Patent ID: 6844033
Filing Date: 2005-01-18
Classification: C08J,C08K,C08L,C09K,G02B

Abstract:
1. A cellulose ester film comprising particles in an amount of from 0.0001 to 0.3% by weight and a compound represented by the following formula (1) in an amount of 1 to 30% by weight wherein Y represents an ester bond or —R 1 C(═O)O—, —C(═O)OR 2 —, —C(═O)O—R 3 —OC(═O)— or —OC(═O)—R 4 —C(═O)O—, in which R 1 and R 2 independently represent a substituted or unsubstituted alkylene group, and R 3 and R 4 independently represent a substituted or unsubstituted alkylene group, or —(R 5 O) p R 5 —, in which R 5 represents a substituted or unsubstituted alkylene group, and p is an integer of from 1 to 3; Ra and Rb independently represent an alkyl group, RcC(═O)O— or —C(═O)ORc in which Rc represents a substituted or unsubstituted phenyl group or a substituted or unsubstituted cyclohexyl group; and m and n independently represent an integer of from 0 to 5, provided that when m or n is not less than 2, plural Ras or Rbs may be the same or different; and wherein the cellulose ester film has a thickness of from 10 to 60 μm, a moisture vapor transmittance of from 20 to 200 g/m 2 ·24 hr, and a rate of weight change falling within the range of ±2% in which the rate is represented by the ratio of the difference between the film weights before and after storage at 80° C. and 90% RH for 48 hours to the film weight before the storage.