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Polyamide and production method and application thereof

A polyamide and product technology, applied in the field of low-cost polyamide and its production, can solve the problem of high raw material cost

Active Publication Date: 2014-11-26
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to solve the problem of high cost of raw materials used in the synthesis of transparent polyamide in the prior art, the invention provides a polyamide and its production method

Method used

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  • Polyamide and production method and application thereof
  • Polyamide and production method and application thereof
  • Polyamide and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] The preparation of embodiment 1, nylon 5612

[0120] Under a nitrogen atmosphere, add 30kg of pure water to the reactor, then add 10.56kg (0.103mol) of pentamethylenediamine (containing organic carbon from renewable sources that meet the ASTM D6866 standard), stir, and add 7.55kg (0.051mol) of adipic acid and 11.89kg (0.051mol) of dodecanedibasic acid, and then add 3g of antioxidant H10 to prepare a nylon salt solution.

[0121] Under a nitrogen environment, the temperature of the oil bath was raised to 230°C. After the pressure in the polymerization kettle rose to 1.73Mpa, the exhaust gas was started. When the temperature in the kettle reached 265°C, the vacuum was pumped to -0.06Mpa, and the vacuum degree was maintained for 20 minutes to obtain Nylon 5612.

[0122] Fill the polymerization kettle with nitrogen to a pressure of 0.5Mpa, start melting and discharging, and use a pelletizer to granulate. After vacuum drying at 80°C for 8 hours, various performance tests w...

Embodiment 2

[0126] Embodiment 2, the preparation of nylon 5612

[0127] In addition to adjusting the addition of pentamethylenediamine to 9.46kg (0.092mol), the addition of adipic acid to 1.35kg (0.009mol) and the addition of dodecanedibasic acid to 19.18kg (0.083mol) in Example 1, The same operation as in Example 1 was carried out. According to embodiment 1, using 1 Characterized by H-NMR, it was confirmed that the target product was obtained. Various performance tests were carried out on the obtained polyamide resin, and the results are shown in Table 1.

Embodiment 3

[0128] Embodiment 3, the preparation of nylon 5612

[0129] In addition to adjusting the addition of pentamethylenediamine to 11.94kg (0.117mol), the addition of adipic acid to 15.36kg (0.105mol) and the addition of dodecanedioic acid to 2.69kg (0.011mol) in Example 1, The same operation as in Example 1 was carried out. According to embodiment 1, using 1 Characterized by H-NMR, it was confirmed that the target product was obtained. Various performance tests were carried out on the obtained polyamide resin, and the results are shown in Table 1.

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Abstract

The invention provides polyamide and a production method and application thereof. The polyamide is shown as -[(NH-R1-NH)-(OC-R2-CO / OC-R3-CO)]m-, wherein R1 is preferably straight chain alkyl having 3-8 carbon atoms; R2 is preferably straight chain alkyl having 4-8 carbon atoms; and R3 is preferably straight chain alkyl having 6-20 carbon atoms. The polyamide provided by the invention does not need to form transparency by means of addition and modification, so that the problems of sensitivity to the content of additives, aging and migration occurring after a long time, and the like are solved.

Description

technical field [0001] The invention relates to a polymer material and a production method thereof, in particular to a low-cost polyamide and a production method thereof. Background technique [0002] Since the invention of polyamide (nylon, PA) by W.H.Carothers of DuPont in the United States in the 1930s, it has been widely used because of its high mechanical strength, good impact toughness, excellent heat resistance, wear resistance and oil resistance. In various fields of the national economy such as machinery, national defense, chemical industry, transportation, and water conservancy, its production capacity and output have always ranked first among the five major engineering plastics. [0003] However, due to the defects of poor transparency, high water absorption, low impact strength in dry state and low temperature of polyamide, its application in some aspects is limited. For this reason, research on polyamide modification has been carried out extensively at home and...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08G69/28C08L77/06
Inventor 郑毅秦兵兵毛金旺刘驰李乃强
Owner CATHAY R&D CENT CO LTD
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