Polyether ester polyurethane, method for preparing same and application of polyether ester polyurethane

Abstract

The invention belongs to the technical field of polyurethane synthesis, and discloses polyether ester polyurethane, a method for preparing the same and application of the polyether ester polyurethane.The method includes adding initiators and catalysts I into 1,5-di-oxacycloheptane-2-ketone to obtain mixtures, carrying out reaction on the mixtures in solvents I at the temperature of 20-60 DEG C and synthesizing poly-1,5-di-oxacycloheptane-2-ketone polyether ester diol; adding the poly-1,5-di-oxacycloheptane-2-ketone polyether ester diol into diisocyanate and solvents II to obtain mixtures, heating the mixtures until the temperatures of the mixtures reach 60-100 DEG C, adding catalysts II into the mixtures, carrying out reaction to obtain prepolymers, then adding chain extenders into the prepolymers, carrying out reaction, and cooling mixed systems until the temperatures of the mixed systems reach the room temperature so as to obtain the polyether ester polyurethane. The1,5-di-oxacycloheptane-2-ketone is used as a monomer for the polyether ester polyurethane. The polyether ester polyurethane, the method and the application have the advantages that the polyether ester polyurethane isgood in biocompatibility, is amorphous and can be used for degrading polyurethane elastomers, and the degradation rate can be controlled.

Description

technical field

[0001] The invention belongs to the technical field of polyurethane synthesis, and more specifically relates to a polyether ester polyurethane and its preparation method and application. Background technique

[0002] Polyurethane is a general term for a class of polymers whose main chain is urethane. Polyurethane elastomer (PUE) is a polymer synthetic material between plastics and rubber. Due to the incompatibility of soft and hard segments in polyurethane elastomers, there is phase separation; at the same time, there are inter-chain and intra-chain hydrogen bonds in the urethane structure, which endows it with unique properties, such as good wear resistance and mechanical strength And, low temperature resistance, ozone aging resistance and other properties. PUE has a large degree of freedom in molecular design, and many different physical properties can be endowed through molecular design, while avoiding the realization of additives and other means, so it h...