Polytrimethylene terephthalate having a low level of acrolein and a process for producing the same
US7381787B2 · kind B2 · utility
1Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2005 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/92
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a process of reducing acrolein by product from polytrimethylene terephthalate using selected phosphorus compounds to contact the polytrimethylene terephthalate or reactants in the process of producing polytrimethylene terephthalate. The selected phosphorus compounds are retained in the polytrimethylene terephthalate. The present invention also provides polytrimethylene terephthalate compositions containing amounts of phosphorus compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.