Lg Chem, Ltd

Jung Su Han

Seung Uk Yeu

Jung Eun Kim

Seung Hun Yang

Won Sang Kwon

Byoung Yun Kim

Ji Hyun Kim

Yong Seok Jung

Do Young Ha

Ho Yeul Choi

Sang Jin Shin

Chang Sun Han

Myung Su Jang

Seung Whan Oh

Ji Young Lee

Yu Jin Cha

Hyun Woo Kim

Sung Hwan Kim

Jun Seok Ko

Won Tae Joe

Suk Yung Oh

Tae Shik Yoon

Yong Heon Cho

Nam Young Yoon

Provided is an acryl-based copolymer, and more particularly, an acryl-based copolymer including a main monomer-derived repeating unit and a polyfunctional monomer-derived moiety, wherein the main monomer-derived repeating unit includes a (meth)acrylic acid alkyl ester monomer-derived repeating unit, a (meth)acrylic acid alkoxy alkyl ester monomer-derived repeating unit, and a crosslinkable monomer-derived repeating unit, the polyfunctional monomer includes a vinyl group or an allyl group, and the polyfunctional monomer-derived moiety is included in an amount of 0.0005 to 1 part by weight based on 100 parts by weight of the total main monomer-derived repeating unit.

Acrylic copolymer, method for manufacturing same, and acrylic copolymer composition comprising same

Provided is a wastewater purification method, the method including: supplying a first mixed stream, in which an acid component and wastewater including water, a nitrile-based monomer, and ammonia are mixed, to a first column; recovering the nitrile-based monomer from an upper discharge stream from the first column; supplying a second mixed stream, in which a lower discharge stream from the first column and a base component are mixed, to a second column; and recovering the ammonia from an upper discharge stream from the second column and separating purified wastewater.

Wastewater purification method

A carboxylic acid-modified nitrile-based copolymer latex includes a carboxylic acid-modified nitrile-based copolymer including: 65.5 wt % to 82.5 wt % of a conjugated diene-based monomer-derived unit, 15 wt % to 30 wt % of an ethylenic unsaturated nitrile-based monomer-derived unit, and 2.5 wt % to 4.5 wt % of an ethylenic unsaturated acid monomer-derived unit, wherein the carboxylic acid-modified nitrile-based copolymer latex satisfies General Formula 1:1.0 mm/s≤≤3.0 mm/s  [General Formula 1]

Carboxylic acid modified-nitrile based copolymer latex

The present technology provides a carboxylic acid-modified nitrile-based copolymer latex including a carboxylic acid-modified nitrile-based copolymer including a conjugated diene-based monomer-derived unit, an ethylenic unsaturated nitrile-based monomer-derived unit, and an ethylenic unsaturated acid monomer-derived unit, wherein the carboxylic acid-modified nitrile-based copolymer latex satisfies General Formulas 1 and General Formula 2.

The present technology relates to a latex composition for dip molding comprising a carboxylic acid-modified nitrile-based copolymer latex satisfying General Formulas 1 and 2, wherein the carboxylic acid-modified nitrile-based copolymer includes a conjugated diene-based monomer-derived unit, an ethylenic unsaturated nitrile-based monomer-derived unit, and an ethylenic unsaturated acid monomer-derived unit, and a molded article.

Carboxylic acid modified-nitrile based copolymer latex and latex composition for dip-forming comprising the copolymer latex and article formed by the composition

The present invention relates to a latex composition for dip molding, and such latex composition includes: a carboxylic acid-modified nitrile-based copolymer latex; and a reactive compound having three or more branched chains and a reactive group at a terminal of each of the branched chains, wherein the reactive group is one or more selected from the group consisting of an amine group, a hydroxy group, an epoxy group, a glycidyl group, and an isocyanate group.

Latex composition for dip molding, dip-molded product comprising same, and method for manufacturing dip-molded product by using same

An acryl-based copolymer composition is provided. The acryl-based copolymer composition includes an acryl-based copolymer, an aggregation inducing agent, and an aggregating agent, wherein the acryl-based copolymer includes a (meth)acrylic acid alkyl ester monomer-derived repeating unit, a (meth)acrylic acid alkoxy alkyl ester monomer-derived repeating unit, and a crosslinkable monomer-derived repeating unit. The aggregation inducing agent includes a siloxane-based monomer-derived repeating unit and an ether-based monomer-derived repeating unit, and the aggregating agent includes a monovalent ionic metal salt.

Acryl-based copolymer composition, method of preparing the same, and acryl-based copolymer blend comprising the same

Disclosed is a latex composition for dip molding including a carboxylic acid-modified nitrile-based copolymer latex satisfying General Formula 1, wherein the carboxylic acid-modified nitrile-based copolymer includes: 15 wt % to 30 wt % of the ethylenic unsaturated nitrile-based monomer-derived unit and 2.5 wt % to 4.5 wt % of the ethylenic unsaturated acid monomer-derived unit, and a molded article:1.0 mm/s≤CV≤3.0 mm/s.  General Formula 1

A latex composition for dip molding having an excellent flow mark property and syneresis property and being capable of providing a molded article having excellent tensile properties and texture is provided. A method of preparing the latex composition, and a dip-molded article produced using the latex composition are also provided.

Latex composition for dip molding, method of preparing the same, and dip-molded article produced using the same

Provided is a latex composition for dip molding. The latex composition for dip molding includes a carboxylic acid-modified nitrile-based copolymer latex and a hydrophobically modified alkali-soluble emulsion thickener, wherein the hydrophobically modified alkali-soluble emulsion thickener includes a copolymer including an associative portion and a non-associative portion, and the associative portion includes a monomer-derived repeating unit substituted by one or more first hydrophobic groups selected from the group consisting of alkyl, alkenyl, perfluoroalkyl, and carbosilyl having 8 to 15 carbon atoms, and aryl, arylalkyl, arylalkenyl, alicyclic alkyl, and polycyclic alkyl having 6 to 15 carbon atoms. A method of preparing the latex composition for dip molding, and a molded article manufactured therefrom are also provided.

Latex composition for dip molding, a method of preparing the same, and molded article therefrom

An acrylic copolymer is provided. The acrylic copolymer includes: a main monomer-derived repeating unit; and a chain transfer agent-derived part, wherein the main monomer-derived repeating unit includes a (meth)acrylic acid alkyl ester monomer-derived repeating unit, a (meth)acrylic acid alkoxy alkyl ester monomer-derived repeating unit, and a crosslinking monomer-derived repeating unit, the chain transfer agent-derived part is derived from a chain transfer agent having a carbonothioylthio group, and the chain transfer agent-derived part is included in an amount of 0.03 parts by weight to 0.08 parts by weight with respect to 100 parts by weight of the main monomer-derived repeating unit. A method of preparing the same, and an acrylic copolymer composition including the same is also provided.

Acrylic copolymer, method of preparing the same, and acrylic copolymer composition including the same

Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, a dip-molded article having slow syneresis, less stickiness and superior tensile strength is produce by dip-molding of a carbonic acid-modified nitrile-based copolymer latex having increased molecular stability due to the combined use of alkenylsuccinate, which is an emulsifier crosslinkable with the latex and having a flexible molecular structure.

Latex composition for dip-forming and dip-formed article produced therefrom

The present invention relates to a latex composition for dip-molding and a molded article produced therefrom. More specifically, the composition not only has gentle syneresis, and excellent tensile strength, elongation and modulus, and excellent durability against perspiration, but also is capable of preparing the dip-molded articles having excellent wearing sensation.

Latex composition for dip molding, and molded product manufactured therefrom

Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, by using a water-soluble polymer such as poly(N-isopropylacrylamide) or a copolymer thereof in combination with a carbonic acid-modified nitrile-based copolymer latex, the stability of the latex is improved through crosslinking by hydrogen bonding, it is possible to manufacture a molded article which has a slow syneresis and is excellent in workability and does not tear even at a thin thickness due to high tensile strength.

Latex composition for dip molding and molded article manufactured therefrom

The present invention relates to a latex composition for dip-forming including two different types of carboxylic acid modified-nitrile based copolymer latex, and a dip-formed article prepared therefrom having excellent durability for sweat, and having high tensile strength and elongation percentage. Accordingly, the latex composition for dip-forming has excellent tensile strength, elongation percentage, stress and durability, and is useful in industries requiring these, for example, a rubber glove industry and the like.

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Daejeon, South Korea

Jung Su Han