Vinyl Chloride → Vinyl chloride-vinyl acetate

HRID 1522939Notes

Reaction equation

[CH:1]([Cl:3])=[CH2:2].[C:4]([O:7][CH:8]=[CH2:9])(=[O:6])[CH3:5].S(OOS([O-])(=O)=O)([O-])(=O)=O.[K+].[K+].C1(S(OCCCCCCCCCCCC)(=O)=O)C=CC=CC=1.[Na]>O>[C:4]([O:7][CH:8]=[CH2:9])(=[O:6])[CH3:5].[CH:1]([Cl:3])=[CH2:2]

Participants

Conditions

Temperature: 60 °C

Procedure

Deionized water 600 g, a monomer mixture consisting of vinyl chloride monomer 438.8 g (97.5% by weight on the basis of the total amount of whole charged monomer) and vinyl acetate 11.2 g (2.5% by weight on the basis of the total amount of whole charged monomer), and potassium persulfate 2.25 g were charged into a 2.5 L autoclave. This reactive mixture was stirred by a stirring blade so as to maintain a rotation speed of 120 rpm, and the polymerization was initiated by raising temperature of the reaction mixture up to 60° C. A 5% by weight aqueous solution of sodium dodecyl benzene sulfonate 180 g (2% by weight on the basis of the total amount of whole charged monomer) were continuously added from the polymerization initiation to 4 hr after the initiation. When the polymerization system had a polymerization pressure drop of 0.6 MPa from the saturated vapor pressure of vinyl chloride monomer at 60° C., the polymerization was terminated, and the remaining monomer was recovered to obtain the vinyl chloride-vinyl acetate type emulsion.

Workup

additionwere charged into a 2.5 L autoclave
temperatureto maintain a rotation speed of 120 rpm
customthe polymerization was terminated
customthe remaining monomer was recovered

Sources & evidence

ORD record: ord-190232e33ab34c73aa533b4e1e8e4970
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09079445B2

Reaction notes

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