Isoprene → Styrene

HRID 453479Notes

Reaction equation

HRID 453479 reaction equation
[CH2:1]=[CH:2][C:3](=[CH2:5])[CH3:4].[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1>>[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[CH2:1]=[CH:2][C:3](=[CH2:4])[CH3:5].[CH2:1]=[CH:2][C:3]1[CH:4]=[CH:8][CH:7]=[CH:6][CH:5]=1.[CH2:1]=[CH:2][C:3]1[CH:4]=[CH:8][CH:7]=[CH:6][CH:5]=1

Participants

4

Reactant 2

HCID 6557Isoprene2×HCID 7501Styrene3×

Product 2

HCID 7501StyreneHCID 19842620HCID 19842620, compound

Procedure

Further subsequently, with temperature controlled so as to keep the system at 50 to 60° C., 2.88 kg of isoprene was continuously added to the reactor, taking 1 hour. After the addition of styrene, this was further polymerized for 1 hour. The polymerization conversion of isoprene was 100%. After this, 1.99 kg of styrene was continuously added to the reactor, taking 30 minutes. After the addition of styrene, this was further polymerized for 1 hour thereby giving two types of styrene/isoprene/styrene block copolymers with one of the respective two styrene blocks having a different molecular weight from each other. The polymerization conversion of styrene was 100%.

Workup

  1. customat 50 to 60° C.
  2. customthis was further polymerized for 1 hour
  3. waittaking 30 minutes
  4. customthis was further polymerized for 1 hour

Sources & evidence

ORD record
ord-b7e106236f67431b89d04799599efada
Source dataset
uspto-grants-2013_07
Patent number
US08492480B2

Reaction notes

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