Minimizing ozone fading in dyed polyamides by treating same with substituted piperidine thioureas
US4304568A · kind A · utility
7Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1980 |
| Grant date | Dec 8, 1981 |
| Priority date | — |
| Expiry date | May 19, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/26
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed a method for minimizing ozone fading in dyed polyamides by treating the dyed polyamide with a substituted piperidine thiourea of the formula ##STR1## where R is a lower alkyl radical having 1-5 carbon atoms or phenyl. The treated dyed polyamides, preferably in fiber form, display minimize ozone fade without a reduction in light stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.