Fire retardant containing flame retardant synergistic combinations and preparation method thereof

Abstract

The invention discloses a fire retardant containing flame retardant synergistic combinations and a preparation method thereof, wherein the fire retardant containing flame retardant synergistic combinations comprises raw materials with part by weight: organic waste silicone rubber 20-40 parts, cyanurtriamide and / or dicyanamide 10-20 parts, silane coupling agent 1-5 parts, alkali 5-15 parts, alcohol 80-120 parts, water 30-50 parts and flame retardant synergistic combinations 1-10 part, the flame retardant synergistic combinations comprise components with part by weight: carbon nano tube 4-6 parts, nano-mesoporous molecular sieves 4-6 parts, polyether modified silicone 1-3 parts and nano-sized aluminum nitride 1-3 parts. The fire retardant containing flame retardant synergistic combinations and the preparation method thereof are excellent in hydrophobic property, can obviously improve flame retardant performance of polypropylene, achieve UL-94V-0 flame retardant performance, and can achieve above 39% limit oxygen index. Furthermore, the fire retardant containing flame retardant synergistic combinations and the preparation method thereof further can obviously improve the smoking situations and dripping situations when the polypropylene is burnt and mechanical properties of materials (tensile strength, bending strength and impact strength).

Description

Technical field [0001] The invention relates to the field of recycling and utilization of organic silicon rubber waste, in particular to a flame retardant containing a flame retardant synergistic composition and a preparation method thereof. Background technique [0002] Due to its outstanding high temperature resistance, oxidation resistance, aging resistance, weather resistance and low temperature flexibility, silicone rubber has a wider range of applications. However, its raw materials are expensive, and there is always waste in processing and application. These waste materials cannot be degraded naturally due to the cross-linking of molecular chains after high-temperature vulcanization; if not properly treated, they will seriously pollute the environment. At present, how to recycle waste materials and reuse them rationally in order to realize the sustainable development of resources attracts people's attention. [0003] At present, high polymer materials have been widely used...

AI Technical Summary

Problems solved by technology

Among them: (1) Although inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide have both flame-retardant and smoke-suppressing effects and do not produce toxic and corrosive gases when burned, they are seriously affected due to the large amount of addition required. Physical, mechanical properties and processing properties of flame retardant materials

(2) Although organic halogen-based flame retardants have the characteristics of high flame retardant efficiency and high cost performance, their application fields have been limited because HX, which acts as a flame retardant, is a toxic and corrosive gas that is harmful to the environment and human body. , has gradually been eliminated

(3) Halogen-free flame retardant (IFR) has the advantages of low smoke and non-toxicity. IFR uses phosphorus, nitrogen, and carbon as the main core components, and it will produce a synergistic flame retardant effect when heated; the compounded IFR is usually made of polyphosphoric acid Ammonium (APP) is the acid source, melamine and / or dicyandiamide (MEL) is used as the foaming agent, and pentaerythritol (PER) is used as the carbon forming agent, which can form a uniform and dense carbon foam layer when subjected to high heat, which can be used for heat insulation , Oxygen barrier, smoke suppression, anti-melt droplet, has good flame retardant properties; but most of these flame retardants are hydrophilic, poor compatibility with polymer substrates, and require a large amount of addition , which affects the physical properties of flame-retardant polymer materials, so it cannot meet the needs of polymer materials

In addition to endowing the substrate with excellent flame retardant properties, organosilicon flame retardants can also improve the processing performance and heat resistance of the substrate; however, due to the high price, the application is also limited

[0004] According to British "Polymer Degradation and Stability" (Polymer Degradation and Stability, 90:523-534, 2005), adding 40% of the total mass of the system is composed of melamine and / or dicyandiamide ammonium sulfate and pentaerythritol. The prepared flame-retardant polypropylene can reach the UL-94V0 level, but due to the large amount of added expansion flame retardant, the mechanical properties of the material such as tensile strength and breaking strength will decrease

[0005] According to the introduction of the American Journal of Polymer Science, part A: Polymer chemistry 42:6163-6173, 2004, when the organic montmorillonite and the intumescent flame retardant synergistically flame-retardant polypropylene, when the organic When the mass of montmorillonite accounts for 4% of the total mass of the system, the heat release rate of flame-retardant polypropylene can be significantly reduced; The flame retardant effect is reduced

[0006] In addition, although the flame retardant polymers containing nitrogen and phosphorus intumescent flame retardants or nitrogen and phosphorus intumescent flame retardants and flame retardant synergists prepared by the melt blending method have the characteristics of low smoke, non-toxicity and resistance to solvent droplets, However, the flame retardant effect is still not ideal, and the drop resistance needs to be improved, and the mechanical properties of the material such as tensile strength and breaking strength will decrease due to the large amount of flame retardant added, and the production cost is relatively high.