Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1978-03-23
1979-11-27
Danison, Walter C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
264176R, 264176F, 528298, 528302, 528305, 528307, C08G 6318
Patent
active
041762240
ABSTRACT:
The present invention is concerned with thermoplastic terephthalic acid copolyesters which crystallize more rapidly than homopolyethylene terephthalate and are based on a diol component which is about 98 to 99.9 mol % of ethylene glycol and the balance 2-ethylhexane-1,3-diol. The acid component may be up to about 10.0 mol % of other than terephthalic acid or its dimethyl ester.
This invention is also concerned with a process of synthesizing such copolyesters by esterifying or transesterifying the acid and diol components between about 150.degree. and 250.degree. C. in the presence of appropriate catalysts. The condensation product may be subject to polycondensation at about 200.degree. to 300.degree. C. under reduced pressure in the presence of esterification catalysts. In a preferred embodiment the 2-ethylhexane-1,3-diol is added after the initial reaction between the acid component and the ethylene glycol and preferably after the degree of polycondensation is greater than 4.
REFERENCES:
patent: 3692744 (1972-09-01), Rich et al.
patent: 3934067 (1976-01-01), Goldman et al.
patent: 4086212 (1978-04-01), Bier et al.
Wilfong, J. Polym. Sci., 54, (1961), pp. 385-410.
Abraham et al., Chemical Abstracts, vol. 82:59,347q (1975).
Bier Peter
Binsack Rudolf
Vernaleken Hugo
Bayer Aktiengesellschaft
Danison Walter C.
Harsh Gene
Pope Lawrence S.
LandOfFree
Poly (ethylene/alkylene) terephthalates which crystallize rapidl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Poly (ethylene/alkylene) terephthalates which crystallize rapidl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Poly (ethylene/alkylene) terephthalates which crystallize rapidl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-803418