Isoprene → HCID 19842620, compound

Participants

Reaction Steps

Using 120 g of sec-butyl lithium (10% by weight, cyclohexane solution), 1,650 g of styrene, 6,700 g of isoprene and 1,650 g of styrene were successively polymerized in the same manner as in Reference Example 5. Thus, a styrene-isoprene-styrene type block copolymer was obtained. The block copolymer obtained was subjected to hydrogenation under the same conditions as in Reference Example 1 to give a hydrogenated product of the block copolymer (hereinafter simply referred to as "SEPS-2"). The SEPS-2 thus obtained had a number average molecular weight of 101,600 and a styrene content of 35% by weight, where the ratio of hydrogenation was 98.9%.

Provenance & Evidence