Table 1. Formulations of Silica Filled SBR Compounds with Surfactant & TDAE Oil

(unit:phr)		S40-Ref	S60-Ref	S40-S6	S60-S6	S40-O6	S60-O6
Step 1	SSBR	100	100	100	100	100	100
	Silica	40	60	40	60	40	60
	TESPD	3.2	4.8	3.2	4.8	3.2	4.8
	Surfactant	-	-	6	6	-	-
	TDAE Oil	-	-	-	-	6	6
	ZnO	3	3	3	3	3	3
	S/A	2	2	2	2	2	2
	6PPD	1	1	1	1	1	1
Step 2	Sulfur	1.5	1.5	1.5	1.5	1.5	1.5
	CBS	1.5	1.5	1.5	1.5	1.5	1.5
	DPG	1.5	1.5	1.5	1.5	1.5	1.5