Transcript
VISCOPLEX® Automotive Gear Oil Viscosity Index Improver Efficient and full multigrade performance across broad operating temperatures
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Evonik – your dedicated partner for viscometric solutions in high performance lubricants Evonik Oil Additives is a leading global supplier of high-performance lubricant additives and synthetic base fluids marketed under the brand names VISCOPLEX® and VISCOBASE® for use in automotive and industrial lubricants. State-of-the-art technology centers, worldwide manufacturing facilities and a global supply chain enable us to provide customized products and solutions to our customers around the world. As modern transmissions evolve, efforts to satisfy emissions and fuel economy targets, fluid durability and owner expectations of reliability, drive quality and shift control lead to increased complex gear design. Sophisticated gear train, system control technology, fluid heat management and the need for complete lubrication demand lubricant additives of the highest performance level.
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With our strong dedication to innovation and customer satisfaction, Evonik Oil Additives offers the broadest range of polyalkylmethacrylate (PAMA) viscosity index improver products to serve the automotive gear oil market. VISCOPLEX® VI improvers will help you to strike optimal balance of thickening efficiency and shear stability in a variety of base stocks of your choice. Multigrade gear oil formulations using VISCOPLEX® products can enjoy wide operating temperature range, providing a smooth start in the coldest winter and adequate hardware protection under extreme high heat. Our experienced technical experts are committed to offering our customers with the highest quality of products and services, creating energy efficient and cost-effective solutions to your multigrade gear oil formulations and enabling you to stay ahead of competition on a global stage.
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Modern gear oils: increasing demand on viscometric performance SAE J306 is the international standard for automotive gear oil formulation that defines gear lubricant viscosity at low and high temperatures. Several key revisions were implemented since SAE J306 was first issued in 1991: • Additional new viscosity grades to seize the balance between fuel economy vs. longevity of equipment • Stay-in-grade viscosity requirement applied to oils after severe mechanical shear test, CEC L-45-A-99 (KRL Test, 20 hours), to ensure optimal protection throughout the lifespan of the hardware
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These changes were implemented to characterize modern lubricant performance for the most current gear design and metallurgy development, adapt to the increasingly stringent OEM fuel economy and CO2 emission requirements, and counter increasingly harsher mechanical environment of modern gears. The new demands pose challenges to lubricant formulation developers, but also present opportunities to improve product robustness and differentiate from competition. Evonik VISCOPLEX® PAMA gear oil VI improver products and our technical experts are dedicated to designing modern gear oil formulations with optimum performance to support our customers.
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SAE J306 JUNE 2005 automotive gear lubricant viscosity classification Temperature for viscosity of 150,000 mPa•s1
Kinematic viscosity at 100 °C (mm2/s)
Maximum
Minimum2
Maximum
70W
-55 °C
4.1
–
75W
-40 °C
4.1
–
80W
-26 °C
7.0
–
85W
-12 °C
11.0
–
80
–
7.0
< 11.0
85
–
11.0
< 13.5
90
–
13.5
< 18.5
110
–
18.5
< 24.0
140
–
24.0
< 32.5
190
–
32.5
< 41.0
250
–
41.0
SAE viscosity grade
ASTM D2983 Minimum viscosity after 20h. KRL test (CEC-L-45-A-99) Reprinted with permission from SAE J306, ©2005 SAE International. 1 2
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VISCOPLEX® gear oil VI improver: outstanding product performance and formulation flexibility With over 70 years of experience as an innovative solution provider in lubricant viscometric performance, Evonik Oil Additives has mastered the art of lubricant formulations. Our VISCOPLEX® gear oil VI improvers offer outstanding performance in thickening efficiency, shear stability and low temperature fluidity with excellent filterability and oxidation stability. Combined with premium DI packages, it helps formulators to design cost-efficient, highly robust multigrade gear oils with broad operating temperature windows for transmissions, transfer cases and differentials. Flexibility in base oil selection is highly desirable in designing lubricant formulation, in order to achieve greater adaptability to supply variation and to establish favorable formulation economics. The proper choice of base oils, however, also dictates viscometric performance of multigrade gear oils,
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particularly in meeting low temperature standards. Proper selection of a VI improver is essential to accomplish all of these requirements. For example, VISCOPLEX® 0-050 is a robust PAMA VI improver that is capable of satisfying the stringent SAE 75W-90 viscometric demands even in the mostly Group I based formulation. Various SAE J306 viscosity grades of gear oils involve different formulation strategies and may call for different VI improvers. With careful design of VI improver composition, it is possible to develop a single product to fulfill SAE J306 specifications of various viscosity grades. VISCOPLEX® 0-050 demonstrates such versatility by combining appropriate base oils and the use of pour point depressant (PPD) to exceed the requirements in SAE 75W-90, 75W-85, 75W-80 and 80W-140 gear oils.
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VISCOPLEX® 0-050 for SAE 75W-90 formulations in various base stocks Formulation
Group I
Group II
Group III
Group IV
VISCOPLEX® 0-050
%
28.2
25.0
24.0
24.0
Gear oil package
%
6.5
6.5
6.5
6.5
Group I base oil, 150N
%
50.3
–
–
–
Group II base oil, 150N
%
–
68.5
–
–
Group III base oil, 6cSt
%
–
–
69.5
–
PAO 4
%
15.0
–
–
–
PAO 6
%
–
–
–
69.5
Kinematic viscosity, 100 °C
mm /s
16.36
16.15
15.86
14.55
Brookfield viscosity @ -40 °C
mPa•S
130,000
122,000
109,000
27,500
13.72
13.70
13.68
13.72
2
Shear stability test, CEC L-45-A-99 (20h. KRL) After shear viscosity, 100 °C
mm2/s
Viscosity stay-in grade?
Single VI Improver (VISCOPLEX® 0-050) to meet viscometric and shear stability requirement of SAE 75W-90, 75W-85, 75W-80 and 80W-140 grades Viscosity grade
75W-90
75W-85
75W-80
80W-140
VISCOPLEX® 0-050
%
22.4
17.5
7.8
30.5
Gear oil package
%
7.5
3.8
3.8
5.3
PPD
%
–
–
0.4
0.5
Group I, 175SN
%
10.0
18.0
55.0
–
Group II, 150N
%
60.1
60.7
33.0
–
Group I, 150SN
%
–
–
–
41.7
Brightstock
%
–
–
–
22.0
Kinematic viscosity, 100 °C
mm2/s
15.4
12.2
8.4
30.1
163
158
142
156
125,000
133,000
132,000
114,000
13.6
11.1
7.8
25.1
Viscosity index Brookfield viscosity @ -40 °C
mPa•S
Shear stability CEC L-45-A-99 (20h. KRL) After shear viscosity, 100 °C
mm2/s
Viscosity stay-in grade?
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Offering a wide range of solutions Evonik Oil Additives offers a wide range of VISCOPLEX® VI Improver products to meet your formulation challenges. By thorough evaluation of customers’ specific formulations, rigorous laboratory testing of our products in a variety of
equipment, and ongoing discovery of next generation VI improvers, our experienced technical experts thrive to provide you with customized viscometric solutions, creating added values and new opportunities for your products.
Selected Evonik VI improver products for gear oils Product code
PSSI1
Applications
VISCOPLEX® 0-022
8
For most stringent OEM requirements
VISCOPLEX® 0-030
8
For most stringent OEM requirements
VISCOPLEX® 0-050
20
For all SAE J306 grades, optimized for group III base oils
VISCOPLEX® 0-101
25
For all SAE J306 grades, optimized for group III base oils
VISCOPLEX® 0-110
30
For all SAE J306 grades
VISCOPLEX® 0-120
35
For selected SAE J306 grades
VISCOPLEX® 0-219
40
For selected SAE J306 grades
VISCOPLEX® 0-220
45
For selected SAE J306 grades
VISCOPLEX® 0-400
66
For maximum thickening efficiency
1
8
CEC-L-45-A-99, 20 hours
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Evonik gear oil VI Improver products enhance gear operating efficiency In addition to excellent viscometric control and formulation flexibility, VISCOPLEX® PAMA VI improvers provide an extra benefit of enhancing transmission efficiency, according to FZG efficiency test (VW PV1456). When comparing with
monograde gear oil, the use of PAMAbased multigrade formulations deliver significantly less torque loss over test temperature range, consequently improving gear operating efficiency.
Torque loss (Nm)
SAE 75W-90 gear oil FZG transmission efficiency1 improvement vs. SAE 90 8 7 6 5 4 30
40
60
50
70
80
90
100
110
120
130
140
150
Oil temperature (ºC ) SAE 90
SAE 75W-90
FZG efficiency test condition: 238 Nm applied torque, 2000 rpm
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PAMA VI improvers, with lower traction coefficient and higher VI contribution, are more robust in transmission efficiency improvement than other VI improver
chemistry, such as polyisobutylene (PIB). The advantage is particularly pronounced in the city driving mode (low load, low temperature).
% efficiency increase vs. SAE 90
FZG transmission efficiency1 improvement vs. SAE 90 by various VI improver chemistry City driving operating mode
6 5 4 3 2 1
0
25
50
75
100
125
150
175
200
225
250
275
300
Applied torque (Nm) SAE 75W-90 (PAMA)
SAE 80W-90 (PIB)
Test temperature = 20 °C
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Evonik PAMA gear oil VI improver products minimize operating temperatures of multigrade gear oils Modern vehicle design emphasizes higher engine output, smaller transmission hardware and aerodynamic body styling. These conditions have led to higher operating temperatures inside the gearbox, resulting in higher rate of oxidation, higher wear, shorter oil life and poorer fuel economy. One of the most efficient and rapid tools to predict the operating temperature in gear lubricants is the Axial Groove Ball Bearing test (ARKL, stands for Achsial-Rillen-KugelLager). It was found to correlate well with the vehicle chassis dynamometer test.
Our extensive research using the ARKL test demonstrates that multigrade gear oils containing PAMA VI improver can reduce operating temperature considerably compared to monograde oils and multigrade formulations with PIB. The test results from ARKL and FZG efficiency tests clearly demonstrate the benefit of our PAMA VI improver in offering gear efficiency improvement, oil lifespan extension and adequate equipment protection.
In SN 150 oil
In PAO4
Influence of VI improver on ARKL end of test temperature
90
95
105
100
110
115
120
125
130
135
End of test temperature (°C) PAMA 1
10
PAMA 2
PIB
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We are ready to create a solution for your gear oil formulation needs.
ViscoPlex® offers key features to optimize your automotive efficiency and performance – fuel economy, cost
Email our gear oil experts or visit our site for detailed product information.
effectiveness, global supply, tailored solutions, increased hardware endurance, efficiency and cleanliness.
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This information and all further technical advice is based on our present knowledge and experience. However, they imply no liability or other legal responsibility on our part, including with regard to existing third party intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments. The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be verified by testing, which should be carried out only by qualified experts in the sole responsibility of the customer. Reference to trade names used by other companies is neither a recommendation, nor does it imply that similar products could not be used. VISCOPLEX® is a registered trademark of Evonik RohMax Additives GmbH. ©04/2013 Evonik Industries AG
Europe, Africa, Mideast Evonik Industries AG Kirschenallee 64293 Darmstadt Germany
Americas Evonik Oil Additives USA, Inc. 723 Electronic Drive Horsham, PA 19044-4050 USA
phone +49 6151 18-09 fax +49 6151 18-4100
phone +1 215 706-5800 fax +1 215 657-9241 Toll-Free +1 888 876-4629
evonik.com/oil-additives
[email protected]
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