Low-acid-separation red phosphorus inflaming retarding reinforced polyamide material as well as preparation method and application thereof

Abstract

The invention discloses a low-acid-separation red phosphorus inflaming retarding reinforced polyamide material which is prepared from the following raw materials by weight: 40%-65% of polyamide, 5%-25% of red phosphorus fire retardant, 1%-2% of anti-separation auxiliary agent, 0.5%-5.0% of heat stabilizer, 0.5%-2% of lubricating agent and 15%-40% reinforcing component. According to the invention, acid separation caused by the presence of red phosphorus can be greatly reduced; the low-acid-separation red phosphorus inflaming retarding reinforced polyamide material has good thermal properties such as heat resistance, ageing resistance and the like, good mechanical properties such as high strength and the like, and good electrical properties such as high CTI (Comparative Tracking Index), and is particularly suitable for preparation of electronic and electric appliances, especially for electronic products which are used under the high-temperature high-humidity rigorous conductions. The invention also discloses a preparation method of the low-acid-separation red phosphorus inflaming retarding reinforced polyamide material. The preparation method is simple, has good controllability and is easy to industrially produce; and by using the preparation method, the separation of acid in the preparation process can be reduced.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a low-acid precipitation red phosphorus flame-retardant reinforced polyamide material and its preparation method and application. Background technique [0002] Polyamide is collectively referred to as nylon (Nylon), and the English name is Polyamide (referred to as PA). It is named after the repeated amide group -[NHCO]- in the main chain of the molecule. It is the largest output, most variety and most widely used among the five general engineering plastics , a class of basic resin with excellent comprehensive performance. [0003] Nylon has good flame retardancy due to its amide group in its molecular structure. It is a self-extinguishing material, but it is still combustible and melts and drips when it is burned. It is more flammable after adding glass fibers. In a live working environment Due to the danger of fire caused by leakage, short circuit, arc, and electric sparks, th...

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Problems solved by technology

[0005] However, there are some problems with the flame-retardant nylon material of red phosphorus masterbatch: red phosphorus will react with water to generate phosphine (phosphine) under high temperature and high humidity conditions, and generate acidic substances such as phosphoric acid and metaphosphoric acid, resulting in red phosphorus flame retardant Parts made of materials will appear "blooming" (precipitation of white needle-like substances) and "spraying" (precipitation of liquid substances) during long-term use, and because the parts usually come into contact with some metal parts (such as AC contactors, wall switches and other electronic and electrical parts), and the working environment temperature is high, once phosphine (phosphine) is produced, it will cause the electrical insulation performance of the material to decline, and will gradually corrode the metal material, resulting in functional In severe cases, it may even cause a short circuit, cause a fire, and pose a threat to people's property and life safety.

[0008] The Chinese patent application with the application number 200810026294.X discloses a thermoplastic polyamide composition reinforced with a red phosphorus flame retardant, which consists of 30% to 90% by weight of thermoplastic polyamide resin, 1% to 30% of Composition of encapsulated red phosphorus, 10% to 50% fiber reinforcement and 0 to 25% additives, although its flame retardancy has been improved to a certain extent, the mechanical and electrical properties of the material are still insufficient. needs to be further improved

The technical scheme disclosed in this patent application makes the production of phosphine greatly reduce by coating red phosphorus on the surface to make microcapsule coated red phosphorus, but when used at high temperature and / or stored under closed conditions, the water The presence still leads to the production of phosphine (phosphine)

[0009] It can be seen that the current research is mainly to use various flame retardants and flame retardant synergists to improve the flame retardant and electrical properties of nylon, and to improve the heat aging resistance of modified materials and the appearance and appearance during later processing and use. The study on the maintenance of electrical properties has not been reported

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