	US 7,514,552 B2
	Cellulose powder
Naoaki Yamasaki, Nobeoka (Japan); Kazuhiro Obae, Nobeoka (Japan); and Ichiro Ibuki, Nobeoka (Japan)
Assigned to Asahi Kasei Chemicals Corporation, Tokyo (Japan)
Appl. No. 10/557,052 PCT Filed May 28, 2004, PCT No. PCT/JP2004/007379 § 371(c)(1), (2), (4) Date Nov. 16, 2005, PCT Pub. No. WO2004/106416, PCT Pub. Date Dec. 09, 2004.
Claims priority of application No. 2003-153814 (JP), filed on May 30, 2003.
Prior Publication US 2007/0028801 A1, Feb. 08, 2007
Int. Cl. C08B 1/00 (2006.01)

U.S. Cl. 536—56 [106/163.01; 106/203.2; 127/29; 127/37]

6 Claims

1. A cellulose powder, having;

an average polymerization degree of 150 to 450; an average particle size of 30 to 250 μm;

an apparent specific volume of more than 7 cm³/g; and

a retention capacity for polyethylene glycol with a molecular weight of 400 of 190% or more as calculated by the following formula:

(weight of polyethylene glycol 400 absorbed)×100/(weight of the cellulose powder).