	US 12,460,058 B1
	High-transparency, low temperature processable cellulose acetate film and method for preparing the same
Huimin Hou, Shanghai (CN); Chunping Yuan, Shanghai (CN); Song Wang, Shanghai (CN); Jihu Wang, Shanghai (CN); Yamei Miao, Shanghai (CN); Hongmei Zhang, Shanghai (CN); and Cuicui Guo, Shanghai (CN)
Assigned to SHANGHAI UNIVERSITY OF ENGINEERING SCIENCE, Shanghai (CN)
Filed by SHANGHAI UNIVERSITY OF ENGINEERING SCIENCE, Shanghai (CN)
Filed on Apr. 3, 2025, as Appl. No. 19/169,052.
Application 19/169,052 is a continuation of application No. PCT/CN2023/102476, filed on Jun. 26, 2023.
Int. Cl. C08J 5/18 (2006.01); C08K 3/26 (2006.01); C08K 3/34 (2006.01); C08K 5/23 (2006.01)

CPC C08J 5/18 (2013.01) [C08K 3/26 (2013.01); C08K 3/346 (2013.01); C08K 5/235 (2013.01); C08J 2301/12 (2013.01); C08J 2467/00 (2013.01); C08K 2003/265 (2013.01)]

4 Claims

1. A cellulose acetate film, characterized in that, by weight, the raw material composition comprises:

75-85 parts by weight of modified cellulose acetate;

12-20 parts by weight of plasticizer; and

2-6 parts by weight of transparency agent;

wherein the modified cellulose acetate is modified by glycerol and theanine using a method comprising:

dissolving cellulose acetate in N,N-dimethylformamide or acetone;

adding glycerol;

reacting at 120-130° C. for 4-6 hours, then

reacting under alkaline conditions at 160-180° C. for 5-10 hours, with a glycerol polymerization degree of 8-12;

adjusting the pH to neutral;

adding theanine and reacting at 105-135° C. for 4-8 hours; and

drying to obtain the modified cellulose acetate.