Method for producing vinyl chloride-based copolymer
AssigneeLG Chem, Ltd.
InventorsJae Hyun PARK, Seong Yong AHN, Hyun Min LEE, Joong Chul LIM, Hyun Jong PAIK, Hong Yul CHO, Dong Woo KIM, Seok Hyeon JEONG
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Abstract
A method for producing a vinyl chloride-based copolymer by copolymerizing a polymerizable monomer with a vinyl chloride-based polymer, wherein the method is capable of producing a vinyl chloride-based copolymer with high heat resistance by optimizing the ratio between the repeating units in the chain of polyvinyl chloride and a reducing agent, monomer, catalyst, and ligand.
Claims15
A method for producing a vinyl chloride-based copolymer, the method including the steps of:
- adding a reducing agent, a polymerizable monomer, a catalyst, and a ligand to a solution containing polyvinyl chloride (S1);
- and
- performing a polymerization reaction by raising the temperature of the solution (S2),
- wherein a molar ratio of repeating units in the polyvinyl chloride in the solution to the added catalyst is 1000:0.3 to 1000:0.6.
A vinyl chloride-based copolymer, comprising a vinyl chloride monomer-derived unit and a polymerizable monomer-derived unit,
- wherein the polymerizable monomer is at least one monomer selected from the group consisting of C1-12 alkyl (meth)acrylate, styrene, C3-12 cycloalkyl (meth)acrylate, C1-12 sulfoalkyl (meth)acrylate, acrylonitrile, polyoxyethylene (meth)acrylate, polyethylene glycol) methyl ether (meth)acrylate, (2-acetoacetoxy)ethyl (meth)acrylate, (meth)acrylamide, N-vinylpyrrolidone, and derivatives thereof, and
- wherein the copolymer has a glass transition temperature (Tg) of 90 to 120° C.
Dependencies are inferred from the claim text.