1.synthetic rubber1778, 2.Styrene Butadiene Rubber 1778, 3.SBR 1778rubber 4.SBR1778 For the ... , CR, IR2200,SKI-3S ,BK 1675N, SBS 792 791H 815. Styrene Butadiene Rubber 1778, one of synthetic rubber. SBR 1778 combines ... /naphthenic oil and light colored high molecular weight styrene-butadiene copolymer of 23.5% bound styrene. SBR 1778 combines the physical properties of ...