Non-antimony flame-retardant polyamide composite material and preparation method and application thereof
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A flame-retardant polyamide and composite material technology, which is applied in the field of modified polymer new materials, can solve the problems of easy flow marks and low CTI value, and achieve the effect of reducing production costs and facilitating industrial production
Active Publication Date: 2012-11-28
上海耐特复合材料制品有限公司
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[0004] The technical problem to be solved by the present invention is to overcome the scarcity resource antimony trioxide contained in the existing polyamide composite material, and the CTI value of the polyamide composite material using antimony trioxide is not high, and the surface of zinc borate is easily damaged during injection molding. For defects such as flow marks, a non-antimony flame-retardant polyamide composite material is provided. The composite material does not contain antimony trioxide and zinc borate, and the CTI value of the composite material is greater than 400V, and there will be no flow marks, etc. question
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Embodiment 1-3
[0036] The raw material formula of the non-antimony flame-retardant polyamide composite material and the performance parameters of the obtained composite material are shown in Table 1.
[0037] The preparation method of the non-antimony flame-retardant polyamide composite material is as follows: add all other components in the formula in Table 1 except PA66 and reinforcing modifier (alkali-free glass fiber and wollastonite) to a high-speed mixer and mix uniformly to obtain a mixture ,take out. Add PA66 from the main feeding port of the twin-screw extruder, add the mixture at the first side feeding port, and then add the reinforcement modifier at the second side feeding port, so that all the materials in the twin-screw extruder Mix evenly, extrude, cool, and pelletize to obtain non-antimony flame-retardant polyamide composite material.
[0038] The extrusion temperatures of Examples 1-3 from the feed section to the die are: 240°C, 275°C, 280°C, 275°C, 270°C, 265°C, 265°C and 2...
Embodiment 4
[0043] The raw material formula of the non-antimony flame-retardant polyamide composite material and the performance parameters of the obtained composite material are shown in Table 1.
[0044] The preparation method of the non-antimony flame-retardant polyamide composite material is as follows: add all other components in the formula in Table 1 except PA6 and reinforcing modifier (wollastonite) to a high-speed mixer and mix uniformly to obtain a mixture, and take it out. Add PA6 from the main feeding port of the twin-screw extruder, add the mixture at the first side feeding port, and then add the reinforcement modifier at the second side feeding port, so that all materials are in the twin-screw extruder Mix evenly, extrude, cool, and pelletize to obtain non-antimony flame-retardant polyamide composite material.
[0045] The extrusion temperature of Example 4 from the feed section to the die is respectively: 210°C, 230°C, 245°C, 245°C, 240°C, 235°C, 230°C and 230°C, and the di...
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Abstract
The invention provides a non-antimony flame-retardant polyamide composite material, which comprises the following raw materials in percentage by weight: 20 to 90 percent of polyamide, 5 to 25 percent of halogen flame retardant, 2 to 10 percent of non-antimony flame-retardant synergist, 0.1 to 3 percent of lubricant, 0.1 to 1 percent of antioxidant, 0.3 to 3 percent of surface modifying agent and 1 to 40 percent of enhancement modifying agent, wherein the non-antimony flame-retardant synergist comprises magnesium oxide, silicon dioxide and tin dioxide in a molar ratio of (2-3):(1-2):1. The invention also provides a preparation method for the non-antimony flame-retardant polyamide composite material and application of the non-antimony flame-retardant polyamide composite material. According to the non-antimony flame-retardant polyamide composite material, a comparative tracking index (CTI) value is improved to more than 400 V under the condition of no antimony sesquioxide and zinc borate, the phenomenon of flow marks is avoided, and the production cost is reduced. The non-antimony flame-retardant polyamide composite material can be prepared by the conventional equipment and the conventional method, manufacturing equipment is not needed to be transformed, and industrial production is easy to realize.
Description
technical field [0001] The invention relates to the field of modified polymer new materials, in particular to a non-antimony flame-retardant polyamide composite material and its preparation method and application. Background technique [0002] Polyamide, commonly known as nylon (PA), is a general term for a class of thermoplastic resins containing repeated amide groups (-NHCO-) in the main molecular chain. Unmodified polyamides have poor flame retardancy and can easily cause fires during use. Therefore, flame retardant modification of polyamide is required in the fields of electronic appliances and other applications. The main types of flame retardants that can be used for flame-retardant modification of polyamides are halogen-based, phosphorus-based, nitrogen-based, etc. At present, halogenated flame retardant polyamides are the most widely used. Halogenated flame retardants usually need to be combined with flame retardant synergists to achieve good flame retardant per...
Claims
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