METHOD FOR PREPARING VINYL CHLORIDE COPOLYMER AND VINYL CHLORIDE COPOLYMER PRODUCED BY THE SAME

摘要

The present invention relates to a method for preparing a vinyl chloride copolymer having good heat resistance and a vinyl chloride copolymer produced by the same. In the preparation method, by not injecting an N-substituted maleimide based compound used as a comonomer together with a vinyl chloride monomer at one time in a pre-polymerization step, but in division in a specific ratio, a copolymer with a uniform distribution of the N-substituted maleimide based compound and the vinyl chloride monomer may be easily prepared, and the vinyl chloride copolymer may have good heat resistance. Accordingly, the preparation method of a vinyl chloride copolymer and the vinyl chloride copolymer according to the present invention may be easily applied to industries requiring the copolymer, particularly industries requiring a resin having good heat resistance as well as industries using a vinyl chloride resin.

主权项

1. A method for preparing a vinyl chloride copolymer comprising:
pre-polymerizing for forming seed particles by polymerizing a vinyl chloride monomer and a first copolymerizable monomer; and post-polymerizing for adding a second copolymerizable monomer to the seed particles and polymerizing, wherein a total amount of the first copolymerizable monomer and the second copolymerizable monomer is from 5 to 30 parts by weight on the basis of 100 parts by weight of the vinyl chloride monomer.