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

HRID 849619Notes

Reaction equation

HRID 849619 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.C=CC=C.C1COCC1.[Li]CCCC>CCCCCCC>[CH2:1]=[CH:2][CH:3]=[CH2:4].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

6

Reactant 4

HCID 7501StyreneHCID 78451,3-ButadieneHCID 8028TetrahydrofuranHCID 178418339Butyllithium2×

Product 1

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

Reagents, catalysts & solvents 1

HCID 8900HeptaneSolvent

Procedure

In a first stage a butadiene-styrene copolymer is prepared by injecting 167 g of styrene, 476 g of butadiene and 2000 ppm of THF into a 10-liter reactor containing 6.4 liters of deaerated heptane. The impurities are neutralized with the aid of n-BuLi and then 0.0038 mol of n-BuLi are added, together with 0.0011 mol of sodium tert-butylate, employed as randomizing agent; the polymerization is conducted at 55° C.

Workup

  1. customis conducted at 55° C.

Sources & evidence

ORD record
ord-f9d9d9359e6c40dbadaffc4bb9e40949
Source dataset
uspto-grants-2000_01
Patent number
US06013718

Reaction notes

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