Method for producing polyester compositions
AssigneeToray Industries, Inc.
InventorsMayumi Matsumoto, Hiroji Kojima, Jun Sakamoto
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Abstract
A process of producing a polyester composition includes carrying out an esterification reaction of a dicarboxylic acid component with a diol component, and then carrying out a polycondensation reaction, wherein the diol component is added twice or more during a time from completion of the esterification reaction until beginning the polycondensation reaction, and alkali metal phosphate is added with an amount of COOH terminal groups of an esterification reactant being not more than 150 eq/ton.
Claims13
A process of producing a polyester composition comprising:
- carrying out an esterification reaction of a dicarboxylic acid component with a diol component;
- and then
- carrying out a polycondensation reaction,
- wherein the diol component is added twice or more during a time from completion of the esterification reaction until beginning the polycondensation reaction, and alkali metal phosphate is added with an amount of COOH terminal groups of an esterification reactant being not more than 150 eq/ton.
A process of producing a polyester composition comprising:
- carrying out an esterification reaction of a dicarboxylic acid component with a dial component;
- and then
- carrying out a polycondensation reaction,
- wherein a tri- or more functional copolymer component is added during a time until a beginning of the polycondensation reaction.
Dependencies are inferred from the claim text.