Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1983-02-03
1984-02-07
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528176, 528182, 528190, 528194, C08G 6318
Patent
active
044304935
ABSTRACT:
In an improved process for the preparation of aromatic polyesters by polycondensation of diphenols with aromatic dicarboxylic acid halides such as isophthalic acid chloride and/or terephthalic acid chloride, by a two-phase interface polycondensation method wherein a fine dispersion is produced from an aqueous phase consisting of a solution of diphenol, alkali metal hydroxide for the formation of the alkali metal diphenolate in a stoichiometric ratio or in a slight excess and a phase transfer catalyst like triethylbenzylammonium chloride, tetrabutyl ammonium iodide or crown ether in a mixture of water and an organic solvent as a solubilizer with the organic liquid phase consisting of a solution of the acid chloride in a halogenated solvent, where the diphenolate, transferred to the liquid phase by the phase transfer catalyst, reacts with the acid chloride in a polycondensation reaction for the formation of the polyester, and the polyester formed remains dissolved in the organic phase the improvement comprising using as the solubilizer an alkanol of 2 to 5 carbon atoms or an alkoxy alkanol of 2 to 5 carbon atoms and polyester esters produced thereby.
REFERENCES:
patent: 3216970 (1965-11-01), Conix
patent: 3234167 (1966-02-01), Sweeny
patent: 4066623 (1978-01-01), Besso et al.
patent: 4201855 (1980-05-01), Segal
Isovolta Oesterreichische Isolierstoffwerke Aktiengesellschaft
Lee Lester L.
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