Other

Dl Chemical Co., Ltd.

Lee, Jang Woo

Jang Woo Lee

Byung Keel Sohn

Su Hyun Park

Da Jung Kim

Sung Ho Choi

Hee Jun Lee

Soon Jae Kwon

Sung Woo Kang

Sah Mun Hong

Byung Soon Chun

Disclosed is an antistatic agent for a metallocene olefin polymerization process and a polymerization method using the same, by which discontinuity event due to sheeting or drooling occurring in the olefin polymerization process can be effectively reduced, enabling continuous operation for a long time, and the obtained final product can be applied to various applications including food contact use. The present disclosure includes an olefin polymerization method, which comprises forming a mixture in which an antistatic agent containing diglycerol oleate is mixed with a low molecular weight hydrocarbon, supplying the antistatic agent mixture and a metallocene-based catalyst composition comprising a metallocene catalyst and aluminoxane to two or more polymerization reactors, and polymerizing one or more alpha-olefins in the presence of the antistatic agent mixture and catalyst composition.

Olefin polymerization method using antistatic agent for metallocene olefin polymerization process

Disclosed are a polyolefin resin composition and a production method using same. The polyolefin resin satisfies the following conditions: (1) melt index (MI2.16, 190&#xb0; C., under a load of 2.16 kg) is 0.1 to 1.5 g/10 min; (2) density is 0.91 to 0.93 g/cc; (3) polydispersity Index (Mw (weight-average molecular weight)/Mn (number-average molecular weight)) is 3 to 7; (4) Mz (Z-average molecular weight)/Mw (weight-average molecular weight) is 2.3 to 4.5; and (5) COI(Comonomer Orthogonal Index) value calculated by Equation 1 in the specification is 5 to 12. In Equation 1, 'SCB number at Mz' represents average number of branches derived from comonomers per 1000 carbon atoms at Z-average molecular weight (Mz), and 'SCB number at Mn' represents average number of branches derived from comonomers per 1000 carbon atoms at number-average molecular weight (Mn) based on a molecular weight-comonomer distribution graph.

Polyolefin resin composition and production method of same

A catalyst composition for polymerizing a polyolefin having excellent processability and impact strength, a process for producing a polyolefin and a polyolefin resin thereof are disclosed. The catalyst composition comprises at least one first organometallic compound of following formula 1; at least one second organometallic compound of following formula 2; and aluminoxane. The polyolefin resin satisfies following properties (i) to (iv) and (vi), (i) melt flow index (ASTM D1238), measured at 190&#xb0; C., under a load of 2.16 kg: 0.1 to 1.5 g/10 min, (ii) density: 910 to 930 kg/m, (iii) the ratio (Mw/Mn), as measured by gel permeation chromatography (GPC): 3.0 to 7.0, (iv) the ratio (Mz/Mw), as measured by GPC: 2.2 to 4.5, and (vi) when the TREF curve of multimodal distribution is deconvoluted, the area of TREF curve having a peak at 50 to 74&#xb0; C. is 40 to 75% of the total area of the TREF curve.

Catalyst composition for polymerizing polyolefin, method for producing polyolefin, and polyolefin resin

A flow-controlling unit having a function of limiting the tilting angle of a flow-controlling piece which includes a flow-controlling plate, which is disposed perpendicular to the moving direction of a fluid in a flow channel. The flow-controlling plate includes first fluid through-holes through which the fluid passes and flow-controlling pieces which are provided in a part corresponding to the first fluid through-holes. The flow-controlling pieces are inclined in the direction of the inflow of the fluid and control the degree of opening of the first fluid through-holes by being tilted due to pressure applied from hydraulic pressure of the fluid. A tilting-angle-limiting plate has second fluid through-holes which communicate with the first fluid through-holes, wherein the diameter of the second fluid through-holes is smaller than the diameter of the first fluid through-holes, allowing the flow-controlling pieces to be supported to limit the tilting angle of the flow-controlling pieces.

Flow-controlling unit having function of limiting tilting angle of flow-controlling piece

A flow-controlling unit provided in a flow channel is disclosed. The flow-controlling unit provided in a flow channel, according to one embodiment of the present invention, comprises: a plate which is disposed perpendicular to the moving direction of a fluid in a flow channel, and on which are formed multiple fluid through-holes through, which the fluid passes; and one or more flow-controlling pieces which are provided in a position corresponding to the fluid through-holes, form an inclination with respect to the plate in the direction of the inflow of the fluid, are capable of tilting on the plate, and control the degree of opening of the fluid through-holes by being tilted due to pressure applied from hydraulic pressure of the fluid.

Flow-controlling unit provided in flow channel

There is disclosed a water spray plate having micro-shower-holes formed therein to expand a passage area of liquid. The plurality of the shower hole arrays formed to unit sprayed liquids may be arranged and there may be an effect of enabling the user to feel that sufficient liquid is supplied even if a small amount of liquid is supplied. As a result, the substantial amount of the liquid used by the user may be reduced and there may be a water-saving effect.

Water spray plate

A shower plate and a water-saving shower using the same are disclosed. The shower plate provided in a head body of a shower used to supply fluid along an inner path thereof, the shower plate includes a plurality of spray holes configured to spray the supplying fluid out, wherein a predetermined amount of the spray hole are direction changing spray holes comprising a direction changing parts projected inwardly there from. The water-saving shower includes a shower plate provided in a head body of a shower used to supply fluid along an inner path thereof, the shower plate comprising a plurality of spray holes configured to spray the supplying fluid out, wherein a predetermined amount of the spray hole are direction changing spray holes comprising a direction changing parts projected inwardly there from, and a filter provided in the head body to filter foreign substances contained in the supplying fluid before the supplying fluid reaches the shower plate.

Growing community of inventors

Gyeonggi-do, South Korea

Jang Woo Lee