Low-water absorption biological nylon material PA610T and preparation method thereof

A technology of low water absorption and water absorption, applied in the field of low water absorption biological PA610T nylon material and its preparation, can solve the problems of reducing the multiphase coexistence and compatibility of nylon water absorption, and achieve low equipment cost, simple reaction steps, and high performance. low cost effect

Inactive Publication Date: 2014-12-31
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the existing defect that the water absorption of nylon is reduced through processing and modification, and the multi-phase coexistence and compatibility of subsequent blending processing are difficult to solve, and to provide a synthetic preparation method of biological nylon with a low water absorption rate.

Method used

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  • Low-water absorption biological nylon material PA610T and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 1694.526g of terephthalic acid, 1982.05g of sebacic acid, 2266.095g of hexamethylenediamine, 1.2896g of sodium hypophosphite, mix well and pour it into a 25L polymerization reactor, inject 3.96kg of deionized water and The nucleating agent barium sulfate 8.16865g is placed in the reactor, the stirring device is turned on, the stirring speed is 60r / min, the air reserved in the reactor is replaced with nitrogen for at least three times, and 0.02MPa nitrogen is reserved as a protective gas.

[0040] The reactor is heated by circulating heat transfer oil at a rate of 15°C per minute, and the temperature rises to 300°C (there is a process of maintaining pressure in this process, and the pressure is released after the pressure is maintained. When the temperature rises to 300°C, the pressure is maintained. The pressure value is 3.0MPa, and the boosting time is about 45min) (the boosting time refers to the stage from the end of the heat preservation to the pressure holding...

Embodiment 2

[0042] Weigh 1711.139g of isophthalic acid, 1961.825g of sebacic acid, 2277.716g of hexamethylenediamine, and 6.5745g of magnesium phosphate in proportion, mix well and pour it into a 25L polymerization reactor, inject 4.68kg of deionized water and nucleate Put 4.7042g of calcium carbonate in the reaction kettle, turn on the stirring device, the stirring speed is 60r / min, fill in helium to vacuumize, repeat 3 times, get rid of the air reserved in the kettle, and reserve 0.05MPa helium as protective gas.

[0043]The reactor is heated by circulating heat transfer oil at a rate of 12°C per minute, and the temperature rises to 300°C. When the temperature of the reactor is 120°C, the inside of the reactor is kept warm for 1.5 hours. After the heat preservation is completed, the reactor is heated. When the temperature rises, the pressure rises accordingly. After the pressure rise time is about 28 minutes, when the pressure is 2.25MPa, the pressure of the reactor is realized by relea...

Embodiment 3

[0045] Weigh 1882.2529g of phthalic acid, 2158.0075g of sebacic acid, 2510.60084g of hexamethylenediamine, and 2.0414g of potassium hypophosphite in proportion, mix them uniformly and pour them into the polymerization reactor, inject 5.22kg of deionized water and Put 3.0042g of nuclear agent silicon dioxide in the reaction kettle, turn on the stirring device, the stirring speed is 60r / min, fill in argon to vacuumize, repeat 3 times, remove the air reserved in the kettle, and reserve 0.03MPa argon gas as a protective gas.

[0046] The reactor is heated by circulating heat transfer oil at a rate of 13°C per minute, and the temperature rises to 300°C. When the temperature of the reactor is 130°C, the inside of the reactor is kept warm for 1.5 hours. When the temperature rises, the pressure rises accordingly. After the pressure rise time is about 33 minutes, when the pressure is 2.4MPa, the pressure of the reactor is maintained by releasing the water vapor generated by the system ...

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Abstract

The invention belongs to the field of polymer nylon synthesis and relates to a low-water absorption biological nylon material PA610T and a preparation method thereof. The low-water absorption biological nylon material PA610T is prepared from 28-30 parts by weight of aromatic diacid, 32-34 parts by weight of sebacic acid, 38-38.5 parts by weight of hexanediamine, 0.1-0.3 parts by weight of a nucleating agent, 0.0003-0.0005 parts by weight of a catalyst and 30-50 parts by weight of deionized water. The low-water absorption biological nylon material PA610T has good fluidity and more ideal mechanical properties. Nylon prepared from the low-water absorption biological nylon material PA610T has water absorbency far lower than that of common nylon. The low-water absorption biological nylon material PA610T greatly widens a nylon application field.

Description

technical field [0001] The invention belongs to the field of polymer material nylon synthesis, and relates to a biological PA610T nylon material with low water absorption rate and a preparation method thereof. technical background [0002] Nylon (polyamide) is the most widely used thermoplastic engineering plastic at home and abroad. It has excellent properties such as toughness, wear resistance, impact resistance, fatigue resistance, corrosion resistance, and oil resistance. It is widely used in auto parts, electronic appliances, etc. In the past 60 years, industries such as machinery and machinery have grown steadily in the fierce competition of engineering plastics, and their demand has ranked first among the five major engineering plastics so far. [0003] The polyamide macromolecular chain contains polar -NH-CO-bonds, which are easy to form hydrogen bonds with water molecules, which leads to high water absorption of PA, poor dimensional stability of products, and also s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/28C08G69/26
Inventor 杨桂生柯昌月
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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