Lotte Chemical Corporation

Ji Hae Park

Bun Yeoul Lee

Jung Jae Lee

Jong Yeob Jeon

Eun Yeong Hwang

Yong Taek Hwang

Kwang Hyun Paek

Young Eun Jang

The prevent invention relates to a biodegradable polymer resin composition which can realize excellent mechanical properties together with biodegradability and has improved molding processability, and a molded article thereof. The biodegradable polymer resin composition may include a polycarbonate-polyester copolymer including a branched repeating unit containing a mediating functional group including a central element and five to ten alkylene or heteroalkylene functional groups bonded to the mediating functional group, an aliphatic polycarbonate repeating unit having a chain structure, and an aromatic polyester repeating unit, and a biodegradable polyester resin having a melt index (measured at 190&#xb0; C., 2.16 kg) of 3 g/10 min to 20 g/10 min.

Biodegradable polymer resin composition and molded article thereof

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

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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Hwaseong, South Korea

Ji Hae Park