Polyolefin microspheres
US6288189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1997 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | May 23, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Microspheres comprise a polymer including one or more of 1) a plurality of C.sub.3 or larger alpha-olefin units wherein the C.sub.3 or larger alpha-olefin units are incorporated into the polymer so as to give an average number of less than one branch point per C.sub.3 or larger alpha-olefin unit, 2) a plurality of C.sub.2 alpha-olefin units wherein the C.sub.2 alpha-olefin units are incorporated so as to give an average number of branch points greater than 0.01 per C.sub.2 alpha-olefin unit, and 3) cyclopentene or substituted cyclopentene, the microspheres having an average diameter in the range of 1 to 300 micrometers. Optionally, the polymer of the microspheres can be crosslinked. The microspheres can be prepared by suspension or dispersion polymerization processes using aqueous or organic reaction media. Powder coatings can be prepared from the microspheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.