Dyeable spandex
US7838617B2 · kind B2 · utility
3Cited by
35References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2004 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Feb 6, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/906
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Commercial 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. Such spandex fibers, and the fabrics and garments comprising them, have good dyeability and colorfastness, as well as other desirable characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.