AN LE-21 Sulfurized Isobutylene(SIB) CAS:68511-50-2 Extreme Pressure EP Antiwear Additive

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US $3,000-4,000 / Metric Tons | 1 Metric Ton/Metric Tons Sulfurized Isobutylene (Min. Order)
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Quick Details
Place of Origin:
Liaoning, China (Mainland)
Brand Name:
Gear oil additive
Extreme Pressure EP Antiwear Additive
General Composition:
Model Number:
AN LE-21
Chemical component:
Sulfurized Isobutylene
light yellow transparent liquid
Gear Oil Additive
1000 Metric Ton/Metric Tons per Month Sulfurized Isobutylene
Packaging & Delivery
Packaging Details
Sulfurized Isobutylene is packed in 200 liter metal drum (net weight: 200kg/drum)
Dalian Port
Lead Time :
delivery time:7-14 days


Our Services

          Here ,you could see the additive enterprise with profession and integrity.

          Here, tailored products will be customized just for you.


          Here ,you will have a bunch of friends with talents and intelligence .

          No need to wait anxiously ,we will follow the direciton of the goods and offer you the report in time.

          Mass of enthusiasm and Chinese food to look forward to your visit to our factory guidance.

          A company would go together with you for your ideas.

            Because of your choosing us ,millions fo people will prefer to use and appreciate your products.

Related Products


Extreme Pressure Anti-wear Additives

Product No.

Chemical Name

AN LE-04


AN LE-05

Bis Nitrogenous Thiophosphoric Derivative

AN LE-06

Tricresyl Phosphate

AN LE-07

Thiophosphoric Acid Diester Amine Salt

AN LE-09

Triphenyl Thiophosphate

AN LE-21

Sulfurized Isobutylene



AN LE-21Sulfurized Isobutylene/SIB

  Extreme Pressure Antiwear Additive

Product Description


AN LE-21 is an extremely effective EP antiwear additive and deemed as main component in today’s gear oils. With high content of Sulfur,AN LE-21 could provide the oils with excellent EP and load-carrying properties. It is useful in protecting equipment under shock-load conditions and working surfaces which experience high loads. AN LE-21 has good oil solubility, light color, less corrosion for the metals and fine compatibilities with the compounds containing phosphorus.AN LE-21 can be widely used for formulating middle-grade and top-grade automotive gear oils and industrial gear oils, the metal processing oils, drilling machine oils, etc.As AN LE-21 is an excellent source of controlled activity sulfur. It could be used in lubricating grease applications where EP and load-carrying capabilities are required.


Key Performance Benefits

Excellent EP antiwear performance

High sulfur content

Low reactivity to copper

Less corrosion for the metals

Fine compatibilities with the compounds


Excellent booster for FZG, Four ball and other EP tests



Used in automotive gear oils and industrial gear oils, the metal processing oils, drilling machine oils, lubricating grease, etc.Its recommended dosage is 1.5-5.0%.



ItemTypical ValueTest Method
Flash Point (COC), °C≥100ASTM D92
Sulfur, m%40-46ASTM D129
Cu-strip Corrosion (121°C, 3h), rating≤3ASTM D130
Four Ball Test,PB(N)780ASTM D2783
Four Ball Test,PD(N)3920ASTM D2783


The related products Anneng could offer several classes of EP Antiwear Additives to meet your needs.

1.Chlorinated Paraffin AN LE-01 

2.Di-n-butyl-phosphite AN LE-04 

3.Derivative of Thiophosphoric Acid with N AN LE-05 

4. Tricresyl Phosphate AN LE-06     

5. Triphenyl thiophosphate AN LE-09

6. Sulfurized Isobutylene AN LE-21




Packaging & Shipping

 Packing:200 liter metal drum (net weight: 200kg/drum)

Shelf Life: 2 years,stored in dry, clean and well ventilated warehouses,lower than 55°C.



Company Information







Q: how do you control your product quality?


A: all of our products have to go through 5 check in the whole producing process make sure the quality strictly comply with TDS we offered for you. SGS is supported as well.


Q: What is the time of delivery ?


A: Usually within 7 working days for one 20 foot container.


3.What kind of package do you supply?


   200L metal drum         Flexibag                 IBC(Tons of barrels)          ISO-ANKT


Q: what’ your advantage? why choose you as my supplier?


1/with twenty years experiences in this field, our products have been exporting to many overseas markets successfully with fantastic feedback.

2/ we have professional engineers with rich experience. we could offer tailored products according to your specific technical parameters of products.

3/we have our own lab and factory with fully automatic equipments, clients could supervise the producing process of order items.


Q: Can I get the free sample?  


A: Yes!  200ml free sample could be offered for your test.


Q: How to get the free sample?


A: the sample will be ready for delivery in 3 days by air after receiving your courier cost or your freight collect express number.