Process of preparing polytetramethylene terephthalate

Details Process of preparing polytetramethylene terephthalate Process of preparing polytetramethylene terephthalate

1974-11-13

1976-02-03

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4575F, 260 4575S, 260 4575T, 260 4585B, 260 4595C, 260 4595H, 260 4595R, 260 75R, 260 75T, C08G 6314, C08K 505, C08K 558, C08K 513

Patent

active

039364216

ABSTRACT:
A process for preparing a polyester predominantly comprised of the units derived from terephthalic acid and butanediol-1,4 is provided. The esterification or transesterification is performed in the presence of minor amounts of a catalyst combination comprising an organo-titanium compound and an organo-tin compound. The undesirable formation of tetrahydrofuran can be avoided or minimized.

REFERENCES:
patent: 2437232 (1948-03-01), Rothrock et al.
patent: 2465319 (1949-03-01), Whinfield et al.
patent: 3285855 (1966-11-01), Dexter et al.
patent: 3361846 (1968-01-01), Gleim et al.
patent: 3670489 (1972-06-01), Jackson et al.
patent: 3763109 (1973-10-01), Witsiepe
patent: 3796691 (1974-03-01), Chimura et al.

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