Aromatic copolyesters

Details Aromatic copolyesters Aromatic copolyesters

1988-01-14

1989-09-19

Foelak, Morton

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

Synthetic resins

From carboxylic acid or derivative thereof

528294, 528305, C08G 1200, C08G 6368

Patent

active

048682780

ABSTRACT:
Melt processable, aromatic copolyesters containing 15 to 40 mole % of 4-oxybenzoyl moieties from 0.25 to less than 2.5 mole % of randomizing moieties, which are preferably 2-6 oxy naphthoyl moieties, the balance of moieties being equimolar proportions of moieties derived from hydroquinone and isophthalic acid. The preferred polymers are made by a dispersion polymerization process using as a dispersion aid a finely divided particulate material having at least 95% by weight of particles with at least one dimension less than 1 micron.

REFERENCES:
patent: 4618699 (1986-10-01), Fialla
patent: 4652591 (1987-03-01), Londrigan
patent: 4732959 (1988-03-01), Otani et al.

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