Toughened nylon 66 material and its preparation method and application

A nylon and toughening technology, which is applied in the field of nylon materials and its preparation, can solve the problems of affecting heat resistance, poor compatibility, and affecting the tensile strength and bending strength of nylon 66 composite materials, so as to improve the elastic modulus and strength The effect of reduction, good heat resistance, good dimensional stability and strength stability

Active Publication Date: 2018-01-16
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor compatibility of some modifiers, after modifying nylon 66, although its impact strength can be improved, it may affect the tensile strength and bending strength of the final product nylon 66 composite material; and although Other modifiers can improve its toughness, but will affect its heat resistance

Method used

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  • Toughened nylon 66 material and its preparation method and application
  • Toughened nylon 66 material and its preparation method and application
  • Toughened nylon 66 material and its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0038]

[0039] A kind of preparation method of toughening nylon 66 material, it comprises the steps:

[0040] (1), 100 parts of dry nylon 66, 4-20 parts of silicone rubber raw rubber, 0.3-0.8 parts of antioxidant and 0.024-0.3 parts of vulcanizing agent are mixed uniformly to obtain a premix;

[0041] (2) Add the premixed material to a twin-screw extruder for melt blending, and obtain a toughened nylon 66 material after cooling, drawing and pelletizing.

[0042] Wherein, in step (1), the dried nylon 66 is obtained by drying nylon 66 in a dryer at 100° C. for 12 hours.

[0043] In step (1), mixing is carried out in a high-speed mixer, and the mixing time can be 3-5min.

[0044] In step (1), the weight portion of silicone rubber raw rubber can also be preferably 8-12 parts; And / or, the weight portion of antioxidant can also be preferably 0.5-0.6 part; And / or, the weight of vulcanizing agent Parts can also preferably be 0.065-0.14 parts.

[0045] In step (2), the temperatur...

Embodiment 1

[0058] The content of each component of the toughened nylon 66 material in this embodiment is shown in Table 1 below.

[0059] Table 1 Component content table of the toughened nylon 66 material in Example 1

[0060]

[0061]

[0062] In Table 1, the weight part of nylon 66 is the weight after drying (dry weight), the same below.

[0063] The preparation method of the toughened nylon 66 material in the present embodiment comprises the steps:

[0064] (1) Dry nylon 66 in a dryer at 100°C for 12 hours to obtain dried nylon 66;

[0065] (2), take dry nylon 66, silicon rubber raw rubber, antioxidant, vulcanizing agent according to the weight part of table 1 and mix 5min in high-speed mixer, obtain premix;

[0066] (3) The premixed material is added to a twin-screw extruder for melt blending, and the toughened nylon 66 material is obtained after cooling, drawing and pelletizing.

[0067] Wherein, in step (3), the temperature of each zone of the twin-screw extruder is: the t...

Embodiment 2

[0069] The content of each component of the toughened nylon 66 material in this embodiment is shown in Table 2 below.

[0070] Table 2 Component content table of the toughened nylon 66 material of Example 2

[0071]

[0072] The preparation method of the toughened nylon 66 material in the present embodiment comprises the steps:

[0073] (1) Dry nylon 66 in a dryer at 100°C for 12 hours to obtain dried nylon 66;

[0074] (2), according to the parts by weight of Table 2, take dry nylon 66, silicone rubber raw rubber, antioxidant, vulcanizing agent and mix 5min in high-speed mixer, obtain premix;

[0075] (3) The premixed material is added to a twin-screw extruder for melt blending, and the toughened nylon 66 material is obtained after cooling, drawing and pelletizing.

[0076] Wherein, in step (3), the temperature of each zone of the twin-screw extruder is: the temperature of the first zone is 230°C, the temperature of the second zone is 235°C, the temperature of the third ...

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Abstract

The invention provides a toughened nylon 66 material and a preparation method and application thereof. The nylon material is prepared from 100 parts of nylon 66, 4-20 parts of crude silicon rubber, 0.3-0.8 part of an antioxidant and 0.024-0.3 part of a sulfurizing reagent. The preparation method comprises the steps that the nylon 66, the crude silicon rubber, the antioxidant and the sulfurizing reagent are weighed according to the parts by weight, after being mixed to be uniform, the components are added into a double-screw extruder for melting and blending, and cooling, traction and chopping are performed to obtain the toughened nylon 66 material. The raw silicon rubber is used as a toughening agent, the dynamic vulcanization technology is adopted for toughening the nylon 66, the silicon rubber can be evenly dispersed into a nylon 66 base body in a micron order small particle shape, and therefore the toughened nylon 66 material with the high toughness and good heat resistance is obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a nylon material and its preparation method and application. Background technique [0002] Nylon 66 has been more and more widely used due to its excellent properties such as abrasion resistance, solvent resistance and wide service temperature. However, because nylon 66 contains polar groups and has high water absorption, it will If it is used, it will easily lead to the reduction of elastic modulus and strength, thereby affecting its dimensional stability; at the same time, because nylon 66 is easily brittle at low temperature and dry state, resulting in poor impact performance, these all limit its further development. Applications. [0003] In order to expand the application of nylon 66, so that it has higher impact resistance, lower water absorption or better processability, it needs to be modified with a modifier. Due to the poor compatibility of some modifiers, aft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L83/07C08L83/08C08K5/14
CPCC08L77/06C08L2201/08C08L83/04C08K5/14C08L83/08
Inventor 杨桂生田文伟赵冬云
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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