Copolyesters, molded articles from the same and aromatic triols

Details Copolyesters, molded articles from the same and aromatic triols Copolyesters, molded articles from the same and aromatic triols

1996-01-31

1997-07-15

Acquah, Samuel A.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528190, 528195, 528212, 528219, 528272, 528294, 528295, 528298, 528300, 528308, 5283086, 528503, 264540, 428 357, 568 28, 568 33, 568 34, 568593, 568607, C08G 6318, B32B 108, C07C 4311, B29C 4700, B29C 1707

Patent

active

056484496

ABSTRACT:
A copolyester consisting essentially of ethylene terephthalate units and further comprising 0.01 to 1 mole % based on the sum of the moles of total diol units and the moles of triol units of a triol unit represented by the following formula (I) and/or a triol unit represented by the following formula (II). ##STR1## wherein A is a group represented by formula --CH.sub.2 CH.sub.2 -- or formula --CH(CH.sub.3)CH.sub.2 --, B is a divalent hydrocarbon group, --CO--, --SO.sub.2 --, --0-- or a direct bond (-), and p, q, r, s, t and u are each an integer of 1 to 8. A process for producing the same and molded articles (in particular extrusion blow molded articles) therefrom. The copolyesters of the present invention are applicable to melt moldings accompanying melt extrusion, in particular extrusion blow molding, where parisons therefrom have good draw-down tendency and blow moldability. The copolyesters can give, without causing troubles on molding, molded articles, in particular extrusion blow molded articles, having excellent transparency, heat resistance, moisture resistance and like properties. Aromatic triols usable for producing the above copolyesters are also provided.

REFERENCES:
patent: 4161579 (1979-07-01), Edelman et al.
patent: 4182841 (1980-01-01), Hauenstein
patent: 4188357 (1980-02-01), Go
patent: 4219527 (1980-08-01), Edelman
patent: 4234708 (1980-11-01), Edelman
patent: 4547563 (1985-10-01), Cholod

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