A preparation method of magnesium hydroxide/aluminum hydroxide/zinc borate synergistic flame-retardant optical cable PVC flame-retardant sheath material
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A technology of aluminum hydroxide and magnesium hydroxide, which is applied in the field of preparation of flame-retardant composite materials, can solve the problems of reduced mechanical properties and poor smoke suppression effect of optical cable flame-retardant sheath materials, and can improve the leakage trace index and limit oxygen index , the effect of reducing the dosage
Active Publication Date: 2022-02-15
HARBIN UNIV OF SCI & TECH
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[0003] The present invention aims to solve the technical problems of reduced mechanical properties and poor smoke suppression effect of the optical cable flame-retardant sheath material prepared by the existing method, and provides a magnesium hydroxide / aluminum hydroxide / zinc borate synergistic flame-retardant optical cable PVC flame-retardant sheath Nesting preparation method
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specific Embodiment approach 1
[0026] Embodiment 1: In this embodiment, a method for preparing a magnesium hydroxide / aluminum hydroxide / zinc borate synergistic flame-retardant optical cable PVC flame-retardant sheath material is carried out according to the following steps:
[0027] 1. Weigh 8-10 parts by mass of nano-magnesium hydroxide, 8-10 parts of nano-aluminum hydroxide, 8-10 parts of zinc borate particles, 1.5-2.0 parts of sodium stearate, 3-5 parts of silane coupling agent, 100 parts of PVC resin, 0.9-1.1 parts of pigment carbon black, 1.0-1.1 parts of stearic acid, 42-46 parts of dimethyl nylon acid, 9-11 parts of chlorinated paraffin 52, 6.5-7.5 parts of Ca / Zn compound Stabilizer, 0.2~0.3 parts of hydrotalcite, 0.2~0.3 parts of (3S,6E,10S)-6,10-dimethyl-3-isopropylcyclodecan-6-ene-1,4-dione, 0.2 ~0.3 part of pentaerythritol, 0.1~0.3 part of calcium stearate, 0.1~0.2 part of tetraerythritol ester and 0.04-0.06 part of dilauryl thiodipropionate;
[0028] 2. Add the sodium stearate weighed in step 1...
specific Embodiment approach 2
[0036] Specific embodiment two: the difference between this embodiment and specific embodiment one is: PVC resin is PVC-SG2 resin in the step one; Ca / Zn composite stabilizer is CZ-931Ca / Zn composite stabilizer; The specification of zinc borate particle is Nano-scale, its particle size ≦ 100nm. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass fraction of sodium stearate solution in step 2 is 1.5%, and the mass fraction of silane coupling agent solution is 1.5%. Others are the same as in the first or second embodiment.
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Abstract
A method for preparing magnesium hydroxide / aluminum hydroxide / zinc borate synergistic flame-retardant optical cable PVC flame-retardant sheathing material, and the invention relates to the field of preparation of flame-retardant composite materials. The invention aims to solve the technical problems that the mechanical performance of the optical cable flame-retardant sheath material prepared by the existing method is reduced and the smoke suppression effect is poor. Methods: 1. weighing raw materials; 2. preparing sodium stearate and silane coupling agent solution; 3. pretreatment with flame retardant; 4. mixing materials; 5. granulating; 6. kneading. When the PVC flame retardant sheath material prepared by the present invention is burned, the three flame retardants will be decomposed, and the process will not only absorb heat, but also produce a lot of water and carbonized layers, preventing further contact between the flame and oxygen, and preventing the fire from continuing to occur . And when the hydroxide and zinc borate are flame-retardant, no harmful substances are discharged, and they can react with PVC to produce smoke, reducing the amount of smoke and toxic gases produced when PVC is burned, and have excellent flame-retardant and smoke-suppressing properties. The invention is used for preparing magnesium hydroxide / aluminum hydroxide / zinc borate synergistic flame-retardant optical cable PVC flame-retardant sheath material.
Description
technical field [0001] The invention relates to the field of preparation of flame-retardant composite materials. Background technique [0002] Optical fiber communication has become an important information transmission channel in the communication industry such as cable television network and digital optical fiber communication system due to its advantages of large transmission capacity, long transmission distance, light weight, strong anti-electromagnetic interference ability, and high fidelity. With the advancement of my country's fiber-to-the-home and fiber-to-the-desktop plans, a large number of optical cables have been laid and used, causing more and more fires, and the consequences have become more and more serious. In order to reduce the occurrence of fires, in addition to standardizing the cable laying environment and strengthening security measures, it is especially necessary to start from the structure, performance, and materials of the cable itself. Improving the...
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