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Hyperbranched polyamide for high-temperature nylon processing as well as preparation method and application thereof

A technology of hyperbranched polyamide and nylon, which is applied in the field of hyperbranched polyamide for high temperature nylon processing and its preparation, can solve the problem of difficulty in preparing nylon-glass fiber composite materials, cannot solve high temperature resistant nylon processing, and affects the mechanical properties of composite materials, etc. problems, to achieve the effect of unaffected mechanical properties, significantly improved fluidity, and easy industrial production

Active Publication Date: 2020-07-03
WUHAN HYPERBRANCHED POLYMER RESINS SCI& TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mechanical strength of high-temperature nylon cannot meet the strength requirements of engineering plastics sometimes. It is often necessary to add fillers, mainly glass fiber. However, the polarity and density difference between fillers and nylon are large, resulting in poor compatibility and difficult to obtain high filling capacity. , high-strength nylon-glass fiber composite materials, so it is generally necessary to add additives, the key is high temperature resistant flow additives and key energy-saving processing technology, conventional flow modifiers such as stearic acid, EBS, wax, silicone And other materials can improve the effective lubrication of nylon-glass fiber composite materials, improve fluidity and melt index
However, stearic acid, EBS and wax have low thermal decomposition temperature, high volatility during processing, serious pollution, and affect the mechanical properties of composite materials; silicone does not improve fluidity enough, and it is difficult to prepare high glass fiber content (≥50wt %) of nylon-glass fiber composite
The synthesis and processing technology of high temperature resistant flow aids has become the key to the development of nylon and composite materials. The applicant once invented hyperbranched polyester flow aids (patent application number: 201611044769.9), which solved the problem of high efficiency of nylon 6 and its composite materials. Processing, but still can not solve the processing of high temperature resistant nylon (such as nylon 66, etc.) and composite materials

Method used

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  • Hyperbranched polyamide for high-temperature nylon processing as well as preparation method and application thereof
  • Hyperbranched polyamide for high-temperature nylon processing as well as preparation method and application thereof
  • Hyperbranched polyamide for high-temperature nylon processing as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 A kind of hyperbranched polyamide for high temperature nylon processing, the preparation method is as follows:

[0037] 1.35mol citric acid, 1.0mol hexamethylenediamine, 0.5mol 5-aminovaleric acid, 2.32g methylbenzenesulfonic acid, 300g toluene, 48g dioxane were added to the In a four-necked flask with a thermometer, heat it to 110°C under nitrogen protection, and stir and react at 110°C for 20 hours. At this time, the water separator is anhydrous, and the water-carrying agent toluene and dioxane are removed in a vacuum while it is hot. Take out, After cooling, a hyperbranched polyamide (referred to as HBP-1) is obtained, and its number-average molecular weight is 1300 g / mol as measured by GPC.

[0038] Mix 2.0g of HBP-1, 500g of nylon-66, and 510g of glass fiber evenly, process and granulate through a screw extruder at 280°C to obtain a high-performance nylon 66-glass fiber composite material with a smooth surface, and the performance of the composite mate...

Embodiment 2

[0039] Embodiment 2 A kind of hyperbranched polyamide for high temperature nylon processing, the preparation method is as follows:

[0040] 1.0mol of trimesic acid, 1.02mol of 1,7-heptanediamine, 0.3mol of δ-valerolactam, 6.63g of phosphoric acid (a liquid with a concentration of 85wt%) and 663g of xylene were added to a condenser, agitator, In the four-necked flask with water separator and thermometer, heat to 150°C under nitrogen protection condition, and stir and react at 150°C for 10 hours. After cooling, a hyperbranched polyamide (referred to as HBP-2) is obtained, and its number-average molecular weight is 15000 g / mol as measured by GPC.

[0041] Mix 20.0g of HBP-2, 500g of nylon-66, and 520g of glass fiber evenly, process and granulate through a screw extruder at 280°C to obtain a high-performance nylon 66-glass fiber composite material with a smooth surface, and the performance of the composite material As shown in Table 1.

Embodiment 3

[0042] Embodiment 3 A kind of hyperbranched polyamide for high temperature nylon processing, the preparation method is as follows:

[0043]Add 1.0mol trimellitic acid, 1.02mol 4,4'-diaminodiphenylmethane, 0.3mol enantholactam, 6.05g tetra-n-butyl titanate, 500g xylene, and 105g dimethylformamide into the container In a four-necked flask with a condenser, agitator, water separator and thermometer, heat to 140°C under nitrogen protection, and stir and react at 140°C for 15 hours. At this time, no water is formed in the water separator. Aqueous xylene was taken out and cooled to obtain a hyperbranched polyamide (referred to as HBP-3), and its number average molecular weight was 19000 g / mol as measured by GPC.

[0044] Mix 10.0g of HBP-3, 500g of nylon-66, and 510g of glass fiber evenly, process and granulate through a screw extruder at 280°C to obtain a high-performance nylon 66-glass fiber composite material with a smooth surface, and the performance of the composite material A...

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Abstract

The invention belongs to the technical field of hyperbranched polymers, and particularly discloses hyperbranched polyamide for high-temperature nylon processing as well as a preparation method and application thereof. The hyperbranched polyamide is prepared by uniformly mixing tricarboxylic acid, amino carboxylic acid or cyclic amide, diamine, a reaction catalyst and a water-carrying agent and reacting, wherein the molecular weight of the hyperbranched polyamide is about 1300-19000 g / mol. When the hyperbranched polyamide is applied to processing of high-temperature nylon and composite materials, the melt index (fluidity) can be increased by 0.5-2.0 times. The process is simple, and the product has the effects of improving the flowability, reducing the processing temperature and improving the compatibility between nylon and a filler and the content of the filler, and is expected to be applied to the fields of preparation of high-performance nylon and composite materials, related fieldsand the like.

Description

technical field [0001] The invention relates to the technical field of hyperbranched polymers and preparation methods thereof, in particular to a hyperbranched polyamide for high-temperature nylon processing and its preparation method and application. Background technique [0002] High-temperature nylon generally refers to nylon with relatively high molecular weight, high mechanical strength, high melt viscosity and high processing temperature, such as nylon 66, nylon 6T, nylon 9T, nylon 10T and so on. The mechanical strength of high-temperature nylon cannot meet the strength requirements of engineering plastics sometimes. It is often necessary to add fillers, mainly glass fiber. However, the polarity and density difference between fillers and nylon are large, resulting in poor compatibility and difficult to obtain high filling capacity. , high-strength nylon-glass fiber composite materials, so it is generally necessary to add additives, the key is high temperature resistant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/36C08G69/40C08L77/06C08L77/00C08K7/14
CPCC08G69/36C08G69/40C08L77/06C08L2201/08C08L2205/02C08L77/00C08K7/14
Inventor 陈苏芳赵桂张道洪何浏炜张俊珩李登锋姜其斌
Owner WUHAN HYPERBRANCHED POLYMER RESINS SCI& TECH CO LTD
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