Patent ID: 7939101
Filing Date: 2011-05-10
Classification: A61K,C08B,Y10T

Abstract:
1. A cellulose powder having an average polymerization degree of 150-450, an average L/D value of particles of 2.0-4.5 for 75 μm or less, an average particle size of 20-105 μm, an apparent specific volume of 4.0-7.0 cm 3 /g, an apparent tapping specific volume of 2.4-4.5 cm 3 /g, an angle of repose of 52° or less, and a specific surface area of 85 m 2 /g or more as measured by water vapor adsorption, wherein the average polymerization degree of said powder is 5 to 300 higher than the level-off polymerization degree for said cellulose powder, said level-off polymerization degree being measured by a viscosity method after hydrolysis of the cellulose powder in boiling 2.5N hydrochloric acid for 15 minutes, wherein the breaking load of tablets obtained by compressing 0.5 g of the cellulose powder at 20 MPa is 190 N or more and the disintegration time of the tablets is 130 seconds or less.