Method for producing a liquid crystalline polyester and the...

Details Method for producing a liquid crystalline polyester and the... Method for producing a liquid crystalline polyester and the...

2006-03-07

2006-03-07

Acquah, Samuel A. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S181000, C528S182000, C528S185000, C528S194000, C524S714000, C524S783000

Reexamination Certificate

active

07009026

ABSTRACT:
The object is to provide liquid crystalline polyester which gives molded articles without generating acetic acid gas, and a method for producing the liquid crystalline polyester. This object is achieved by a method for producing a liquid crystalline polyester comprising melt-polymerizing aromatic hydroxycarboxylic acid represented by the formula (I), aromatic diol represented by the formula (II), and aromatic dicarboxylic acid represented by the formula (III) with using a diaryl carbonate represented by the formula (IV).in-line-formulae description="In-line Formulae" end="lead"?HO—R1—COOH  (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?HO—R2—OH  (II)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?HOOC—R3—COOH  (III)in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 5084547 (1992-01-01), Pielartzik et al.
patent: 5408347 (1995-04-01), Murakami et al.
patent: 2002-3583 (2002-01-01), None

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