Title:
【発明の名称】ポリ(エーテルケトンケトン類)よりの金属残留物の抽出方法
Document Type and Number:
Japanese Patent JPH0662760
Kind Code:
B2
Abstract:
Metal residues are extracted from poly(ether ketone ketones) with aliphatic alpha-hydroxycarboxylic acids or aromatic ortho-hydroxycarboxylic acids in a liquid phase, either neat or in an aqueous or a nonaqueous solution. Extraction of metal residues, which usually derive from the catalysts used in the preparation of poly(ether ketone ketones), improves both the color and the thermal stability of these polymers.
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Inventors:
BURUUGERU EDOWAADO JII
Application Number:
JP50350690A
Publication Date:
August 17, 1994
Filing Date:
January 04, 1990
Export Citation:
Assignee:
II AI DEYUHON DE NIMOASU ANDO CO
International Classes:
C08G67/00; C08G8/02; C08G14/00; C08G61/12; (IPC1-7): C08G67/00
Other References:
【文献】米国特許4611033(US,A)
Attorney, Agent or Firm:
Heiyoshi Odashima (1 person outside)
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