KH-845-4(SG-Si 1289) : Bis(triethoxysilpropyl) tetrasulfide
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This product is equal to Degussa's Si 69, it's chemial name is Bis(triethoxysilpropyl) tetrasulfide, with the cas no is 40372-72-3. It is mainly adopted in tyres, rubber belts, rubber soles, and many other rubber products. It can can bond the non-black pigment to man-made rubber well and improve modulus and abrasion, improve reversion less by equilibrating cure system, provide rubber with good thermal ageing as a vulcanizing agent.