Windmill propeller blade and method of making same
US8829101B2 · kind B2 · utility
4Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2009 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Dec 3, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49337
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A windmill blade which comprises reinforcing fibers in a toughened resin matrix. The resin matrix is made from a composition which comprises (a) one or more epoxy resins and/or one or more epoxy vinyl ester resins, (b) one or more reactive diluents, and (c) at least one amphiphilic block copolymer. The amphiphilic block copolymer comprises at least two different polyether blocks and is present in the composition in an amount of from about 0.5% to about 10% by volume, based on the total volume of the matrix composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.