A kind of preparation method of neutral composite curing agent for amino molding compound

A composite curing agent and amino molding compound technology, which is applied in the field of fine chemicals, can solve the problems of difficult control of the production process, narrow range of curing agent molding, unstable product quality, etc., and achieve stable product quality, easy control, and excellent performance.

Active Publication Date: 2018-12-28
GUANGDONG RONGTAI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used single curing agent is used to increase the curing amount in order to achieve a good curing effect, but as the curing amount increases, the fluidity decreases. However, the fluidity of the curing agent will be better if the curing agent is reduced, but the curing effect is not ideal, and the molding range of the curing agent is narrow. The process is not easy to control, and the product quality is unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of amino molding compound neutral composite curing agent, the steps are as follows:

[0017] 1) Add 600g of oxalic acid solution with a mass concentration of 50% into a three-necked flask, then add 80g of phthalic anhydride and 25g of ethanol in sequence, and stir to react. Control the reaction temperature at 68°C and react for 30min;

[0018] 2) Move the reaction solution to a cold water bath with ice cubes for cooling. The cooling time is 13 minutes, and the temperature is rapidly lowered to 28° C., and ammonia water is added to the cooled reaction solution to adjust the pH of the reaction system to 7;

[0019] 3) Add 180g of emulsifier polyglycerol fatty acid ester to the neutral reaction solution, fully stir and emulsify, and the emulsification time is 40min;

[0020] 4) Add 260 g of monoethanolamine and 250 g of triethanolamine into the emulsion, stir and mix for 45 minutes to obtain the product.

Embodiment 2

[0022] The preparation method of amino molding compound neutral composite curing agent, the steps are as follows:

[0023] 1) Add 500g of oxalic acid solution with a mass concentration of 40% into a three-necked flask, then add 55g of phthalic anhydride and 15g of ethanol in sequence, and stir for reaction. Control the reaction temperature at 70°C and react for 40 minutes;

[0024] 2) Move the reaction solution to a cold water bath with ice cubes for cooling, the cooling time is 10 minutes, quickly cool down to 25°C, add ammonia water to the cooled reaction solution, and adjust the pH of the reaction system to 7;

[0025] 3) Add 150g of emulsifier lecithin to the neutral reaction solution, fully stir and emulsify, and the emulsification time is 30min;

[0026] 4) Add 170 g of monoethanolamine and 165 g of triethanolamine into the emulsion, stir and mix for 50 minutes to obtain the product.

Embodiment 3

[0028] The preparation method of amino molding compound neutral composite curing agent, the steps are as follows:

[0029] 1) Add 670g of oxalic acid solution with a mass concentration of 50% into a three-necked flask, then add 90g of phthalic anhydride and 28g of ethanol in sequence, and stir to react. Control the reaction temperature at 68°C and react for 60min;

[0030] 2) Move the reaction solution to a cold water bath with ice cubes for cooling. The cooling time is 15 minutes, and the temperature is rapidly lowered to 28° C., and ammonia water is added to the cooled reaction solution to adjust the pH of the reaction system to 7;

[0031] 3) Add 200g of emulsifier saponin to the neutral reaction solution, fully stir and emulsify, and the emulsification time is 30min;

[0032] 4) Add 170 g of monoethanolamine and 165 g of triethanolamine into the emulsion, stir and mix for 35 minutes to obtain the product.

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Abstract

The invention relates to the technical field of fine chemicals and in particular relates to a preparation method of a neutral complex curing agent of an amino molding material. The preparation method comprises the following steps: adding an oxalic acid solution into a reaction container; then adding ethanol and phthalic anhydride in sequence; stirring and reacting; rapidly cooling a reaction solution to be 25 DEG C to 28 DEG C; adding ammonia water into the reaction solution to adjust the pH (Potential of Hydrogen) of the system to be neutral; and adding emulsifier and sufficiently emulsifying; finally, adding monoethanolamine and triethanolamine; stirring and reacting to obtain a target product. According to the neutral complex curing agent prepared by the invention, a curing effect is guaranteed and a product has good flowability; a curing process is simple and easy to control; compared with a finished product prepared by utilizing a single curing agent, the product produced by the invention has stable quality and good performances; an application range of the amino molding material is expanded.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a preparation method of a neutral composite curing agent for amino molding plastics. Background technique [0002] Amino molding compound, commonly known as electric jade powder, is made by adding other fillers, release agents, curing agents, pigments, etc. to amino resin as a matrix, and undergoes a certain plasticization process. Due to the low price of raw materials, simple production process, easy environmental protection, bright color, smooth appearance, odorless and tasteless, self-extinguishing and arc resistance, heat resistance, flame retardant, low smoke, stable product size, good electrical insulation and easy Coloring and other advantages, so it is widely used in electronics, electrical appliances, automobiles, machinery, daily utensils and other industries (especially melamine plastics). [0003] The molding performance and fineness of amino molding compound ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/12C08G12/32
CPCC08G12/12C08G12/32
Inventor 黄海涛郑奋凯许伟斌
Owner GUANGDONG RONGTAI IND
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