E.i. Dupont De Nemours and Company

Raymond Longhi

Nirmal K Agarwal

Sundar M Rao

Joseph V Kurian

Jing Chung Chang

Richard Lee Dommel

A process of making a pigmented shaped article comprising: (a) providing polytrimethylene terephthalate chips and two or more colored pigmented chips each containing at least one different color pigment; (b) heating the polytrimethylene terephthalate chips and colored pigmented chips to a temperature of about 200-about 280&deg; C. to melt the chips and form a polymer composition comprising the polytrimethylene terephthalate and at least one color pigment; and (c) forming a shaped article from the polymer composition.

Process for preparing pigmented shaped articles comprising poly (trimethylene terephthalate)

An improved process for preparing pigmented drawn polyamide fibers is disclosed, the improvement being the improved processability obtained from the use of an N,N'-dialkyl polycarbonamide as a carrier polymer for the pigment dispersion.

Polyamide pigment dispersion

An improved process for preparing polyamide hollow filaments wherein an N,N'-dialkyl polycarbonamide is melt blended with the molten fiber-forming polyamide prior to spinning into filaments. The polycarbonamide substantially decreases the collapsing of the voids which naturally occurs immediately .after spinning and before the filaments are completely cool.

Polyamide hollow filaments

An improved process for preparing polyamide hollow filaments wherein an N,N'-dialkyl polycarbonamide is melt blended with the molten fiber-forming polyamide prior to spinning into filaments. The polycarbonamide substantially decreases the collapsing of the voids which naturally occurs immediately after spinning and before the filaments are completely cool.

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Seaford, DE, United States of America

Raymond Longhi