Polyimide-titania hybrid materials, their preparation, and film prepared from the materials
US7803896B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2007 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Jan 20, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L79/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to polyimide-titania hybrid thin film, which possesses relatively good surface planarization, excellent thermal properties (400<Td<550° C.), tunable refractive index (1.571<n<1.993), and highly optical transparency in the visible range. The present invention also relates to a method for preparing the polyimide-titania hybrid materials, which comprises producing a polyimide containing pendent and/or terminal carboxylic acid, coordinating the carboxylic acid with titanium of titanium alkoxide and sol-gel reacting of titanium alkoxide, to enhance the interaction between polyimide and titania and produce the polyimide-titania hybrid materials without macrophase separation. The present polyimide-titania hybrid materials are useful to produce the thin film having the above features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.