Polyester composition with improved dyeing properties
AssigneeParkdale Incorporated
InventorRobert Alton Usher
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Abstract
A copolymer composition is disclosed with advantages for textile fibers, yarns, blended yarns, fabrics, and garments. The composition includes polyester copolymer, between about 9.5 and 10.5 percent adipic acid based on the amount of copolymer, between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of copolymer, and between about 3.4 and 4.2 percent polyethylene glycol based on the amount of copolymer.
Claims11
A composition with advantages for textile fibers, the composition consisting essentially of a melt of:
- polyester precursors selected from the group consisting of terephthalic acid, dimethyl terephthalate, and ethylene glycol;
- between about 9.5 and 10.5 weight percent adipic acid based on the amount of melt;
- between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of melt;
- between about 3.4 and 4.2 weight percent polyethylene glycol based on the amount of melt;
- and
- between about 2 and 3 weight percent diethylene glycol based on the amount of melt.
A method of forming a composition having advantages for textile fibers and consisting essentially of a melt, the method comprising:
- forming the melt, wherein the melt comprises:
- polyester precursors selected from the group consisting of terephthalic acid, dimethyl terephthalate, and ethylene glycol;
- between about 9.5 and 10.5 weight percent adipic acid based on the amount of melt;
- between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of melt;
- between about 3.4 and 4.2 weight percent polyethylene glycol based on the amount of melt;
- and
- between about 2 and 3 weight percent diethylene glycol based on the amount of melt;
- and
- maintaining the melt at a temperature of between about 265° C. and 280° C., and at an intrinsic viscosity of between about 0.58 and 0.82.
Dependencies are inferred from the claim text.