Polyester and process for preparation thereof

Details Polyester and process for preparation thereof Polyester and process for preparation thereof

1985-04-15

1987-05-05

Phynes, Lucille M.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528180, C08G 6312

Patent

active

046634231

ABSTRACT:
A polyester formed by adding compounds of the following formulae I and II to a reaction product of terephthalic acid or a dicarboxylic acid mixture mainly composed of terephthalic acid or an ester-forming derivative thereof with at least one glycol or an ester-forming derivative thereof, having a melt electrical resistance of not higher than 1600.times.10.sup.6 .OMEGA. and a softening point higher than the softening point derived from Flory's equation for the melting temperature of random copolymers but lower than the softening point of a polyester obtained by adding a compound of formula I alone: ##STR1## wherein each R independently represents a hydrogen atom or an alkyl group having 1 or 2 carbon atoms.

REFERENCES:
patent: 3288755 (1966-11-01), Griehl et al.
patent: 3804805 (1974-04-01), Kuhfuss et al.
patent: 4287332 (1981-09-01), Jackson et al.
patent: 4415726 (1983-11-01), Tanji et al.
patent: 4429104 (1984-01-01), Feasey
patent: 4446302 (1984-05-01), Sandhu et al.
W. J. Jackson, Jr. et al., Liquid Crystal Polymers. I. Preparation and Properties of p-Hydroxybenzoic Acid Copolyesters, J. Polymer Science, 14, 2043-2058.

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