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Nano-modified flame-retardant phenolic injection molding compound and its preparation method

A nano-modification and injection molding technology, which is applied in the field of phenolic injection molding, can solve the problems of injection molding performance impact, high production cost, and application field limitations, and achieve the effects of improved dispersion performance, outstanding flame retardant effect, and low pollution

Active Publication Date: 2017-09-26
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, due to the existence of clay, the loss of production equipment is large, and the organic clay itself requires a certain cost, and the price of this type of material may not be competitive.
In addition, its injection molding performance will be affected due to the addition of organoclay
[0007] U.S. Patent 6664343B2 discloses a preparation method of a phenolic composite material, its main component is more than 70% thermoplastic phenolic plastics, plus a certain amount of silicone rubber components and curing agent, its curing speed is fast, moisture-proof performance is good, However, due to the large amount of silicone rubber and phenolic resin used as raw materials, the production cost is relatively high, and the application field is limited.

Method used

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  • Nano-modified flame-retardant phenolic injection molding compound and its preparation method
  • Nano-modified flame-retardant phenolic injection molding compound and its preparation method
  • Nano-modified flame-retardant phenolic injection molding compound and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Slowly add 0.2mol / L magnesium nitrate and 0.1mol / L aluminum nitrate mixed solution (100ml) dropwise into 500mL sodium dodecylbenzenesulfonate solution with a concentration of 0.1mol / L at room temperature, and keep the pH of the system at 9-11, aging at 60°C for 20 hours after the dropwise addition, filtering and washing, the obtained white powder is the nano-modified magnesium-aluminum composite flame retardant. The reaction yield was 92%.

[0042] figure 1 The X-ray diffraction pattern of the nano-modified magnesium-aluminum composite flame retardant prepared for this example, it can be seen from the figure that the first-order diffraction peak (003) appears at 3.10°, and the corresponding layer spacing is 2.84nm, which is indeed Modifiers at the nanoscale.

[0043] figure 2 Schematic diagram of the structure of the nano-modified magnesium-aluminum composite flame retardant prepared for this example. The intercalation agent between the sheets is mainly sodium dodec...

Embodiment 2

[0049] Slowly add 0.1mol / L magnesium nitrate and 0.05mol / L aluminum nitrate mixed solution (50ml) dropwise into 500mL sodium dodecylbenzenesulfonate solution with a concentration of 0.05mol / L at room temperature to keep the pH of the system at 9-11, aging at 80°C for 15 hours after the dropwise addition, filtering and washing, the obtained white powder is the nano-modified magnesium-aluminum composite flame retardant. The reaction yield was 95%.

[0050] 20 grams of the nano-modified magnesium-aluminum composite flame retardant prepared in this implementation and 180 grams of thermoplastic phenolic resin (PF8062 thermoplastic phenolic resin of Zhejiang Jiamin Plastic Co., Ltd.) were melt-blended on a three-roller machine (drum temperature 90-120° C. ), fully mixed for 30 minutes to make nano-modified flame-retardant thermoplastic phenolic resin B.

[0051] Mix each component according to the weight percentage in Table 2, roll on a double-roller mill, and then pulverize to obt...

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Abstract

The invention discloses a nano-modified flame-retardant phenolic injection molding compound. The raw materials are composed of: 50-80% of nano-modified flame-retardant thermoplastic phenolic resin; 5-30% of wood powder; 5-30% of filler 1-2% release agent; 0.5-1.5% colorant; 5-15% curing agent; 0.5-5% co-curing agent; , Mix the soluble aluminum salt with water to obtain a mixed solution, then add the mixed solution dropwise to the aqueous solution of sodium dodecylbenzenesulfonate, and keep the pH value of the reaction system at 8-13, after the dropwise addition, age and filter Obtained; the thermoplastic phenolic resin and the nano-modified magnesium-aluminum composite flame retardant are blended and modified to prepare the nano-modified flame-retardant thermoplastic phenolic resin. The invention provides a nano-modified flame-retardant phenolic injection molding compound with long storage time and excellent insulation performance, toughness and heat resistance and flame retardancy.

Description

technical field [0001] The invention relates to the technical field of phenolic injection plastics, in particular to a nano-modified flame-retardant phenolic injection plastic and a preparation method thereof. Background technique [0002] Phenolic injection molding is a thermosetting plastic material prepared mainly from thermoplastic phenolic resin and other fillers. It has the characteristics of low price, excellent mechanical properties, good insulation performance, and easy and quick molding. It is widely used in military industry, electrical components, instruments, and buildings. and other fields. However, this type of material also has defects such as brittleness, difficult storage, limited heat resistance and flame retardancy. [0003] Most of the currently published invention patents for flame-retardant phenolic molding materials use halogen-containing flame retardants, and their preparation, use, and post-treatment processes have a greater impact on the environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L97/02C08K13/06C08K9/04C08K3/28C08K3/16C08K3/34C08K3/26C08K3/36
Inventor 范宏曹骏沈芳沈培林周大鹏俞立琼
Owner ZHEJIANG UNIV