Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-03-28
1997-03-04
Mosley, Terressa
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
502153, 502155, 502161, 502171, 502208, 502353, 528193, 528194, 528271, 528272, 528274, 528275, 528277, 528278, 528280, 528281, 528283, 528285, 526 71, C08G 6300, C08G 6302, C08G 6378, C08G 6382
Patent
active
056080328
ABSTRACT:
A catalyst composition for use in a polycondensation reaction for making poly(ethylene terephthalate) from terephthalic acid comprising: (a) an antimony salt catalyst present in a range from about 10 to about 1,000 ppm; (b) a metal salt catalyst of at least one of cobalt, magnesium, zinc, manganese, calcium, and lead, present in a range from about 10 to about 500 ppm; and (c) a phosphorus salt co-catalyst selected from the group consisting of alkali metal phosphates, alkali metal phosphites, alkali metal hypophosphites and alkali metal polyphosphates, present in a range from about 10 to about 500 ppm; all amounts are based on the metallic or phosphorus element relative to the theoretical yield of the poly(ethylene terephthalate), by weight, to be made from the terephthalic acid. The catalyst composition was found to have increased the reaction rate in the production of poly(ethylene terephthalate), as well as improved the color of the produced product, by reducing the degree of yellowness in the final poly(ethylene terephthalate) product. Attenuation of the yellowish color indicates a reduction in the amount of undesired side reaction product.
REFERENCES:
patent: 5008230 (1991-04-01), Nichols
patent: 5019640 (1991-05-01), Engel-Bader et al.
patent: 5116938 (1992-05-01), Engel-Bader et al.
patent: 5135697 (1992-08-01), Roderiguez et al.
patent: 5153164 (1992-10-01), Mason
patent: 5162488 (1992-11-01), Mason
patent: 5166311 (1992-11-01), Nichols
patent: 5250333 (1993-10-01), McNeely et al.
patent: 5272246 (1993-12-01), Roderiguez et al.
patent: 5340909 (1994-08-01), Doerr et al.
PBT-Dialog research 109: 746272 vol. 109 (1988) Abstract.
PET-Dialog research 87: 168630 abstract (1994).
PET-Dialog research 115: 136993 abstract (1994).
"Antimony Compounds" Encyclopedia of Chemical Technology vol. 3 (1978) pp. 107-108.
Chao Yu-Shan
Chen Jong-Wu
Yuo Wu-Bin
Industrial Technology Research Institute
Liauh W. Wayne
Mosley Terressa
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