Flame-retardant thermal insulation rock wool board and preparation method thereof

Abstract

The present application relates to the technical field of thermal insulation materials, and discloses a kind of flame-retardant thermal insulation rock wool board, including the following weight parts component raw materials: 30~40 parts basalt fiber, 10~15 parts perlite, 30~35 parts cement, 4~6 parts carboxymethyl cellulose, 6~8 parts modified magnesium hydroxide, 2~4 parts water repellent agent, 12~15 parts water;The modified magnesium hydroxide is obtained by modifying magnesium hydroxide with 3-ethoxy-4-ethoxycarboxyphenylacetic acid.The above technical scheme solves the problems of high thermal conductivity, low tensile strength and combustion grade of rock wool board in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal insulation materials, in particular to a flame-retardant thermal insulation rock wool board and a preparation method thereof. BACKGROUND

[0002] Rock wool board is a kind of porous flame-retardant material made of basalt as the main raw material. These pores can greatly reduce heat exchange, so rock wool board also has certain thermal insulation performance. However, rock wool products are easy to absorb water, and the thermal insulation effect will be affected after being damp. By adding some materials with non-hydrophilic properties, the thermal insulation effect can be improved. However, these materials will reduce the mechanical properties of rock wool board. When used as decorative materials for building outer walls and indoor walls, it is required to meet the demand of high thermal insulation and high mechanical properties of building materials, thus limiting the wide use of rock wool board in the field of building engineering. SUMMARY

[0003] The present application provides a flame-retardant thermal insulation rock wool board and a preparation method thereof, which solves the problem of high thermal conductivity, low tensile strength and low combustion grade of rock wool board in the related art.

[0004] The technical scheme of the present application is as follows:

[0005] The present application provides a flame-retardant thermal insulation rock wool board, which comprises the following components by weight: 30-40 parts of basalt fiber, 10-15 parts of perlite, 30-35 parts of cement, 4-6 parts of carboxymethyl cellulose, 6-8 parts of modified magnesium hydroxide, 2-4 parts of hydrophobic agent, and 12-15 parts of water.

[0006] The modified magnesium hydroxide is obtained by modifying magnesium hydroxide with 3-ethoxy-4-ethoxycarboxyphenylacetic acid.

[0007] As a further technical scheme, the mass of the carboxymethyl cellulose is 8-12% of the sum of the mass of the basalt fiber and the mass of the perlite.

[0008] As a further technical scheme, the mass of the carboxymethyl cellulose is 10% of the sum of the mass of the basalt fiber and the mass of the perlite.

[0009] As a further technical scheme, the mass of the 3-ethoxy-4-ethoxycarboxyphenylacetic acid is 2-4% of the weight of the magnesium hydroxide.

[0010] As a further technical scheme, the mass of the 3-ethoxy-4-ethoxycarboxyphenylacetic acid is 3% of the weight of the magnesium hydroxide.

[0011] As a further technical scheme, the preparation method of the modified magnesium hydroxide comprises the following steps: adding magnesium hydroxide and 3-ethoxy-4-ethoxycarboxyphenylacetic acid into an ethanol solution for modification to obtain modified magnesium hydroxide.

[0012] As a further technical solution, the modification temperature is 65-75 DEG C, and the modification time is 1-2h.

[0013] As a further technical solution, the ethanol solution is composed of water and anhydrous ethanol in a volume ratio of 5:2.

[0014] As a further technical solution, the hydrophobic agent is one or more of methylsilanol sodium emulsion, polysiloxane emulsion and silicone-acrylate emulsion.

[0015] The application also includes a preparation method of the flame-retardant thermal insulation rock wool board, comprising the following steps:

[0016] The basalt fiber, perlite, cement, carboxymethyl cellulose, modified magnesium hydroxide and hydrophobic agent are uniformly mixed, water is added, and then uniformly mixed again, and then solidified and dried to obtain the rock wool board.

[0017] As a further technical solution, the solidification time is 4-5h.

[0018] The working principle and beneficial effects of the application are as follows:

[0019] 1. In the application, the addition of carboxymethyl cellulose in the rock wool board can improve the tensile strength and flame-retardant grade of the rock wool board, and reduce the thermal conductivity, and the carboxymethyl cellulose can also form a crosslinked network with the basalt fiber and the perlite, further improving the tensile strength and flame-retardant grade of the rock wool board, and the addition of the 3-ethoxy-4-ethoxycarboxyphenylacetic acid modified magnesium hydroxide can further improve the tensile strength and reduce the thermal conductivity of the rock wool board while improving the flame-retardant grade. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0021] In the following examples and comparative examples:

[0022] The diameter of the basalt fiber is 9-17 mu m, and the manufacturer is Taian Zhirong Engineering Materials Co., Ltd.

[0023] The particle size of the perlite is 20 mesh, and the manufacturer is Xinyang Mingxiang Industry Co., Ltd.

[0024] The cement is portland cement with a particle size of 425 mu m, and the manufacturer is Hebei Maikemai Mineral Products Co., Ltd.

[0025] The model number of the carboxymethyl cellulose is 2196, and the manufacturer is Renqiu Shuangcheng Chemical Product Factory;

[0026] The article number of the magnesium hydroxide is HN-MHT01, and the manufacturer is Hangzhou Hengge Nanometer Technology Co., Ltd.;

[0027] The model number of the sodium methylsilanol solution is 103, and the manufacturer is Guangdong Hulun Building Material Science and Technology Development Co., Ltd.;

[0028] The model number of the polysiloxane emulsion is 9608A, and the manufacturer is Hubei Longsheng Sihai New Material Co., Ltd.;

[0029] The ethanol solution is composed of water and anhydrous ethanol in a volume ratio of 5:2.

[0030] Example 1

[0031] A preparation method of a flame-retardant thermal insulation rock wool board, comprising the following steps:

[0032] 40 parts of basalt fiber, 10 parts of perlite, 30 parts of cement, 5 parts of carboxymethyl cellulose, 6 parts of modified magnesium hydroxide, and 2 parts of sodium methylsilanol emulsion are added to a high-speed mixer and uniformly mixed, 12 parts of water is added, and the mixture is uniformly stirred again and then placed in a mold for curing for 4 hours to obtain a rock wool board.

[0033] The preparation method of the modified magnesium hydroxide comprises the following steps:

[0034] 20 g of magnesium hydroxide and 0.6 g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid are added to 500 mL of an ethanol solution, modified at 65°C for 2 hours, filtered, washed, and dried to obtain modified magnesium hydroxide.

[0035] Example 2

[0036] A preparation method of a flame-retardant thermal insulation rock wool board, comprising the following steps:

[0037] 35 parts of basalt fiber, 13 parts of perlite, 33 parts of cement, 4 parts of carboxymethyl cellulose, 7 parts of modified magnesium hydroxide, and 3 parts of polysiloxane emulsion are added to a high-speed mixer and uniformly mixed, 13 parts of water is added, and the mixture is uniformly stirred again and then placed in a mold for curing for 4.5 hours to obtain a rock wool board.

[0038] The preparation method of the modified magnesium hydroxide comprises the following steps:

[0039] 20 g of magnesium hydroxide and 0.6 g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid are added to 500 mL of an ethanol solution, modified at 70°C for 1.5 hours, filtered, washed, and dried to obtain modified magnesium hydroxide.

[0040] Example 3

[0041] A preparation method of a flame-retardant thermal insulation rock wool board, comprising the following steps:

[0042] 30 parts of basalt fiber, 15 parts of perlite, 35 parts of cement, 6 parts of carboxymethyl cellulose, 8 parts of modified magnesium hydroxide, and 4 parts of polysiloxane emulsion are added into a high-speed blender, mixed uniformly, 15 parts of water is added, and after being mixed uniformly again, it is placed in a mold for curing for 5h to obtain a rock wool board.

[0043] The preparation method of the modified magnesium hydroxide comprises the following steps:

[0044] 20g of magnesium hydroxide and 0.6g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid are added into a 500mL ethanol solution, modified at 75℃ for 1h, filtered, washed, and dried to obtain modified magnesium hydroxide.

[0045] Example 4

[0046] The difference between this example and Example 1 is only that 4 parts of carboxymethyl cellulose is added.

[0047] Example 5

[0048] The difference between this example and Example 1 is only that 6 parts of carboxymethyl cellulose is added.

[0049] Example 6

[0050] The difference between this example and Example 1 is only that 0.4g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid is added.

[0051] Example 7

[0052] The difference between this example and Example 1 is only that 0.8g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid is added.

[0053] Example 8

[0054] The difference between this example and Example 1 is only that 0.2g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid is added.

[0055] Example 9

[0056] The difference between this example and Example 1 is only that 1g of 3-ethoxy-4-ethoxycarboxyphenylacetic acid is added.

[0057] Comparative Example 1

[0058] The difference between this comparative example and Example 1 is only that no carboxymethyl cellulose is added.

[0059] Comparative Example 2

[0060] The comparative example is compared with example 1, the only difference is that the modified magnesium hydroxide is replaced by an equal amount of magnesium hydroxide.

[0061] Comparative example 3

[0062] The comparative example is compared with example 1, the only difference is that the 3-ethoxy-4-ethoxycarbonyl phenylacetic acid is replaced by an equal amount of potassium stearate.

[0063] Performance test:

[0064] The rock wool boards obtained in examples 1-9 and comparative examples 1-3 are subjected to determination of tensile strength, thermal conductivity and combustion performance according to the method in DB 13 / T 1704-2013 "Inorganic fireproof insulation board for building exterior wall", and the test results are shown in Table 1:

[0065] Table 1 Performance test results of rock wool boards obtained in examples 1-9 and comparative examples 1-3

[0066]

[0067] In the present application, compared with example 1, comparative example 1 does not add carboxymethyl cellulose, comparative example 2 replaces modified magnesium hydroxide with an equal amount of magnesium hydroxide, and comparative example 3 replaces 3-ethoxy-4-ethoxycarbonyl phenylacetic acid with an equal amount of potassium stearate. The results of comparative examples 1-3 are that the thermal conductivity is greater than that of example 1, and the tensile strength and flame retardant grade are less than those of example 1, indicating that the addition of carboxymethyl cellulose and magnesium hydroxide modified by 3-ethoxy-4-ethoxycarbonyl phenylacetic acid in the rock wool board can reduce the thermal conductivity of the rock wool board and improve the tensile strength and flame retardant grade.

[0068] Compared with example 1, examples 4-5 change the proportion of carboxymethyl cellulose in the mass of basalt fiber and perlite, and the results of examples 4-5 are that the thermal conductivity is greater than that of example 1, and the tensile strength is less than that of example 1, indicating that when the mass of carboxymethyl cellulose is 10% of the mass sum of basalt fiber and perlite, the thermal conductivity of the rock wool board can be further reduced and the tensile strength can be improved.

[0069] Compared with example 1, examples 6-9 change the proportion of 3-ethoxy-4-ethoxycarbonyl phenylacetic acid in the mass of magnesium hydroxide, and the results of examples 1 and examples 6-7 are that the thermal conductivity is less than that of examples 8-9, and the tensile strength and flame retardant grade are greater than those of examples 8-9, indicating that when the mass of 3-ethoxy-4-ethoxycarbonyl phenylacetic acid is 2%-4% of the mass of magnesium hydroxide, the thermal conductivity of the rock wool board can be further reduced and the tensile strength and flame retardant grade can be improved, and the thermal conductivity of example 1 is less than that of examples 6-7, and the tensile strength is greater than that of examples 6-7, indicating that when the mass of 3-ethoxy-4-ethoxycarbonyl phenylacetic acid is 3% of the mass of magnesium hydroxide, the thermal conductivity of the rock wool board can be further reduced and the tensile strength can be improved.

[0070] The above merely provides the preferred embodiment of the present application and not intended to limit the present application. Accordingly, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A flame-retardant thermal insulation rock wool board, characterized in that, The raw materials include the following components by weight: 30-40 parts basalt fiber, 10-15 parts perlite, 30-35 parts cement, 4-6 parts carboxymethyl cellulose, 6-8 parts modified magnesium hydroxide, 2-4 parts water repellent, and 12-15 parts water; The modified magnesium hydroxide is obtained by modifying magnesium hydroxide with 3-ethoxy-4-ethoxycarboxyphenylacetic acid; The mass of the carboxymethyl cellulose is 10% of the sum of the masses of basalt fiber and perlite. The mass of the 3-ethoxy-4-ethoxycarboxyphenylacetic acid is 2% to 4% of the weight of magnesium hydroxide.

2. The flame-retardant thermal insulation rock wool board according to claim 1, characterized in that, The method for preparing the modified magnesium hydroxide includes the following steps: adding magnesium hydroxide and 3-ethoxy-4-ethoxycarboxyphenylacetic acid to an ethanol solution for modification to obtain modified magnesium hydroxide.

3. The flame-retardant thermal insulation rock wool board according to claim 2, characterized in that, The modification temperature is 65~75℃, and the modification time is 1~2h.

4. The flame-retardant thermal insulation rock wool board according to claim 1, characterized in that, The hydrophobic agent is one or more of sodium methylsiloxane emulsion, polysiloxane emulsion, and silicone-acrylic emulsion.

5. A method for preparing a flame-retardant thermal insulation rock wool board according to any one of claims 1 to 4, characterized in that, The process includes the following steps: mixing basalt fiber, perlite, cement, carboxymethyl cellulose, modified magnesium hydroxide, and water-repellent agent evenly, adding water, mixing evenly again, curing, and drying to obtain rock wool board.

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