Back to results
US 2024/0174807 A1Published application
Multiblock copolymer containing polylactic acid and polyamide for toughening polylactic acid and method for preparing the same
AssigneeKorea Research Institute of Chemical Technology
InventorsJihoon SHIN, Sae Hume Park, Seungju Hong
Life of this patent
Estimating the term…
Abstract
Provided are a multiblock copolymer containing polylactide and polyamide for toughening polylactide and a method for preparing the same, wherein the multiblock copolymer containing polylactide and polyamide has an effect of overcoming the brittleness and providing a toughened polylactide-containing copolymer.
Claims13
A polyamide 11-polylactide multiblock copolymer represented by the following Formula 1:
- In Formula 1, R2 is selected from C1-C20 straight-chain or branched-chain alkylene, C3-C20 cycloalkylene, C6-C20 arylene,
- R3 is selected from C1-C20 straight-chain or branched-chain alkylene, C3-C20 cycloalkylene, or C6-C20 arylene, x is an integer of 1 to 200, y and z are the same as or different from each other and integers of 1 to 500, and n is an integer or a prime number of 1 to 10.
A method for preparing a polyamide 11-polylactide multiblock copolymer comprising:
- (a) preparing polyamide 11 [NH2-PA11-NH2] having a diamine end group;
- (b) preparing hydroxyl telechelic polylactide-polyamide 11-polylactide [OH-PLA-PA11-PLA-OH] by adding lactide to the polyamide 11 [NH2-PA11-NH2] having the diamine end group and performing ring-opening polymerization;
- and
- (c) preparing a polyamide 11-polylactide multiblock copolymer [(PA11-PLA)n, wherein n is an integer or prime number of 1 to 10] by adding diisocyanate to the hydroxyl telechelic polylactide-polyamide 11-polylactide [OH-PLA-PA11-PLA-OH] and forming a urethane bond.
1 more element
Dependencies are inferred from the claim text.