Lightweight secondary-processing-free top plate flame-retardant material for passenger car

Abstract

The invention relates to the technical field of flame-retardant materials, in particular to a light-weight secondary-processing-free top plate flame-retardant material for a passenger car. According to the invention, various flame retardants are used to generate a synergistic effect, the chemical stability, the mechanical strength and the electrical insulation property are relatively high, halogen free radicals are released at a high temperature, active free radicals in a combustion reaction are captured, a free radical chain reaction of combustion is inhibited, and a protective film is formed on the surface of the material to isolate air; the combustion temperature is reduced through an internal endothermic reaction, the coating is oxidized in a high-temperature state, the oxygen concentration in air is reduced, and a flame-retardant effect is achieved, titanium dioxide can make the coating have good covering power and decoration performance, calcium carbonate can increase the volume and thickness of the coating, and the mechanical strength and wear resistance of the coating are improved; the iron oxide yellow can endow the coating with specific colors and functions such as rust prevention and corrosion prevention, so that the flame retardant effect of the passenger car roof is improved, secondary processing is not needed, the mass of the passenger car roof is reduced, and the purpose of light weight is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of flame retardant materials, and specifically to a lightweight secondary processing-free roof flame retardant material for passenger cars. Background Art

[0002] The roof of a passenger car usually adopts a modular design and consists of a middle roof and side roofs on both sides. The middle roof is used to cover the air conditioning duct in the middle of the carriage, and the side roofs are used to cover the area between the rear cover of the luggage rack and the middle roof of the carriage. This design can not only effectively reduce the noise inside the vehicle, but also facilitate the maintenance of the air conditioning duct components.

[0003] However, some existing passenger car roofs are relatively heavy in use, which is not convenient for transportation. At the same time, they do not have a flame retardant effect. When a fire occurs, the passenger car roof is too large in volume and has a wide combustion area, which is likely to cause a large number of casualties. To prevent fires, it is necessary to perform secondary processing on the passenger car roof later to add fireproof materials, and the steps are cumbersome. For this reason, we propose a lightweight secondary processing-free roof flame retardant material for passenger cars to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a lightweight secondary processing-free roof flame retardant material for passenger cars to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A lightweight secondary processing-free roof flame retardant material for passenger cars, comprising the following components in parts by weight: 15-25 parts of antioxidant, 18-23 parts of glass fiber, 10-15 parts of flame retardant, 3-5 parts of flame retardant synergist, 4-6 parts of stabilizer, and 10-15 parts of fireproof coating.

[0006] Further preferably, the flame retardant material comprises the following components in parts by weight: 20 parts of antioxidant, 20 parts of glass fiber, 13 parts of flame retardant, 4 parts of flame retardant synergist, 5 parts of stabilizer, and 12 parts of fireproof coating.

[0007] Further preferably, the antioxidant is composed of a free radical inhibitor and a hydroperoxide decomposer in a mass ratio of 2:3. The free radical inhibitor includes the following components: 30-70% of diaryl secondary and 40-60% of p-phenylenediamine. The free radical inhibitor and hydroperoxide have good antioxidant effects.

[0008] Further preferably, the glass fiber is composed of silica, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide and potassium oxide in a mass ratio of 10:4:2:2:1:1. Silica improves the high chemical stability, heat resistance and mechanical strength of the glass fiber. Alumina improves the chemical stability, mechanical strength and electrical insulation performance of the glass fiber. Calcium oxide can reduce the melting point of the glass fiber and improve its water resistance and chemical stability. Boron oxide reduces the melting point and viscosity of the glass fiber. Magnesium oxide improves the chemical stability and heat resistance of the glass fiber. Sodium oxide and potassium oxide improve the heat resistance and chemical stability of the glass fiber.

[0009] Further preferably, the flame retardant is composed of decabromodiphenyl ether, decabromodiphenylethane, tetrabromobisphenol and chlorinated paraffin in a mass ratio of 5:2:2:1. Its flame retardant mechanism is to release halogen free radicals at high temperatures, capture the active free radicals in the combustion reaction, thereby inhibiting the free radical chain reaction of combustion. At the same time, the hydrogen halide released by decomposition has the property of being non-flammable, which can block oxygen and inhibit the combustion reaction.

[0010] Further preferably, the flame retardant synergist is composed of antimony trioxide, zinc borate and aluminum hydroxide in a mass ratio of 4:3:3. During the combustion period, antimony trioxide first melts, forms a protective film on the material surface to isolate air, reduces the combustion temperature through an internal endothermic reaction, and is oxidized at high temperatures to dilute the oxygen concentration in the air, thus playing a flame retardant role. Zinc borate begins to release crystal water at 300 °C. In the presence of halogen compounds, boron halide and zinc halide are generated, inhibiting and capturing free hydroxyl groups, preventing the combustion chain reaction; at the same time, a solid-phase covering layer is formed to isolate the surface air of combustion, prevent the flame from continuing to burn and can play a role in smoke elimination and arc extinction. Aluminum hydroxide is oxidized at high temperatures to dilute the oxygen concentration in the air, thus playing a flame retardant role.

[0011] Further preferably, the stabilizer is composed of lead stearate, antimony carboxylate and phosphite in a mass ratio of 5:1:1. Lead stearate has good lubricity and thermal stability. Antimony carboxylate has good thermal stability and weather resistance. Phosphite can be used in combination with the main stabilizer to improve the stabilization effect.

[0012] Further preferably, the fireproof coating is composed of titanium dioxide, calcium carbonate and iron oxide yellow in a mass ratio of 4:3:3. Titanium dioxide can make the coating have good covering power and decoration. Calcium carbonate can increase the volume and thickness of the coating, improve the mechanical strength and wear resistance of the coating. Iron oxide yellow can endow the coating with specific colors and functions, such as rust prevention and corrosion prevention.

[0013] A preparation method of a lightweight and secondary processing-free roof flame retardant material for buses comprises the following steps:

[0014] S1: Put the antioxidant, glass fiber, flame retardant, flame retardant synergist, stabilizer and fireproof coating into a blender and mix them. The rotation speed of the blender is 60 - 80 rpmb, the mixing time of the blender is 15 - 20 min, and the mixing temperature of the blender is 80 - 90 °C.

[0015] S2: Add the uniformly mixed materials into a kneader, knead for 10 - 12 min, and then extrude to obtain the lightweight flame retardant material.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses multiple types of flame retardants, which produce a synergistic effect, with high chemical stability, mechanical strength and electrical insulation performance. It releases halogen free radicals at high temperatures, captures the active free radicals in the combustion reaction, thereby inhibiting the free radical chain reaction of combustion, forms a protective film on the material surface to isolate air, reduces the combustion temperature through an internal endothermic reaction, is oxidized at high temperatures, dilutes the oxygen concentration in the air, and thus plays a flame retardant role. Titanium dioxide can make the coating have good covering power and decorative properties, calcium carbonate can increase the volume and thickness of the coating, improve the mechanical strength and wear resistance of the coating, and iron oxide yellow can endow the coating with specific colors and functions, such as rust prevention and corrosion prevention, etc., thereby increasing the flame retardant effect of the bus roof panel. At the same time, no secondary processing is required, reducing the quality of the bus roof panel and achieving the purpose of lightweight. Description of the Drawings

[0017] Figure 1 It is a process diagram for preparing the flame retardant material in the present invention. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment

[0020] Please refer to Figure 1 , the present invention provides a technical solution: A lightweight and non-secondary processed roof panel flame retardant material for buses, comprising the following components in parts by weight: 15 - 25 parts of antioxidant, 18 - 23 parts of glass fiber, 10 - 15 parts of flame retardant, 3 - 5 parts of flame retardant synergist, 4 - 6 parts of stabilizer, and 10 - 15 parts of fireproof coating.

[0021] In this embodiment, specifically: The components of the flame retardant material in parts by weight are: 20 parts of antioxidant, 20 parts of glass fiber, 13 parts of flame retardant, 4 parts of flame retardant synergist, 5 parts of stabilizer, and 12 parts of fireproof coating;

[0022] In this embodiment, specifically: the antioxidant is composed of a free radical inhibitor and a hydroperoxide decomposer in a mass ratio of 2:3. The free radical inhibitor includes the following components: 30-70% of diaryl secondary amine and 40-60% of p-phenylenediamine. The free radical inhibitor and the hydroperoxide have good antioxidant effects.

[0023] In this embodiment, specifically: the glass fiber is composed of silicon dioxide, aluminum oxide, calcium oxide, boron oxide, magnesium oxide, sodium oxide and potassium oxide in a mass ratio of 10:4:2:2:1:1. Silicon dioxide improves the high chemical stability, heat resistance and mechanical strength of the glass fiber. Aluminum oxide improves the chemical stability, mechanical strength and electrical insulation performance of the glass fiber. Calcium oxide can reduce the melting point of the glass fiber and improve its water resistance and chemical stability. Boron oxide reduces the melting point and viscosity of the glass fiber. Magnesium oxide improves the chemical stability and heat resistance of the glass fiber. Sodium oxide and potassium oxide improve the heat resistance and chemical stability of the glass fiber.

[0024] In this embodiment, specifically: the flame retardant is composed of decabromodiphenyl ether, decabromodiphenylethane, tetrabromobisphenol and chlorinated paraffin in a mass ratio of 5:2:2:1. Its flame retardant mechanism is to release halogen free radicals at high temperature, capture the active free radicals in the combustion reaction, thereby inhibiting the free radical chain reaction of combustion. At the same time, the hydrogen halide released by decomposition has the property of being non-flammable, which can block oxygen and inhibit the combustion reaction.

[0025] In this embodiment, specifically: the flame retardant synergist is composed of antimony trioxide, zinc borate and aluminum hydroxide in a mass ratio of 4:3:3. During the combustion period, antimony trioxide first melts, forms a protective film on the material surface to isolate air, reduces the combustion temperature through an internal endothermic reaction, is oxidized at high temperature, and dilutes the oxygen concentration in the air, thereby playing a flame retardant role. Zinc borate starts to release crystal water at 300°C. In the presence of halogen compounds, boron halide and zinc halide are generated, inhibiting and capturing free hydroxyl groups, preventing the combustion chain reaction; at the same time, a solid-phase covering layer is formed to isolate the surface air of the combustion, prevent the flame from continuing to burn and can play a role in smoke elimination and arc extinction. Aluminum hydroxide is oxidized at high temperature, diluting the oxygen concentration in the air, thereby playing a flame retardant role.

[0026] In this embodiment, specifically: the stabilizer is composed of lead stearate, antimony carboxylate and phosphite in a mass ratio of 5:1:1. Lead stearate has good lubricity and thermal stability. Antimony carboxylate has good thermal stability and weather resistance. Phosphite can be used in combination with the main stabilizer to improve the stabilization effect.

[0027] In this embodiment, specifically, the fireproof coating is composed of titanium dioxide, calcium carbonate and iron oxide yellow in a mass ratio of 4:3:3. Titanium dioxide can endow the coating with good covering power and decorative property. Calcium carbonate can increase the volume and thickness of the coating, and improve the mechanical strength and wear resistance of the coating. Iron oxide yellow can endow the coating with specific colors and functions, such as rust prevention and corrosion prevention.

[0028] A preparation method of a lightweight and secondary processing-free roof flame retardant material for passenger cars comprises the following steps:

[0029] S1: Put the antioxidant, glass fiber, flame retardant, flame retardant synergist, stabilizer and fireproof coating into a mixer for mixing and stirring. The rotation speed of the mixer is 60-80 rpmb, the stirring time of the mixer is 15-20 min, and the stirring temperature of the mixer is 80-90 °C.

[0030] S2: Add the uniformly mixed materials into a kneader for kneading for 10-12 min and then extrude to obtain the lightweight flame retardant material.

[0031] The present invention has the following advantages:

[0032] Using multiple types of flame retardants produces a synergistic effect. The antioxidant is composed of a free radical inhibitor and a hydroperoxide decomposer in a mass ratio of 2:3. The free radical inhibitor and hydroperoxide have good antioxidant effects. The glass fiber is composed of silica, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide, and potassium oxide in a mass ratio of 10:4:2:2:1:1, with high chemical stability, mechanical strength, and electrical insulation properties. Calcium oxide can lower the melting point of the glass fiber and improve its water resistance and chemical stability. Boron oxide reduces the melting point and viscosity of the glass fiber. Magnesium oxide improves the chemical stability and heat resistance of the glass fiber. Sodium oxide and potassium oxide improve the heat resistance and chemical stability of the glass fiber. The flame retardant is composed of decabromodiphenyl ether, decabromodiphenylethane, tetrabromobisphenol, and chlorinated paraffin in a mass ratio of 5:2:2:1. It releases halogen free radicals at high temperatures to capture the active free radicals in the combustion reaction, thus inhibiting the free radical chain reaction of combustion. At the same time, the hydrogen halide released by decomposition has the property of being non-flammable, which can block oxygen and inhibit the combustion reaction. The flame retardant synergist is composed of antimony trioxide, zinc borate, and aluminum hydroxide in a mass ratio of 4:3:3. During the combustion period, antimony trioxide first melts to form a protective film on the material surface to isolate air, reduces the combustion temperature through an internal endothermic reaction, is oxidized at high temperatures, and dilutes the oxygen concentration in the air, thus playing a flame retardant role. Zinc borate starts to release crystal water at 300°C. In the presence of halogen compounds, it generates boron halide and zinc halide, inhibits and captures free hydroxyl groups, and prevents the combustion chain reaction; at the same time, it forms a solid-phase covering layer to isolate the surface air of combustion, prevents the flame from continuing to burn, and can play a role in eliminating smoke and extinguishing arcs. Aluminum hydroxide is oxidized at high temperatures and dilutes the oxygen concentration in the air, thus playing a flame retardant role. The stabilizer is composed of lead stearate, carboxyantimony, and phosphite in a mass ratio of 5:1:1. Lead stearate has good lubricity and thermal stability. Carboxyantimony has good thermal stability and weather resistance. Phosphite can be used in combination with the main stabilizer to improve the stabilizing effect. The fireproof coating is composed of titanium dioxide, calcium carbonate, and iron oxide yellow in a mass ratio of 4:3:3. Titanium dioxide can make the coating have good covering power and decorative properties. Calcium carbonate can increase the volume and thickness of the coating, improve the mechanical strength and wear resistance of the coating. Iron oxide yellow can endow the coating with specific colors and functions, such as rust prevention and corrosion prevention, etc., thus increasing the flame retardant effect of the bus roof panel. At the same time, no secondary processing is required, reducing the quality of the bus roof panel and achieving the purpose of lightweighting.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightweight flame retardant material for a roof panel of a passenger car without secondary processing, characterized in that: The invention comprises the following components in parts by weight: 15 to 25 parts of antioxidant, 18 to 23 parts of glass fiber, 10 to 15 parts of flame retardant, 3 to 5 parts of flame retardant synergist, 4 to 6 parts of stabilizer and 10 to 15 parts of fire retardant coating.

2. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 1, characterized in that: The flame retardant material comprises the following components in parts by weight: 20 parts of antioxidant, 20 parts of glass fiber, 13 parts of flame retardant, 4 parts of flame retardant synergist, 5 parts of stabilizer and 12 parts of fire retardant coating.

3. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 1, characterized in that: The antioxidant is composed of a free radical inhibitor and a hydroperoxide decomposer in a mass ratio of 2:

3. The free radical inhibitor includes the following components: 30-70% of diaryl secondary and 40-60% of p-phenylenediamine. The free radical inhibitor and the hydroperoxide have good antioxidant effects.

4. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 1, characterized in that: The glass fiber is composed of silicon dioxide, aluminum oxide, calcium oxide, boron oxide, magnesium oxide, sodium oxide and potassium oxide in a mass ratio of 10:4:2:2:1:

1. Silicon dioxide improves the chemical stability, heat resistance and mechanical strength of the glass fiber, aluminum oxide improves the chemical stability, mechanical strength and electrical insulation performance of the glass fiber, calcium oxide can reduce the melting point of the glass fiber and improve the water resistance and chemical stability of the glass fiber, boron oxide reduces the melting point and viscosity of the glass fiber, magnesium oxide improves the chemical stability and heat resistance of the glass fiber, and sodium oxide and potassium oxide improve the heat resistance and chemical stability of the glass fiber.

5. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 2, characterized in that: The flame retardant is composed of decabromodiphenyl ether, decabromodiphenyl ethane, tetrabromobisphenol and chlorinated paraffin in a mass ratio of 5:2:2:

1. Its flame retardant mechanism is to release halogen free radicals at high temperatures to capture active free radicals in the combustion reaction, thereby inhibiting the free radical chain reaction of combustion. At the same time, the hydrogen halide released by decomposition has the property of being non-flammable, which can block oxygen and inhibit the combustion reaction.

6. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 2, characterized in that: The flame retardant synergist is composed of antimony trioxide, zinc borate and aluminum hydroxide in a mass ratio of 4:3:

3. During the combustion period, antimony trioxide melts first and forms a protective film on the surface of the material to isolate the air. The combustion temperature is reduced by an internal endothermic reaction. It is oxidized at high temperature to dilute the oxygen concentration in the air, thereby playing a flame retardant role. Zinc borate begins to release crystal water at 300°C. In the presence of halogen compounds, boron halides and zinc halides are generated to inhibit and capture free hydroxyl groups and prevent combustion chain reactions. At the same time, a solid phase covering layer is formed to isolate the burning surface air, prevent the flame from continuing to burn and play a role in smoke and arc extinguishing. Aluminum hydroxide is oxidized at high temperature to dilute the oxygen concentration in the air, thereby playing a flame retardant role.

7. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 2, characterized in that: The stabilizer is composed of lead stearate, antimony carboxylate and phosphite in a mass ratio of 5:1:

1. Lead stearate has good lubricity and thermal stability, antimony carboxylate has good thermal stability and weather resistance, and phosphite can be used in combination with the main stabilizer to improve the stabilizing effect.

8. The lightweight flame retardant material for a roof panel of a passenger car without secondary processing according to claim 2, characterized in that: Fire retardant coating is composed of titanium dioxide, calcium carbonate and yellow iron oxide in a mass ratio of 4:3:

3. Titanium dioxide can make the coating have good hiding power and decorative properties, calcium carbonate can increase the volume and thickness of the coating, improve the mechanical strength and wear resistance of the coating, and yellow iron oxide can give the coating specific color and functions, such as anti-rust and anti-corrosion.

9. The method for preparing a lightweight flame-retardant material for a roof panel of a passenger car without secondary processing according to claim 2, characterized in that: The steps include: S1: Put the antioxidant, glass fiber, flame retardant, flame retardant synergist, stabilizer and fire retardant coating into a mixer and mix them. The speed of the mixer is 60-80 rpmb, the stirring time of the mixer is 15-20 min, and the stirring temperature of the mixer is 80-90°C. S2: Add the uniformly mixed materials into a kneader, knead for 10 to 12 minutes, and then extrude to obtain a lightweight flame retardant material.

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