Polyamide resin composition and preparation method thereof

Abstract

The invention discloses a polyamide resin composition and a preparation method thereof. The polyamide resin composition comprises the following components in parts by weight: 5-60 parts of a polyamideresin, 0.1-5 parts of a metal salt compound and 0.5-35 parts of a keto carbonyl polymer. The polyamide resin composition is selected from compounds with ketone units derived from alkene comonomer repeating units and carbon monoxide repeating units of an alternative structure; the content of ketone carbonyl of a ketone carbonyl polymer is 15-80wt%, optionally 30-80wt%, and the number-average molecular weight of the ketone carbonyl polymer is greater than or equal to 1*10<4> and small than or equal to 3*10<5>. The metal element of the metal salt compound is selected from at least one of main families I-II and secondary families I-II, and anions paired with metal ions are selected from at least one of halide ions and acetate ions. The polyamide resin composition disclosed by the invention has the advantages of excellent long-term thermal oxidation resistance, excellent long-term damp-thermal aging resistance under a relative humidity condition of 85 DEG C and 90%, low cost, and the like.

Description

technical field [0001] The invention relates to the technical field of polymer chemistry, in particular to a polyamide resin composition and a preparation method thereof. Background technique [0002] Due to their excellent mechanical properties, chemical resistance, processability, and heat-oxidative aging resistance, polyamides are often used in the electronics and motor vehicle industries that have strict requirements on the working environment. Among them, the applications around the motor vehicle engine Very common. The demand for high temperature resistance of materials in the field of motor vehicles is becoming more and more obvious. This is based on the fact that the temperature in the surrounding area of ​​the automobile engine is usually higher than 150 ° C, especially for engines with turbocharged air intake, the temperature is even higher than 180 ° C or even High temperature above 200°C. As polyamide compositions are often used at such service temperatures, th...

AI Technical Summary

Problems solved by technology

However, the amount of polyol added is large and the cost is high

Moreover, when it is treated under more stringent test conditions (85°C and 90% relative humidity) for 14 days, its thermal oxygen aging resistance will gradually decrease, and when it is extended to 21 days, it is found that its thermal oxygen aging resistance will drop significantly , because of its poor long-term moisture and heat aging resistance under this condition

Therefore, its scope of application is limited

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