US 9,808,785 B2
High cohesive strength composite materials and, E.G., cigarette filters shaped therefrom
Robert Eberhardt, Malterdingen (DE); and Eric Perin, Taverny (FR)
Assigned to Rhodia Operations, Aubervilliers (FR)
Appl. No. 12/441,010
Filed by Robert Eberhardt, Malterdingen (DE); and Eric Perin, Taverny (FR)
PCT Filed Sep. 11, 2007, PCT No. PCT/EP2007/059515
§ 371(c)(1), (2), (4) Date Nov. 13, 2009,
PCT Pub. No. WO2008/031816, PCT Pub. Date Mar. 20, 2008.
Claims priority of application No. 06 08000 (FR), filed on Sep. 13, 2006.
Prior Publication US 2010/0043813 A1, Feb. 25, 2010
Int. Cl. B01J 20/28 (2006.01); A24D 3/16 (2006.01); B01J 20/06 (2006.01); B01J 20/08 (2006.01); B01J 20/10 (2006.01); B01J 20/16 (2006.01); B01J 20/20 (2006.01)
CPC B01J 20/28078 (2013.01) [A24D 3/163 (2013.01); A24D 3/166 (2013.01); B01J 20/06 (2013.01); B01J 20/08 (2013.01); B01J 20/103 (2013.01); B01J 20/16 (2013.01); B01J 20/20 (2013.01); B01J 20/2803 (2013.01); B01J 20/28004 (2013.01); B01J 20/2808 (2013.01); B01J 20/28019 (2013.01); B01J 20/28026 (2013.01); B01J 20/28057 (2013.01); B01J 20/28069 (2013.01); B01J 20/28083 (2013.01)] 34 Claims
 
1. A composite material comprised of at least one polymer (P) selected from celluloses, starches, and derivatives thereof and at least one compound (C) selected from mineral oxides, silicoaluminates and activated carbon, wherein the composite material has:
a median particle size of at least 100 μm;
a pore volume (Vd1), made up of pores of diameters ranging from 3.6 to 1,000 nm, of at least 0.2 cm3/g; and
a cohesion such that the amount of particles thereof having a size of less than 100 μm, obtained after an air pressure stress of 2 bar, is less than 1.5% by volume.