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

A polyurethane and polyetherester technology, applied in the field of polyurethane synthesis, can solve the problems of complex process, difficult to achieve controllable degradation, poor histocompatibility, etc., and achieve the effects of good biocompatibility and controllable degradation rate

Active Publication Date: 2019-05-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has a phenomenon of local acid accumulation, resulting in poor tissue compatibility, while the latter is only a physical blend of two diols, and it is difficult to achieve the purpose of controlled degradation
Recently, there are also studies on the use of polyester diols to open ring-opening epoxy monomers to prepare polyether ester block polymers as soft segments. This method is still difficult to achieve the purpose of controlling the degradation rate, and the process is complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. First heat the Schlenk bottle with the magnet and vacuumize it, replace the nitrogen back and forth three times, and remove the water and air. Add 1,5-dioxepan-2-one (DXO) (5.8g, 50mmol), ethylene glycol (EG) (155mg, 2.5mmol), 10ml THF quickly under nitrogen, "refrigerated vacuum - Thaw" three times. Put the reaction system in an oil bath at 25°C, and then add the catalyst Sn(Oct) under nitrogen 2 , the reaction system rapidly changed from colorless to yellow. After 6 hours of reaction, a small amount of hydrochloric acid / methanol mixed solvent was added to terminate the reaction, and the system turned from yellow to colorless. The polymer was then dissolved in dichloromethane, and excess ether was used as a precipitating agent, and vacuum-dried at room temperature to synthesize poly-1,5-dioxepan-2-one polyether ester diol (PDXO).

[0026] 2. Weigh PDXO (1.16g, 10mmol) and add it to a three-necked flask, dehydrate it under vacuum at 120°C for 25min, add TDI (0.44g...

Embodiment 2

[0029] The difference from Step 1 in Example 1 is that: the reaction temperature is 40°C, the reaction time is 4h, and the polyether ester polyurethane is obtained, which is marked as A2. It is found through characterization that the end of PDXO has a double bond, which shows that increasing the temperature has a great influence on the preparation of PDXO precursor. Polymers are not good.

Embodiment 3

[0031] The difference from step 1 in Example 1 is that the reaction time is 12 hours, and the polyether ester polyurethane is prepared, which is marked as A3. It is found through characterization that the molecular weight of the prepared PDXO does not increase much, indicating that it is enough to prepare the PDXO precursor in 6 hours.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/10C08G18/42C08G18/32
Inventor 陈扬肖文昊雷彩红许进宝
Owner GUANGDONG UNIV OF TECH
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