Flame retardant core material of aluminum-plastic panel and aluminum-plastic panel

Abstract

The present invention relates to the technical field of building materials, and in particular to a flame retardant core material of an aluminum-plastic plate and an aluminum-plastic plate. The flame retardant core material of the aluminum-plastic plate comprises, by weight, 35 to 50 parts of a base material, 30 to 40 parts of magnesium hydroxide, 6 to 11 parts of a synergist, 0.5 to 3 parts of a dispersant, 2 to 3 parts of a coupling agent, 0.5 to 1 part of an antioxidant, 1 to 2 parts of a compatibilizer, and 6 to 10 parts of an inorganic filler; the synergist comprises a phosphate flame retardant and zinc borate. The flame retardant core material of the aluminum-plastic plate of the present invention forms a ternary flame retardant system with magnesium hydroxide, phosphate flame retardant and zinc borate, which can effectively improve the flame retardant performance, reduce the amount of magnesium hydroxide used, and maintain the strength of the core material.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a flame-retardant core material of an aluminum-plastic plate and an aluminum-plastic plate. Background Art

[0002] Aluminum-plastic panel is a material used for building decoration; because the core material of aluminum-plastic panel is made of polymer material, the traditional aluminum-plastic panel has a certain degree of flammability. With the continuous improvement of people's fire awareness, people have higher and higher requirements for the fire resistance of building decoration materials. In order to improve the fire resistance of aluminum-plastic panel, people often add a large amount of flame retardant in the preparation of core material, so as to play a flame retardant role. There are many types of flame retardants, among which metal hydroxides, such as magnesium hydroxide and aluminum hydroxide, are relatively cheap and widely used. Although the above two flame retardants have flame retardant properties, they must be added in large quantities to the core material to achieve sufficient flame retardant effect. However, if they are added in large quantities, the strength index of the core material will decrease. If other types of flame retardants are used instead, there will be problems such as high prices and reduced product competitiveness.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a flame retardant core material of an aluminum-plastic plate and an aluminum-plastic plate, aiming to solve the technical problem in the prior art that excessive addition of flame retardant leads to a decrease in the strength index of the core material.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The invention provides a flame retardant core material of an aluminum-plastic plate, which comprises, by weight, 35-50 parts of a base material, 30-40 parts of magnesium hydroxide, 6-11 parts of a synergist, 0.5-3 parts of a dispersant, 2-3 parts of a coupling agent, 0.5-1 parts of an antioxidant, 1-2 parts of a compatibilizer, and 6-10 parts of an inorganic filler; the synergist comprises a phosphate flame retardant and zinc borate.

[0007] The flame retardant core material of the aluminum-plastic plate, wherein the phosphate flame retardant includes at least one of tripolyphosphate, hexaphosphate, metaphosphate and polyphosphate.

[0008] The flame-retardant core material of the aluminum-plastic plate, wherein the mass ratio of the magnesium hydroxide, the phosphate flame retardant and the zinc borate is (12-13):(1-2):1.

[0009] The flame-retardant core material of the aluminum-plastic plate, wherein the synergist comprises metaphosphate and zinc borate; and the mass ratio of the magnesium hydroxide, metaphosphate and zinc borate is 12:2:1.

[0010] The flame-retardant core material of the aluminum-plastic plate, wherein the base material comprises at least two of linear low-density polyethylene, polyphenylene ether, ethylene-octene copolymer and ethylene-ethyl acrylate copolymer.

[0011] The flame-retardant core material of the aluminum-plastic plate, wherein the weight ratio of the linear low-density polyethylene, polyphenylene ether, ethylene-octene copolymer and ethylene-ethyl acrylate copolymer is 5:2:2:1.

[0012] The flame-retardant core material of the aluminum-plastic plate, wherein the coupling agent includes at least one of a titanate coupling agent, a phosphate coupling agent and a silane coupling agent.

[0013] The flame-retardant core material of the aluminum-plastic plate, wherein the dispersant includes sodium sulfate of fatty alcohol polyoxyethylene ether or ammonium sulfate of fatty alcohol polyoxyethylene ether; and the compatibilizer includes maleic anhydride grafted polypropylene.

[0014] The flame-retardant core material of the aluminum-plastic plate, wherein the inorganic filler includes calcium oxide; and the antioxidant includes at least one of antioxidant 1010 and antioxidant 168.

[0015] A second aspect of the present invention provides an aluminum-plastic panel, comprising a core layer and aluminum metal plates arranged on both sides of the core layer; the core layer adopts the aluminum-plastic panel flame-retardant core material as described above.

[0016] Beneficial effect: The present invention provides a flame retardant core material of an aluminum-plastic plate, wherein the flame retardant core material of the aluminum-plastic plate comprises a ternary flame retardant system composed of magnesium hydroxide, a phosphate flame retardant and zinc borate, which reduces the overall amount of the flame retardant and enables the flame retardant core material of the aluminum-plastic plate to have better flame retardant and fireproof properties. DETAILED DESCRIPTION

[0017] The present invention provides a flame retardant core material of an aluminum-plastic plate and an aluminum-plastic plate. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail by taking the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] The present invention provides a flame retardant core material of an aluminum-plastic plate, which comprises, by weight, 35 to 50 parts of a base material, 30 to 40 parts of magnesium hydroxide, 6 to 11 parts of a synergist, 0.5 to 3 parts of a dispersant, 2 to 3 parts of a coupling agent, 0.5 to 1 part of an antioxidant, 1 to 2 parts of a compatibilizer, and 6 to 10 parts of an inorganic filler; the synergist comprises a phosphate flame retardant and zinc borate. Magnesium hydroxide, phosphate flame retardant, and zinc borate have different flame retardant mechanisms, and the ternary flame retardant system formed can play a flame retardant role in a variety of ways. When the three are used in coordination, the use of magnesium hydroxide can be effectively reduced.

[0019] Preferably, the phosphate flame retardant includes at least one of tripolyphosphate, hexaphosphate, metaphosphate, and polyphosphate. Among them, tripolyphosphate (TPP) has excellent high temperature resistance and flame retardant properties, and is used in small amounts, low in cost, and easy to use. Hexaphosphate (HP6) is a new type of phosphate flame retardant that has been widely used in recent years. Compared with TPP, it has better flame retardant properties and thermal stability, especially for polymer materials such as PC. At the same time, hexaphosphate (HP6) also has excellent properties such as smoke suppression. Metaphosphate (APP) is a hydrolyzable phosphate flame retardant with excellent flame retardant properties, smoke suppression properties, and thermal stability. Polyphosphate (PPP) is a kaolin / polyphosphate composite material. It has good flame retardant properties, thermal stability, mechanical properties, electrical properties, etc.

[0020] Preferably, the mass ratio of the magnesium hydroxide, the phosphate flame retardant and the zinc borate is (12-13):(1-2):1.

[0021] Preferably, the synergist comprises metaphosphate and zinc borate, and the mass ratio of the magnesium hydroxide, metaphosphate and zinc borate is 12:2:1. When the flame retardant and the synergist are in this ratio, the flame retardant performance of the flame retardant core material of the aluminum-plastic panel is the best.

[0022] Preferably, the substrate comprises at least two of linear low-density polyethylene, polyphenylene ether, ethylene-octene copolymer and ethylene-ethyl acrylate copolymer.

[0023] Among them, low-density polyethylene is cheap and is the preferred component for reducing the cost and weight of the core material. Linear low-density polyethylene has a high softening temperature and melting temperature, and has the advantages of high strength, good toughness, high rigidity, good heat resistance and cold resistance. It also has good resistance to environmental stress cracking, impact strength, tear strength and other properties. Polyphenylene ether is a high-strength engineering plastic that can improve the strength of the core material. In addition, it has good flame retardancy and can reduce the amount of flame retardant added. Ethylene-octene copolymer (POE) has excellent physical and mechanical properties such as elasticity, impact strength, tear strength and elongation. Ethylene-ethyl acrylate copolymer (EEA) has good flexibility, thermal stability and processability, and its resistance to environmental stress cracking, impact resistance, bending fatigue resistance and low temperature are better than low-density polyethylene.

[0024] Preferably, the weight ratio of the linear low-density polyethylene, polyphenylene ether, ethylene-octene copolymer and ethylene-ethyl acrylate copolymer is 5:2:2:1.

[0025] Preferably, the coupling agent includes at least one of a titanate coupling agent, a phosphate coupling agent and a silane coupling agent.

[0026] Preferably, the dispersant includes sodium fatty alcohol polyoxyethylene ether sulfate or ammonium fatty alcohol polyoxyethylene ether sulfate; and the compatibilizer includes maleic anhydride grafted polypropylene.

[0027] Preferably, the inorganic filler includes calcium oxide; the antioxidant includes at least one of antioxidant 1010 and antioxidant 168. Antioxidant 1010 can effectively prevent thermal oxidation degradation of polymer materials during long-term aging, and is also a highly effective processing stabilizer that can improve the discoloration resistance of polymer materials under high-temperature processing conditions. Antioxidant 1010 and antioxidant 168 have a synergistic effect.

[0028] A second aspect of the present invention provides an aluminum-plastic panel, comprising a core layer and aluminum metal plates arranged on both sides of the core layer; the core layer adopts the aluminum-plastic panel flame-retardant core material as described above.

[0029] The present invention is further described with reference to the following examples.

[0030] Example 1

[0031] A flame retardant core material of an aluminum-plastic plate, comprising, by weight, 42 parts of a base material, 36 parts of magnesium hydroxide, 9 parts of a synergist, 1.5 parts of a dispersant, 2.7 parts of a coupling agent, 0.8 parts of an antioxidant, 1 part of a compatibilizer, and 7 parts of an inorganic filler;

[0032] The synergist is composed of 6 parts of phosphate flame retardant and 3 parts of zinc borate; the phosphate flame retardant is metaphosphate;

[0033] The substrate is composed of 21 parts of linear low-density polyethylene, 8.4 parts of polyphenylene ether, 8.4 parts of ethylene-octene copolymer and 4.2 parts of ethylene-ethyl acrylate copolymer;

[0034] The dispersant is sodium fatty alcohol polyoxyethylene ether sulfate; the coupling agent is a phosphate coupling agent; the antioxidant consists of antioxidant 1010 and antioxidant 168; the compatibilizer is maleic anhydride grafted polypropylene; and the inorganic filler is calcium oxide.

[0035] Example 2

[0036] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the phosphate flame retardant is tripolyphosphate.

[0037] Example 3

[0038] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the phosphate flame retardant is hexaphosphate.

[0039] Example 4

[0040] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the phosphate flame retardant is polyphosphate.

[0041] Example 5

[0042] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the amounts of magnesium hydroxide, synergist and dispersant are different;

[0043] In this embodiment, the amount of magnesium hydroxide is 38.5 parts, the amount of the synergist is 6.6 parts, and the amount of the dispersant is 1.4 parts;

[0044] The synergist consists of 3.3 parts of zinc borate and 3.3 parts of metaphosphate.

[0045] Example 6

[0046] A flame retardant core material of an aluminum-plastic plate, comprising, by weight, 50 parts of a base material, 30 parts of magnesium hydroxide, 8.5 parts of a synergist, 1.4 parts of a dispersant, 2 parts of a coupling agent, 0.8 parts of an antioxidant, 1 part of a compatibilizer, and 6.3 parts of an inorganic filler;

[0047] The synergist is composed of 6 parts of phosphate flame retardant and 3 parts of zinc borate; the phosphate flame retardant is metaphosphate;

[0048] The substrate is composed of 25 parts of linear low-density polyethylene, 10 parts of polyphenylene ether, 10 parts of ethylene-octene copolymer and 5 parts of ethylene-ethyl acrylate copolymer;

[0049] The dispersant is sodium fatty alcohol polyoxyethylene ether sulfate; the coupling agent is a phosphate coupling agent;

[0050] The antioxidant consists of antioxidant 1010 and antioxidant 168; the compatibilizer is maleic anhydride grafted polypropylene; and the inorganic filler is calcium oxide.

[0051] Example 7

[0052] A flame retardant core material of an aluminum-plastic plate, comprising, by weight, 35 parts of a base material, 40 parts of magnesium hydroxide, 10 parts of a synergist, 1.2 parts of a dispersant, 2 parts of a coupling agent, 0.8 parts of an antioxidant, 1 part of a compatibilizer, and 10 parts of an inorganic filler;

[0053] The synergist is composed of 5 parts of phosphate flame retardant and 5 parts of zinc borate; the phosphate flame retardant is metaphosphate;

[0054] The substrate is composed of 17.5 parts of linear low-density polyethylene, 7 parts of polyphenylene ether, 7 parts of ethylene-octene copolymer and 3.5 parts of ethylene-ethyl acrylate copolymer;

[0055] The dispersant is sodium fatty alcohol polyoxyethylene ether sulfate; the coupling agent is a phosphate coupling agent;

[0056] The antioxidant consists of antioxidant 1010 and antioxidant 168; the compatibilizer is maleic anhydride grafted polypropylene; and the inorganic filler is calcium oxide.

[0057] Example 8

[0058] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the composition formula of the base material is different;

[0059] In this embodiment, the substrate is composed of 15 parts of linear low-density polyethylene, 10.4 parts of polyphenylene ether, 12.4 parts of ethylene-octene copolymer and 4.2 parts of ethylene-ethyl acrylate copolymer.

[0060] Example 9

[0061] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the composition formula of the base material is different;

[0062] In this embodiment, the substrate is composed of 30 parts of linear low-density polyethylene, 4.4 parts of polyphenylene ether, 3.4 parts of ethylene-octene copolymer and 4.2 parts of ethylene-ethyl acrylate copolymer.

[0063] Comparative Example 1

[0064] A flame retardant core material of an aluminum-plastic plate, comprising, by weight, 36 parts of a base material, 42 parts of magnesium hydroxide, 6 parts of a synergist, 1.5 parts of a dispersant, 2.7 parts of a coupling agent, 0.8 parts of an antioxidant, 1 part of a compatibilizer, and 10 parts of an inorganic filler;

[0065] The synergist is composed of 4 parts of phosphate flame retardant and 2 parts of zinc borate; the phosphate flame retardant is metaphosphate;

[0066] The substrate is composed of 18 parts of linear low-density polyethylene, 7.2 parts of polyphenylene ether, 7.2 parts of ethylene-octene copolymer and 3.6 parts of ethylene-ethyl acrylate copolymer;

[0067] The dispersant is sodium fatty alcohol polyoxyethylene ether sulfate; the coupling agent is a phosphate coupling agent; the antioxidant consists of antioxidant 1010 and antioxidant 168; the compatibilizer is maleic anhydride grafted polypropylene; and the inorganic filler is calcium oxide.

[0068] Comparative Example 2

[0069] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the synergist is zinc borate.

[0070] Comparative Example 3

[0071] A flame retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the synergist is a metaphosphate ester.

[0072] Comparative Example 4

[0073] A flame retardant core material of an aluminum-plastic plate, comprising, by weight, 32 parts of a base material, 44 parts of magnesium hydroxide, 9 parts of a synergist, 1.5 parts of a dispersant, 2.7 parts of a coupling agent, 0.8 parts of an antioxidant, 1 part of a compatibilizer, and 9 parts of an inorganic filler;

[0074] The synergist is composed of 6 parts of phosphate flame retardant and 3 parts of zinc borate; the phosphate flame retardant is metaphosphate;

[0075] The substrate is composed of 16 parts of linear low-density polyethylene, 6.4 parts of polyphenylene ether, 6.4 parts of ethylene-octene copolymer and 3.2 parts of ethylene-ethyl acrylate copolymer;

[0076] The dispersant is sodium fatty alcohol polyoxyethylene ether sulfate; the coupling agent is a phosphate coupling agent;

[0077] The antioxidant consists of antioxidant 1010 and antioxidant 168; the compatibilizer is maleic anhydride grafted polypropylene; and the inorganic filler is calcium oxide.

[0078] Comparative Example 5

[0079] A flame retardant core material of an aluminum-plastic plate, comprising, by weight, 53 parts of a base material, 28 parts of magnesium hydroxide, 6 parts of a synergist, 1.5 parts of a dispersant, 2.7 parts of a coupling agent, 0.8 parts of an antioxidant, 1 part of a compatibilizer, and 7 parts of an inorganic filler;

[0080] The synergist is composed of 4 parts of phosphate flame retardant and 2 parts of zinc borate; the phosphate flame retardant is metaphosphate;

[0081] The substrate is composed of 26.5 parts of linear low-density polyethylene, 10.6 parts of polyphenylene ether, 10.6 parts of ethylene-octene copolymer and 2.8 parts of ethylene-ethyl acrylate copolymer;

[0082] The dispersant is sodium fatty alcohol polyoxyethylene ether sulfate; the coupling agent is a phosphate coupling agent;

[0083] The antioxidant consists of antioxidant 1010 and antioxidant 168; the compatibilizer is maleic anhydride grafted polypropylene; and the inorganic filler is calcium oxide.

[0084] Comparative Example 6

[0085] A flame-retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the composition formula of the substrate is different; in this comparative example, the substrate is composed of 21 parts of low-density polyethylene, 8.4 parts of polyphenylene ether, 8.4 parts of ethylene-octene copolymer and 4.2 parts of ethylene-ethyl acrylate copolymer.

[0086] Comparative Example 7

[0087] A flame-retardant core material of an aluminum-plastic plate, which differs from Example 1 in that the composition formula of the substrate is different; in this comparative example, the substrate is composed of 21 parts of low-density polyethylene, 8.4 parts of polyphenylene ether, 8.4 parts of ethylene-octene copolymer and 4.2 parts of ethylene-ethyl acrylate copolymer.

[0088] The strength of the flame retardant core material of the aluminum-plastic plate of each embodiment and comparative example was measured, wherein the tensile strength (MPa) was tested in accordance with GB / T1040.2-2006; and the bending strength (MPa) was tested in accordance with GB / T8812.2-2007.

[0089] The flame retardant properties of the aluminum-plastic panels made of the flame retardant core materials of the aluminum-plastic panels of the embodiments and comparative examples were measured, wherein the test of the remaining length of combustion was carried out with reference to GB / T8625-1988; the average smoke temperature was carried out with reference to GB / T8625-1988; and the smoke density level was carried out with reference to GB / 8627-1999.

[0090] The corresponding test results are as follows:

[0091] Table 1

[0092] Tensile strength(MPa) Bending strength(MPa) Example 1 24.2 24.8 Example 2 23.7 24.3 Example 3 22.5 23.6 Example 4 22.9 23.2 Example 5 24.4 24.9 Example 6 24.9 25.6 Example 7 21.9 22.8 Example 8 23.6 24.2 Example 9 21.6 22.8 Comparative Example 1 17.1 18.2 Comparative Example 2 24.0 24.6 Comparative Example 3 24.2 24.5 Comparative Example 4 15.7 17.5 Comparative Example 5 26.1 27.3 Comparative Example 6 19.7 21.5 Comparative Example 7 18.7 20.5

[0093] Table 2

[0094]

[0095]

[0096] From the above results, it can be seen that the tensile strength of the flame-retardant core material of the aluminum-plastic panel prepared in the embodiment of the present invention is above 21MPa, and the bending strength is above 22MPa, which is good in strength. The aluminum-plastic panel further prepared has a minimum value of the remaining length after burning> 200mm, an average value of the remaining length after burning> 350m, and a smoke temperature of ≤125℃. Among them, the smoke density level of Example 1 is ≤15, which generally meets the A-level requirements.

[0097] Compared with Example 1, Comparative Example 1 uses a larger amount of flame retardant and a smaller amount of substrate. Although its flame retardant performance is better, the strength of the core material is significantly reduced.

[0098] Compared with Example 1, the synergist of Comparative Example 2 is only zinc borate, and the flame retardant performance has been significantly reduced. Compared with Example 1, the synergist of Comparative Example 3 is only metaphosphate, and the flame retardant performance has also been significantly reduced. This shows that the flame retardant effect of the ternary flame retardant system is better than that of the binary flame retardant system.

[0099] Compared with Example 1, in Comparative Example 4, the amount of substrate used is less, the amount of flame retardant used is more, and the strength of the core material obtained decreases significantly.

[0100] Compared with Example 1, Comparative Example 5 uses a larger amount of base material and a smaller amount of flame retardant. From the test results, although the strength of the core material is better, the flame retardant performance is significantly reduced.

[0101] Compared with Example 1, in Comparative Example 6, low-density polyethylene was used to replace linear low-density polyethylene. From the results, the strength of the core material decreased significantly, indicating that the use of linear low-density polyethylene helps to improve the strength of the core material.

[0102] Compared with Example 1, Comparative Example 7 does not use polyphenylene ether. From the results, the strength of the core material and the flame retardant properties of the aluminum-plastic panel are reduced to a certain extent, reflecting that the use of polyphenylene ether can improve the flame retardant properties and strength of the core material.

[0103] Further comparison of Examples 1-4 revealed that among the four phosphate flame retardants, the ternary flame retardant system using metaphosphate ester had the best effect.

[0104] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A flame retardant core material of an aluminum-plastic plate, characterized in that: Calculated by weight, it includes 35-50 parts of base material, 30-40 parts of magnesium hydroxide, 6-11 parts of synergist, 0.5-3 parts of dispersant, 2-3 parts of coupling agent, 0.5-1 part of antioxidant, 1-2 parts of compatibilizer and 6-10 parts of inorganic filler; the synergist includes phosphate flame retardant and zinc borate.

2. The flame retardant core material of the aluminum-plastic plate according to claim 1, characterized in that: The phosphate flame retardant includes at least one of tripolyphosphate, hexaphosphate, metaphosphate and polyphosphate.

3. The flame retardant core material of the aluminum-plastic plate according to claim 2, characterized in that: The mass ratio of the magnesium hydroxide, the phosphate flame retardant and the zinc borate is (12-13):(1-2):

1.

4. The flame retardant core material of the aluminum-plastic plate according to claim 3, characterized in that: The synergist includes metaphosphate and zinc borate; the mass ratio of the magnesium hydroxide, metaphosphate and zinc borate is 12:2:

1.

5. The flame retardant core material of the aluminum-plastic plate according to claim 1, characterized in that: The substrate includes at least two of linear low-density polyethylene, polyphenylene ether, ethylene-octene copolymer, and ethylene-ethyl acrylate copolymer.

6. The flame retardant core material of the aluminum-plastic plate according to claim 5, characterized in that: The weight ratio of the linear low-density polyethylene, polyphenylene ether, ethylene-octene copolymer and ethylene-ethyl acrylate copolymer is 5:2:2:

1.

7. The flame retardant core material of the aluminum-plastic plate according to claim 1, characterized in that: The coupling agent includes at least one of a titanate coupling agent, a phosphate coupling agent and a silane coupling agent.

8. The flame retardant core material of the aluminum-plastic plate according to claim 1, characterized in that: The dispersant includes sodium sulfate of fatty alcohol polyoxyethylene ether or ammonium sulfate of fatty alcohol polyoxyethylene ether; and the compatibilizer includes maleic anhydride grafted polypropylene.

9. The flame retardant core material of the aluminum-plastic plate according to claim 1, characterized in that: The inorganic filler includes calcium oxide; and the antioxidant includes at least one of the antioxidant 1010 and the antioxidant 168 .

10. An aluminum-plastic panel, characterized in that: It includes a core layer and aluminum metal plates arranged on both sides of the core layer; The core layer adopts the flame-retardant core material of the aluminum-plastic plate as described in any one of claims 1-9.

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