A kind of transparent polyamide resin and preparation method thereof

Abstract

The invention relates to a transparent polyamide resin and a preparation method thereof. The transparent polyamide is obtained by reacting the following components in parts by weight: 100 parts of crystalline aliphatic polyamide salt A; 0.5 parts of non-crystalline polyamide salt ‑3 parts; silicon-containing polyamide salt C3‑17 parts; its preparation method is: Step 1: crystalline polyamide salt solution A, non-crystalline polyamide salt solution B, silicon-containing polyamide salt solution C at 50~ Mix and stir at 80°C to obtain a mixed salt solution; step 2: heat the above mixed salt solution to 150-180°C under a protective gas atmosphere, pressurize to 0.25-0.35MPa, evaporate and concentrate to a mass concentration of 70-80% solution; finally the molten polymer is extruded and pelletized underwater to obtain a transparent copolyamide; the present invention not only maintains the characteristics of high mechanical properties and good heat resistance of highly crystalline polyamide, but also has the characteristics of transparency to overcome The defective that existing technology exists.

Description

technical field [0001] The invention relates to a transparent polyamide and its preparation, in particular to a transparent polyamide resin and its preparation method, and products made of the transparent polyamide resin. Background technique [0002] Transparent polyamide resin is a kind of polyamide with special properties and uses. Compared with other transparent polymer materials, it has excellent characteristics such as high strength, high thermal stability, strong weather resistance, good chemical resistance, and wear resistance. With the rapid development of electronic appliances, automobiles, aerospace and other industries, transparent polyamides have huge application advantages in special fields such as optical instruments, high-voltage windows, and automotive components. [0003] At present, conventional high-crystalline polyamides, such as polyamide 66, polyamide 610, and polyamide 1010, have excellent mechanical properties and good heat resistance, but due to exc...

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Problems solved by technology

[0003] At present, conventional high-crystalline polyamides, such as polyamide 66, polyamide 610, and polyamide 1010, have excellent mechanical properties and good heat resistance, but due to excessive crystallinity, the crystallite size is relatively large, resulting in such polyamides general opacity

At present, the method of reducing the crystallization ability is generally used to improve the transparency of polyamide, for example, by introducing different molecular structures to destroy the regularity of polyamide chain segments or adding amorphous polymers to weaken the crystallization ability, but this will destroy the crystallization of polyamide itself It weakens the hydrogen bond between molecular chains, leading to the deterioration of properties such as mechanics, heat resistance, and chemical resistance, which limits the application of polyamides in some special fields.

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