Non-isocyanate polyurethane and preparation method thereof

A non-isocyanate, polyurethane technology, applied in the field of non-isocyanate polyurethane and its preparation, can solve the problems of affecting the health of users, affecting the functionality of the final product, and being unfriendly to operators, achieving stable reaction, excellent mechanical properties, and improved safety. sexual effect

Active Publication Date: 2021-02-23
福建华夏蓝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong volatility and high toxicity of alkyl aziridine small molecules, it is not friendly to operators, and the prepared compound containing carbamate structure may also contain a certain amount of highly toxic monomers, which will affect the safety of subsequent users. Healthy body
At the same time, small molecules of aziridine are prone to self-polymerization under reaction conditions, which affects the functionality of the final product

Method used

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  • Non-isocyanate polyurethane and preparation method thereof
  • Non-isocyanate polyurethane and preparation method thereof
  • Non-isocyanate polyurethane and preparation method thereof

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preparation example Construction

[0013] The invention provides a kind of preparation method of non-isocyanate polyurethane, comprises the following steps:

[0014] Step 1. Mix trifunctional aziridine polymer, double-terminated allyl compound, macroporous cation exchange resin and catalyst, feed carbon dioxide under vacuum, then raise the temperature to 65-85°C, react for 2-5 hours and then cool down to 30-40°C to obtain the first reactant;

[0015] The macroporous cation exchange resin is a hydrogen-type macroporous cation exchange resin containing hydrogen ions;

[0016] Step 2. Add a difunctional aziridine polymer, a double-ended allyl compound, 2,3-epoxysuccinic acid and a solvent to the first reactant in step 1, feed carbon dioxide under vacuum conditions, and heat up to 70-95°C, react for 2-5h and then cool down to 30-40°C to obtain the second reactant;

[0017] Step 3. Filter the macroporous cation exchange resin in the second reactant obtained in step 2, then adjust the pH of the system to 7-9, add w...

Embodiment 1

[0041] The preparation method of non-isocyanate polyurethane specifically comprises the following steps:

[0042] Step 1, 1mol trimethylolpropane-tris[3-(2-methylaziridinyl)]propionate, 3mol double-ended allyl polyoxyethylene ether-20, 0.27mol hydrogen ion-containing NRW160 and 0.01mol[BMIM]Br were added into the high-pressure reactor lined with tetrafluoroethylene membrane through the feed valve, the high-pressure reactor was sealed, the feed valve, discharge valve, and inlet valve were closed, and the outlet valve was opened to vacuum Suction filter to remove the air in the reactor; close the outlet valve, open the inlet valve, charge 14mol carbon dioxide, close the inlet valve, heat up to 65°C, cool down to 30°C after 5 hours of reaction, open the outlet valve, and release the remaining carbon dioxide , to obtain the first reactant;

[0043] Step 2, open the feed valve, quickly add 8mol 3,3-dimethylolpentane-bis[3-(2-methylaziridinyl)]propionate, 8mol double-ended allyl po...

Embodiment 2

[0046] The preparation method of non-isocyanate polyurethane specifically comprises the following steps:

[0047] Step 1, 1mol trimethylolpropane-tris[3-(2-ethylaziridinyl)] propionate, 3mol double-ended allyl polyoxyethylene ether-45, containing 0.19mol hydrogen ion NRW160 and 0.04mol[BMIM]I are added into the high-pressure reactor lined with tetrafluoroethylene membrane through the feed valve, the high-pressure reactor is sealed, the feed valve, discharge valve, and inlet valve are closed, the outlet valve is opened, and the vacuum Remove the air in the reactor by suction filtration; close the outlet valve, open the inlet valve, charge 10mol carbon dioxide, close the inlet valve, raise the temperature to 85°C, cool down to 35°C after 2 hours of reaction, open the outlet valve, and release the remaining carbon dioxide , to obtain the first reactant;

[0048] Step 2, open the feed valve, quickly add 18mol 3,3-dimethylolpentane-bis[3-(2-methylaziridinyl)]propionate, 18mol dou...

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Abstract

The invention discloses non-isocyanate polyurethane and a preparation method thereof, and belongs to the technical field of adhesives, and the preparation method comprises the following steps: mixinga trifunctional aziridine polymer, a double-terminal allyl compound, hydrogen type macroporous cation exchange resin containing hydrogen ions and a catalyst, and introducing CO2 for reaction under a vacuum condition; adding a difunctional aziridine polymer, a double-terminal allyl compound, 2, 3-epoxysuccinic acid and a solvent, and introducing CO2 under a vacuum condition to react; and filteringthe macroporous cation exchange resin, distilling the solvent, and adjusting the solid content to obtain the non-isocyanate polyurethane. According to the preparation method, isocyanate is not used inpolyurethane preparation, CO2 and an aziridine polymer are used as raw materials for reaction synthesis of polyurethane, CO2 is non-toxic, rich in resource and low in price, the aziridine polymer islow in volatility and friendly to operators and the environment in the production process, and the preparation method is a safe and environment-friendly production mode, the polyurethane prepared by the preparation method is excellent in performance and can replace the existing isocyanate polyurethane.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a non-isocyanate polyurethane and a preparation method thereof. Background technique [0002] Polyurethane is a class of polymers containing more carbamate functional groups on the main chain of macromolecules, and is one of the most widely used polymers so far. In industry, polyurethane is generally produced by the reaction of isocyanate, polyol and other functional monomers under the action of a catalyst. Due to the diversification of raw materials and the adjustable molecular structure, different polyurethane materials from soft to hard can be prepared according to their own needs. Conventional polyurethane synthesis methods use isocyanate monomers. Isocyanate monomers are usually synthesized by the phosgene method. Phosgene is a highly toxic gas that seriously pollutes the environment. At the same time, due to the strong volatility of the isocyanate monomer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G71/04C09J175/04
CPCC08G71/04C09J175/04Y02P20/141
Inventor 邱元进饶长贵陈国栋
Owner 福建华夏蓝新材料科技有限公司
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