Low-melting-point biological nylon material and preparation method thereof

A nylon and biological technology, which is applied in the field of polymer material nylon synthesis, can solve problems such as reducing the melting point of nylon, multiphase coexistence and compatibility, and achieves the effects of low equipment cost, simple reaction steps and low energy consumption.

Inactive Publication Date: 2014-10-01
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 melting point of nylon is lowered through processing and modification, and t

Method used

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  • Low-melting-point biological nylon material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Weigh 1495.17g (9.00mol) of terephthalic acid, 2224.75g (11.00mol) of sebacic acid, 2289.337g (19.70mol) of hexamethylenediamine, 1.2896g (0.015mol) of sodium hypophosphite, and mix Evenly pour it into a 25L reactor, inject 3.96kg of deionized water (220mol) and 101.34g of nucleating agent barium sulfate solution (8.06% by mass fraction, 0.035mol of barium sulfate) into the reactor, replace the pre- The air left in the reactor is at least three times, and 0.01MPa nitrogen is reserved as a protective gas.

[0041] (2) Heat the reactor at a rate of 15°C per minute by circulating heat transfer oil, and the temperature rises to 285°C. When the temperature of the reactor is 125°C, keep the inside of the reactor warm for 2 hours and at the same time the pressure is 2.5 At MPa, the pressure of the reactor is maintained by releasing the water vapor generated by the system reaction. The constant pressure time is 1 hour, and then the reactor is depressurized. During the proc...

Embodiment 2

[0044] (1) Weigh 1461.94g (8.80mol) of isophthalic acid, 2265.2g (11.20mol) of sebacic acid, 2539.1232g (19.20mol) of heptanediamine, 2.0414g (0.020mol) of potassium hypophosphite, and mix Evenly pour it into a 25L reactor, and inject 1151.75g ​​of ethanol solution (250mol) into the reactor. And nucleating agent titanium dioxide solution 33.9494g (mass fraction 8.94%, 0.038mol titanium dioxide) in the reactor, replace the air in the reactor with helium at least three times, and reserve 0.02MPa helium as a protective gas.

[0045] (2) Heat up the reactor by circulating heat transfer oil at a rate of 12°C per minute, and the temperature rises to 280°C. When the temperature of the reactor is 125°C, keep the inside of the reactor warm for 2.2 hours, and at the same time the pressure is When the temperature is 2.5MPa, the pressure of the reactor is maintained by releasing the water vapor generated by the reaction of the system. The constant pressure time is 1.1 hours, and then the ...

Embodiment 3

[0048](1) Weigh 1428.72g (8.6mol) of phthalic acid, 2305.65g (11.40mol) of sebacic acid, 2784.218g (19.30mol) of octyldiamine, and 4.25g (0.025mol) of calcium hypophosphite, and mix them evenly and Pour it into a 25L reactor, inject 8.65kg of methanol (270mol) and 115.83g of nucleating agent barium sulfate solution (8.06% mass fraction, 0.04mol of barium sulfate) into the reactor, and replace it with nitrogen in the reactor The air inside is at least three times, and 0.03MPa nitrogen is reserved as a protective gas.

[0049] (2) Heat the reactor at a rate of 10°C per minute by circulating heat transfer oil, and the temperature rises to 282°C. When the temperature of the reactor is 125°C, the inside of the reactor is kept warm for 2 hours and the pressure is 2.5 At MPa, the pressure of the reactor is maintained by releasing the water vapor generated by the reaction of the system. The constant pressure time is 0.8 hours, and then the reactor is depressurized. During the process...

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Abstract

The invention relates to a biological nylon material and a preparation method thereof, belonging to the field of synthesis of the high polymer material--nylon. The biological nylon material is prepared from the following components by mol: 7.4 to 9.0 mol of aromatic diacid, 11.0 to 12.6 mol of sebacic acid, 19.0 to 19.7 mol of aliphatic diamine, 0.035 to 0.05 mol of a nucleating agent, 0.015 to 0.03 mol of a catalyst and 220 to 300 mol of a solvent. Compared with the prior art, the invention has the following advantages: reaction steps are simple; the synthesized biological nylon has a high melt index and good fluidity, discharging of the biological nylon is convenient, direct traction and granulation can be realized after cooling, and the biological nylon is convenient to package, transport and store and has ideal mechanical properties; moreover, the prepared nylon has a melting point far lower than the melting point of common nylon and can realize blending with more low-melting-point polymers, so the application scope of the nylon is broadened.

Description

technical field [0001] The invention belongs to the field of polymer material nylon synthesis, and relates to a nylon material 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] Generally, the synthetic ordinary nylon has a higher melting point, so its processing temperature is also higher. Due to the contradiction between processing temperatures, it is difficult to realize the blending modification of ordinary nylon to polymers with lower p...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08G69/28C08K3/30C08K3/34C08K3/22C08K3/36
Inventor 杨桂生柯昌月
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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