Abstract:
Formulated silane (also called as silane cocktail) SLC-R is a high speed silane formula from Capatue which is designed for use in one-step Monosil process, Spherisil Process and Soaking Compound Process silane-crosslinking of PE and ethylene copolymers for the power cable industry.
Formulated Silane SLC-R is a clear, colorless to yellow liquid (the product can darken) which contains: vinyl silane, peroxide grafting-initiator and tin catalyst (for moisture cure). Its crosslinking vinyl silane incorporates grafting and crosslinking catalysts in a ratio suitable for crosslinking polyethylene in commercially available extrusion equipment. Formulated Silane SLC-R modifies polyethylene resins chemically during melt processing (i.e., extrusion) and efforts polymer crosslinking upon exposure of the fabricate polyethylene to moisture.
Equivalents:
Product |
Supplier |
Silcat® R |
Momentive (formerly OSi Specialties) |
Typical Properties:
Index |
Value |
Appearance |
Clear liquid. |
Color |
Light straw |
Specific Gravity at 25/25℃ |
0.976 |
Viscosity at 25℃, cst |
0.7 |
Benefits of Silane XLPE:
The heat resistance is the main reason for using silane XLPE in the cable & wire and pipe application. Furthermore crosslinking can also improve the following properties of the polymer:
Chemical resistance
Impact strength and tensile strength
Aging resistance
Creep resistance under load
Abrasion resistance
Memory effect
Reactivity:
The following reactions describe the basic chemistry:
Formulated silane SLC-R is suitable for the preparation of moisture-curing polymers. The characteristic feature of this process is grafting of the vinyl silane to the polymer during extrusion.
After the grafting, the polymer can still be processed as a thermoplastic. Only during treatment with moisture which is usually carried out in a water bath (80℃~100℃), steam bath or even at ambient conditions, the polymer chains are linked together, thereby forming a crosslinking polymer. This reaction is accelerated by using a catalyst. SLC-R contains the constituents which are necessary for both steps.
Packing:
The regular packing of this product is 25kg plastic pail, 200L steel drums and 1000L immediate bulk container.
Storage and Shelf Life:
Should be stored in dry, cool, ventilated room; keep away from water, moisture, high temperature and fire. This product has a shelf life of at least 7 months if stored in tightly closed original container at room temperature.
The containers must remain tightly sealed during storage and kept in a cool, well aired place. Protect against humidity.
CAUTION: NEVER STORE THIS PRODUCT ABOVE 55℃ (131℉)!
If this product is kept beyond the shelf life recommend on the product label, it is not necessarily unusable, but a quality control should be performed on the properties relevant to the application.
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