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Preparation method of waterborne anionic closed polyisocyanate cross-linking agent

A polyisocyanate and anion technology, which is applied in the field of preparation of water-based anion-blocked polyisocyanate crosslinking agents, can solve the problems of low activity and poor practical effect, and achieves good environmental performance, easy to master and stable production technology and production process. good effect

Inactive Publication Date: 2017-01-11
JIANGSU CALE NEW MATERIALS
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  • Abstract
  • Description
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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide a preparation method of water-based anion-blocked polyisocyanate crosslinking agent to solve the problems of low activity and poor practical effect in the prior art.

Method used

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  • Preparation method of waterborne anionic closed polyisocyanate cross-linking agent

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Embodiment 1

[0030] Such as figure 1 The preparation process of the shown water-based anion-blocked polyisocyanate crosslinking agent comprises the following steps;

[0031] The first step is to prepare the prepolymer. Under the protection of dry nitrogen and the temperature is 80°C, mix TDI and trimethylolpropane through acetone and fully react for 1.5 hours, and during the mixing and reaction process, the mixture Stir at a constant speed in a clockwise direction, and the stirring speed is 500 revolutions per minute. After the reaction is completed, the temperature of the mixture is naturally cooled to room temperature and allowed to stand for 15 minutes to obtain a prepolymer, wherein the weight ratio of TDI to methylpropane is 5:1;

[0032] The second step is to prepare the reaction solution. Heat the prepolymer prepared in the first step to 60°C within 3 minutes, and then carry out the uniform stirring operation on the prepolymer in the same direction as the first step, and the stirrin...

Embodiment 2

[0036] Such as figure 1 The preparation process of the shown water-based anion-blocked polyisocyanate crosslinking agent comprises the following steps;

[0037] The first step is to prepare the prepolymer. Under the protection of dry nitrogen and the temperature is 60°C, mix TDI and trimethylolpropane through acetone and fully react for 1 hour, and during the mixing and reaction process, the mixture Stir at a constant speed in a clockwise direction, and the stirring speed is 400 revolutions per minute. After the reaction is completed, the temperature of the mixture is naturally cooled to room temperature and allowed to stand for 10 minutes to obtain a prepolymer, wherein the weight ratio of TDI to methylpropane is 8:1;

[0038] The second step is to prepare the reaction solution. Heat the prepolymer prepared in the first step to 50°C within 3 minutes, and then carry out the uniform stirring operation on the prepolymer in the same direction as the first step, and the stirring s...

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Abstract

The invention discloses a preparation method of a waterborne anionic closed polyisocyanate cross-linking agent. The preparation method includes the steps of preparation of a prepolymer, preparation of reaction liquid, closing work and other operation. Compared with the prior art, the synthetic process is simple and standard, the production process and the production flow are easy to grasp, the prepared product is reliable in performance and good in stability, production experience summarization and accumulation are convenient, and production raw materials are good in environmental protection performance; meanwhile, the raw material reaction efficiency and the grasping and adjusting capacity of the reaction process are effectively improved, side effects generated by the cross-linking agent and water can be relieved, the activity of the cross-linking agent can be improved, and therefore the purpose of improving the material interfacial strength is achieved.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of an aqueous anion-blocked polyisocyanate crosslinking agent. Background technique [0002] The development and application of isocyanate technology has a long history, and it has been widely used in many industries. However, due to the late start in the development and application of water-based isocyanate material technology in China, the production of water-based isocyanate materials currently used The preparation process is the traditional preparation process. Although the traditional preparation process can meet the needs of production on the one hand, and has the advantages of mature technology on the other hand, when the water-based isocyanate material is produced by the traditional preparation process, there is often this production problem. The process is relatively complicated, difficult to master and not conducive to the summary ...

Claims

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Application Information

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IPC IPC(8): C08G18/80C08G18/32
CPCC08G18/8012C08G18/3206C08G18/8035
Inventor 赵刚沈健
Owner JIANGSU CALE NEW MATERIALS
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