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Nylon 66 prepared through water dissolution

A water-soluble nylon technology, applied in the field of organic polymer composite materials, can solve the problems of rough product surface, exposed glass fiber on the product surface, danger, etc., and achieve the advantages of convenient and easy preparation method, short production process and accelerated crystallization speed Effect

Inactive Publication Date: 2012-02-08
SUZHOU IND PARK XINFENGLIN PLASTIC TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, while glass fiber reinforced nylon 66 greatly improves the physical and mechanical properties of nylon 66, it also has an obvious disadvantage, that is, because the two-phase interface between glass fiber and nylon 66 is not easy to combine well, it is easy to produce glass fiber exposure on the surface of the product, which will reduce the The surface finish of the product is reduced, making the surface of the product rough and blooming, which limits the application of this raw material in products that require high surface finish or aesthetics.
[0004] But at this stage, nylon is made by using solvents such as methanol or ethanol, but because solvents such as methanol or ethanol are dangerous in the process of manufacturing nylon, and it is inconvenient to purchase, and it is more expensive to buy in the market, for ordinary manufacturers. Funding has become a big problem, so finding a low-price, high-efficiency nylon manufacturing raw material has become a major problem in the chemical industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1 provides a water-soluble nylon 66 raw material, which is composed of the following components by weight: pure hexamethylenediamine: 50%, soft water: 20%, adipic acid: 22.4%, nucleating agent: 1.5%, and others Auxiliary: 2.8%, nucleating agent: 0.4%, other auxiliaries: 2.9%.

[0011] Make pure hexamethylenediamine into an aqueous solution of about 30% with soft water, add it to the reaction kettle, slowly add an appropriate amount of pure adipic acid under normal pressure and stirring at 40-50°C, control the pH value at 7.7-7.9, and then Add nucleating agent and other auxiliary agents, and react for about 20 minutes. After the reaction, purify and filter with 0.5% to 1% activated carbon to obtain a 50% nylon 66 salt solution. The salt-forming reaction is an exothermic reaction, so the reaction heat must be removed by cooling the circulating water, and at the same time, in order to prevent the nylon 66 salt from being oxidized in contact with the air, the pro...

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Abstract

The invention relates to nylon 66 prepared through water dissolution. The nylon 66 consists of the following components in percentage by weight: 40.5 to 95 percent of nylon 66, 5.5 to 55 percent of alkali-free glass fiber, 0.1 to 3.0 percent of heat stabilizer, 0.1 to 3.0 percent of glass fiber finishing agent, 0.1 to 0.5 percent of nucleating agent and 0.3 to 5.5 percent of other aids. The invention has the advantages that: the nylon 66 is prepared by a water dissolution method, the method is convenient, easy, safe and reliable, and is lower in cost, and solvents such as methanol or ethanol and the like are not used.

Description

Technical field [0001] The present invention relates to an organic polymer composite material, and more specifically to a water-soluble nylon 66. Background technique [0002] Nylon 66 is a polyamide resin, one of the most widely used engineering plastics at present. Its amide group is polar and has strong hydrogen bonds in its structure, which makes the melting point of nylon 66 higher. If the volume is The temperature at which the expansion coefficient shows a maximum value is regarded as the melting point. The melting point temperature range of nylon 66 is 246~263℃. Close to the theoretical melting temperature of 259°C. It has good physical and mechanical properties, wear resistance and self-lubricating properties. However, pure nylon 66 has shortcomings such as a low heat distortion temperature, high water absorption, low impact strength before water absorption, and a significant decrease in rigidity after water absorption, which limits the application of nylon 66 and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/28
Inventor 王志凤
Owner SUZHOU IND PARK XINFENGLIN PLASTIC TECH
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