Polyvinyl butyral films prepared by coating methods
US7012746B2 · kind B2 · utility
10Cited by
53References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2002 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Jan 31, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2329/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of film fabrication is taught that uses a coating and drying apparatus to fabricate resin films suitable for optical applications. In particular, polyvinyl butyral films are prepared by simultaneous application of multiple liquid layers to a moving carrier substrate. After solvent removal, the polyvinyl butyral films are peeled from the sacrificial carrier substrate. Polyvinyl butyral films prepared by the current invention exhibit good clarity and low birefringence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.