Polyesters of naphthalene carboxylic acids and hydroxy alkoxydip

Details Polyesters of naphthalene carboxylic acids and hydroxy alkoxydip Polyesters of naphthalene carboxylic acids and hydroxy alkoxydip

1975-01-21

1978-01-03

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

264328, C08G 6318, C08G 6366, C08G 6368

Patent

active

040666247

ABSTRACT:
A process for preparing polyesters, which comprises reacting (A) a difunctional carboxylic acid component containing at least 50 mol% of a naphthalene dicarboxylic acid and/or its ester-forming derivative, (B) a diol component containing an aromatic group and at least 50 mol% of a 4,4'-bis-(.omega.-hydroxyalkoxy)diphenylsulfone and (C) an aliphatic or alicyclic diol component, the molar ratio of component (B) to component (A) being 0.05-1, and the molar ratio of the sum of components (B) and (C) to component (A) being 1.1-3.0; and then polymerizing the resulting reaction product in the presence of a catalyst while distilling off the excess of the component (C) out of the reaction system, thereby to form a polymer having a reduced viscosity of at least 0.5.

REFERENCES:
patent: 3558557 (1971-01-01), Hrach et al.
patent: 3865789 (1975-02-01), Wyhof et al.
patent: 3935166 (1976-01-01), Kanai et al.

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