Process for producing film and fiber-forming polyalkylene tereph

Details Process for producing film and fiber-forming polyalkylene tereph Process for producing film and fiber-forming polyalkylene tereph

1977-01-21

1978-08-01

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

560 92, 528285, 528305, C08G 6314

Patent

active

041042638

ABSTRACT:
High molecular weight, colorless polyesters suitable for shaping into filaments and films are obtained using novel catalysts selected from the group consisting of reaction products of specified antimony or zirconium (IV) compounds with 1) a carboxylate of calcium, manganese or zinc and 2) an acid anhydride, alcohol or glycol. The molar ratio of the antimony or zirconium compound to the aforementioned carboxylate is between 1:1 and 1:6. The catalysts are active in both transesterification and polycondensation. The rates of these reactions are more rapid than can be achieved using prior art catalysts.

REFERENCES:
patent: 2720504 (1955-10-01), Caldwell et al.
patent: 2951060 (1960-08-01), Billica
patent: 3009903 (1961-11-01), Lincoln
patent: 3110693 (1963-11-01), Ure
patent: 3415860 (1968-12-01), Thomas
patent: 3484410 (1969-12-01), Lazarus et al.
patent: 3624049 (1971-11-01), Ventura et al.
patent: 3705133 (1972-12-01), Lazarus et al.

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