Isoprene → HCID 86593707, compound

HRID 1938656Notes

Reaction equation

HRID 1938656 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH:9]([Li])([CH2:11][CH3:12])[CH3:10].C=CC(=C)C.C=CC=C>CO.C1CCCCC1>[CH2:1]=[CH:2][C:3](=[CH2:4])[CH3:8].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH2:10]=[CH:9][CH:11]=[CH2:12].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

7

Reactant 4

HCID 6557IsopreneHCID 7501Styrene2×HCID 78451,3-ButadieneHCID 178418400CID 53628100

Product 1

HCID 86593707HCID 86593707, compound

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8078CyclohexaneSolvent

Procedure

Into a reaction vessel with a stirrer, 50 kg of cyclohexane, 1,400 g of well dehydrated styrene and 105 g of sec-butyl lithium (10% by weight, cyclohexane solution) were charged to carry out polymerization at 60° C. for 60 minutes. Next, 7,200 g of a mixture of isoprene and butadiene (weight ratio: 50/50) was added to carry out polymerization for 60 minutes, and 1,400 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/butadiene-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 "SEEPS"). The SEEPS thus obtained had a number average molecular weight of 103,400 and a styrene content of 28% by weight, where the ratio of hydrogenation was 97.3%.

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-74165af2ebe94bba931de83b64df0954
Source dataset
uspto-grants-1997_12
Patent number
US05693711

Reaction notes

Loading…