Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1996-12-23
1999-01-05
Mosley, Terressa
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528176, 528190, 528193, C08G 6400
Patent
active
058564233
ABSTRACT:
An improved process and apparatus for the production of a polyester or other condensation polymer is disclosed. In particular, polymerization is conducted in a reaction vessel equipped with a specially designed agitator that exposes the polymer melt partially filling the reaction vessel to inert gas flowing through the vessel. The agitator comprises a plurality of elements that lift a portion of a polymer melt in the reaction vessel and generate films of the polymer melt which films extends in planes that are parallel to the axis of the agitator and the flow of gas through the reaction vessel. In a preferred process, a melt of bis(2-hydroxyethyl) terephthalate, or its low molecular oligomers, obtained by esterifying terephthalic acid or transesterifying dimethyl terephthalate with ethylene glycol, is contacted with an inert gas at about atmospheric pressure in order to remove the reaction by-products and facilitate polymerization.
REFERENCES:
patent: 2578660 (1951-12-01), Auspos et al.
patent: 2647885 (1953-08-01), Billica
patent: 2789972 (1957-04-01), Reynolds et al.
patent: 2973341 (1961-02-01), Hippe et al.
patent: 3110547 (1963-11-01), Emmert
patent: 3248180 (1966-04-01), Kilpatrick
patent: 3390135 (1968-06-01), Seiner
patent: 3469618 (1969-09-01), Siclari et al.
patent: 3480587 (1969-11-01), Porter
patent: 3532151 (1970-10-01), Hachiya et al.
patent: 3545520 (1970-12-01), Siclari et al.
patent: 3594356 (1971-07-01), Hinton
patent: 3619145 (1971-11-01), Crawford
patent: 3819585 (1974-06-01), Funk et al.
patent: 4100142 (1978-07-01), Schaefer et al.
patent: 4212963 (1980-07-01), Lehr et al.
patent: 4612363 (1986-09-01), Sasaki et al.
patent: 4647650 (1987-03-01), Sasaki et al.
patent: 4835293 (1989-05-01), Bhatia
patent: 5064935 (1991-11-01), Jackson et al.
patent: 5677415 (1997-10-01), Bhatia
E. I. Du Pont de Nemours and Company
Mosley Terressa
LandOfFree
Apparatus and process for a polycondensation reaction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and process for a polycondensation reaction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and process for a polycondensation reaction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-863283