Modified thermal-oxidative aging resistant nylon and preparation process thereof

Abstract

The invention relates to the field of novel plastic materials, in particular to modified thermal-oxidative aging resistant nylon for an automobile and a preparation process thereof. The modified thermal-oxidative aging resistant nylon for the automobile comprises the components in parts by weight: 50-60 parts of nylon 66, 30-40 parts of long glass fiber, 0.5-2 parts of a flexibilizer, 2-5 parts of a compatilizer, 1-3 parts of a main antioxidant, 0.5-1.5 parts of a sub antioxidant, 0.5-2 parts of a heat stabilizer and 1-4 parts of a coupling agent. The modified thermal-oxidative aging resistant nylon for the automobile, provided by the invention, has the advantages of good thermal oxidation resistance, good aging resistance, good impact resistance, long service life and so on.

Description

technical field

[0001] The invention relates to the field of new plastic materials, in particular to modified heat and oxygen aging-resistant nylon for automobiles and a preparation process thereof. Background technique

[0002] Nylon is a general term for thermoplastic resins containing repeated amide groups on the main chain of the molecule. Its name is determined by the specific number of carbon atoms in the synthetic monomer. It has superior mechanical strength, stiffness, toughness, mechanical shock absorption and wear resistance. , has gradually replaced metal and thermosetting materials and is widely used in auto parts, such as car radiator boxes.

[0003] The car radiator is a structure specially used for engine heat dissipation, which is composed of water inlet chamber, water outlet chamber, radiator core, radiator box and other parts. Coolant flows inside the radiator core and air passes outside the radiator. The hot coolant cools by dissipating heat to the air, ...

Examples

specific Embodiment 1

[0025] Modified heat and oxygen aging-resistant nylon for automobiles, including the following components in parts by weight: 6660 parts of nylon, 30 parts of long glass fiber, 1 part of toughening agent, 3 parts of compatibilizer, 2 parts of main antioxidant, auxiliary antioxidant 1.5 parts of oxygen agent, 0.5 parts of heat stabilizer, and 2 parts of coupling agent.

specific Embodiment 2

[0027] Modified heat and oxygen aging-resistant nylon for automobiles, including the following components in parts by weight: 6654 parts of nylon, 35 parts of long glass fiber, 1 part of toughening agent, 3.5 parts of compatibilizer, 2 parts of main antioxidant, auxiliary antioxidant 1.5 parts of oxygen agent, 0.5 parts of heat stabilizer, and 2.5 parts of coupling agent.

specific Embodiment 3

[0029] Modified heat and oxygen aging-resistant nylon for automobiles, including the following components in parts by weight: 6648 parts of nylon, 40 parts of long glass fiber, 1 part of toughening agent, 4 parts of compatibilizer, 2 parts of main antioxidant, auxiliary antioxidant 1.5 parts of oxygen agent, 0.5 parts of heat stabilizer, and 3 parts of coupling agent.

[0030] Control group:

[0031] The high-strength PA66 composite material includes the following components in parts by weight: 6692 parts of nylon, 2 parts of toughening agent, 3 parts of primary antioxidant, 2 parts of secondary antioxidant, and 1 part of heat stabilizer.

[0032] In above-mentioned each embodiment, the length of long glass fiber is 0.6mm; Nylon 66 viscosity is 2.6; Coupling agent is the aminosilane coupling agent that concentration is 5%; Toughening agent is the vinyl octane of maleic anhydride graft modification ethylene copolymer, styrene-butadiene-styrene triblock copolymer, styrene-ethyl...

technical field

[0001] The invention relates to the field of new plastic materials, in particular to modified heat and oxygen aging-resistant nylon for automobiles and a preparation process thereof. Background technique

[0002] Nylon is a general term for thermoplastic resins containing repeated amide groups on the main chain of the molecule. Its name is determined by the specific number of carbon atoms in the synthetic monomer. It has superior mechanical strength, stiffness, toughness, mechanical shock absorption and wear resistance. , has gradually replaced metal and thermosetting materials and is widely used in auto parts, such as car radiator boxes.

[0003] The car radiator is a structure specially used for engine heat dissipation, which is composed of water inlet chamber, water outlet chamber, radiator core, radiator box and other parts. Coolant flows inside the radiator core and air passes outside the radiator. The hot coolant cools by dissipating heat to the air, ...

Examples

specific Embodiment 1

[0025] Modified heat and oxygen aging-resistant nylon for automobiles, including the following components in parts by weight: 6660 parts of nylon, 30 parts of long glass fiber, 1 part of toughening agent, 3 parts of compatibilizer, 2 parts of main antioxidant, auxiliary antioxidant 1.5 parts of oxygen agent, 0.5 parts of heat stabilizer, and 2 parts of coupling agent.

specific Embodiment 2

[0027] Modified heat and oxygen aging-resistant nylon for automobiles, including the following components in parts by weight: 6654 parts of nylon, 35 parts of long glass fiber, 1 part of toughening agent, 3.5 parts of compatibilizer, 2 parts of main antioxidant, auxiliary antioxidant 1.5 parts of oxygen agent, 0.5 parts of heat stabilizer, and 2.5 parts of coupling agent.

specific Embodiment 3

[0029] Modified heat and oxygen aging-resistant nylon for automobiles, including the following components in parts by weight: 6648 parts of nylon, 40 parts of long glass fiber, 1 part of toughening agent, 4 parts of compatibilizer, 2 parts of main antioxidant, auxiliary antioxidant 1.5 parts of oxygen agent, 0.5 parts of heat stabilizer, and 3 parts of coupling agent.

[0030] Control group:

[0031] The high-strength PA66 composite material includes the following components in parts by weight: 6692 parts of nylon, 2 parts of toughening agent, 3 parts of primary antioxidant, 2 parts of secondary antioxidant, and 1 part of heat stabilizer.

[0032] In above-mentioned each embodiment, the length of long glass fiber is 0.6mm; Nylon 66 viscosity is 2.6; Coupling agent is the aminosilane coupling agent that concentration is 5%; Toughening agent is the vinyl octane of maleic anhydride graft modification ethylene copolymer, styrene-butadiene-styrene triblock copolymer, styrene-ethyl...

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