Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1988-08-22
1990-08-28
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528126, 528128, 528171, 528174, 528214, C08G 6540
Patent
active
049526650
ABSTRACT:
An improved process for producing aromatic polyethers by condensation polymerizing aromatic dihydroxy compounds represented by the general formula: HO--Ar--OH and aromatic dichloro compounds represented by the general formula: Cl--Ar.sup.1 --Y--Ar.sup.2 --Cl, or condensation polymerizing monohydroxymonochloro aromatic compounds represented by the general formula: HO--Ar.sup.1 --Y--Ar.sup.2 --Cl (in the above formulae, Ar, Ar.sup.1, Ar.sup.2 are as defined in the specification) in the presence of alkali metal compounds comprising a combination of alkali metal carbonates comprising carbonate and/or hydrogencarbonate of an alkali metal, e.g., potassium, and alkali metal fluorides.
In accordance with the present process, high molecular weight aromatic polyethers can be efficiently produced from aromatic chloro compounds which are inexpensive and easily available.
REFERENCES:
patent: 3941748 (1976-03-01), King
patent: 4113699 (1978-09-01), Rose et al.
patent: 4638044 (1987-01-01), Kelsey
Journal of Polymer Science, vol. 24, No. 2, Feb. 1986, New York, pp. 287-300; J. L. Hedrick et al.: "Radiation Resistant Amorphous-all Aromatic Polyarylene Ether Sulfones: Synthesis, Characterization, and Mechanical Properties", *pp. 289-291.
Ebata Shuji
Higuchi Yasushi
Anderson Harold D.
Mitsubishi Gas Chemical Company Ltd.
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