Polar polystyrene copolymers for enhanced foaming
US9914814B2 · kind B2 · utility
1Cited by
8References
8Claims
0Family size
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Key dates
| Filing date | Nov 5, 2014 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Nov 5, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2351/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making a foamable polystyrene composition includes combining a styrenic monomer and a co-monomer containing a polar functional group to obtain a mixture, subjecting the mixture to polymerization to obtain a styrenic co-polymer, and combining the styrenic co-polymer with a blowing agent in a foaming process to obtain foamed articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.