Preparation of branched poly(alkylene terephthalates)

Details Preparation of branched poly(alkylene terephthalates) Preparation of branched poly(alkylene terephthalates)

1976-12-06

1979-01-02

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

260860, C08G 6326, C08G 6370

Patent

active

041327071

ABSTRACT:
A process for the preparation of branched poly(alkylene terephthalates) and mixtures of poly(alkylene terephthalates) is disclosed. The process comprises intimately blending the linear polyesters with a branching component, transforming the blend to a particulate state, and solid state polymerizing until a copolyester having the desired molecular weight is achieved.

REFERENCES:
patent: 3629366 (1971-12-01), Brinkmann
patent: 3843615 (1974-10-01), Herwig et al.
patent: 3953404 (1976-04-01), Borman
patent: 4064112 (1977-12-01), Rothe et al.

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