Styrene → HCID 86741594, compound
Reaction equation
[CH2:1]1[CH2:6]CC[CH2:3][CH2:2]1.[CH2:7]=[CH:8][CH:9]=[CH2:10].C([Li])CCC.[CH2:16]=[CH:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>O1CCCC1>[CH2:6]=[CH:1][CH:2]=[CH2:3].[CH2:16]=[CH:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.[CH2:7]=[CH:8][CH:9]=[CH2:10].[CH2:16]=[CH:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Procedure
In an autoclave were placed 4,000 g of cyclohexane, 100 g of 1,3-butadiene monomer, 0.53 g of n-butyllithium and tetrahydrofuran in a proportion of 40 moles per mole of n-butyllithium. They were subjected to polymerization for 30 minutes at 70° C., and then 150 g of styrene was added and subsequently polymerized for 60 minutes, after with 600 g of 1,3-butadiene was added and polymerized for 150 minutes. Thereafter, 150 g of styrene was added and subsequently polymerized for 60 minutes, to obtain a butadiene-styrene-butadiene-styrene block copolymer. The resulting living polymer solution was poured into a large amount of methanol for deactivation and precipitation. The precipitated polymer was vacuum-dried for 50 hours at 60° C. The polymer was a block copolymer having a bound styrene content of 30%, a block styrene content of 28% and a 1,2-vinyl content in the butadiene units of 35% (25% based on the weight of the entire copolymer) and having a number average molecular weight of about 120,000.
Workup
- customThey were subjected to polymerization for 30 minutes at 70° C.
- customsubsequently polymerized for 60 minutes
- custompolymerized for 150 minutes
- customsubsequently polymerized for 60 minutes
Sources & evidence
- ORD record
- ord-f82b11ec059942e4b04badbe64c980a0
- Source dataset
- uspto-grants-1987_06
- Patent number
- US04673714
Reaction notes
Loading…