Method for manufacturing vinyl chloride-vinyl acetate copolymer latex
AssigneeHanwha Solutions Corporation
InventorsEun Soo Jeong, Geun Chang Ryu, Chulwoong Lee
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Abstract
Provided is a method of preparing a vinyl chloride-vinyl acetate copolymer latex. Specifically, in one embodiment of the present invention, provided is a method of preparing a latex including vinyl chloride-vinyl acetate copolymer particles with a high degree of polymerization and molecular weight and a uniform particle composition by performing an emulsion polymerization of a vinyl chloride monomer and a vinyl acetate monomer in the presence of an aqueous dispersion medium and an emulsifier while optimizing a feeding mode of the vinyl chloride monomer and the emulsifier.
Claims11
A method of preparing a vinyl chloride-vinyl acetate copolymer latex, the method comprising the steps of:
- preparing a polymerization reaction by feeding an aqueous dispersion medium, an emulsifier, and a vinyl acetate monomer and a vinyl chloride monomer to a reactor;
- initiating the polymerization reaction by feeding an initiator to the prepared reactor;
- and
- continuously further feeding the vinyl chloride monomer and the emulsifier to the reactor, in which the polymerization reaction is initiated, respectively, and
- wherein 20% by weight to 30% by weight of the total amount (100% by weight) of the vinyl chloride monomer to be reacted is fed in a batch mode in the preparation step before initiation of the polymerization reaction, and the remainder is continuously fed while increasing the feeding amount per hour after initiation of the polymerization reaction.
Dependencies are inferred from the claim text.