YPC-GPRO (Nanjing) Rubber Co.,Ltd produces styrene－butadiene rubber (SBR) with trademark “Yangzi”. Yangzi products include SBR-1500, SBR-1502, SBR-1712, etc.
    Styrene－butadiene rubber (SBR) is the most widely used rubber with the largest production & sale volume among all synthetic rubbers. Yangzi SBR are produced through emulsion polymerization of butadiene and styrene at low temperature with redox polymerization initiators. The main process include free radical emulsion copolymerization, intermingle, agglomeration, etc.
　　SBR has the broadest applications in the manufacture of automobile tires, shoe soles, conveyor belts, rubber tubing and many others.
　　Compared with natural rubber, proper compounding is expected to give SBR of higher resistance to abrasion, heat, aging, ozone and water. SBR also provides excellent uniformity and airtight capability. SBR can mix with natural rubber with any proportion to produce rubber.

SBR-1500(GB8655-88)
Staining & non-oil extended grades. SBR-1500 raw rubbers have excellent adhesivity and processability. The vulcanized rubbers have good abrasion resistance, tensile strength, tearing strength, and aging resistance. Not suitable for bright or transparent articles for the reason of containing dark antioxidant.
Applications: Widely used in products with carbon blacks as reinforcing fillers and having low requirement on color, such as Tire, Conveyor belt, Rubber tubes, Black shoe soles, Rubber gasket, Rollers for paddy pounder, molded and extruded articles, and other products using carbon black fillers.

SBR-1502(GB/T12824-2002)
Non-staining & non-oil extended grades. SBR-1502 raw rubbers have light color and their performance is almost equivalent to SBR-1500 with good tensile strength, abrasion resistance, and bending (flexibility).
Applications: Widely used in rubber articles with bright and light colors, such as Side wall tyres, Transparent rubber overshoes, Rubber tapes, medical products.

SBR-1712 (SH/T1626-2005)
Staining & oil-extended grade. SBR-1712 has high molecular weight and contains about 30% of highly aromatic oil, together with excellent processability, adhesivity, and abrasion resistance. Much lower price with respect to non-oil extended grades. Suitable for products of deep color.
Applications: Tires, Conveyor belt, Rubber tubes, Rubber overshoes, and other black rubber articles.