Composite materials comprising PPTA and nanotubes
US7534486B2 · kind B2 · utility
30Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2005 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Sep 18, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention pertains to a composite material comprising PPTA (poly-p-phenyleneterephthalamide) and nanotubes having an aspect ratio of at least 100 and a cross-sectional diameter of 5 nm or less, the composite material containing up to 12 wt. % of nanotubes, obtainable by adding the nanotubes to sulfuric acid, decreasing the temperature to solidify the mixture, adding PPTA to the solid mixture, heating to above the solidifying point and mixing the mixture, and spinning, casting, or molding the mixture to the composite material.The process comprises the steps:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.