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 |
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,
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.
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