Amphoteric shape-memory polyurethane and method for preparing the same
AssigneeShenzhen University
InventorsShaojun Chen, Yan Yang, Funian Mo, Huanhuan Ren, Zaochuan Ge
Life of this patent
Estimating the term…
Abstract
A method for preparing an amphoteric shape-memory polyurethane and an amphoteric shape-memory polyurethane prepared by the method, the method including: 1) polymerizing monomer A and monomer B to synthesize a polyurethane; and 2) contacting monomer D and the polyurethane to conduct a ring-opening reaction on a nitrogen group of the polyurethane, to yield an amphoteric shape-memory polyurethane. The monomer A is a N-alkyl dialkanolamine having a formula I. The monomer B is a polyisocyanate, and the monomer D is an alkyl sulfonate.
Claims17
A method for preparing an amphoteric shape-memory polyurethane, comprising:
- 1) polymerizing monomer A and monomer B to synthesize a polyurethane;
- and
- 2) contacting monomer D and the polyurethane to conduct a ring-opening reaction on a nitrogen group of the polyurethane, to synthesize an amphoteric shape-memory polyurethane;
- wherein
- the monomer A is a N-alkyl dialkanolamine having a formula I:
- in which,
- R represents —CnHm,
- n is an integer between 1 and 18,
- m ≤2n +1,
- R′ represents CxH2x, and
- x is an integer between 1 and 5;
- the monomer B is a polyisocyanate;
- and
- the monomer D is an alkyl sultone;
- wherein in 1), following the polymerization of the monomer A and the monomer B, monomer C is added, and the monomer C is a polyhydric alcohol.
Dependencies are inferred from the claim text.