Polyvinyl acetal and cellulose ester multilayer interlayers
US10293577B2 · kind B2 · utility
3Cited by
23References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2015 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Jul 21, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2607/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multilayer interlayer structure having a first and second polyvinyl acetal (poly(vinyl acetal)) layer and a cellulose ester layer having a thickness of at least 10 mils disposed between the first and second poly(vinyl acetal) layers. The cellulose ester layer can have a higher storage modulus and/or higher Tg than at least one of the poly(vinyl acetal) layers. The interlayer structure is useful to make glass panels having high stiffness and which possess good optical clarity for a variety of applications, including outdoor structural applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.