Sk Innovation Co., Ltd.

Sk Geo Centric Co., Ltd.

Sk Global Chemical Co., Ltd.

Sk Gc Americas Inc.

Doh Yeon Park

Hai Jin Shin

Sang Ha Son

Jae Eun Lee

Wan Ju Jeong

Yong Zheng

Byoung Kyu Kwak

Ju Eun Jung

Ho Seong Lee

Hae Woong Park

Hong Chan Kim

Suk Joon Kim

Byoung Cheon Jo

Sun Joo Kim

Ji Sun Choi

Soo Young Hwang

Du Youn Ka

Christopher Balhoff

Mark Jasek

Kyung Jin Ma

Juan Carlos Estevez Videira

In Su Lee

Manuel David Recasens Alvaro

An aqueous dispersion composition according embodiments of the present invention includes an ethylene-carboxylic acid copolymer, an anti-blocking agent including a polymer wax included in a content of 5 wt % or more based on a weight of the ethylene-carboxylic acid copolymer, and an aqueous dispersion medium. A peak area corresponding to a melting point of 80° C. or less in a differential scanning calorimetry (DSC) graph is 50% or more. Blocking phenomenon is suppressed using the anti-blocking agent while achieving desired heat seal properties.

Aqueous dispersion composition comprising ethylene-carboxylic acid

A method for producing an ethylene-acrylic acid copolymer may minimize the neck-in phenomenon of the strand by discharging the copolymer strand by controlling the discharging temperature of the produced copolymer to be 200 to 300° C., has excellent workability, processability, and moldability, and melt index (MI) is easy to control. In addition, the ethylene-acrylic acid copolymer produced by this method has the effect of having high melt tension.

Method for producing ethylene-acrylic acid copolymer

The present invention relates to a method for producing an ethylene-based copolymer, and more particularly, to a method for producing an ethylene-based copolymer capable of increasing process efficiency by preventing plugging and corrosion of a facility. The method for producing an ethylene-based copolymer includes a producing mode and a washing mode of which one is selectively performed. The producing mode includes: a) hyper-compressing primary compressed ethylene, and a mixture including a carboxylic acid-containing comonomer and a polar solvent to produce a compressed material; b) reacting the compressed material to produce a reaction product including an ethylene-based copolymer; and c) separating and recovering unreacted residues from the reaction product and introducing the unreacted residues into the mixture of step a). The washing mode includes: re-supplying the compressed material produced in step a) to step a) as a mixture, without performing step b).

Washing methods for ethylene-acrylic acid copolymer manufacturing process using solvent

An ethylene-(meth)acrylic acid copolymer has a portion having a melting temperature of 94&#xb0; C. or higher. A content of the portion having the melting temperature of 94&#xb0; C. or higher measured by a Successive Self-nucleation and Annealing (SSA) analysis is 1.5% or less. A water-dispersive composition includes the ethylene (meth)acrylic acid copolymer, a neutralizing agent and an aqueous medium.

Ethylene-(meth)acrylic acid copolymer and water-dispersive composition including the same

A method of preparing an aqueous dispersion of an ethylene-carboxylic acid copolymer according to exemplary embodiments of the present invention includes: mixing 30% by weight or more of an ethylene-(meth)acrylic acid copolymer, a basic compound, and water to form a mixed solution; and adding an inorganic salt compound to the mixed solution. Therefore, the aqueous dispersion of the ethylene-carboxylic acid copolymer may be effectively dispersed.

Aqueous dispersion of ethylene-carboxylic acid copolymer and method of preparing the same

An ethylene-(meth)acrylic acid copolymer has a polydispersity index (PDI) in a range from 3.5 to 8.0, and has a melt flow index (MFI) measured at 190&#xb0; C. and 2.16 kg in a range from 350 g/10 min to 1800 g/10 min A water-dispersive composition includes the ethylene (meth)acrylic acid copolymer, a neutralizing agent and an aqueous medium.

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Daejeon, South Korea

Doh Yeon Park