Isoprene → HCID 19842620, compound

HRID 1938655Notes

Reaction equation

C([Li])(CC)C.[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[CH2:14]=[CH:15][C:16](=[CH2:18])[CH3:17]>>[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[CH2:14]=[CH:15][C:16](=[CH2:17])[CH3:18].[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1

Participants

Reactant 3

HCID 6557Isoprene

HCID 7501Styrene2×

HCID 178418400CID 53628100

Product 1

HCID 19842620HCID 19842620, compound

Procedure

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%.

Workup

customwere successively polymerized in the same manner as in Reference Example 5

Sources & evidence

ORD record: ord-5e2aef9d6d884a45941a1f1109c366b0
Source dataset: uspto-grants-1997_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05693711

Reaction notes

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