US 11,673,991 B2
High stress thermal plastic polyurethane, its preparing formulation and making process
Chien-Hsin Wu, Taipei (TW); Ying-Chi Huang, Taipei (TW); Sheng-hong A. Dai, Taipei (TW); and Ru-Jong Jeng, Taipei (TW)
Assigned to CHANDA CHEMICAL CORP., Taipei (TW)
Filed by CHANDA CHEMICAL CORP., Taipei (TW)
Filed on Jun. 29, 2022, as Appl. No. 17/852,661.
Application 17/852,661 is a continuation of application No. 16/735,041, filed on Jan. 6, 2020, abandoned.
Claims priority of application No. 108145800 (TW), filed on Dec. 13, 2019.
Prior Publication US 2022/0325029 A1, Oct. 13, 2022
Int. Cl. C08G 18/64 (2006.01); C08G 18/10 (2006.01); C08G 18/32 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/75 (2006.01); C08G 18/76 (2006.01); C08G 18/40 (2006.01); C08G 18/44 (2006.01); C08G 18/61 (2006.01); C08G 18/73 (2006.01)
CPC C08G 18/6469 (2013.01) [C08G 18/10 (2013.01); C08G 18/3206 (2013.01); C08G 18/4277 (2013.01); C08G 18/4825 (2013.01); C08G 18/4833 (2013.01); C08G 18/4854 (2013.01); C08G 18/755 (2013.01); C08G 18/7671 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A formulation for preparing thermal plastic polyurethane with a stress more than 2.5 MPa, comprising a polyurethane oligomer and a chain extender; wherein the polyurethane oligomer is formed by reacting a polycarbonate derivative having a structure as shown in formula (1) with a diisocyanate,

OG Complex Work Unit Chemistry
wherein the polycarbonate derivative with R1 is derived from a polyether diamine having a weight-average molecular weight between 100 and 5,000 Da, and m is an integer of 1-5; the diisocyanate is an aromatic diisocyanate; and
wherein the chain extender is a polyether diol, and a weight ratio of the polyether diol to the polyurethane oligomer is 1-3; or
wherein the polycarbonate derivative with R1 is derived from an amino compound containing siloxane groups, and m is an integer of 1-5; the diisocyanate is an aliphatic diisocyanate; and wherein the chain extender is an aliphatic diol, and a weight ratio of the aliphatic diol to the polyurethane oligomer is 0.2-0.8.