The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2001
Filed:
May. 23, 1997
Katherine A. Brown, Lake Elmo, MN (US);
Michael R. Kesti, Minneapolis, MN (US);
Edward G. Stewart, White Bear Lake, MN (US);
Joseph M. McGrath, Lake Elmo, MN (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
Microspheres comprise a polymer including one or more of 1) a plurality of C,or larger alpha-olefin units wherein the C,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,or larger alpha-olefin unit, 2) a plurality of C,alpha-olefin units wherein the C,alpha-olefin units are incorporated so as to give an average number of branch points greater than 0.01 per C,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.