Spinning and stability of solution-dyed nylon fibers
US6358458B1 · kind B1 · utility
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16References
16Claims
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Key dates
| Filing date | Nov 11, 1999 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Nov 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2976
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.