Method for producing vinyl chloride-based polymer
AssigneeLG Chem, Ltd.
InventorsKwang Jin Lee, Yang Jun Jeon, Jae Hyun Park, Hyun Kyou Ha
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Abstract
A method for producing a vinyl chloride-based polymer, wherein the vinyl chloride-based polymer is produced by sequentially adding a first emulsifier and a second emulsifier, which are different from each other, during polymerization and using a succinate compound as a first emulsifier. The method provides improved processability by achieving low-viscosity properties when plastisol is mixed using the produced polymer, and improved fogging properties by suppressing generation of volatile organic compounds.
Claims9
A method for producing a vinyl chloride-based polymer, the method comprising the steps of:
- 1) Adding a vinyl chloride-based monomer into a reactor to initiate polymerization;
- 2) Continuously adding a first emulsifier to the reactor from a polymerization initiation time to a time when a polymerization conversion rate reaches a range of 35% to 52%;
- and
- 3) Continuously adding a second emulsifier after completing the adding of the first emulsifier,
- wherein the first emulsifier and the second emulsifier are different from each other, the first emulsifier is a succinate compound, and the second emulsifier comprises a sulfate compound,
- the first emulsifier and the second emulsifier are added at a weight ratio of 6:4 to 9:1, and
- wherein the second emulsifier comprises at least one selected from the group consisting of alkyl ether sulfate, sulfate alkanolamide, monoglyceride sulfate, glycerol ether sulfate, fatty acid ether sulfate, and fatty acid amide ether sulfate.
Dependencies are inferred from the claim text.