MODIFIED SULPHUR CCS
Surface Treated Sulphur for Improved Dispersion.
Material : Treated / Modified Sulphur
Appearance : Yellow Powder
Ash, % : 1.0 Max.
Mesh Size : 200 Min.
Moisture, % : 1.0 Max.
Sulphur Dispersion has always been problem for rubber industry. This is particularly true for Nitrile Rubber, to
some extent Polychloroprene and EPDM Rubber.
CCS has been electrically / chemically surface treated to avoid agglomeration. This electric charge allows the
particles to disperse well in rubber matrix. It very effectively replaces Magnesium Carbonate Coated Sulphur.
Advantages of Using CCS:
- Avoids blooming during storage of green compound.
- No formation of aggregates appears in the rubber avoiding local over cure.
- Improved dispersion provides higher physical properties, both before and after ageing.
- In dynamic applications it provides higher service life. E.g. in rice dehusking rollers. Due to local burning and presence of phenolic resin in the product, failure of the product can be earlier and erratic. Proper dispersion of sulphur avoids such failure.
- In coloured applications, uniform dispersion of sulphur is very important, which is provided by CCS. Due to this brown spots are not observed on the surface.
- Rice Dehusking Rollers
- Football Cover
- Textile Cots and Aprons
- LPG Tubing
- Textile blankets and Rolls
- Oil Seals and O Rings based on NBR.
CCS treated sulphur should be mixed as usually followed for various rubbers. For Nitrile Rubber, it should be added immediately after rubber is warmed up and forms the band on the mill. For soft compounds, it can be added at the last stage of mixing. Tight nip refining will help further improvement in dispersion of CCS.
Please find below the classic example of ageing properties and compounding comparison: