| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a vinyl-based polymer, capable of improving productivity without impairing physical properties and reducing the remaining amount of a vinyl-based monomer as a raw material. SOLUTION: This method for producing a vinyl-based polymer comprises using t-amylperoxy 2-ethylhexylcarboxylate, radical-polymerizing one or more vinyl-based monomers. The amount of t-amylperoxy 2-ethylhexylcarboxylate used is 0.005-5 pts.wt. of based on 100 pts.wt. of the vinyl-based monomers. The method includes a polymerization process of two or more steps and radical- polymerizes one or more vinyl-based monomers by using one or more selected from the group consisting of peroxyacid alkyl esters, peroxyketals and diacyl peroxides as an initiator at the steps except the final Step and t-amylperoxy 2-ethylhexylcarboxylate as an initiator at the final step.
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