Styrene → 1,3-Butadiene

HRID 2417634Notes

Reaction equation

HRID 2417634 reaction equation
[C:1](#[N:4])[CH:2]=[CH2:3].[CH2:5]=[CH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1>>[CH2:5]=[CH:6][CH:7]=[CH2:8].[CH2:3]=[CH:2][C:1]#[N:4].[CH2:5]=[CH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1

Participants

4

Reactant 2

HCID 7501StyreneHCID 7855Acrylonitrile

Product 2

HCID 78451,3-ButadieneHCID 62696Prop-2-enenitrile--ethenylbenzene (1/1)

Procedure

ABS co-polymers are prepared by a two stage emulsion polymerisation process. In the first stage butadiene is polymerised in an aqueous solution of an anionic detergent to give particles of polybutadiene surrounded by a layer of soap molecules. Acrylonitrile and styrene are then added, together with an initiator, which results in a soap-stabilised emulsion of butadiene particles cross-linked with acrylonitrile-styrene co-polymer. The emulsion may be coagulated by acidification or by the addition of water miscible organic solvents. Samples of such an emulsion containing 32.32% solids were used in the following examples.

Sources & evidence

ORD record
ord-450088ed2a444cfa86c202367a2b18bd
Source dataset
uspto-grants-1984_09
Patent number
US04469849

Reaction notes

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