Styrene → Benzene, ethenyl-, polymer with 1,3-butadiene

HRID 1195195Notes

Reaction equation

HRID 1195195 reaction equation
[CH2:1]1[CH2:6]CC[CH2:3][CH2:2]1.C=CC=C.C([Li])CCC.[CH2:16]=[CH:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>CO>[CH2:16]=[CH:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.[CH2:6]=[CH:1][CH:2]=[CH2:3]

Participants

6

Reactant 4

HCID 7501StyreneHCID 78451,3-ButadieneHCID 8078Cyclohexane2×HCID 178418339Butyllithium

Product 1

HCID 62697Benzene, ethenyl-, polymer with 1,3-butadiene

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

In a polymerization vessel under nitrogen atmosphere were charged a cyclohexane solution containing 10 parts by weight of butadiene and 0.09 part by weight of n-butyllithium was added thereto. After polymerizing the mixture at 70° C. for 1 hour, a cylcohexane solution containing 90 parts by weight of styrene was added to the reaction mixture and polymerization reaction was continued at 70° C. for 2 hours. Thereafter, the polymerization reaction was stopped by adding methanol. The resulting polymer was separated from the polymer solution thus obtained by solidifying with methanol and then dried to obtain a styrene/butadiene block copolymer (weight average molecular weight: 100,000).

Workup

  1. additionwas added
  2. customAfter polymerizing the mixture at 70° C. for 1 hour
  3. additionwas added to the reaction mixture and polymerization reaction
  4. customThereafter, the polymerization reaction
  5. customThe resulting polymer was separated from the polymer solution
  6. customthus obtained
  7. customdried

Sources & evidence

ORD record
ord-2e2524bfc0d54bb7bae3c6da35d9520a
Source dataset
uspto-grants-1992_05
Patent number
US05110886

Reaction notes

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