Flame-retardant fireproof rock wool board and preparation method thereof

Abstract

The invention relates to the technical field of rock wool boards, and provides a flame-retardant fireproof rock wool board and a preparation method thereof.The rock wool board is prepared from, by weight, 100 parts of basalt, 30-40 parts of slag, 10-20 parts of dolomite, 30-50 parts of aluminum hydroxide, 10-15 parts of iron ore and 5-10 parts of binder; the binder comprises aluminum sol dry powder and water-based phenolic resin in a weight ratio of (1-9): 1. By means of the technical scheme, the problems that in the prior art, a rock wool board is poor in flame retardant and fireproof performance and tensile strength are solved.

Description

Technical Field

[0001] The invention relates to the technical field of rock wool boards, and in particular to a flame retardant and fireproof rock wool board and a preparation method thereof. Background Art

[0002] As a new type of building material, rock wool board is widely used in building exterior wall insulation, roof insulation, industrial equipment insulation and other fields. It is mainly made of natural rocks such as basalt, etc. After high-temperature melting, it is made into inorganic fibers with the help of high-speed centrifugal equipment, and then organic binders are added, and it is made through molding, cutting and other processes.

[0003] With the improvement of fire safety awareness, the market has put forward more stringent requirements for the flame retardant and fireproof performance of rock wool boards. Although inorganic fibers have high stability at high temperatures, organic binders have poor flame retardant properties and often burn first when a fire occurs, thereby greatly weakening the overall flame retardant and fireproof properties of rock wool boards. In addition, the tensile strength of existing rock wool boards is poor, making it difficult to use them for a long time in harsh environments. Therefore, in order to better meet market demand, it is of great significance to develop a new type of flame retardant and fireproof rock wool board. Summary of the invention

[0004] The present invention provides a flame retardant and fireproof rock wool board and a preparation method thereof, which solves the problem of poor flame retardant and fireproof performance and tensile strength of the rock wool board in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a flame retardant and fireproof rock wool board, wherein the raw materials include the following components in parts by weight: 100 parts of basalt, 30-40 parts of slag, 10-20 parts of dolomite, 30-50 parts of aluminum hydroxide, 10-15 parts of iron ore, and 5-10 parts of a binder; The binder comprises aluminum sol dry powder and water-based phenolic resin in a weight ratio of 1 to 9:1.

[0006] As a further technical solution, the weight ratio of the aluminum sol dry powder to the water-based phenolic resin is 1-4:1.

[0007] In the present invention, when the weight ratio of the aluminum sol dry powder to the water-based phenolic resin is 1 to 4:1, it helps to further improve the tensile strength of the rock wool board.

[0008] As a further technical solution, the aluminum hydroxide is methyl MQ silicone resin modified aluminum hydroxide.

[0009] In the present invention, the inventors found that the flame retardant and fireproof performance of the rock wool board can be further improved by modifying aluminum hydroxide with methyl MQ silicone resin. It is speculated that methyl MQ silicone resin can make aluminum hydroxide better fill the inside of the rock wool board, thereby further improving the flame retardant and fireproof performance of the rock wool board.

[0010] As a further technical solution, the preparation method of the methyl MQ silicone resin modified aluminum hydroxide comprises the following steps: dissolving the methyl MQ silicone resin in xylene, adding aluminum hydroxide, dispersing evenly, and drying to obtain the methyl MQ silicone resin modified aluminum hydroxide.

[0011] As a further technical solution, in the methyl MQ silicone resin modified aluminum hydroxide, the weight ratio of methyl MQ silicone resin to aluminum hydroxide is 1:19~24.

[0012] In the present invention, when the weight ratio of methyl MQ silicone resin to aluminum hydroxide in the methyl MQ silicone resin modified aluminum hydroxide is 1:19-24, it helps to further improve the flame retardant and fireproof properties of the rock wool board.

[0013] As a further technical solution, the aluminum sol dry powder is a modified aluminum sol dry powder, and the components of the modified aluminum sol dry powder include zinc acetate and aluminum sol dry powder in a weight ratio of 1:4-9.

[0014] In the present invention, the inventors found that the tensile strength of the rock wool board can be further improved by modifying the aluminum sol dry powder with zinc acetate. It is speculated that the modified aluminum sol dry powder can react with the hydroxymethyl in the water-based phenolic resin, thereby further enhancing the ability of the rock wool board to resist external forces, thereby further improving the tensile strength of the rock wool board.

[0015] As a further technical solution, the preparation method of the modified aluminum sol dry powder comprises the following steps: dissolving the aluminum sol dry powder in water, adding zinc acetate, dispersing evenly, and dehydrating to obtain the modified aluminum sol dry powder.

[0016] The present invention also provides a method for preparing the flame retardant and fireproof rock wool board, comprising the following steps: S1, adding a binder into water to obtain a binder solution; S2, mixing basalt, slag, dolomite and iron ore, crushing, melting, spinning, adding the binder solution, and obtaining rock wool fibers; S3. Collect the rock wool fibers, add aluminum hydroxide, press, and solidify to obtain a flame retardant and fireproof rock wool board.

[0017] As a further technical solution, in step S1, the water content of the binder solution is 3wt%~5wt%.

[0018] As a further technical solution, in step S3, the temperature during curing is 180-200°C.

[0019] The working principle and beneficial effects of the present invention are: In the present invention, the binder includes aluminum sol dry powder and water-based phenolic resin. The compound use of organic and inorganic binders can enhance the bonding effect and improve the tensile strength of the rock wool board. On the other hand, the use of organic binders can be reduced, and the risk of organic binder combustion can be reduced, thereby improving the flame retardant and fireproof performance of the rock wool board. In addition, the addition of aluminum hydroxide as a flame retardant can also improve the flame retardant and fireproof performance of the rock wool board. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the following embodiments and comparative examples, unless otherwise specified, the content of silicon dioxide in the basalt is 45.2wt%, the content of silicon dioxide in the slag is 35.11wt%, the content of calcium oxide is 40.49wt%, the content of calcium oxide in the dolomite is 30.4wt%, the content of magnesium oxide is 21.9wt%, the particle size of aluminum hydroxide is 50μm, the iron content in the iron ore is 67.58wt%, the model of the aluminum sol dry powder is LA-30, purchased from Zibo Jinqi Chemical Technology Co., Ltd., the model of the water-based phenolic resin is HS-F101, purchased from Shandong Haoshun Chemical Co., Ltd., and the model of the methyl MQ silicone resin is SH-5204P.

[0022] Example 1 A method for preparing a flame retardant and fireproof rock wool board comprises the following steps: S1. By weight, 4.5 parts of aluminum sol dry powder and 0.5 parts of water-based phenolic resin were added to water to obtain a binder solution with a water content of 3 wt %; S2, 100 parts of basalt, 30 parts of slag, 10 parts of dolomite and 10 parts of iron ore are mixed, crushed, melted, spun, and a binder solution is added to obtain rock wool fibers; S3. Collect the above rock wool fibers, add 30 parts of aluminum hydroxide, press, and cure at 180° C. to obtain a flame retardant and fireproof rock wool board.

[0023] Example 2 A method for preparing a flame retardant and fireproof rock wool board comprises the following steps: S1. By weight, 9 parts of aluminum sol dry powder and 1 part of water-based phenolic resin were added to water to obtain a binder solution with a water content of 5wt%; S2, 100 parts of basalt, 40 parts of slag, 20 parts of dolomite and 15 parts of iron ore are mixed, crushed, melted, spun, and a binder solution is added to obtain rock wool fibers; S3. Collect the above rock wool fibers, add 50 parts of aluminum hydroxide, press, and cure at 200° C. to obtain a flame retardant and fireproof rock wool board.

[0024] Example 3 The only difference between this embodiment and embodiment 2 is that in this embodiment, in step S1, the weight parts of aluminum sol dry powder are 5 parts, and the weight parts of water-based phenolic resin are 5 parts.

[0025] Example 4 The only difference between this embodiment and embodiment 2 is that in this embodiment, in step S1, the weight parts of aluminum sol dry powder are 8 parts, and the weight parts of water-based phenolic resin are 2 parts.

[0026] Example 5 The only difference between this embodiment and embodiment 3 is that in this embodiment, the aluminum hydroxide is methyl MQ silicone resin modified aluminum hydroxide, and the preparation method of methyl MQ silicone resin modified aluminum hydroxide comprises the following steps: dissolving 1 part of methyl MQ silicone resin in 100 parts of xylene, adding 49 parts of aluminum hydroxide, dispersing evenly, and drying to obtain methyl MQ silicone resin modified aluminum hydroxide.

[0027] Example 6 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing methyl MQ silicone resin-modified aluminum hydroxide, the weight parts of methyl MQ silicone resin are 4 parts and the weight parts of aluminum hydroxide are 46 parts.

[0028] Example 7 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing methyl MQ silicone resin-modified aluminum hydroxide, the weight parts of methyl MQ silicone resin are 2.5 parts, and the weight parts of aluminum hydroxide are 47.5 parts.

[0029] Example 8 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing methyl MQ silicone resin-modified aluminum hydroxide, the weight parts of methyl MQ silicone resin are 2 parts and the weight parts of aluminum hydroxide are 48 parts.

[0030] Example 9 The only difference between this embodiment and embodiment 3 is that in this embodiment, the aluminum sol dry powder is a modified aluminum sol dry powder, and the preparation method of the modified aluminum sol dry powder includes the following steps: dissolving 4.9 parts of aluminum sol dry powder in 5 parts of water, adding 0.1 parts of zinc acetate, dispersing evenly, and dehydrating to obtain the modified aluminum sol dry powder.

[0031] Example 10 The only difference between this embodiment and embodiment 9 is that in this embodiment, when preparing the modified aluminum sol dry powder, the weight parts of the aluminum sol dry powder are 3.5 parts, and the weight parts of zinc acetate are 1.5 parts.

[0032] Embodiment 11 The only difference between this embodiment and embodiment 9 is that in this embodiment, when preparing the modified aluminum sol dry powder, the weight part of the aluminum sol dry powder is 4.5 parts, and the weight part of zinc acetate is 0.5 parts.

[0033] Example 12 The only difference between this embodiment and embodiment 9 is that, in this embodiment, when preparing the modified aluminum sol dry powder, the weight parts of the aluminum sol dry powder are 4 parts, and the weight part of zinc acetate is 1 part.

[0034] Comparative Example 1 The only difference between this comparative example and Example 1 is that in this comparative example, in step S1, 4.5 parts of aluminum sol dry powder and 0.5 parts of water-based phenolic resin are replaced by 5 parts of aluminum sol dry powder.

[0035] Comparative Example 2 The only difference between this comparative example and Example 1 is that in this comparative example, in step S1, 4.5 parts of aluminum sol dry powder and 0.5 parts of water-based phenolic resin are replaced by 5 parts of water-based phenolic resin.

[0036] Comparative Example 3 The only difference between this comparative example and Example 1 is that in this comparative example, no aluminum hydroxide is added.

[0037] Experimental Example 1 Flame retardant fire performance test ① Determination of total calorific value of combustion: The total calorific value of combustion of the rock wool boards prepared in Examples 1 to 8 and Comparative Examples 2 to 3 was tested with reference to GB / T 14402-2007 "Determination of combustion calorific value of combustion performance of building materials and products", and the average value of the results of the three samples was taken as the final result. The test results are shown in Table 1 below.

[0038] Table 1 Flame retardant fire performance test results

[0039] The comparison between Example 1 and Comparative Example 2 shows that the flame retardant and fireproof properties of the rock wool board can be significantly improved by selecting aluminum sol dry powder and water-based phenolic resin as binders. The comparison between Example 1 and Comparative Example 3 shows that the addition of aluminum hydroxide can also improve the flame retardant and fireproof properties of the rock wool board.

[0040] Comparison between Example 3 and Examples 5 to 8 shows that the flame retardant and fireproof properties of the rock wool board can be further improved by modifying aluminum hydroxide with methyl MQ silicone resin. Comparison between Examples 5 to 6 and Examples 7 to 8 shows that when the weight ratio of methyl MQ silicone resin to aluminum hydroxide in the methyl MQ silicone resin-modified aluminum hydroxide is 1:19 to 24, it helps to further improve the flame retardant and fireproof properties of the rock wool board.

[0041] ② Determination of fire resistance limit: Referring to GB / T 9978.1-2008 "Fire resistance test methods for building components Part 1: General requirements", the fire resistance limit of the rock wool board prepared in Example 8 was tested. The results showed that the fire resistance limit of the rock wool board reached 120 minutes, which can meet the market demand.

[0042] Experimental Example 2 Tensile Strength Test The tensile strength perpendicular to the surface of the rock wool board prepared in Examples 1 to 4, Examples 9 to 12 and Comparative Examples 1 to 2 was tested with reference to GB / T 30804-2014 "Determination of tensile strength perpendicular to the surface of thermal insulation products for construction", and the average of the results of the three samples was taken as the final result, and the result was retained to one decimal place. The test results are shown in Table 2 below.

[0043] Table 2 Tensile strength test results

[0044] The comparison between Example 1 and Comparative Examples 1-2 shows that by selecting aluminum sol dry powder and water-based phenolic resin as binders, the tensile strength of the rock wool board can be significantly improved. The comparison between Example 2 and Example 3-4 shows that when the weight ratio of aluminum sol dry powder and water-based phenolic resin is 1-4:1, it helps to further improve the tensile strength of the rock wool board. The comparison between Example 3 and Example 9-12 shows that by modifying the aluminum sol dry powder with zinc acetate, the tensile strength of the rock wool board can be further improved. The comparison between Example 9-10 and Example 11-12 shows that when the weight ratio of zinc acetate to aluminum sol dry powder in the modified aluminum sol dry powder is 1:4-9, it helps to further improve the tensile strength of the rock wool board.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flame retardant and fireproof rock wool board, characterized in that: The raw materials include the following components in parts by weight: 100 parts of basalt, 30-40 parts of slag, 10-20 parts of dolomite, 30-50 parts of aluminum hydroxide, 10-15 parts of iron ore, and 5-10 parts of binder; The binder comprises aluminum sol dry powder and water-based phenolic resin in a weight ratio of 1 to 9:

1.

2. The flame retardant and fireproof rock wool board according to claim 1, characterized in that: The weight ratio of the aluminum sol dry powder to the water-based phenolic resin is 1-4:

1.

3. The flame retardant and fireproof rock wool board according to claim 1, characterized in that: The aluminum hydroxide is methyl MQ silicone resin modified aluminum hydroxide.

4. The flame retardant and fireproof rock wool board according to claim 3, characterized in that: The preparation method of the methyl MQ silicone resin modified aluminum hydroxide comprises the following steps: dissolving the methyl MQ silicone resin in xylene, adding aluminum hydroxide, dispersing evenly, and drying to obtain the methyl MQ silicone resin modified aluminum hydroxide.

5. The flame retardant and fireproof rock wool board according to claim 3, characterized in that: In the methyl MQ silicone resin modified aluminum hydroxide, the weight ratio of methyl MQ silicone resin to aluminum hydroxide is 1:19-24.

6. A flame retardant and fireproof rock wool board according to any one of claims 1 to 5, characterized in that: The aluminum sol dry powder is a modified aluminum sol dry powder, and the components of the modified aluminum sol dry powder include zinc acetate and aluminum sol dry powder in a weight ratio of 1:4-9.

7. The flame retardant and fireproof rock wool board according to claim 6, characterized in that: The preparation method of the modified aluminum sol dry powder comprises the following steps: dissolving the aluminum sol dry powder in water, adding zinc acetate, dispersing evenly, and dehydrating to obtain the modified aluminum sol dry powder.

8. A method for preparing the flame retardant and fireproof rock wool board according to claim 1, characterized in that: The following steps are involved: S1, adding a binder into water to obtain a binder solution; S2, mixing basalt, slag, dolomite and iron ore, crushing, melting, spinning, adding the binder solution, and obtaining rock wool fibers; S3. Collect the rock wool fibers, add aluminum hydroxide, press, and solidify to obtain a flame retardant and fireproof rock wool board.

9. The method for preparing a flame retardant and fireproof rock wool board according to claim 8, characterized in that: In step S1, the water content of the binder solution is 3wt%-5wt%.

10. The method for preparing a flame retardant and fireproof rock wool board according to claim 8, characterized in that: In step S3, during the curing, the temperature is 180-200°C.

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