Foamable acrylic composition
US12012510B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2018 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Apr 27, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to foamed acrylic materials using both traditional chemical blowing agents as well as foamable microspheres. The acrylic foams have improved density reduction, optical properties, and insulation properties. The acrylic foams of the invention can be formed by traditional melt processing methods (extrusion, blow molding, etc.) as well as innovative foaming methods, such as foaming during or after polymerization. One novel method of the invention involves the use of expandable microspheres blended with monomers, the monomers then polymerized through bulk polymerization in cell cast, infusion, or compression molding processes. This method can be effectively used to produce composite foam structures, such as in combination with ELIUM® liquid resins from Arkema.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.