Process to produce poly(alkylene ether) glycol-containing polyesters
AssigneeE. I. Du Pont de Nemours and Company
InventorRichard Allen Hayes
Life of this patent
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Abstract
A process for producing a polyester that comprises 1 to 90 wt. % poly(alkylene ether) glycol. The process comprises the step of copolymerizing (i) a preformed polyester polymer having an inherent viscosity of at least 0.4 dL/g, (ii) a poly(alkylene ether) glycol, and (iii) a dicarboxylic acid or anhydride, to obtain a polyester comprising 1 to 90 wt. % poly(alkylene ether glycol).
Claims20
A process for producing a polyester that comprises 1 to 90 wt. % poly(alkylene ether) glycol comprising copolymerizing (i) a performed polyester polymer having an inherent viscosity of at least 0.4 dL/g, (ii) a poly(alkylene ether) glycol, and (iii) a dicarboxylic acid or anhydride, to obtain said polyester comprising said 1 to 90 wt. % poly(alkylene ether glycol), said process producing distillates comprising 50 weight percent volatile organic compounds or less, based on the total weight of the distillates.
Dependencies are inferred from the claim text.