Acrylic polyvinyl acetal films comprising a second layer
US11034830B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Dec 13, 2016 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Feb 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A film is described comprising a first film layer having a Tg ranging from 30° C. to 60° C. The first film layer comprises a (meth)acrylic polymer and polyvinyl acetal polymer composition. The film further comprises a second layer proximate the first film layer. The second layer is different than the first film layer. The second may be a cured (meth)acrylic polymer film or coating; a backing such as thermoplastic polymer, woven or nonwoven fabrics, metal foils, paper, foams; or a coverfilm such as a fluoropolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.