Bromine-free flame-retardant nylon

Abstract

The invention discloses a bromine-free flame-retardant nylon which comprises the following raw materials by weight percent: 40-85% of nylon, 12-25% of bis (hexachlorocyclopentadiene) cyclooctane, 3-10% of synergist, 0-35% of enhancer and 0-1% of antioxidant. The bromine-free flame-retardant nylon which is prepared from the specific raw materials has excellent flame retardance and good electrical properties. Because the flame-retardant synergist can be one or more of the zinc oxide, the diantimony trioxide, the zinc borate and the ferric oxide, the complete dependence on the diantimony trioxide is avoided. The problems that high flame retardance and low cost of the existing fire-retardant nylon are difficult to meet at the same time are solved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to bromine-free flame-retardant nylon and a preparation method thereof. Background technique [0002] Nylon has the advantages of high strength, wear resistance, and good self-lubrication. It is one of the most widely used engineering plastics and is widely used in various electronic and electrical equipment and home appliances. With the rapid development of the electrical and electronic industry and the great investment in infrastructure, the demand for flame-retardant engineering plastic materials is increasing, such as low-voltage contactors, circuit breakers, low-voltage switches, etc., all need to have good comprehensive mechanical properties and flame retardant performance engineering plastics. Nylon is currently the most widely used engineering plastic with good comprehensive mechanical properties and electrical insulation properties. [0003] At present, most of the flame ...

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Problems solved by technology

[0005] The Chinese patent application with the publication number CN1990552A discloses a kind of flame retardant enhanced high comparative tracking index polyamide composite material, which uses red phosphorus and brominated polystyrene as a flame retardant, although the CTI value reaches 400V The above, but the main disadvantage of using red phosphorus as a flame retardant is the color tone problem. Except for dark red and black, it cannot give the product more color options, and cannot prepare colored products; at the same time, red phosphorus is not compatible with most polymers. Well, it affects the flame retardancy and mechanical properties of the final product

In addition, red phosphorus has been in contact with the air for a long time, and the oxygen-containing acid that generates phosphorus will cause corrosion to metal components in electrical products, and will also release highly toxic pH 3 gas, pollution

[0006] Chinese patent ZL200610053337.4 discloses a high CTI value and high flame retardancy reinforced polyamide, which uses a polymeric flame retardant polybrominated styrene as a flame retardant, antimony trioxide as a synergist, and is used for silicone To increase the CTI value, although the CTI value can reach more than 525V, but the unit price of polybrominated styrene and silicone is relatively high, resulting in a high cost of the formula system

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