Recent Developments in Transition Metal-Catalyzed Polymerization I. One-Step Synthesis of Polycarbonate from Carbon Monoxide and Bisphenol A Based on Oxidative Carbonylation.

• ISHII Hirotoshi

  Polymer Research Laboratory, Idemitsu Petrochemical Co., Ltd.

Bibliographic Information

Other Title

• 遷移金属触媒重合の新展開　Ｉ　　酸化的カルボニル化反応に基づく一酸化炭素とビスフェノールＡからのポリカーボネートへの一段重合
• サンカテキ カルボニルカ ハンノウ ニ モトヅク 1サンカタンソ ト ビスフェノール A カラ ノ ポリカーボネート エ ノ イチダン ジュウゴウ

Abstract

Polycarbonate (PC) is one of the most important engineering plastics, which is produced by polycondensation reaction of bisphenol A (bis-A) with phosgene. To achieve a more economical and safe process, a direct one-step synthesis of PC from bis-A and carbon monoxide was developed on the basis of Pd catalyzed oxidative carbonylation. New catalyst systems for the one-step synthesis of diphenyl carbonate (DPC) from carbon monoxide and phenol were investigated in the model reaction to develop efficient catalyst systems. The Pd-Sn complex including [Pd-Pd-Sn] or [Sn-Pd-Pd-Sn] structure with a Mn redox catalyst was found to produce DPC effectively without addition of any ammonium halide. In the presence of an ammonium halide, Pd catalyst systems, such as the Pd dinuclear complex possessing a 2-pyridylphosphine ligand, Pd-diimine complex derived from 2, 6-di-iso-propylaniline with a 1, 2-diketone or 1, 2-dialdehyde, and Pd-bipyridyl complex consisting of a 6, 6′-disubstituted-2, 2′-bipyridyl ligand, promoted the oxidative carbonylation of phenol more effectively. The immobilization of Pd complex catalyst systems was also investigated. These novel Pd complex catalyst systems were applied to the one-step synthesis of PC from bis-A and carbon monoxide. PC with the number- and weight-average molecular weights of 5600 and 12900 respectively, was successfully obtained using Pd-6, 6′-disubstituted-2, 2′-bipyridyl complexes. These molecular weights were much higher than the one-step synthesis of PC by oxidative carbonylation using conventional Pd catalyst systems such as PdBr₂.

Journal

• KOBUNSHI RONBUNSHU

  KOBUNSHI RONBUNSHU 59 (4), 137-149, 2002

  The Society of Polymer Science, Japan

Keywords

• One-Step Synthesis
• Polycondensation
• Oxidative Carbonylation
• Polycarbonate
• Carbon Monoxide
• Oxygen
• Bisphenol A
• Pd-Sn Complex
• Pd Dinuclear Complex
• Pd-bipyridyl Complex
• Pd-diimine Complex
• Immobilized Pd Catalyst
• Redox Catalyst
• Ammonium Halide

Details

• CRID: 1390001206523182464
• NII Article ID: 10008223715
• NII Book ID: AN00085011
• DOI: 10.1295/koron.59.137
• ISSN: 18815685
• ISSN: 03862186
• NDL BIB ID: 6154144
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6154144
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed