Lotte Chemical Corporation

Lotte Advanced Materials Co., Ltd.

Jung Jae Lee

Bun Yeoul Lee

Jong Yeob Jeon

O Sung Kwon

Jun Ho Chi

Ji Hae Park

Jong Chan Hur

Woo Suk Chei

Eun Yeong Hwang

Hyun Hye Jang

Jin Yong Bae

Seong Chan Eo

Young Eun Jang

A polyphosphonate resin composition of the present invention comprises: about 100 parts by weight of a polyphosphonate resin containing a repeating unit represented by chemical formula 1; and about 0.01 to about 0.05 parts by weight of a phosphite compound containing at least one of diphenyl hydrogen phosphite and a phosphite compound represented by chemical formula 2. The polyphosphonate resin composition has excellent heat resistance, wet heat stability, discoloration resistance, flame retardancy, and the like.

Polyphosphonate resin composition and molded article prepared therefrom

Provided is an aliphatic polycarbonate macropolyol including &#x2014;OAO&#x2014; and Z(O&#x2014;)as repeating units. In the aliphatic polycarbonate macropolyol, the repeating units &#x2014;OAO&#x2014; and Z(O&#x2014;)are linked to each other via carbonyl (&#x2014;C(O)&#x2014;) linkers or are bonded to hydrogen to form terminal &#x2014;OH groups. The number of moles of the terminal &#x2014;OH groups is from aZ to aZ+0.2Z (where Z represents the number of moles of the repeating unit Z(O&#x2014;)). Further provided is an aliphatic polycarbonate-co-aromatic polyester macropolyol including &#x2014;OAO&#x2014; and Z(O&#x2014;)as repeating units. In the aliphatic polycarbonate-co-aromatic polyester macropolyol, the repeating units &#x2014;OAO&#x2014; and Z(O&#x2014;)are linked via carbonyl (&#x2014;C(O)&#x2014;) and &#x2014;C(O)YC(O)&#x2014; as linkers or are bonded to hydrogen to form terminal &#x2014;OH groups.

Aliphatic polycarbonate macropolyol and aliphatic polycarbonate-coaromatic polyester macropolyol

A polycarbonate resin composition of the present invention comprises: a polycarbonate resin; a polyalkylene glycol; an epoxy ester compound containing an ester group and an epoxy group; and a halogenated polycarbonate oligomer. The polycarbonate resin composition has excellent discoloration resistance, color, hydrolysis resistance, flame retardancy and the like even after being irradiated with ionizing radiation.

Ionizing-radiation-resistant polycarbonate resin composition, and molded product comprising same

A polycarbonate resin of the present invention comprises: a repeat unit represented by chemical formula 1 in the specification; a repeat unit represented by chemical formula 2; and a repeat unit represented by chemical formula 3. The polycarbonate resin has excellent flame retardancy, thermal resistance, transparency, impact resistance, etc.

Polycarbonate resin and preparation method therefor

Provided is an aliphatic polycarbonate-co-aromatic polyester with long-chain branches. The copolymer includes repeating units represented by &#x2014;OAO&#x2014; and Z(O&#x2014;), which are linked via carbonyl (&#x2014;C(O)&#x2014;) and &#x2014;C(O)YC(O)&#x2014; as linkers. Also provided is an aliphatic copolycarbonate including repeating units represented by &#x2014;OAO&#x2014; and Z(O&#x2014;), which are linked via carbonyl (&#x2014;C(O)&#x2014;) linkers. The aliphatic copolycarbonate has a weight average molecular weight of 30,000 or more.

Aliphatic polycarbonate with long-chain branches and aromatic copolyester thereof

An aliphatic polycarbonate is disclosed in which a salt consisting of a metal or onium cation and an anion having a pKa not greater than 3 is dispersed. The aliphatic polycarbonate includes repeating units of Formula 1: [-A-OC(O)O-] (wherein A is a substituted or unsubstituted C-Calkylene, or a substituted or unsubstituted C-Cheteroalkylene and the O-A-O units in one polymer chain may be identical to or different from each other).

High-molecular weight aliphatic polycarbonate prepared using base catalyst

Provided is an aliphatic polycarbonate copolymer including repeating units of Formula 1 described in the specification. In Formula 1, A is a substituted or unsubstituted C-Calkylene or a substituted or unsubstituted C-Cheteroalkylene and the O-A-O units in one polymer chain may be identical to or different from each other, B is a substituted or unsubstituted C-Carylene or a substituted or unsubstituted C-Cheteroarylene and the &#x2014;C(O)&#x2014;B&#x2014;C(O)&#x2014; units in one polymer chain may be identical to or different from each other, and x and y are real numbers representing mole fractions.

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Suwon-si, South Korea

Jung Jae Lee