High stress thermal plastic polyurethane, its preparing formulation and making process
AssigneeChanda Chemical Corp.
InventorsChien-Hsin Wu, Ying-Chi Huang, Sheng-hong A. Dai, Ru-Jong Jeng
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Abstract
A thermal plastic polyurethane with a stress more than 2.5 MPa, its preparing formulation and making process are disclosed. In particular, the thermal plastic polyurethane with a stress more than 2.5 MPa is prepared from a formulation comprises a polycarbonate derivative and a chain extender.
Claims20
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.
A thermal plastic polyurethane with a stress more than 2.5 MPa, being formed by reacting a polyurethane oligomer with a diol, wherein the polyurethane oligomer has a structure as shown in formula (2):
- where R1 is derived from a polyether diamine having a weight-average molecular weight between 100 and 5,000 Da, R2 is derived from an aromatic diisocyanate, m is an integer of 1-5, and x is an integer of 5-100;
- wherein the diol is a polyether diol, and a weight ratio of the polyether diol to the polyurethane oligomer is 1-3;
- or
- where R1 is derived from an amino compound containing siloxane groups, R2 is derived from a aliphatic diisocyanate, m is an integer of 1-5, and x is an integer of 5-100;
- wherein the diol is a aliphatic diol, and a weight ratio of the aliphatic diol to the polyurethane oligomer is 0.2-0.8.
Dependencies are inferred from the claim text.