Spun-dyed aramid fibers
US8933152B2 · kind B2 · utility
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Key dates
| Filing date | Oct 6, 2011 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Feb 20, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3492
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Spun-dyed aramid fibers, wherein spun-dyeing was performed with a completely organic pigment exhibiting the chemical structure of formula (I):wherein, independently from one another, R1 represents a substituent of formula Xa or a substituent of formula Xb:wherein Xa is linked via the group NH having two bonds in the structure represented by Xa, while Xb is linked via the carbon atom, which is in a para relationship with the NH2-group of Xb; and R2 represents H or NH2. The spun-dyed aramid fibers exhibit constant coloristic properties and wash proof properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.