A thermoplastic halogen-free low-phosphorus flame-retardant reinforced bio-based PA56 and PA66 composite material and preparation method thereof
A composite material, PA66 technology, applied in the field of thermoplastic halogen-free low-phosphorus flame-retardant reinforced PA56 and PA66 composite materials and their preparation, can solve the problems of contradictory environmental protection requirements, environmental and human health hazards, toxic carcinogens, etc.
Active Publication Date: 2021-09-28
CATHAY R&D CENT CO LTD +1
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- Application Information
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Problems solved by technology
At present, halogenated flame retardants are still widely used in China. Such flame retardants will generate a lot of smoke and corrosive gases during thermal cracking and combustion, and may release toxic carcinogens, such as polybrominated benzos. Oxins and polybrominated benzofurans; and in recent years, it has been found that individual brominated flame retardants (such as polybrominated diphenyl ethers) are potentially harmful to the environment and human health, which is obviously contrary to today's environmental protection requirements
Method used
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Embodiment 1
[0062] (1) Weigh the flame retardant and flame retardant synergist and mix them evenly in a high-speed mixer. The mixing temperature is 25°C, the speed is 600 rpm, and the mixing time is 3 minutes. In the storage container of the side feed of the screw extruder;
[0063] (2) Weigh the bio-based PA56, PA66, anti-dripping agent, compatibilizer, lubricant, nucleating agent and antioxidant and mix them evenly in a high-speed mixer at a mixing temperature of 25°C and a speed of 600 rpm , after 3 minutes of mixing time, transfer the mixed material to the main feeding storage container of the extruder; the glass fiber is selected as continuous long fiber, and is introduced into the extruder from the vent hole;
[0064] (3) Adjust the length-to-diameter ratio of the screw selected by the twin-screw extruder to 1:40, the screw speed to 300 rpm, and the temperature in each area of the twin-screw extruder from the main feeding port to the die mouth to be 80 ° C and 220 ° C. ℃, 250°C, ...
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Abstract
The invention relates to a thermoplastic halogen-free low-phosphorous flame-retardant reinforced bio-based PA56 and PA66 composite material and a preparation method thereof. The PA56 and PA66 composite material is at least prepared from the following raw materials in mass percentage: bio-based PA56 15-65%, PA66 15-65%, alkali-free glass fiber 15-40%, MCA flame retardant 5-20%, preferably 5-7%, phosphorus-based flame retardant synergist 1-10%, and the raw materials may further include Compatible agent 2-15%, processing aid 0.1-5%. The composite material of the invention has the characteristics of excellent comprehensive mechanical properties, flame retardant properties, processability and low consumption of flame retardants, and can be directly used for injection molding. At the same time, one of the selected raw materials has a bio-based source, which has obvious advantages in low-carbon and environmental protection, and can improve product competitiveness.
Description
technical field [0001] The invention belongs to the technical field of engineering plastics, and relates to a thermoplastic halogen-free low-phosphorus flame-retardant reinforced PA56 and PA66 composite material and a preparation method thereof, in particular to a thermoplastic halogen-free low-phosphorus flame-retardant reinforced bio-based PA56 and PA66 composite material and its Preparation. PA56 is of bio-based origin. The PA56 and PA66 composite materials have good flame retardant effect, excellent mechanical properties and processability, and have environmental protection advantages, and can be used in the fields of automobile, machinery and chemical industry where injection molding requires various raw materials to produce heat-resistant Stressed structural plastic parts. Background technique [0002] Polyamide, commonly known as nylon, is a kind of polymer material with good mechanical properties, electrical properties, heat resistance, toughness, oil resistance, w...
Claims
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IPC IPC(8): C08L77/06C08K5/3492C08K5/5313C08K3/32C08K5/523C08K5/5399C08J5/04
CPCC08J5/043C08J2377/06C08J2477/06C08K3/32C08K5/34924C08K5/523C08K5/5313C08K5/5399
Inventor 胡定军张志海秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD