Table 3. Curing Characteristics of CR Compounds at 170°C

Silica type	Rubber compounds	MH (dNm)	ML (dNm)	ΔM (dNm)	T90 (min)	TS2 (min)	CRI (min-1)
VN3	S0-CR	20.5	1.28	19.2	18.1	2.94	6.6
	S20-CR	35.0	2.40	32.6	26.4	2.32	4.2
	S40-CR	48.5	3.77	44.7	29.6	2.23	3.7
	S60-CR	83.5	11.8	71.7	24.9	1.51	4.3
	S70-CR	100.5	17.4	83.2	30.8	0.29	3.3
	S80-CR	110.0	21.0	89.0	31.4	0.14	3.2
Z175	S0-CR	20.5	1.28	19.2	18.1	2.94	6.6
	S20-CR	32.2	1.77	30.4	27.0	2.42	4.1
	S40-CR	45.7	3.37	42.3	27.8	2.30	3.9
	S60-CR	57.8	6.36	51.4	29.4	2.29	3.7
	S70-CR	97.7	20.7	76.9	33.1	1.15	3.1
	S80-CR	117.9	27.7	90.2	34.3	0.23	2.9
U7000	S0-CR	20.5	1.28	19.2	18.1	2.94	6.6
	S20-CR	33.1	2.51	30.6	28.1	2.70	3.9
	S40-CR	48.5	4.51	44.0	33.8	2.53	3.2
	S60-CR	73.9	12.3	61.1	30.4	1.60	3.5
	S70-CR	86.7	18.1	68.7	26.7	1.01	3.9
	S80-CR	105.4	23.9	81.5	33.2	0.43	3.1