Hydrophobic high heat optical acrylic copolymers
US12325765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2020 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Jan 21, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to acrylic copolymers and terpolymers incorporating high Tg, hydrophobic (meth)acrylates that have high thermal stability and excellent optical properties. These copolymers are optically clear, and provide a copolymer having a Tg of 115-140 C, along with sufficiently high molecular weight. The copolymer is found to exhibit high heat resistance, high light transmission, low haze, low moisture uptake, excellent environmental stability, excellent high temperature thermal stability, and excellent mechanical properties, along with excellent UV resistance. The copolymer, or terpolymer may be used to form lighting pipes, thin wall parts, optical lenses, extruded films, (co-)extruded sheets/profiles, thermo-formable sheets, cast sheets, composites, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.