Isoprene → HCID 19842620, compound

HRID 1819522Notes

Reaction equation

HRID 1819522 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH2:9]=[CH:10][C:11](=[CH2:13])[CH3:12].C([Li])CCC.O1CCCC1>C1CCCCC1>[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH2:9]=[CH:10][C:11](=[CH2:12])[CH3:13].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

6

Reactant 4

HCID 6557IsopreneHCID 7501Styrene2×HCID 8028TetrahydrofuranHCID 178418339Butyllithium

Product 1

HCID 19842620HCID 19842620, compound

Reagents, catalysts & solvents 1

HCID 8078CyclohexaneSolvent

Procedure

The polymerization was conducted in cyclohexane by successively introducing styrene, isoprene and styrene into a reactor in this order in the presence of an n-butyllithium polymerization catalyst and tetrahydrofuran, to produce a styrene-isoprene-styrene triblock copolymer. The block copolymer thus produced was hydrogenated in cyclohexane in the presence of a Ziegler hydrogenation catalyst under a hydrogen pressure of 1.96 MPa (20 kg/cm2), to produce the titled hydrogenated triblock copolymer (hereinafter referred to merely as “block copolymer (II-1)”).

Sources & evidence

ORD record
ord-a566b6efc4814082b2f15c89a965654e
Source dataset
uspto-grants-2009_10
Patent number
US07601778B2

Reaction notes

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