A polyamide composition resistant to high temperature thermal oxygen aging and its preparation method
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A polyamide composition and polyamide technology, applied in the field of polymer materials
Active Publication Date: 2020-10-23
合肥圆融新材料有限公司
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Patent CN105385152A discloses a high-temperature aging-resistant polyamide, which only pays attention to the performance of 150°C, and does not pay attention to the aging performance of materials above 200°C
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preparation example Construction
[0024] 1. Preparation of nano-polyamide masterbatch: the nano-polyamide masterbatch in Examples 1 to 5 of the present invention is a self-made product, and each material component includes polyamide, nanoparticle, silane coupling agent, lubricant, antioxidant Add additives and other additives to the high-mixing equipment, control the temperature at 80-160°C, stir for 3-15 minutes, and rotate at a speed of 500-2000RP / min. Add the mixed materials through the main feeding port of the twin-screw extruder. Under the process conditions of 210-280°C, vacuum at -0.05~-0.08MPa, and rotating speed of 300-500RP / min, it is melted and extruded through a twin-screw extruder, and granulated to obtain granular nano-polyamide masterbatches.
[0025] 2. The preparation method of the polyamide composition resistant to high temperature thermal oxygen aging: Weigh each raw material component by weight, and use a high-speed mixer to mix the dried polyamide, nano-polyamide masterbatch, heat stabilize...
Embodiment 1
[0027] A high-temperature thermal-oxidative aging-resistant polyamide composition, which comprises the following raw material components in parts by weight:
[0028]
[0029]
[0030] Among them, the polyamide resin is PA6; the content of nanoparticles in the nano-polyamide masterbatch is 25% wt, and the type of nanoparticles is magnesium oxide; the filler is E-type glass fiber, and the diameter of the glass fiber is 7 μm; the heat stabilizer is iodide copper; polyol is dipentaerythritol; processing aids include N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine, tris(2,4 - a mixture of di-tert-butylphenyl) phosphite and 2,4-dihydroxybenzophenone in a weight ratio of 1:1:1.
Embodiment 2
[0032] A high-temperature thermal-oxidative aging-resistant polyamide composition, which comprises the following raw material components in parts by weight:
[0033]
[0034] Among them, the polyamide resin is PA66 / PA6; the content of nanoparticles in the nano-polyamide masterbatch is 25% wt, and the type of nanoparticles is zinc oxide; the filler is E-type glass fiber, and the diameter of the glass fiber is 10 μm; the heat stabilizer is Potassium iodide; polyol is trimethylolethane; processing aids include N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, tris A mixture of (2,4-di-tert-butylphenyl) phosphite mixture and zinc stearate in a weight ratio of 1:1:2.
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Abstract
The invention discloses a high-temperature thermo-oxidative ageing resistant polyamide composition and a preparation method thereof. The high-temperature thermo-oxidative ageing resistant polyamide composition is prepared from the following raw-material components in parts by weight: 100 parts of polyamide resin, 10 to 60 parts of filling agent, 0.1 to 5 parts of heat stabilizer, 0.15 to 5 parts of polyol, 0.2 to 6 parts of nano polyamide master batch and 0.5 to 3 parts of processing aid, wherein the nano polyamide master batch is a self-made product; the content of a nano particle is in a range of 25%wt. The high-temperature and thermo-oxidative ageing resistant polyamide composition selects and uses the proper heat stabilizer and is supplemented by the polyol and the nano particle; all the components interact; meanwhile, the corresponding processing aid is added; the high-temperature thermo-oxidative ageing resistant polyamide composition is obtained; the high-temperature thermo-oxidative ageing resistant polyamide composition has excellent chemical performance, size stableness performance and high-temperature thermo-oxidative ageing resistant performance. The surface performanceof a sample piece of the polyamide composition prepared by the preparation method is excellent; no floating fiber is accumulated on a surface; the performance maintenance and the size stableness canbe good in a high-temperature condition, and the high-temperature thermo-oxidative ageing resistant polyamide composition is applicable to the fields of the use as high-temperature accessories on theperipheries of automobile engines and for other high-temperature-resistant materials.
Description
technical field [0001] The invention relates to the field of polymer materials, in particular to a polyamide composition resistant to high temperature thermal oxygen aging and a preparation method thereof. Background technique [0002] PA6 and PA66 among polyamides (Polyamides, referred to as PA) have the characteristics of high strength and excellent general chemical resistance. Ordinary PA6 and PA66 can be used in some occasions that do not require high long-term heat resistance and stability, but they are not suitable for some occasions where the long-term temperature is above 150°C, such as automotive engine parts, often above 150°C, sometimes short-term local temperature It may be above 200°C, which requires PA materials to have good thermal stability. Generally, copper salt stabilizers can form complexes with polyamides, decompose hydroperoxides, and delay the high-temperature aging degradation of polyamides. Under high-temperature aging conditions below 150°C, coppe...
Claims
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