High productivity spandex fiber process and product
US6916896B2 · kind B2 · utility
2Cited by
24References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | May 5, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Commercially acceptable spandex can be prepared with greater efficiency, improved consistency and at lower costs from a high-solids content polyurethaneurea polymer solution. The polyurethaneurea is prepared using a combination of 4,4′-MDI and 2,4′-MDI, and an amount of chain extenders and chain terminators such that the polymer solution, prior to spinning, is highly soluble and has an appropriate pre-spun IV and primary amine content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.