Hollow plastic spheres with controlled particle sizes
US11970599B2 · kind B2 · utility
0Cited by
14References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2022 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Mar 4, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/53
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are hollow polymer spheres prepared from one or more hydrophilic ethylenically unsaturated monomers containing acid functionality, one or more nonionic hydrophilic ethylenically unsaturated monomers, and one or more hydrophobic ethylenically unsaturated monomers. Disclosed is a process for preparing such hollow spheres. The hollow spheres exhibit controlled particle size, which can have larger particle sizes, narrow particle size distributions and high void volume percentages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.