Preparation of branched polyethylene terephthalate

Details Preparation of branched polyethylene terephthalate Preparation of branched polyethylene terephthalate

1993-07-12

1994-12-27

Acquah, Samuel A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528272, 528296, 528302, 528308, 5283086, C08F 2050

Patent

active

053767357

ABSTRACT:
Disclosed is an improved process for the preparation of branched polyethylene terephthalate and co-polyethylene terephthalate, having high melt viscosities. The process comprises carrying out the polymerization of the branched polyethylene terephthalate in intimate admixture with a small amount of isophthalic acid. Polyethylene terephthalate with high melt viscosities are obtained and are free from inhomogeneities.

REFERENCES:
patent: 4132707 (1979-01-01), Borman
patent: 4147738 (1979-04-01), Borman

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