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Preparation method of water-based nonionic isocyanate crosslinking agent

An isocyanate and non-ionic technology, applied in the field of preparation of water-based non-ionic isocyanate crosslinking agent, can solve the problems of low production efficiency and complicated preparation process, and achieve the effects of reliable product performance, good stability, improved efficiency and product quality

Inactive Publication Date: 2017-01-25
JIANGSU CALE NEW MATERIALS
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  • Abstract
  • Description
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  • Application Information

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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 a water-based nonionic isocyanate crosslinking agent to solve the problems of complex preparation process and low production efficiency in the prior art

Method used

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  • Preparation method of water-based nonionic isocyanate crosslinking agent

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Effect test

Embodiment 1

[0024] Such as figure 1 The preparation method of shown aqueous nonionic isocyanate crosslinking agent comprises the following steps;

[0025] The first step is pre-polymerization treatment. Under the protection of dry nitrogen and the temperature is 20°C-40°C, isocyanate and azobisisobutyronitrile are sequentially added to the organic solvent N-methylpyrrolidone, and the Stir clockwise at a constant speed for 2 hours, and the stirring speed is 2000 rpm. After the stirring is completed, the solution is left to stand for 5 minutes, and then the temperature of the solution is raised to 85 ° C in 5 minutes, and then ethylene glycol and polyether are added to the solution. During the process of adding ethylene glycol and polyether, the mixed solution was stirred clockwise at a constant speed for 1 hour, and the stirring speed was 800 revolutions per minute. After the addition was completed, the stirring speed and temperature were kept for 1 hour, and then the mixed solution was ke...

Embodiment 2

[0031] Such as figure 1 The preparation method of shown aqueous nonionic isocyanate crosslinking agent comprises the following steps;

[0032] The first step is pre-polymerization treatment. Under the protection of dry nitrogen and the temperature is 20°C-40°C, isocyanate and azobisisobutyronitrile are sequentially added to the organic solvent N-methylpyrrolidone, and the Stir clockwise at a constant speed for 4 hours, and the stirring speed is 1500 rpm. After the stirring is completed, the solution is left to stand for 3 minutes, and then the temperature of the solution is raised to 90 ° C in 8 minutes, and then ethylene glycol and polyether are added to the solution. During the process of adding ethylene glycol and polyether, the mixed solution was stirred counterclockwise at a constant speed for 1 hour, and the stirring speed was 700 rpm. 3:1 weight ratio to catalyst, 3:1 weight ratio to isocyanate to glycol and polyether;

[0033]In the second step, polymerization treatm...

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Abstract

The invention provides a preparation method of a water-based nonionic isocyanate crosslinking agent. The preparation method includes pre-polymerization treatment, polymerization treatment, emulsifying and distillation. Compared with the prior art, the preparation method has the advantages that the method is simple and standard in synthesizing process, the production process and flow can be mastered easily, production experience can be summarized and accumulated conveniently, synthesizing efficiency and product quality are increased effectively, the comprehensive utilization rate of raw materials can be increased effectively, material loss and energy loss during production are lowered, and product quality is increased while production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a water-based nonionic isocyanate crosslinking agent. Background technique [0002] At present, with the continuous improvement of people's requirements for environmental protection, water-based isocyanate materials have been widely used in coatings and other fields, and the market demand has gradually increased. The development and application of material technology started late, so the production and preparation processes of water-based isocyanate materials currently used are all traditional preparation processes. Although the traditional preparation process can meet the needs of production on the one hand, it also has mature technology and other advantages, but when the water-based isocyanate material is produced by the traditional preparation process, the production process is often complicated, difficult to master and not conducive t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/80C08G18/32
CPCC08G18/8012C08G18/3206C08G18/48C08G18/8041C08G18/8048
Inventor 沈健
Owner JIANGSU CALE NEW MATERIALS
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