Dispersion of nano-alumina in a resin or solvent system
US7763312B2 · kind B2 · utility
2Cited by
10References
12Claims
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Key dates
| Filing date | Apr 17, 2006 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Feb 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dispersion of sol-derived nano-alumina in an organic solvent mixture containing a 1,2-diol with simple agitation. A thixotropic solution is obtained at 20% alumina in ethylene glycol, while a low viscosity (<100 cps) solution is possible for a 20% alumina in (1:1, N-methylpyrrolidone-ethylene glycol) solution. Alumina particles are de-agglomerated with minimal agitation. The resulting solution or resin solution is stable to settling and re-agglomeration. The nano-alumina dispersion solution can then be mixed with an imide coating to provide for a wire coating to give the wire improved abrasion, COF, and corona resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.