Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-02-20
1993-02-09
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528287, 5283086, 525437, 525444, 524128, 524539, 524605, 524710, C08G 63692, C08G 63695
Patent
active
051854260
ABSTRACT:
A continuous direct esterification and polycondensation process is disclosed for the production of polyester comprising units of ethylene terephthalate as the major repeating units by supplying a slurry of mainly terephthalic acid and ethylene glycol to bis(betahydroxyethyl) terephthalate or its oligomer so as to carry out esterification, followed by polycondensation whereby the resulting oligomer is kept under increasingly reduced pressure, characterized in that a stabilizing solution of an aliphatic diol containing a diethyl or tributhyl phosphite and a hindered phenolic phosphonate is added to the reaction mixture before the start of the polycondensation.
REFERENCES:
patent: 3988301 (1974-10-01), Jeurissen et al.
patent: 4086212 (1978-04-01), Bier et al.
patent: 4107149 (1978-08-01), Bier et al.
patent: 4314928 (1982-02-01), Bier et al.
patent: 4385145 (1983-05-01), Horn, Jr.
patent: 4440924 (1984-04-01), Kuze et al.
patent: 4454312 (1984-06-01), Kuze et al.
patent: 4604453 (1986-08-01), Kuze et al.
Marien August M.
Verheijen Johannes M.
Acquah Sam A.
Agfa-Gevaert N.V.
Kight III John
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