Lg Chem, Ltd

Chang-Sun Han

Tae-Young Won

Gi-Cheul Kim

Sang-Gi Lee

Kyu-Pal Kim

Gyu Leem

Ho-yeul Choi

Sung-Soo Park

Seung-Uk Yeu

Yong-Hun Lee

Wan-Sik Cha

Seung-hun Yang

Dong-Jo Ryu

Jin-Hyun Bae

Dae-Ho Lee

Ji-Sang Jeong

Byoung-Yun Kim

Young-Min Lee

Sang-Gil Lee

Jeong-heon Ahn

Kwang-jin Lee

Hyung-jun Son

Seon-Hee Han

Seung-Hun Yang

Jung-su Han

Hak-lae Lee

Ji-sang Jeong

Hye-Min Lee

Ho-Yeul Choi

Ju-Hyun Kim

Hae-Young Kim

The present invention relates to a super absorbent polymer (SAP) and a preparation method thereof. More specifically, the present invention provides a SAP satisfying the overall properties required to a SAP and especially the superior initial absorbency and absorbing rate under load at the same time, and a preparation method thereof, by treating the surface of the SAP with a surface treatment solution including water and a diol-based or glycol-based surface crosslinking agent.

Super absorbent polymer and a preparation method thereof

The present invention relates to a method of preparing a super absorbent polymer (SAP), and more specifically to a method of preparing a SAP including the steps of spraying the monomer composition on a substrate having a hydrophobic surface of a certain tan angle and carrying out a UV polymerization on a polymerization reactor having a slightly hydrophilic surface. The present invention can improve the conversion rate of polymerization because the shape of the monomer solution is changed from prior sheet form to droplet form so that UV rays reach the deeper layer of the droplets, can minimize or simplify the recycling process because it is easy to control the particles of the prepared polymer, and can provides the SAP of high caliber by narrowing the particle diameter distribution and improving the uniformity.

Preparation method of a super absorbent polymer

Disclosed is coated paper having a coating structure in which styrene-butadiene latex distribution of a paper coating layer is controlled in order to reduce fold cracking of the coated paper and a method for manufacturing the same. The coated paper in which different types of latexes are separately applied to two coating layers exhibits considerably improved stiffness and reduced fold crack, as compared to the existing coated paper.

Coated paper having a coating structure with controlled distribution of latex and method for preparing the same

The present invention is to provide a shredder for super absorbent polymer that includes: an inlet portion for feeding a plate-shaped super absorbent polymer; a pulverizing portion for pulverizing the super absorbent polymer fed through the inlet portion; and an outlet portion for discharging the pulverized super absorbent polymer from the pulverizing portion. The pulverizing portion includes: a rotary drum to which a plurality of rotary blades are attached; at least fixed blade for pulverizing the super absorbent polymer in cooperation with the plural rotary blades; and a housing for holding the rotary drum and the at least one fixed blade. Each rotary blade has a shape of polygon with at least one vertex having an acute angle of at most 45 degree. The present invention is also to provide a preparation method for super absorbent polymer using the shredder for super absorbent polymer.

Shredder for super absorbent polymer and preparation method of super absorbent polymer using the same

The present invention relates to a super absorbent polymer. According to the present invention, provided is a super absorbent polymer which includes (meth)acrylated polyalkylene glycol on an internally crosslinked polymer inside a surface modified layer, thereby exhibiting more improved absorbency and retention capacity.

Super absorbent polymer

The present invention relates to a method of manufacture of styrene-butadiene latexes. The styrene-butadiene latex according to the present invention is characterized by having a superior adhesive force as the formation of films at an early stage is promoted by adjusting the gel content and molecular weight of the outermost layer, as well as a fast ink-drying speed and a high air permeability as the formation of paper films is maintained. It may be applied to paper coating very stably since the mechanical stability and chemical stability of the latex are superior.

Method of manufacture of styrene-butadiene latexes

The present invention relates to a paper coating latex comprising 0.001-10 weight part of cyclo-oligosaccharide compound to 100 weight part of styrene-butadiene latex and a paper coating composition containing the same, and according to the present invention, latex petrochemical odors generated during the coating processes by non-reacted monomers and volatile organic compounds remaining in the latex can be eliminated without reducing polymerization productivity and latex stability.

Odorless paper coating latex and paper coating composition containing the same

The present invention relates to a preparation method of a superabsorbent polymer, and specifically to a method of preparing a superabsorbent polymer including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; classifying the milled hydrous gel phase polymer into two or more grades by particle size; adding a surface cross-linking agent to each hydrous gel phase polymer classified into two or more grades; and carrying out a surface cross-linking reaction of the hydrous gel phase polymer to which the surface cross-linking agent is added.

Preparation method of superabsorbent polymer

A shredder for super absorbent polymer includes an inlet portion for feeding a plate-shaped super absorbent polymer, a pulverizing portion for pulverizing the super absorbent polymer fed through the inlet portion, and an outlet portion for discharging the pulverized super absorbent polymer from the pulverizing portion. The pulverizing portion includes a rotary drum to which a plurality of rotary blades are attached, at least one fixed blade for pulverizing the super absorbent polymer in cooperation with the plural rotary blades, and a housing for holding the rotary drum and the at least one fixed blade. Each rotary blade has a polygon shape with at least one vertex having an acute angle of at most 45&#xb0;.

Shredder for super adsorbent polymer and preparation method of super absorbent polymer using the same

The present invention provides a polymerization reactor for producing a super absorbent polymer comprising: a reaction unit; a monomer composition supply unit being connected to the reaction unit and supplying a monomer composition solution containing a monomer, a photoinitiator, and a solvent; an agitating shaft extended in the reaction unit from one end of the reaction unit connected to the monomer composition supply unit to the other end of the reaction unit; a plurality of agitating blades installed around the agitating shaft; and a light irradiation unit providing light to the monomer composition solution furnished from the monomer composition supply unit, and a method of producing super absorbent polymers by using the same.

Polymerization reactor for producing super absorbent polymers and method of producing super absorbent polymers using the polymerization reactor

The present invention relates to a method of preparing a superabsorbent polymer, including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; adding a surface cross-linking agent to the milled polymer; and elevating the temperature of the polymer including the surface cross-linking agent at a speed of 3&#xb0; C./min to 15&#xb0; C./min, and carrying out a surface cross-linking reaction at 100&#xb0; C. to 250&#xb0; C.

Disclosed are paper coating latex, a method for preparing the same, and paper coating composition containing the same, characterized in that in the paper coating latex having a core-shell structure, the core is formed by the polymerization of monomer mixtures comprising 5 to 10 weight parts of ethylene unsaturated acid based on 100 weight parts of the core, wherein the amount of ethylene unsaturated acid in the shell is less than that in the core, and the shell has glass transition temperature up to room temperature, lower than that of the core. The present invention has an effect of providing a high quality matte coated paper that has excellent printability such as ink drying rate, adhesion, etc., as well as low white paper gloss and improved print gloss by coating paper coating composition containing multi-layered paper coating latex having high swelling and contraction property on paper.

Multi-layered paper coating latex having high swelling and contraction property, method for preparing the same, and paper coating composition containing the same

The present invention relates to a styrene-butadiene latex, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper containing ethylenically unsaturated monomer by 0.1-1.5 weight parts with lowering surface negative charge density, a preparation method thereof and a coating liquid containing the same. The present invention provides a coating liquid for ink-jet paper having excellent price competitiveness and coating work-ability and at the same time reducing energy cost for drying process and thereby provides an ink-jet paper with excellent printing quality.

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Daejeon, South Korea

Chang-Sun Han