Preparation of high molecular weight polyester

Details Preparation of high molecular weight polyester Preparation of high molecular weight polyester

1980-02-21

1981-03-03

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528309, 528480, 560 96, C08G 6326

Patent

active

042542537

ABSTRACT:
This invention comprises an improvement in the preparation of high molecular weight polyester, said improvement comprising simultaneously and continuously crystallizing, drying and heating low molecular weight particulated, melt polymerized linear condensation polyester prepolymer resin by subjecting said prepolymer resin to a high frequency energy field in the range from about 20.0 to about 300 megahertz for a period of time ranging from about 20 to 90 seconds.

REFERENCES:
patent: 4064112 (1977-12-01), Rothe et al.
patent: 4161578 (1979-07-01), Herron
patent: 4165420 (1979-08-01), Rinehart

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