Flame-retardant polystyrene composite insulation board and preparation method thereof

Abstract

The application relates to the technical field of building materials, and discloses a kind of flame-retardant polystyrene composite insulation board and preparation method thereof, flame-retardant polystyrene composite insulation board includes the following components by weight: cement 70~80 parts, polystyrene particles 25~35 parts, dispersible latex powder 2~3 parts, SiO2 aerogel 7~10 parts, silica fume 8~12 parts, water 40~50 parts, water reducing agent 0.5~1 part;Polystyrene particles include the following components by weight: polystyrene 100 parts, flame retardant 10~15 parts, antioxidant 0.2~0.4 parts;Flame retardant includes 3-phenylsulfonyl benzene sulfonic acid potassium, magnesium hydroxide, zinc borate.Through the above technical scheme, the problem of poor flame retardance and strength of the polystyrene composite insulation board in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, specifically to a flame-retardant polystyrene composite insulation board and its preparation method. Background Technology

[0002] Currently, polystyrene particle-containing insulation boards are widely used in building exterior wall insulation materials due to their economic efficiency and low water absorption. However, due to polystyrene's insufficient toughness, its impact strength and other mechanical properties cannot meet market demands. Furthermore, polystyrene has drawbacks such as high smoke production and flammability, posing a safety hazard when exposed to open flames, and significantly threatening people's lives and property. This limits its application in building materials. Therefore, to improve the flame retardant properties and impact strength of polystyrene insulation boards, polystyrene needs to be modified. Currently, the commonly used flame retardants in flame-retardant polystyrene are mainly halogenated flame retardants, including decabromodiphenyl ether, tetrabromobisphenol A (TBBA), and hexabromododecane (HBCD). These flame retardants produce large amounts of toxic gases when burning, which is inconsistent with the environmentally friendly development trend of building materials. Therefore, developing halogen-free polystyrene insulation boards with excellent flame retardant effects and mechanical properties has become a research hotspot. Summary of the Invention

[0003] This invention proposes a flame-retardant polystyrene composite insulation board and its preparation method, which solves the problem of poor flame retardancy and strength of polystyrene composite insulation boards in related technologies.

[0004] The technical solution of the present invention is as follows:

[0005] This invention proposes a flame-retardant polystyrene composite insulation board, comprising the following components by weight: 70-80 parts cement, 20-30 parts polystyrene particles, 2-3 parts dispersible latex powder, 7-10 parts SiO2 aerogel, 8-12 parts silica fume, 40-50 parts water, and 0.5-1 part water-reducing agent.

[0006] The polystyrene particles comprise the following components in parts by weight: 100 parts polystyrene, 10-15 parts flame retardant, and 0.2-0.4 parts antioxidant;

[0007] The flame retardant includes potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate.

[0008] As a further technical solution, the mass ratio of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate is 1:7:2~3:6:1.

[0009] As a further technical solution, the mass ratio of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate is 2:5:3.

[0010] In this invention, by adjusting the mass ratio of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate in the polystyrene particles to 1:7:2~3:6:1, the flame retardancy and strength of the flame-retardant polystyrene composite insulation board are further improved. In particular, when the mass ratio of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate is 2:5:3, the strength of the insulation board is optimal.

[0011] As a further technical solution, the flame retardant is a polyphenylene ether modified flame retardant.

[0012] As a further technical solution, the preparation method of the polyphenylene ether modified flame retardant includes the following steps: ultrasonically dispersing potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate in a polyphenylene ether solution, removing the solvent, and obtaining the polyphenylene ether modified flame retardant.

[0013] As a further technical solution, the polyphenylene ether solution includes polyphenylene ether and a solvent, wherein the solvent is one of N-methylpyrrolidone and acetone.

[0014] As a further technical solution, the polyphenylene ether is two of polyphenylene ether LXR35, polyphenylene ether LXR40, and polyphenylene ether LXR45.

[0015] As a further technical solution, when the polyphenylene ether is polyphenylene ether LXR35 and polyphenylene ether LXR40, the mass ratio of polyphenylene ether LXR35 to polyphenylene ether LXR40 is 2:8.

[0016] In this invention, by using polyphenylene ether modified flame retardant, the dispersibility of the flame retardant in the polystyrene matrix is ​​improved, and the impact resistance of polystyrene is also improved, further enhancing the strength of the flame-retardant polystyrene composite insulation board. In particular, when the mass ratio of polyphenylene ether LXR35 to polyphenylene ether LXR40 is 2:8, the modified flame retardant further enhances the strength of the flame-retardant polystyrene composite insulation board.

[0017] As a further technical solution, the dispersible latex powder is one of ethylene-vinyl acetate copolymer, vinyl acetate-ethylene tert-carbonate copolymer, and acrylic acid copolymer; the antioxidant is one or more of antioxidant 1010, antioxidant 168, and antioxidant 1024.

[0018] This invention also proposes a method for preparing the flame-retardant polystyrene composite insulation board, comprising the following steps:

[0019] S1. Mix the components of the polystyrene granules, extrude and granulate to obtain polystyrene granules;

[0020] S2. The remaining components of the polystyrene granules and polystyrene composite insulation board are molded to obtain the polystyrene composite insulation board.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] 1. In this invention, potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate are added to the polystyrene particles of the flame-retardant polystyrene composite insulation board. The three substances work synergistically to retard the flame, reduce the flammability of polystyrene, and significantly improve the flame retardancy and strength of the flame-retardant polystyrene composite insulation board. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] In the following examples and comparative examples, the cement was P.O42.5 silicate cement; the polystyrene was GPPS251; the dispersible latex powder was Wacker 5010N; the water-reducing agent was FDN-7; the purity of potassium 3-benzenesulfonylbenzenesulfonate was 98.9 wt%; the particle size of magnesium hydroxide was 1250 mesh; the particle size of zinc borate was 1 μm; and the particle size of SiO2 aerogel was 50 μm.

[0025] Example 1

[0026] Flame-retardant polystyrene composite insulation board comprises the following components by weight: 70 parts cement, 25 parts polystyrene granules, 2 parts dispersible latex powder, 7 parts SiO2 aerogel, 8 parts silica fume, 40 parts water, and 0.5 parts water-reducing agent.

[0027] The polystyrene granules comprise the following components in parts by weight: 100 parts polystyrene, 1 part potassium 3-benzenesulfonylbenzenesulfonate, 5 parts magnesium hydroxide, 4 parts zinc borate, 0.1 parts antioxidant 1010, and 0.1 parts antioxidant 168.

[0028] The preparation method of flame-retardant polystyrene composite insulation board includes the following steps:

[0029] S1. Mix the components of the polystyrene granules, extrude and granulate to obtain polystyrene granules;

[0030] S2. The remaining components of the polystyrene granules and polystyrene composite insulation board are molded to obtain the polystyrene composite insulation board.

[0031] Example 2

[0032] Flame-retardant polystyrene composite insulation board comprises the following components by weight: 75 parts cement, 30 parts polystyrene granules, 2.5 parts dispersible latex powder, 8 parts SiO2 aerogel, 10 parts silica fume, 45 parts water, and 1 part water-reducing agent.

[0033] The polystyrene granules comprise the following components in parts by weight: 100 parts polystyrene, 1.2 parts potassium 3-benzenesulfonylbenzenesulfonate, 6 parts magnesium hydroxide, 4.8 parts zinc borate, and 0.3 parts antioxidant 168.

[0034] The preparation method of flame-retardant polystyrene composite insulation board includes the following steps:

[0035] S1. Mix the components of the polystyrene granules, extrude and granulate to obtain polystyrene granules;

[0036] S2. The remaining components of the polystyrene granules and polystyrene composite insulation board are molded to obtain the polystyrene composite insulation board.

[0037] Example 3

[0038] Flame-retardant polystyrene composite insulation board comprises the following components by weight: 80 parts cement, 35 parts polystyrene granules, 3 parts dispersible latex powder, 10 parts SiO2 aerogel, 12 parts silica fume, 50 parts water, and 1 part water-reducing agent.

[0039] The polystyrene granules comprise the following components in parts by weight: 100 parts polystyrene, 1.5 parts potassium 3-benzenesulfonylbenzenesulfonate, 7.5 parts magnesium hydroxide, 6 parts zinc borate, and 0.4 parts antioxidant 1024;

[0040] The preparation method of flame-retardant polystyrene composite insulation board includes the following steps:

[0041] S1. Mix the components of the polystyrene granules, extrude and granulate to obtain polystyrene granules;

[0042] S2. The remaining components of the polystyrene granules and polystyrene composite insulation board are molded to obtain the polystyrene composite insulation board.

[0043] Example 4

[0044] The difference between this embodiment and Embodiment 3 is only that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene, 6 parts potassium 3-benzenesulfonylbenzenesulfonate, 7.5 parts magnesium hydroxide, 1.5 parts zinc borate, and 0.4 parts antioxidant 1024.

[0045] Example 5

[0046] The difference between this embodiment and Embodiment 3 is only that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene, 1.5 parts potassium 3-benzenesulfonylbenzenesulfonate, 10.5 parts magnesium hydroxide, 3 parts zinc borate, and 0.4 parts antioxidant 1024.

[0047] Example 6

[0048] The difference between this embodiment and Embodiment 3 is only that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene, 4.5 parts potassium 3-benzenesulfonylbenzenesulfonate, 9 parts magnesium hydroxide, 1.5 parts zinc borate, and 0.4 parts antioxidant 1024.

[0049] Example 7

[0050] The difference between this embodiment and Embodiment 3 is only that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene, 3 parts potassium 3-benzenesulfonylbenzenesulfonate, 7.5 parts magnesium hydroxide, 4.5 parts zinc borate, and 0.4 parts antioxidant 1024.

[0051] Example 8

[0052] The difference between this embodiment and Example 7 is only that the flame retardant in the polystyrene particles is modified with polyphenylene ether. The preparation method of the polyphenylene ether modified flame retardant includes the following steps: after dissolving polyphenylene ether LXR35 and polyphenylene ether LXR40 in acetone at a mass ratio of 3:7, potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate are added and ultrasonically dispersed, and then the acetone is removed to obtain the polyphenylene ether modified flame retardant.

[0053] Example 9

[0054] The difference between this embodiment and Example 7 is only that the flame retardant in the polystyrene particles is modified with polyphenylene ether. The preparation method of the polyphenylene ether modified flame retardant includes the following steps: dissolving polyphenylene ether LXR35 and polyphenylene ether LXR45 in a mass ratio of 3:7 with N-methylpyrrolidone, adding potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate for ultrasonic dispersion, removing N-methylpyrrolidone, and obtaining the polyphenylene ether modified flame retardant.

[0055] Example 10

[0056] The difference between this embodiment and Example 7 is only that the flame retardant in the polystyrene particles is modified with polyphenylene ether. The preparation method of the polyphenylene ether modified flame retardant includes the following steps: after dissolving polyphenylene ether LXR40 and polyphenylene ether LXR45 in acetone at a mass ratio of 3:7, potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate are added and ultrasonically dispersed, and then the acetone is removed to obtain the polyphenylene ether modified flame retardant.

[0057] Example 11

[0058] The difference between this embodiment and Example 7 is only that the flame retardant in the polystyrene particles is modified with polyphenylene ether. The preparation method of the polyphenylene ether modified flame retardant includes the following steps: after dissolving polyphenylene ether LXR35 and polyphenylene ether LXR40 in acetone at a mass ratio of 2:8, potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate are added and ultrasonically dispersed, and then the acetone is removed to obtain the polyphenylene ether modified flame retardant.

[0059] Example 12

[0060] The difference between this embodiment and Example 7 is only that the flame retardant in the polystyrene particles is modified with polyphenylene ether. The preparation method of the polyphenylene ether modified flame retardant includes the following steps: dissolving polyphenylene ether LXR35 and polyphenylene ether LXR40 in acetone at a mass ratio of 1:9, adding potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide and zinc borate for ultrasonic dispersion, removing acetone, and obtaining the polyphenylene ether modified flame retardant.

[0061] Comparative Example 1

[0062] The only difference between this comparative example and Example 3 is that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene, 15 parts potassium 3-benzenesulfonylbenzenesulfonate, and 0.4 parts antioxidant 1024.

[0063] Comparative Example 2

[0064] The only difference between this comparative example and Example 3 is that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene, 8.3 parts magnesium hydroxide, 6.7 parts zinc borate, and 0.4 parts antioxidant 1024.

[0065] Comparative Example 3

[0066] The only difference between this comparative example and Example 3 is that the polystyrene particles include the following components in parts by weight: 100 parts polystyrene and 0.4 parts antioxidant 1024.

[0067] The flame retardant rating of the flame-retardant polystyrene composite insulation boards prepared in Examples 1-12 and Comparative Examples 1-3 was tested according to standard GB 8624-2012 "Classification of Burning Performance of Building Materials and Products"; the compressive strength of the flame-retardant polystyrene composite insulation boards prepared in Examples 1-12 and Comparative Examples 1-3 was tested according to standard GB / T 5486-2008 "Test Methods for Inorganic Rigid Thermal Insulation Products"; the test results are shown in Table 1 below.

[0068] According to standard GB / T 10294-2008 "Determination of Steady-State Thermal Resistance and Related Properties of Thermal Insulation Materials - Protective Hot Plate Method", the thermal conductivity of the flame-retardant polystyrene composite insulation boards prepared in Examples 1-3, Examples 7-12 and Comparative Examples 1-3 were tested respectively. The test results are shown in Table 2 below.

[0069] Table 1. Flame retardant performance and strength test results

[0070]

[0071] By comparing the data from Examples 1-12 and Comparative Examples 1-3, it was found that the flame-retardant polystyrene composite insulation boards prepared in Examples 1-12 had higher compressive strength and flammability rating compared to Comparative Examples 1-3. This indicates that the addition of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate to the polystyrene particles in the flame-retardant polystyrene composite insulation board resulted in a synergistic flame retardancy effect, significantly improving the flame retardancy and strength of the flame-retardant polystyrene composite insulation board.

[0072] Comparing the data from Examples 3-7, it was found that the flame-retardant polystyrene composite insulation boards prepared in Examples 5-7 had higher compressive strength and flammability rating compared to Examples 3-4. This indicates that adjusting the mass ratio of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate in the polystyrene particles to 1:7:2-3:6:1 can further improve the flame retardancy and strength of the flame-retardant polystyrene composite insulation board. In particular, the insulation board has the best strength when the mass ratio of potassium 3-benzenesulfonylbenzenesulfonate, magnesium hydroxide, and zinc borate is 2:5:3.

[0073] Comparing the data from Examples 7-12, it was found that the flame-retardant polystyrene composite insulation boards prepared in Examples 8-12 had higher compressive strength and flammability rating compared to Example 7. This indicates that by using polyphenylene ether modified flame retardant to improve the dispersion of the flame retardant in the polystyrene matrix and simultaneously improve the impact resistance of polystyrene, the strength of the flame-retardant polystyrene composite insulation board can be further improved. When the mass ratio of polyphenylene ether LXR35 to polyphenylene ether LXR40 is 2:8, the modified flame retardant further improves the strength of the flame-retardant polystyrene composite insulation board.

[0074] Table 2 Thermal conductivity test results

[0075]

[0076] By comparing the data of Examples 1-3, Examples 7-12 and Comparative Examples 1-3, it was found that the thermal conductivity of the flame-retardant polystyrene composite insulation boards prepared in Examples 1-3 and Examples 7-12 was lower than that in Comparative Examples 1-3, indicating that the flame-retardant polystyrene composite insulation boards prepared by the technical solution of the present invention have better insulation effect.

[0077] The above are merely 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 within the protection scope of the present invention.

Claims

1. A flame-retardant polystyrene composite insulation board, characterized by, The cement 70~80 parts, polystyrene particles 25~35 parts, dispersible latex powder 2~3 parts, SiO2 aerogel 7~10 parts, silica fume 8~12 parts, water 40~50 parts, water reducing agent 0.5~1 parts are mixed to obtain the polystyrene composite thermal insulation board. The polystyrene particles include the following components by weight: polystyrene 100 parts, flame retardant 10~15 parts, antioxidant 0.2~0.4 parts. The flame retardant includes 3-phenylsulfonyl potassium benzenesulfonate, magnesium hydroxide and zinc borate.

2. The fire-retardant polystyrene composite insulation board according to claim 1, characterized in that, The mass ratio of the 3-phenylsulfonyl potassium benzenesulfonate, magnesium hydroxide and zinc borate is 2:5:

3.

3. The fire-retardant polystyrene composite insulation board according to claim 1, characterized in that, The flame retardant is a polyphenyl ether modified flame retardant.

4. The fire-retardant polystyrene composite insulation board according to claim 3, characterized in that, The preparation method of the polyphenyl ether modified flame retardant includes the following steps: ultrasonic dispersion of 3-phenylsulfonyl potassium benzenesulfonate, magnesium hydroxide and zinc borate in a polyphenyl ether solution, desolvation, to obtain a polyphenyl ether modified flame retardant.

5. The fire-retardant polystyrene composite insulation board according to claim 4, characterized in that, The polyphenyl ether solution includes polyphenyl ether and a solvent, and the solvent is one of N-methyl pyrrolidone and acetone.

6. The fire-retardant polystyrene composite insulation board according to claim 5, characterized in that, The polyphenyl ether is two of polyphenyl ether LXR35, polyphenyl ether LXR40 and polyphenyl ether LXR45.

7. The flame-retardant polystyrene composite insulation board according to claim 6, characterized in that, When the polyphenyl ether is polyphenyl ether LXR35 and polyphenyl ether LXR40, the mass ratio of polyphenyl ether LXR35 and polyphenyl ether LXR40 is 2:

8.

8. The flame-retardant polystyrene composite insulation board according to claim 1, characterized in that, The dispersible latex powder is one of ethylene-vinyl acetate copolymer, vinyl acetate-tert-butyl alcohol copolymer and acrylic acid copolymer; and the antioxidant is one or more of antioxidant 1010, antioxidant 168 and antioxidant 1024.

9. The preparation method of the flame-retardant polystyrene composite insulation board according to any one of claims 1-8, characterized in that, The method includes the following steps: S1, mixing the components of the polystyrene particles, extruding and granulating to obtain the polystyrene particles; S2, molding the polystyrene particles and the remaining components of the polystyrene composite thermal insulation board to obtain the polystyrene composite thermal insulation board.

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