Process for the preparation of sulfo-modified polyesters

Details Process for the preparation of sulfo-modified polyesters Process for the preparation of sulfo-modified polyesters

1984-03-09

1985-02-12

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528286, 528295, C08G 6304, C08G 6334

Patent

active

044992629

ABSTRACT:
Disclosed is a process for preparing sulfo-modified polyesters having an inherent viscosity of about 0.3 to about 0.9 and characterized by an improved planar stretch ratio relative to a given inherent viscosity, an improved rate of acetaldehyde generation relative to a given planar stretch ratio and increased buildup of melt viscosity. The process comprises the steps of (a) reacting (1) a dicarboxylic acid component comprising at least about 85 mole % terephthalic acid and about 0.1 to about 5.0 mole % of a difunctional sulfo-monomer, and (2) a glycol component comprising at least about 85 mole % ethylene glycol, the reaction being conducted in the presence of a catalyst system comprising a titanium compound and an organic salt of an alkali metal, (2) polycondensing the reaction product of step (1) in the presence of a phosphate ester until a polymer having the desired I.V. is obtained.

REFERENCES:
patent: 3404121 (1968-10-01), Barkey
patent: 3907754 (1975-09-01), Tershansy et al.
patent: 3962189 (1976-06-01), Russin et al.
patent: 3965071 (1976-06-01), McClelland
patent: 4208527 (1980-06-01), Horlbeck et al.
patent: 4454312 (1984-06-01), Kuze et al.

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