Filing Information

Inventor(s)	Larry Royer · Michael Meshey · Ufuk Senturk ·
Assignee(s)	Potters Industries, Inc. ·  View assignee updates
Attorney/Agent(s)	Buchanan Ingersoll & Rooney PC ·
Primary Examiner	Edward J Cain ·
Application Number	US12342260
Filing date	12/23/2008
Issue date	12/07/2010
Prior Publication Data	US20100160527 - 06/24/2010
Predicted expiration date	02/02/2029
Patent term adjustment	41
U.S. Classifications	523/223  · 106/467  · 106/409  ·
International Classifications	C08K716  ·
Kind Code	B2

Patent Family

Abstract

This invention relates to inorganic microspheres having a relatively narrow particle size distribution, which may be prepared by spheridization of zeolite crystals. The microspheres are particularly useful for whitening polymer compositions and in other filler applications.

Independent Claims | See all claims (19)

1. 1. Substantially solid inorganic microspheres produced from crystals of a synthetic zeolite having a d50 value from 1 to 50 microns.
2. 16. Substantially solid inorganic microspheres having a d50 value from 1 to 50 microns and a size distribution ratio (d90−d10)/d50 from 0.5 to 2, wherein said inorganic microspheres have been produced from crystals of a synthetic zeolite, provide a Hunter L value of at least 80 when incorporated at a 20 weight percent level in a cured polyester composite, and have a true density of at least 1.9 g/cm3 and wherein a portion of said inorganic microspheres are at least partially crystalline and a portion of said inorganic microspheres are fully amorphous or partially amorphous.
3. 17. Substantially solid inorganic microspheres having a d50 value from 3 to 10 microns and a size distribution ratio (d90−d10)/d50 from 0.6 to 1.5, wherein said inorganic microspheres have been produced from crystals of a synthetic zeolite, provide a Hunter L value of at least 85 when incorporated at a 20 weight percent level in a cured polyester composite, are comprised of greater than 25 weight % Al2O3, and have a true density of at least 1.9 g/cm3 and wherein a portion of said inorganic microspheres are at least partially crystalline and a portion of said inorganic microspheres are fully amorphous or partially amorphous.