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US 10,174,454 B2Granted
Polyester composition with improved dyeing properties
AssigneeParkdale Incorporated
InventorRobert Alton Usher, Jr.
Life of this patent
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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 4.5 and 5.5 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, and consisting essentially of a melt of:
- polyester precursors selected from the group consisting of terephthalic acid, dimethyl terephthalate, and ethylene glycol;
- between about 4.5 and 5.5 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;
- and containing diethylene glycol in an amount of less than 2 percent based on the amount of polyester copolymer;
- said melt being maintained at a temperature of between about 285° F. and 295° F., and at an intrinsic viscosity of between about 0.58 and 0.82.
4 more elements
Dependencies are inferred from the claim text.