Process for preventing color migration in colored moldings of polyoxymethylene resins
US4331439A · kind A · utility
1Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Dec 19, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P5/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention deals with the coloring or dyeing of polyoxymethylene resins and particularly with preventing color migration therein. Color migration in molded articles of colored polyoxymethylene resins is prevented by dyeing the articles with disperse dyes, and treating the articles with a compound having one or more isocyanate groups, for example, a urethane prepolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.