US 11,912,839 B2
Hot melt film containing biomass-based thermoplastic polyurethane resin
Heedae Park, Busan (KR)
Assigned to SAM BU FINE CHEMICAL CO., LTD., Gimhae-si (KR)
Filed by SAM BU FINE CHEMICAL CO., LTD., Gimhae-si (KR)
Filed on Nov. 25, 2022, as Appl. No. 17/994,272.
Claims priority of application No. 10-2021-0166594 (KR), filed on Nov. 29, 2021.
Prior Publication US 2023/0167253 A1, Jun. 1, 2023
Int. Cl. C08G 18/72 (2006.01); C08J 5/18 (2006.01); C08K 3/36 (2006.01)
CPC C08J 5/18 (2013.01) [C08G 18/72 (2013.01); C08K 3/36 (2013.01); C08J 2375/08 (2013.01); C08K 2201/011 (2013.01)] 5 Claims
 
1. A hot melt film containing thermoplastic polyurethane (TPU) resin, which includes biomass based TPU resin, comprising:
wherein the thermoplastic polyurethane resin composition comprises 20 to 70% by weight of a biomass-based TPU resin produced by reacting a biomass-derived polyol with a diol-based chain extender and diisocyanate, and a hydrophobic nano-silica organically treated on the surface of nano-silica particles having a size in a range of 1 to 100 nm in a range of 0.1 to 5 parts per hundred resin (phr),
wherein the hydrophobic nano-silica is formed in a nano-silica aggregate state having a uniform aggregate size of 100 to 1200 nm on average,
wherein the thermoplastic polyurethane resin composition is formed into a film with a thickness in a range of 0.02-0.3 mm.