Isoprene → HCID 19842620, compound

HRID 1938654Notes

Reaction equation

HRID 1938654 reaction equation
C1CCCCC1.[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C([Li])(CC)C.[CH2:20]=[CH:21][C:22](=[CH2:24])[CH3:23]>CO>[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[CH2:20]=[CH:21][C:22](=[CH2:23])[CH3:24].[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1

Participants

6

Reactant 4

HCID 6557IsopreneHCID 7501Styrene2×HCID 8078CyclohexaneHCID 178418400CID 53628100

Product 1

HCID 19842620HCID 19842620, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Into a reaction vessel with a stirrer, 50 kg of cyclohexane, 1,750 g of well dehydrated styrene and 175 g of sec-butyl lithium (10% by weight, cyclohexane solution) were charged to carry out polymerization at 60° C. for 60 minutes. Next, 6,500 g of isoprene was added to carry out polymerization for 60 minutes, and 1,750 g of styrene was further added to carry out polymerization for 60 minutes. Thereafter, methanol was added to terminate the reaction. 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-1"). The SEPS-1 thus obtained had a number average molecular weight of 53,000 and a styrene content of 35% by weight, where the ratio of hydrogenation was 98.9%.

Workup

  1. custompolymerization at 60° C. for 60 minutes
  2. custompolymerization for 60 minutes
  3. custompolymerization for 60 minutes
  4. customto terminate
  5. customthe reaction

Sources & evidence

ORD record
ord-77241fece8af412b9a93b04b07187fc2
Source dataset
uspto-grants-1997_12
Patent number
US05693711

Reaction notes

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