Basf Corporation

Akzona Incorporated

Bobby J Bailey

Stanley A McIntosh

Dean R Gadoury

Matthew B Hoyt

Harry Y Hu

O Keith Gannon

Gary W Shore

Phillip E Wilson

Dyeable and dyed filaments have a core and a sheath which entirely surrounds the core. The core is formed of a core polymer which is susceptible to dyeing by a dye bath chemical, while the sheath is formed of a sheath polymer which is resistant to dyeing by the dye bath chemical. When the filament is brought into contact with a dye bath containing the dye chemical, the dye chemical in the dye bath will physically diffuse or migrate through the sheath polymer to cause the core polymer to be dyed a color of the dye bath chemical, while the sheath polymer is substantially undyed thereby.

Dyed sheath/core fibers and methods of making same

Stabilized solution-dyed fiber is made by melting a polyamide which is amide monomers polymerized in the presence of at least one hindered piperidine compound, coloring the melted polyamide, and spinning the colored polyamide into fibers that have about 40% or better retained tenacity after 2125 kJ exposure to xenon arc radiation as per AATCC Test Method 16-1993, &ldquo;Colorfastness to Light,&rdquo; Option E. Copper stabilizers are unnecesssary.

Spinning and stability of solution-dyed nylon fibers

Stabilized solution-dyed fiber is made by melting a polyamide which is amide monomers polymerized in the presence of at least one hindered piperidine compound, coloring the melted polyamide, and spinning the colored polyamide into fibers that have about 40% or better retained tenacity after 2125 kJ exposure to xenon arc radiation as per AATCC Test Method 16-1993, 'Colorfastness to Light,' Option E. Copper stabilizers are unnecesssary.

A process for preparing photochemically stable dyed nylon compositions includes providing to a dyebath a shaped article of poly(epsilon-caprolactam) hydrolytically polymerized in the presence of water, a carboxylic acid chain regulator and a hindered piperidine derivative; and in the dyebath, dyeing the shaped article with one or more metalized or nonmetalized acid dyestuffs.

Photochemically stabilized polyamide compositions

A predominantly polyester fabric has a multi-colored pattern. The fabric includes at least one non-aromatic, partially crystalline polymethylolefin yarn melting above about 180.degree. as less than 50%, by weight, of the fabric, and polyester yarn. The polymethylpentene yarn and the polyester yarn are fabricated in a predetermined pattern and then piece dyed with disperse dye techniques.

Multi-colored disperse dyeable fabric: polyester and poly-methyl-olefin

A new and useful indigo-dyeable polyester is disclosed, and process for making same, for which a suitable polyester has had applied to its surface an amount of a suitable indigo dye retaining compound effective to provide said polyester with indigo fastness properties similar to cotton. The new indigo dyeable polyester may be employed in the manufacture of a staple material blended with cotton in predetermined amounts depending on the end use desired, e.g., 50:50 by weight for cotton denims (e.g., jeans). Preferable indigo dye retaining compounds comprise monomers dioleylamine and dicocoamine. Other suitable indigo dye retaining monomers are disclosed, inter alia, having the formula: ##STR1## wherein R.sub.1 is alkyl or alkenyl of about 10-18 carbons; R.sub.2 is alkyl, alkylaryl, or alkenyl of about 8-18 carbons, R--CH.sub.2 --NO.sub.2, R--CH.dbd.NH, where R is alkyl or alkenyl from one to eighteen carbons; and R.sub.3 is hydrogen or alkyl from one to about twelve carbons. A process is also disclosed for treating a meltspun suitable polyester fiber with an amount (e.g., about 0.25%-2.0% by weight) of a suitable indigo dye retaining compound effective to provide said polyester fiber with indigo fastness properties similar to cotton.

Growing community of inventors

Candler, NC, United States of America

Bobby J Bailey