METHODS OF SURFACE TREATING POROUS PARTICLES

WIPO Patent Application WO/2011/063392

A3

A method of treating porous particles, each porous particle having an external surface and a multiplicity of pores with interior pore surfaces, by contacting the external surface with a hydrophobic agent while causing the interior pore surfaces to remain substantially free of the hydrophobic agent. In certain illustrative embodiments, treating the external surfaces of the porous particles includes exposing the porous particles to at least one of water vapor, methanol vapor, or ethanol vapor; and subsequently exposing the porous particles to a second vapor comprising a reactive organosilane compound which reacts to form the hydrophobic agent. In some particular illustrative embodiments, at least a portion of the external surface of the treated porous particle includes hydrophobic groups, the hydrophobic groups selected from at least one of alkyl or aryl groups optionally substituted with fluorine, and siloxanes having alkyl groups, aryl groups, or combinations thereof.

BADRI BRINDA B (US)
DAVID MOSES M (US)
RONG HAOMING (US)
VEERARAGHAVAN BADRI (US)

PCT/US2010/057799

November 03, 2011

November 23, 2010

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3M INNOVATIVE PROPERTIES CO (US)
BADRI BRINDA B (US)
DAVID MOSES M (US)
RONG HAOMING (US)
VEERARAGHAVAN BADRI (US)

B01J20/32; A61L9/01; B01J2/30; C01B31/08; C08J9/36

WO2009012116A2

2009-01-22

US5082575A	1992-01-21
US20080053891A1	2008-03-06
US20090180967A1	2009-07-16
US20060244034A1	2006-11-02
US20030124564A1	2003-07-03
US6649222B1	2003-11-18

BAKER, James A. et al. (Office of Intellectual Property CounselPost Office Box 3342, Saint Paul Minnesota, US)

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