content of % (m/m), % (m/m) thickening ability, mm 2/ s shear stability, diesel fuel nozzle method (100 ℃) shear stable index SSI, % colourity, number low temperature apparent viscosity (CCS) (20 ℃) pour point, ℃ apparent density (20 ℃), kg/m 3 | 2 actual measurements of actual measurement 〉=170≤0.06≤0.08 〉=0.85≤20≤2.0 notes 1 notes | 4,585 193 0.03 0.070 14.08 0.94 18.40＜1.0 3150-13 qualified 857.0 | 4,416 191 0.04 0.074 13.90 0.92 17.28＜1.5 2950-13 qualified 858.0 | 4,255 190 0.03 0.072 14.28 0.91 18.60＜1.0 3250-13 qualified 862.0 | 4,185 192 0.03 0.070 13.88 0.89 18.05＜1.0 3090-13 qualified 863.0 | GB/T265 GB/T3536 GB/T260 GB/T511 SH/T0034 appendix A appendix B GB/T6540 appendix C appendix D estimates GB/T1884-18 85 |
Annotate 1: pour point quality index: smaller or equal to used base oil pour point
Annotate 2: quality index appearance: light yellow or yellow transparent liquid
Appendix A: be the company standard Q/SYRH4001-2002 of lubricating oil branch office of PetroChina Company Ltd.
Appendix B, C, D are the company standard Q/SY RH3001-2002[of lubricating oil branch office of PetroChina Company Ltd. ethylene-propylene copolymer viscosity index improver] regulation the standardization method:
Appendix B: viscosity index improver shear stability assay method (diesel fuel nozzle method);
Appendix C: viscosity index improver low temperature apparent viscosity (CCS) assay method;
Appendix D: viscosity index improver pour point measurement method;
Find out that from the data of table 2 thickening ability of the viscosity index improver of the present invention's preparation is greater than 0.85mm
2/ s, shear stability index≤20% shows that this product has thickening ability height, characteristics that shear stability index is low.This product can satisfy the needs of middle and high shelves multi-stage combustion engine oil temperature pumping and anti-shear performance fully, has reached intended purposes.
The modulation of embodiment 5, I. C. engine oil:
The ratio of I. C. engine oil weight 6.5%～8% joined to stir in the I. C. engine oil got final product in 0.5～2.0 hour.
Claims (6)
1, a kind of preparation method of ethylene-propylene copolymer viscosity index improver comprises following processing step:
1. base oil and ethylene-propylene rubber(EPR) are joined in the normal pressure colloidal sol degraded still with 75～88%, 25～12% weight percent respectively, stir at normal temperatures it is mixed;
2. slow elevated temperature to 95～140 ℃, and stir 3～10 hours promptly in the constant temperature thermosol.
2, the preparation method of ethylene-propylene copolymer viscosity index improver according to claim 1, it is characterized in that: described base oil is a mineral base oil.
3, the preparation method of ethylene-propylene copolymer viscosity index improver according to claim 1, it is characterized in that: described ethylene-propylene rubber(EPR) is that number-average molecular weight is the ethylene propylene rubber of 5-15 ten thousand.
4, the preparation method of ethylene-propylene copolymer viscosity index improver according to claim 1 is characterized in that: described ethylene-propylene rubber(EPR) is that number-average molecular weight is that the ethylene propylene rubber of 5-10 ten thousand and ethylene propylene rubber that number-average molecular weight is 5-15 ten thousand are with 20～80%, 80～20% weight percent blended ethylene-propylene rubber(EPR).
5, the ethylene-propylene copolymer viscosity index improver of method preparation according to claim 1.
6, the application method of the ethylene-propylene copolymer viscosity index improver of method preparation according to claim 1: be ethylene-propylene copolymer viscosity index improver to be joined to stir in the modulation oil with the ratio of modulation weight of oil 6.5%～8% got final product in 0.5～2.0 hour.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649071B (en) * | 2009-04-08 | 2012-01-11 | 上海绿菱特种蜡制品厂 | Production method of environment friendly rubber tire softening agent |
| CN104031195A (en) * | 2013-03-06 | 2014-09-10 | 中国石油天然气股份有限公司 | Preparation method for viscosity index improver |
| CN104531265A (en) * | 2014-12-17 | 2015-04-22 | 宁波市蓝润能源科技有限公司 | Application of hydrogenated styrene-isoprene copolymer for preparing viscosity index improver |
| CN105132081A (en) * | 2015-08-19 | 2015-12-09 | 西京学院 | Preparation method for ethylene-propylene copolymer viscosity index improver |
| CN105733743A (en) * | 2016-03-22 | 2016-07-06 | 中国石油化工股份有限公司 | Process for preparing tackifiers for lubricating oil |
| CN109553781A (en) * | 2018-10-15 | 2019-04-02 | 中国石油天然气股份有限公司 | Bibasic ethylene propylene rubber, the method and its application for improving bibasic ethylene propylene rubber shear stability |
| US10479881B2 (en) | 2015-06-11 | 2019-11-19 | Bridgestone Americas Tire Operations, Llc | Rubber compositions containing viscosity modifier and related methods |
| CN112592751A (en) * | 2020-12-22 | 2021-04-02 | 圣保路石油化工（天津）股份有限公司 | Internal combustion engine oil composite tackifier and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649071B (en) * | 2009-04-08 | 2012-01-11 | 上海绿菱特种蜡制品厂 | Production method of environment friendly rubber tire softening agent |
| CN104031195A (en) * | 2013-03-06 | 2014-09-10 | 中国石油天然气股份有限公司 | Preparation method for viscosity index improver |
| CN104531265A (en) * | 2014-12-17 | 2015-04-22 | 宁波市蓝润能源科技有限公司 | Application of hydrogenated styrene-isoprene copolymer for preparing viscosity index improver |
| US10479881B2 (en) | 2015-06-11 | 2019-11-19 | Bridgestone Americas Tire Operations, Llc | Rubber compositions containing viscosity modifier and related methods |
| US10865291B2 (en) | 2015-06-11 | 2020-12-15 | Bridgestone Americas Tire Operations, Llc | Rubber compositions containing viscosity modifier and related methods |
| CN105132081A (en) * | 2015-08-19 | 2015-12-09 | 西京学院 | Preparation method for ethylene-propylene copolymer viscosity index improver |
| CN105132081B (en) * | 2015-08-19 | 2018-04-06 | 西京学院 | A kind of preparation method of ethylene-propylene copolymer viscosity index improver |
| CN105733743A (en) * | 2016-03-22 | 2016-07-06 | 中国石油化工股份有限公司 | Process for preparing tackifiers for lubricating oil |
| CN109553781A (en) * | 2018-10-15 | 2019-04-02 | 中国石油天然气股份有限公司 | Bibasic ethylene propylene rubber, the method and its application for improving bibasic ethylene propylene rubber shear stability |
| CN109553781B (en) * | 2018-10-15 | 2022-03-01 | 中国石油天然气股份有限公司 | Ethylene propylene rubber, method for improving shear stability of ethylene propylene rubber and application thereof |
| CN112592751A (en) * | 2020-12-22 | 2021-04-02 | 圣保路石油化工（天津）股份有限公司 | Internal combustion engine oil composite tackifier and preparation method thereof |
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