Application of hyperbranched polyester in PA6 (polyamide 6)

A hyperbranched polyester and hydroxyl terminal hyperbranched technology, applied in the field of hyperbranched polyester, can solve problems such as uneven dispersion, high PA6 processing temperature, and poor PA6 fluidity, so as to reduce processing temperature, improve mechanical properties, and improve fluidity sexual effect

Inactive Publication Date: 2015-04-29
WEIHAI CY DENDRIMER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to apply hyperbranched polymers to PA6 to solve the high processing temperature of PA6 and the poor fluidity and uneven dispersion of PA6 with glass fiber added are the most important problems currently facing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dry the hydroxyl-terminated hyperbranched polyester Boltorn H20 in a vacuum oven at room temperature for 5 hours, and store it in a dry and sealed space;

[0038] (2) Put pure PA6 in a blast oven at 110°C for 6 hours, and place it in a dry and sealed space to cool to room temperature;

[0039] (3) Put the dried hydroxyl-terminated hyperbranched polyester Boltorn H20 obtained in step (1) and the dried pure PA6 obtained in step (2) in a high-speed mixer, mix for 3 minutes, and then introduce into a sealed and dry lower hopper spare;

[0040] (4) Heat the 10 temperature control zones of the twin-screw extruder to 230°C, and after preheating for 1 hour, the material is extruded and pelletized;

[0041] (5) Then dry the produced particles in a blast oven at 110°C for 6 hours to obtain PA6 / hydroxy-terminated hyperbranched polyester particles.

[0042] Among them, the mass of the hydroxyl-terminated hyperbranched polyester Boltorn H20 is 1% of the mass of pure PA6.

Embodiment 2-4

[0044] The conditions of Example 2-4 are the same as those of Example 1, with the only difference: the mass of the hydroxyl-terminated hyperbranched polyester Boltorn H20 in Example 2-4 is 2%, 5% and 10% of pure PA6 mass, respectively.

[0045] Physical performance tests were performed on the PA6 / hydroxy-terminated hyperbranched polyester particles prepared in Examples 1-4 and ordinary commercially available pure PA6. The test results are shown in Table 1.

[0046] Table 1 Physical properties of PA6 / hydroxy-terminated hyperbranched polyester prepared in Examples 1-4 and pure PA6

[0047] Test items

[0048] Tensile strength MPa

Embodiment 5

[0050] (1) Dry the hydroxyl-terminated hyperbranched polyester Boltorn H20 in a vacuum oven at room temperature for 5 hours, and store it in a dry and sealed space;

[0051] (2) Put pure PA6 and long glass fiber in a blast oven at 110℃ to dry for 6 hours, and cool to room temperature in a dry and sealed space;

[0052] (3) Put the dried hydroxyl-terminated hyperbranched polyester Boltorn H20 obtained in step (1) and the dried pure PA6 obtained in step (2) in a high-speed mixer, mix for 3 minutes, and then introduce into a sealed and dry lower hopper spare;

[0053] (4) Heat the 10 temperature control zones of the twin-screw extruder to 230°C. After preheating for 1 hour, the material is extruded and granulated; the long glass fiber is added in the fourth zone of the twin-screw extruder, and the long glass fiber The added amount is 25% of the mass of pure PA6;

[0054] (5) Then dry the produced particles in a blast oven at 110°C for 6 hours to obtain long glass fiber reinforced PA6 / hy...

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PUM

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Abstract

The invention relates to a hyperbranched polyester, particularly application of a hyperbranched polyester in PA6 (polyamide 6). The application comprises the following steps: (1) drying hydroxyl-terminated hyperbranched polyester; (2) drying pure PA6; (3) uniformly mixing the hydroxyl-terminated hyperbranched polyester obtained in the step (1) with the pure PA6 obtained in the step (2); and (4) granulating the uniformly mixed hydroxyl-terminated hyperbranched polyester and pure PA6 obtained in the step (3) by using a double screw extruder, and drying to obtain the modified PA6 product. The application can obviously lower the melt viscosity of PA6 and improve the physical properties.

Description

Technical field [0001] The invention relates to a hyperbranched polyester, in particular to the application of a hyperbranched polyester in PA6. Background technique [0002] PA6 has good chemical, mechanical and heat resistance properties and is recognized as the most cost-effective engineering plastic. It is widely used in electronics, consumer products and engineering components. However, the high water absorption rate is caused by the polarity of the amide group in the PA6 molecule, which will cause poor dimensional stability, lower product modulus and yield stress, and lower rigidity at low temperatures. Etc., thus limiting the possible application areas of PA6. In addition, during the melt processing of PA6, thermal degradation occurs at temperatures exceeding 260°C, which will affect the performance of the product. The modification of PA6 has been carried out by blending, copolymerizing, filling fillers or reinforcing fibers, etc., to produce a stronger and stricter mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L67/00C08K7/14
CPCC08L77/02C08L67/00C08K7/14
Inventor 李武松康宏强刘聪聪
Owner WEIHAI CY DENDRIMER TECH
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