Process for the continuous polymerization of polyethylene tereph

Details Process for the continuous polymerization of polyethylene tereph Process for the continuous polymerization of polyethylene tereph

1980-07-28

1981-06-02

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528309, 528480, C08G 6326

Patent

active

042712874

ABSTRACT:
Amorphous polyethylene terephthalate can be polycondensed in the solid phase to a higher molecular weight product by a continuous process involving preheating the polymer under forced motion, at least partially crystallizing the preheated polymer in a fixed bed, and polycondensing the polymer in a forced motion reactor at temperatures in the range of 220.degree. to 245.degree. C.

REFERENCES:
patent: 4064112 (1977-12-01), Roth et al.
patent: 4161578 (1979-07-01), Herron

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