Polymeric composite articles comprising the heterogeneous surface/bulk distribution of discrete phase
US11008453B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/53
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a thermoplastic article having a continuous polymeric phase and a discontinuous discrete phase distributed within the continuous phase. The discontinuous phase may be inorganic materials or an organic phase. The volume fraction of the discrete phase at the surface of the article is plus or minus 15% of the concentration of the additive as compared to the concentration of the additive in the bulk of the material (>20 micrometers). The invention also relates an article where the discrete additive forms domains in the surface region—potentially beneficial for gloss reduction or electrical conductivity. The invention finally relates to a process for forming a thermoplastic article with surface additive enhancement, with inclusion of inductive heating of one or more surfaces of the mold to induce the unique distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.