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US 2021/0079136 A1Published application
Method for Preparing Ethylene Vinylacetate Copolymer
AssigneeLG Chem, Ltd.
InventorsDae Young Shin, Eun Jung Joo, Jin Ho Jung, Choong Hoon Lee, Kyung Soo Park, Yutaek Sung
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Abstract
The present invention relates to a method for preparing ethylene vinylacetate copolymer that can improve the mechanical strength of copolymer by controlling the polymerization conditions using an autoclave reactor.
Claims10
A method for preparing ethylene vinylacetate copolymer comprising:
- polymerizing ethylene monomers and vinylacetate monomers in an autoclave reactor, in the presence of an initiator,
- wherein a temperature of an upper stage of the autoclave reactor during the polymerizing step is 130 to 160° C.,
- a temperature of a lower stage of the autoclave reactor during the polymerizing is 170 to 230° C., and
- a pressure of the autoclave reactor is 1800 to 2100 bar.
1 more element
Dependencies are inferred from the claim text.