Expandable vinyl aromatic polymers
US11834563B2 · kind B2 · utility
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1References
12Claims
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Key dates
| Filing date | Oct 6, 2017 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Jan 22, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2491/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention is related to expandable vinyl aromatic polymers comprising comminuted coke, said comminuted coke having an average stack height (Lc) of carbon crystallites at least 4 nm, a volume median particle diameter (D50) comprised between 1 and less than 5 μm and being characterized by a span (D90−D10)/D50 below 2.5 Molded parts produced from the expandable vinyl aromatic polymers prove low thermal conductivities for a low foam density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.