US 12,338,319 B2
Resin composition, nonwoven fabric and film of biodegradable polyester, and preparation method thereof
Kyung Youn Kim, Gyeonggi-do (KR); Hyung Mo Kim, Gyeonggi-do (KR); Seong Dong Kim, Gyeonggi-do (KR); and Hoon Kim, Gyeonggi-do (KR)
Assigned to SK leaveo Co., Ltd., Gyeonggi-do (KR)
Filed by SK leaveo Co., Ltd., Gyeonggi-do (KR)
Filed on May 21, 2021, as Appl. No. 17/326,489.
Claims priority of application No. 10-2020-0064391 (KR), filed on May 28, 2020; application No. 10-2020-0064393 (KR), filed on May 28, 2020; application No. 10-2020-0077305 (KR), filed on Jun. 24, 2020; application No. 10-2020-0095851 (KR), filed on Jul. 31, 2020; and application No. 10-2020-0149832 (KR), filed on Nov. 11, 2020.
Prior Publication US 2021/0380757 A1, Dec. 9, 2021
Int. Cl. C08G 63/181 (2006.01); C08J 5/18 (2006.01); C08L 67/02 (2006.01); D01D 5/08 (2006.01)
CPC C08G 63/181 (2013.01) [C08J 5/18 (2013.01); C08L 67/02 (2013.01); C08J 2367/02 (2013.01); C08J 2401/02 (2013.01); D01D 5/08 (2013.01); D10B 2331/04 (2013.01); D10B 2401/12 (2013.01)] 11 Claims
 
1. A biodegradable polyester resin composition, which comprises a diol component comprising 1,4-butanediol, a dicarboxylic acid component, and nanocellulose in an amount of 0.001% by weight to 0.2% by weight based on the total weight of the biodegradable polyester resin composition,
wherein the dicarboxylic acid component comprises a first dicarboxylic acid and a second dicarboxylic acid different from the first dicarboxylic acid,
wherein the first dicarboxylic acid comprises one or more selected from the group consisting of terephthalic acid, and dimethyl terephthalic acid,
wherein the second dicarboxylic acid comprises one or more selected from the group consisting of adipic acid, and succinic acid,
wherein the molar ratio of the diol component and the dicarboxylic acid component is 1 to 2:1,
wherein the molar ratio of the first dicarboxylic acid and the second dicarboxylic acid is 0.5 to 2:1,
wherein the biodegradability of the biodegradable polyester resin composition is 85% or more, and
wherein the nanocellulose is dispersed in the diol component.