Novel flame-retardant formula for aviation floor beam anti-corrosion adhesive tape

Abstract

The invention discloses a novel flame-retardant formula for an aviation floor beam anti-corrosion adhesive tape, and relates to the technical field of high polymer materials, the formula adopts a mode of combining a double-powder flame retardant and a phosphorus flame retardant, the double-powder flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and the phosphorus flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide. The mass ratio of aluminum hydroxide to magnesium hydroxide is (1: 0.5)-(1: 2), so that the high flame-retardant requirement of aviation is met, the elasticity and viscosity of the polyurethane adhesive tape are maintained, the flame-retardant effect is ensured, and the problems that gel becomes oil and hardens due to excessive plasticization and the adhesive tape loses viscosity due to excessive powder are solved; the service life and the reliability of the polyurethane adhesive tape are improved. The polyurethane adhesive tape prepared according to the formula meets the aviation 12S vertical combustion requirement, is suitable for corrosion prevention and sealing requirements of aviation floor beams, is excellent in flame retardant property, physical property, environmental protection property, cost benefit and the like, and has remarkable technical innovation significance and practical application value.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to a novel flame retardant formula for an aviation floor beam anti-corrosion tape. Background Art

[0002] Aviation polyurethane anti-corrosion tape is a key material widely used in the interior of civil aircraft cabins. Its main functions include providing elastic support, anti-corrosion protection, and meeting strict flame retardant requirements. In the current tape flame retardant technology, common flame retardants mainly include single phosphate type phosphorus flame retardants and aluminum hydroxide flame retardants. However, both flame retardants have obvious disadvantages.

[0003] The use of a single phosphorus-based flame retardant will cause a significant plasticizing effect on polyurethane tape. If the plasticization is excessive, the polyurethane elastomer will gel and oil and become hard, which not only reduces the sealing effect of the tape, but may also pose a potential threat to the safety performance of the aircraft. On the other hand, if a single powder flame retardant (such as aluminum hydroxide) is used, although it can improve the flame retardant performance to a certain extent, excessive powder will cause the tape to powder during storage and use, and in severe cases, it will lose its viscosity, affecting the normal use of the tape.

[0004] In view of the problems existing in the existing technology, it is urgent to develop a new flame retardant formula that can meet the flame retardant requirements of polyurethane gel products without damaging the elasticity and viscosity of the product itself. This formula needs to be able to meet the aviation 12S vertical combustion requirements while maintaining the original physical properties of the tape, thereby ensuring the safety and reliability of the aircraft. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a new flame retardant formula for an aviation floor beam anti-corrosion tape to solve the problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A new flame retardant formula for aviation floor beam anti-corrosion tape, which adopts a combination of a double powder flame retardant and a phosphorus flame retardant, wherein the double powder flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and the mass ratio of aluminum hydroxide to magnesium hydroxide is 1:0.5 to 1:2, so as to meet the high flame retardancy requirements of aviation while maintaining the elasticity and viscosity of the polyurethane tape.

[0008] As a preferred technical solution of the present invention, the phosphorus-based flame retardant is a phosphate flame retardant, and its addition amount is 5% to 15% of the total weight of the polyurethane raw material to form a flame-retardant carbonized layer during combustion to improve the flame retardant effect.

[0009] As a preferred technical solution of the present invention, the polyurethane tape further comprises an anti-aging agent, the addition amount of which is 1% to 3% of the total weight of the polyurethane raw material, so as to improve the weather resistance and service life of the tape.

[0010] As a preferred technical solution of the present invention, the polyurethane tape also contains a plasticizer, the addition amount of which is 2% to 8% of the total weight of the polyurethane raw material to adjust the hardness and softness of the polyurethane, while avoiding gel oiling and hardening caused by excessive plasticization.

[0011] As a preferred technical solution of the present invention, the polyurethane tape is prepared by a specific production process, including the steps of mixing, extruding, molding and curing, so as to ensure uniform distribution of the flame retardant in the polyurethane substrate.

[0012] As a preferred technical solution of the present invention, the adhesive tape has excellent flame retardant properties and can meet the aviation 12S vertical combustion requirements.

[0013] As a preferred technical solution of the present invention, during the combustion process of the adhesive tape, magnesium hydroxide and aluminum hydroxide generate a large amount of water vapor, which combines with the flame-retardant carbonized layer formed by the phosphate to form an effective flame-retardant barrier.

[0014] As a preferred technical solution of the present invention, the adhesive tape also has good elasticity and viscosity, and can be tightly attached to the aviation floor beam to prevent the intrusion of moisture and corrosive substances.

[0015] As a preferred technical solution of the present invention, the adhesive tape has good anti-aging performance and can maintain stable performance and appearance during long-term use.

[0016] As a preferred technical solution of the present invention, the adhesive tape is suitable for the anti-corrosion and flame-retardant protection of the floor beams inside the cabin of civil aircraft, and has the characteristics of easy installation, corrosion resistance and excellent flame-retardant performance.

[0017] The present invention has the following benefits: By combining a double powder flame retardant (aluminum hydroxide + magnesium hydroxide) with a phosphorus flame retardant, the contradiction between the flame retardant performance and the physical properties of the polyurethane tape in the prior art is effectively resolved. Specifically, the beneficial effects of the present invention are mainly reflected in the following aspects: The flame retardant performance is significantly improved: By combining the double powder flame retardant and the phosphorus flame retardant, the formula of the present invention can form an effective flame retardant carbonization layer, significantly improve the flame retardant performance of the polyurethane tape, and meet the aviation 12S vertical combustion requirements.

[0018] Maintain the original physical properties of the tape: Compared with the prior art, the formula of the present invention improves the flame retardant properties while not damaging the elasticity and viscosity of the polyurethane tape. This ensures the normal use of the tape on the aircraft and improves the safety and reliability of the aircraft. Reduce environmental pollution: Traditional flame retardants may release harmful substances during use and pollute the environment. The flame retardant used in the formula of the present invention has lower toxicity and less impact on the environment, meeting modern environmental protection requirements. Wide range of applications: The formula of the present invention is not only suitable for anti-corrosion tapes for aviation floor beams, but can also be widely used in other polyurethane products that need to have both flame retardant properties and physical properties. It has high market value and application prospects.

[0019] In summary, the present invention provides a new flame retardant formula for aviation floor beam anti-corrosion tape having both flame retardant properties and physical properties, which has significant technical advantages and practical application value. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example 1, a new flame retardant formula for aviation floor beam anti-corrosion tape, the formula adopts a combination of a double powder flame retardant and a phosphorus flame retardant, wherein the double powder flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and the mass ratio of aluminum hydroxide to magnesium hydroxide is 1:0.5 to 1:2, so as to meet the high flame retardancy requirements of aviation while maintaining the elasticity and viscosity of the polyurethane tape.

[0022] The phosphorus-based flame retardant is a phosphate flame retardant, and the added amount thereof is 5% to 15% of the total weight of the polyurethane raw material, so as to form a flame-retardant carbonized layer during the combustion process and improve the flame-retardant effect.

[0023] The polyurethane tape also contains an anti-aging agent, the addition amount of which is 1% to 3% of the total weight of the polyurethane raw material, so as to improve the weather resistance and service life of the tape.

[0024] The polyurethane tape also contains a plasticizer, the addition amount of which is 2% to 8% of the total weight of the polyurethane raw material, so as to adjust the hardness and softness of the polyurethane and avoid the phenomenon of gel oiling and hardening caused by excessive plasticization.

[0025] The polyurethane tape is prepared through a specific production process, including the steps of mixing, extruding, molding and curing, to ensure uniform distribution of the flame retardant in the polyurethane substrate.

[0026] The tape has excellent flame retardant properties and can meet the aviation 12S vertical combustion requirements.

[0027] During the combustion process of the tape, magnesium hydroxide and aluminum hydroxide generate a large amount of water vapor, which combines with the flame-retardant carbonized layer formed by the phosphate ester to form an effective flame-retardant barrier.

[0028] Formula composition: polyurethane raw material: 100 parts (mass parts); aluminum hydroxide: 20 parts; magnesium hydroxide: 10 parts (the mass ratio of aluminum hydroxide to magnesium hydroxide is 2:1); phosphate type phosphorus flame retardant: 10 parts (accounting for 10% of the total mass of polyurethane raw materials); other additives (such as anti-aging agents, plasticizers, etc.): appropriate amount.

[0029] Preparation steps: Mix polyurethane raw materials, aluminum hydroxide, magnesium hydroxide, phosphate-type phosphorus flame retardant and other additives in a formula ratio. Process the mixture into a polyurethane tape with a desired shape and thickness through an extruder or a coater. Perform performance tests on the processed polyurethane tape, including flame retardancy, elasticity, viscosity, etc.

[0030] Specifically, the formula uses aluminum hydroxide and magnesium hydroxide as dual-powder flame retardants. These two flame retardants release a large amount of water vapor during combustion, which helps to reduce the combustion temperature and thus achieve a flame retardant effect; at the same time, a phosphorus-based flame retardant of the phosphate type is also added to the formula. This flame retardant can form a carbonized layer during combustion, effectively isolating oxygen and further enhancing the flame retardant performance.

[0031] By precisely controlling the amount of flame retardant added, the formula ensures flame retardant effect while avoiding the negative impact of flame retardant on the elasticity and viscosity of polyurethane raw materials. The amount of magnesium hydroxide and aluminum hydroxide added is optimized so that there will be no excessive powder, thus maintaining the viscosity and elasticity of the tape; the formula may also contain anti-aging agents, which helps to improve the weather resistance and service life of the polyurethane tape, indirectly ensuring the long-term stability of the flame retardant effect and elasticity and viscosity.

[0032] This invention achieves a balance between flame retardant effect and elasticity and viscosity by comprehensively considering the type of flame retardant, the amount added and the interaction with other additives, meeting the high standards required for aviation floor beam anti-corrosion tape; combustion test verification: During the formula development process, multiple combustion tests may be carried out to verify its flame retardant properties, while monitoring the changes in elasticity and viscosity of the tape after combustion to ensure that the product meets the aviation 12S vertical combustion requirements.

[0033] Practical application effect: Through practical application tests, this formula can ensure that the polyurethane tape can maintain its original elasticity and viscosity while effectively improving its flame retardant properties to meet the special requirements of the aviation field.

[0034] Example 2, a new flame retardant formula for aviation floor beam anti-corrosion tape, the formula adopts a combination of a double powder flame retardant and a phosphorus flame retardant, wherein the double powder flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and the mass ratio of aluminum hydroxide to magnesium hydroxide is 1:0.5 to 1:2, so as to meet the high flame retardancy requirements of aviation while maintaining the elasticity and viscosity of the polyurethane tape.

[0035] The phosphorus-based flame retardant is a phosphate flame retardant, and the added amount thereof is 5% to 15% of the total weight of the polyurethane raw material, so as to form a flame-retardant carbonized layer during the combustion process and improve the flame-retardant effect.

[0036] The polyurethane tape also contains an anti-aging agent, the addition amount of which is 1% to 3% of the total weight of the polyurethane raw material, so as to improve the weather resistance and service life of the tape.

[0037] The polyurethane tape also contains a plasticizer, the addition amount of which is 2% to 8% of the total weight of the polyurethane raw material, so as to adjust the hardness and softness of the polyurethane and avoid the phenomenon of gel oiling and hardening caused by excessive plasticization.

[0038] The polyurethane tape is prepared through a specific production process, including the steps of mixing, extruding, molding and curing, to ensure uniform distribution of the flame retardant in the polyurethane substrate.

[0039] The tape has excellent flame retardant properties and can meet the aviation 12S vertical combustion requirements.

[0040] During the combustion process of the tape, magnesium hydroxide and aluminum hydroxide generate a large amount of water vapor, which combines with the flame-retardant carbonized layer formed by the phosphate ester to form an effective flame-retardant barrier.

[0041] The adhesive tape also has good elasticity and viscosity, and can be closely attached to the aviation floor beam to prevent the intrusion of moisture and corrosive substances.

[0042] The adhesive tape has good anti-aging performance and can maintain stable performance and appearance during long-term use.

[0043] The adhesive tape is suitable for the anti-corrosion and flame retardant protection of the floor beams inside the cabin of civil aircraft, and has the characteristics of easy installation, corrosion resistance and excellent flame retardant performance;

[0044] Formula composition: polyurethane raw material: 100 parts; aluminum hydroxide: 15 parts; magnesium hydroxide: 25 parts (the mass ratio of aluminum hydroxide to magnesium hydroxide is 3:5); phosphate type phosphorus flame retardant: 7.5 parts (accounting for 7.5% of the total mass of the polyurethane raw material), other additives: appropriate amount; the preparation steps are the same as Example 1.

[0045] During the implementation of the present invention, the polyurethane tape prepared by using the novel flame retardant formula proposed in the present invention has been tested for flame retardancy, and the flame retardancy meets the aviation 12S vertical combustion requirements, while maintaining good elasticity and viscosity. Compared with the prior art, the present invention effectively avoids the problems of gel oiling and hardening caused by excessive plasticization and tape loss of viscosity caused by excessive powder while ensuring the flame retardant effect, thereby improving the service life and reliability of the polyurethane tape.

[0046] In addition, the new flame retardant formula proposed by the present invention also has the following advantages: Good environmental protection: Both the double powder flame retardant and the phosphorus flame retardant are environmentally friendly flame retardants and will not cause harm to the environment and human health. Low cost: Compared with a single flame retardant, the formula of the present invention has a lower cost while achieving the same flame retardant effect, which is conducive to promotion and application. Wide scope of application: The new flame retardant formula of the present invention is not only suitable for anti-corrosion tapes for aviation floor beams, but can also be widely used in other polyurethane products that require flame retardant protection.

[0047] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description in the specification. The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0048] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0052] The embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures may refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention may be combined with each other.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new flame retardant formula for aviation floor beam anti-corrosion tape, characterized in that: The formula combines a dual-powder flame retardant with a phosphorus-based flame retardant, wherein the dual-powder flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and the mass ratio of aluminum hydroxide to magnesium hydroxide is 1:0.5 to 1:2, to meet the high flame retardancy requirements of aviation while maintaining the elasticity and viscosity of the polyurethane tape.

2. The novel flame retardant formula for the aviation floor beam anti-corrosion tape according to claim 1 is characterized in that: The phosphorus-based flame retardant is a phosphate flame retardant, and the added amount thereof is 5% to 15% of the total weight of the polyurethane raw material, so as to form a flame-retardant carbonized layer during the combustion process and improve the flame-retardant effect.

3. The novel flame retardant formula for the anti-corrosion tape for aviation floor beams according to claim 1 is characterized in that: The polyurethane tape also contains an anti-aging agent, the addition amount of which is 1% to 3% of the total weight of the polyurethane raw material, so as to improve the weather resistance and service life of the tape.

4. The novel flame retardant formula for the aviation floor beam anti-corrosion tape according to claim 1, characterized in that: The polyurethane tape also contains a plasticizer, the addition amount of which is 2% to 8% of the total weight of the polyurethane raw material, so as to adjust the hardness and softness of the polyurethane and avoid the phenomenon of gel oiling and hardening caused by excessive plasticization.

5. The novel flame retardant formula for the anti-corrosion tape for aviation floor beams according to claim 1 is characterized in that: The polyurethane tape is prepared through a specific production process, including the steps of mixing, extruding, molding and curing, to ensure uniform distribution of the flame retardant in the polyurethane substrate.

6. A novel flame retardant formula for an aviation floor beam anti-corrosion tape according to claim 4 or 5, characterized in that: The tape has excellent flame retardant properties and can meet the aviation 12S vertical combustion requirements.

7. The novel flame retardant formula for the anti-corrosion tape for aviation floor beams according to claim 6, characterized in that: During the combustion process of the tape, magnesium hydroxide and aluminum hydroxide generate a large amount of water vapor, which combines with the flame-retardant carbonized layer formed by the phosphate ester to form an effective flame-retardant barrier.

8. The novel flame retardant formula for the anti-corrosion tape for aviation floor beams according to claim 6, characterized in that: The adhesive tape also has good elasticity and viscosity, and can be closely attached to the aviation floor beam to prevent the intrusion of moisture and corrosive substances.

9. The novel flame retardant formula for the anti-corrosion tape for aviation floor beams according to claim 6, characterized in that: The adhesive tape has good anti-aging performance and can maintain stable performance and appearance during long-term use.

10. The novel flame retardant formula for the anti-corrosion tape for aviation floor beams according to claim 9, characterized in that: The adhesive tape is suitable for the anti-corrosion and flame-retardant protection of floor beams inside the cabin of civil aviation passenger aircraft, and has the characteristics of easy installation, corrosion resistance and excellent flame-retardant performance.