Removal of color from thermoplastics
US10047209B2 · kind B2 · utility
6Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2016 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Jun 29, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Process of decolorizing dyed thermoplastics are provided that includes intermixing a dyed thermoplastic with a decolorization agent solution at a temperature that maintains the crystalline structure of the thermoplastic. The processes for the first time are capable of removing substantial portions of dye from the thermoplastic providing a material that is suitable for recycling processes and use in subsequent recycled articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.