Preparation method of high-temperature-resistant and high-strength material

A high-strength, high-temperature-resistant technology, applied in the field of high-temperature-resistant materials, can solve the problems of high temperature-resistant properties and strength that cannot meet people's requirements, and achieve the effects of short preparation cycle, convenient molding and low water absorption.

Inactive Publication Date: 2019-05-31
广东壹豪新材料科技股份有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0002] Polyamide, the English name PA, is a general term for high polymers containing amide groups in the repeating unit of the main chain of the macromolecule. PA is tough, wear-resistant, self-lubricating, and has a wide temperature range and has become a widely used in industry. With the rapid development of society, people have developed PA66, PPA, PA6T mater...
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Abstract

The invention discloses a preparation method of a high-temperature-resistant and high-strength material. The high-temperature-resistant and high-strength material is prepared by, by weight, 45-50 parts of polyhexamethylene adipamide, 55-60 parts of polyhexamethylene terephthalamide, 30-35 parts of polyphthalamide, 60-80 parts of caprolactam, 20-25 parts of methyl silicone oil, 15-20 parts of m-cresol, 1-2 parts of catalyst and 1-2 parts of lubricating agent. The preparation method has the advantages that the prepared material is high in density, high in strength, low in in crystallinity and melting point, convenient in forming, low in water absorption, wide in application range and high in heat resistance; little equipment is needed in the preparation process, the preparation cycle is short, preparation convenience is achieved, and the use effect of the prepared material is better than that of a material prepared by a traditional manner, people's requirements can be satisfied, and promising application prospect is achieved.

Technology Topic

Methyl siliconeCrystallinity +9

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  • Preparation method of high-temperature-resistant and high-strength material
  • Preparation method of high-temperature-resistant and high-strength material

Examples

  • Experimental program(3)
  • Comparison scheme(1)
  • Effect test(1)

Example Embodiment

[0025] Example 1
[0026] Such as figure 1 As shown, a method for preparing a high-temperature resistant and high-strength material is made of the following components by weight: 46 parts of polyhexamethylene adipamide, 56 parts of polyhexamethylene terephthalamide, and polyphthalamide 32 parts of formamide, 66 parts of caprolactam, 21 parts of methyl silicone oil, 17 parts of m-cresol, 1.1 parts of catalyst, 1.3 parts of lubricant.
[0027] The preparation method of high temperature resistant high strength material includes the following steps:
[0028] (1). Feed the raw materials needed to produce the copolymer into the reactor, and then send inert gas to the reactor to exhaust the air inside the reactor. The raw materials need to be sent to the V-type powder mixing machine before being sent to the reactor. The mixing is carried out, the mixing speed is 28r/min, and the mixing is 8 minutes, and the inert gas is one of nitrogen, helium, neon, argon, and krypton.
[0029] (2) Heating the reactor from which the air is removed, and using a stirrer to stir the raw materials inside the reactor to obtain a mixed liquid. The reaction in the reactor includes four stages;
[0030] The first stage: the temperature inside the reactor is raised to 200°C and then maintained at this temperature for 2 hours. During the reaction, the stirring rate of the stirrer is 28r/min, stirring 5 times, 9 minutes each time, stirring once every 2 minutes, until no Color liquid
[0031] Second stage: After the first stage, quickly raise the temperature inside the reactor to 258°C and maintain the temperature for 3 hours. During this stage, the stirring rate of the stirrer is 15r/min, stirring 3 times, 8 each time Minutes, stirring once every 10 minutes;
[0032] The third stage: continue to heat up after the second stage, the temperature inside the reactor rises to 275°C and then maintains the temperature for 1 hour, without stirring at this stage;
[0033] Fourth stage: After the third stage, the temperature is lowered, and the temperature inside the reactor is lowered to 255°C and the temperature is maintained for 1 hour.
[0034] (3) Send the reacted mixed liquid into a distilled water tank at room temperature to cool down to obtain a mixed solid;
[0035] (4). The mixed solid is sent to the pulverizer for pulverization, and then dried. The particles obtained are high-temperature resistant and high-strength materials. After the mixed solid is pulverized by the pulverizer, the particles of 1-3 cm are directly obtained. Using a dryer and a vacuum dryer, first go through the dryer and then through the vacuum dryer to dry, the temperature of the dryer is 95℃, the drying time is 1 hour, the temperature of the vacuum dryer is 85℃, and the drying time is 22 hours.

Example Embodiment

[0036] Example 2
[0037] A method for preparing a high-temperature resistant and high-strength material, which is made of the following components by weight: 48 parts of polyhexamethylene adipamide, 57 parts of polyhexamethylene terephthalamide, and 34 parts of polyphthalamide Parts, 70 parts of caprolactam, 22 parts of methyl silicone oil, 18 parts of m-cresol, 1.2 parts of catalyst, 1.5 parts of lubricant.
[0038] The preparation method of high temperature resistant high strength material includes the following steps:
[0039] (1). Feed the raw materials needed to produce the copolymer into the reactor, and then send inert gas to the reactor to exhaust the air inside the reactor. The raw materials need to be sent to the V-type powder mixing machine before being sent to the reactor. The mixing is carried out, the mixing speed is 26r/min, and the mixing is 8 minutes. The inert gas is one of nitrogen, helium, neon, argon, and krypton.
[0040] (2) Heating the reactor from which the air is removed, and using a stirrer to stir the raw materials inside the reactor to obtain a mixed liquid. The reaction in the reactor includes four stages;
[0041] The first stage: the temperature inside the reactor is raised to 200°C and then maintained at this temperature for 2 hours. During the reaction, the stirring rate of the stirrer is 28r/min, stirring 5 times, 9 minutes each time, stirring once every 2 minutes, until no Color liquid
[0042] Second stage: After the first stage, quickly raise the temperature inside the reactor to 258℃ and maintain the temperature for 3 hours. During this stage, the stirring rate of the stirrer is 18r/min, stirring 3 times, 8 each time Minutes, stirring once every 12 minutes;
[0043] The third stage: continue to heat up after the second stage, the temperature inside the reactor rises to 275°C and then maintains the temperature for 1 hour, without stirring at this stage;
[0044] Fourth stage: After the third stage, the temperature is lowered, and the temperature inside the reactor is lowered to 255°C and the temperature is maintained for 1 hour.
[0045] (3) Send the reacted mixed liquid into a distilled water tank at room temperature to cool down to obtain a mixed solid;
[0046] (4). The mixed solid is sent to the pulverizer for pulverization, and then dried. The particles obtained are high-temperature resistant and high-strength materials. After the mixed solid is pulverized by the pulverizer, the particles of 1-3 cm are directly obtained. Using a dryer and a vacuum dryer, first pass through the dryer and then through the vacuum dryer to dry. The temperature of the dryer is 95℃, the drying time is 1 hour, the temperature of the vacuum dryer is 90℃, and the drying time is 20 hours.

Example Embodiment

[0047] Example 3
[0048] A method for preparing a high-temperature resistant and high-strength material, which is made of the following parts by weight: 49 parts of polyhexamethylene adipamide, 57 parts of polyhexamethylene terephthalamide, and 35 parts of polyphthalamide Parts, 71 parts of caprolactam, 23 parts of methyl silicone oil, 18 parts of m-cresol, 1.3 parts of catalyst, 1.6 parts of lubricant.
[0049] The preparation method of high temperature resistant high strength material includes the following steps:
[0050] (1). Feed the raw materials needed to produce the copolymer into the reactor, and then send inert gas to the reactor to exhaust the air inside the reactor. The raw materials need to be sent to the V-type powder mixing machine before being sent to the reactor. The mixing is carried out, the mixing speed is 26r/min, and the mixing is 8 minutes. The inert gas is one of nitrogen, helium, neon, argon, and krypton.
[0051] (2) Heating the reactor from which the air is removed, and using a stirrer to stir the raw materials inside the reactor to obtain a mixed liquid. The reaction in the reactor includes four stages;
[0052] The first stage: the temperature inside the reactor is raised to 200°C and then maintained at this temperature for 2 hours. During the reaction, the stirring rate of the stirrer is 26r/min, stirring 5 times, 9 minutes each time, stirring once every 2 minutes, until no Color liquid
[0053] Second stage: After the first stage, quickly raise the temperature inside the reactor to 256°C and maintain the temperature for 3 hours. During this stage, the stirring rate of the stirrer is 16r/min, stirring 3 times, 8 each time Minutes, stirring once every 12 minutes;
[0054] The third stage: continue to heat up after the second stage, the temperature inside the reactor rises to 275°C and then maintains the temperature for 1 hour, without stirring at this stage;
[0055] Fourth stage: After the third stage, the temperature is lowered, and the temperature inside the reactor is lowered to 255°C and the temperature is maintained for 1 hour.
[0056] (3) Send the reacted mixed liquid into a distilled water tank at room temperature to cool down to obtain a mixed solid;
[0057] (4). The mixed solid is sent to the pulverizer for pulverization, and then dried. The particles obtained are high-temperature resistant and high-strength materials. After the mixed solid is pulverized by the pulverizer, the particles of 1-3 cm are directly obtained. Using a dryer and a vacuum dryer, first pass through the dryer and then through the vacuum dryer for drying. The temperature of the dryer is 93°C, the drying time is 1 hour, the temperature of the vacuum dryer is 90°C, and the drying time is 24 hours.

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Description & Claims & Application Information

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