Energy-saving expandable polystyrene sound insulation plate for building

Abstract

The invention relates to the technical field of sound insulation boards, in particular to a building energy-saving expandable polystyrene sound insulation board. Comprising the following components in parts by weight: 8 to 12 parts of a composite enhancer, 42 to 48 parts of styrene, 0.1 to 0.5 part of benzoyl peroxide, 0.3 to 0.7 part of an azodiisobutyronitrile foaming agent, 55 to 85 parts of methylbenzene, 2 to 6 parts of silicon dioxide, 3 to 9 parts of talcum powder and 1 to 7 parts of dioctyl phthalate, wherein the composite reinforcer is obtained by mixing acrylic acid and Troger base polyimide according to the mass ratio of 1: (2-3); a composite enhancer is adopted, acrylic acid and Troger base polyimide are introduced into polystyrene, external force is absorbed and dispersed through a flexible segment of the acrylic acid, heat preservation and temperature resistance of the material are improved through temperature resistance and low heat conductivity of the Troger base polyimide, and heat preservation and temperature resistance of the material are improved through binding force of the acrylic acid and the Troger base polyimide. The sound insulation effect of the material is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sound insulation boards, in particular to a building energy-saving expandable polystyrene sound insulation board. Background Art

[0002] Polystyrene sound insulation board, as a high-efficiency acoustic material, has been widely used in buildings, interior decoration of vehicles, music rooms, recording studios and various places where noise propagation needs to be controlled in recent years. This board is mainly made of polystyrene (Polystyrene), a lightweight polymer material, through a special process. It not only has excellent sound insulation performance, but also has good heat preservation, moisture resistance, fire resistance and easy processing characteristics, becoming a shining star in the field of modern sound insulation materials.

[0003] However, the existing polystyrene sound insulation board has low tensile strength, which makes the board easily damaged when subjected to external force, affecting the building's energy-saving expandability and sound insulation effect. In view of this, a building energy-saving expandable polystyrene sound insulation board is provided. Summary of the invention

[0004] The object of the present invention is to provide an expandable polystyrene sound insulation board for building energy conservation, so as to solve the problem of poor tensile strength in the preparation process of the polystyrene sound insulation board mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides an energy-saving expandable polystyrene sound insulation board for buildings, comprising the following components in parts by weight: 8-12 parts by weight of a composite reinforcing agent, 42-48 parts by weight of styrene, 0.1-0.5 parts by weight of benzoyl peroxide, 0.3-0.7 parts by weight of azobisisobutyronitrile foaming agent, 55-85 parts by weight of toluene, 2-6 parts by weight of silicon dioxide, 3-9 parts by weight of talc and 1-7 parts by weight of dioctyl phthalate; The composite reinforcing agent is obtained by mixing acrylic acid and Chaogel base polyimide in a mass ratio of 1:2-3.

[0006] As a further improvement of the technical solution, the specific preparation method of the composite strengthener is as follows: Add the Chogel base polyimide to N,N-dimethylformamide and stir until it is completely dissolved. Add acrylic acid under stirring, and then add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide in sequence. Stir the reaction mixture at room temperature for 12-15 hours. After the reaction is completed, pour the reaction mixture into ethanol to precipitate the product, wash the precipitate, and dry it in a vacuum drying oven at 60-70°C to constant weight to obtain a composite strengthener.

[0007] Acrylic acid is connected to styrene through double bonds by free radical polymerization to form a copolymer. The carboxyl group of acrylic acid is still retained and becomes a part of the copolymer chain. After copolymerization, the formed polymer chain contains both rigid segments of styrene and flexible segments of acrylic acid. This structural diversity allows the flexible segments to act as a buffer when the material is subjected to external force, reducing the generation and expansion of cracks, thereby improving the overall strength and toughness of the material. However, the glass transition temperature of acrylic acid and styrene copolymers is relatively low, which limits their application in high temperature environments.

[0008] The molecular structure of Choger base polyimide contains a unique Choger base structure. Choger base is a rigid V-shaped bridged bicyclic linking group. This structure has high rigidity and can effectively limit the movement of the molecular chain, thereby improving the heat resistance of the material. Its end contains an amino group, so it can react with the carboxyl group of the styrene copolymer. When the Choger base polyimide is combined with polystyrene, the rigid structure increases the free volume fraction and reduces the heat conduction path, thereby reducing the thermal conductivity and having good thermal insulation performance, so that the composite material has both excellent mechanical properties and good heat resistance and thermal insulation properties.

[0009] In addition, the introduction of Chogl base polyimide and acrylic acid increases the density of the material. Materials with higher density are more difficult to be penetrated by sound waves, and the chemical bonding between Chogl base polyimide and acrylic acid can form a new molecular chain structure. The intermolecular interactions in these structures (such as hydrogen bonds, van der Waals forces, etc.) are stronger than those of pure polystyrene. Stronger intermolecular interactions can make the material more compact and reduce internal voids, thereby reducing the propagation speed and efficiency of sound waves inside the material and improving the sound insulation performance of the material.

[0010] As a further improvement of the technical solution, the mass ratio of the Chaoger base polyimide to N,N-dimethylformamide is 1:10-15.

[0011] As a further improvement of the technical solution, the mass ratio of the 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride to acrylic acid is 0.3-0.5:1.

[0012] As a further improvement of the technical solution, the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.2-0.6:1.

[0013] As a further improvement of the technical solution, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine. The pre-foamed material is transferred to a mold for final molding to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

[0014] As a further improvement of the technical solution, the mass fraction of the benzoyl peroxide solution is 1-3%.

[0015] As a further improvement of the technical solution, the azobisisobutyronitrile foaming agent accounts for 2-5% of the mass of toluene.

[0016] As a further improvement of the technical solution, the pre-foaming temperature is 90-100° C., and the pre-foaming time is 10-20 minutes.

[0017] As a further improvement of the technical solution, the molding temperature is 100-120° C. and the molding time is 30-60 min.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In the energy-saving expandable polystyrene sound insulation board for buildings, a composite reinforcing agent is used to improve the overall strength and toughness of the material through the flexible chain segment of acrylic acid, thereby improving the tensile strength of the material. By introducing choger base polyimide and utilizing its excellent high temperature resistance and low thermal conductivity, not only the problem of acrylic acid and styrene copolymer not being resistant to high temperatures is overcome, but also the energy-saving expandability of polystyrene is achieved. At the same time, the interaction between acrylic acid and choger base polyimide makes the material more compact and reduces internal gaps, thereby reducing the propagation speed and efficiency of sound waves inside the material and further improving the sound insulation performance. DETAILED DESCRIPTION

[0019] 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 making creative work are within the scope of protection of the present invention.

[0020] A building energy-saving expandable polystyrene sound insulation board, comprising the following components in parts by weight: 8-12 parts by weight of a composite reinforcing agent, 42-48 parts by weight of styrene, 0.1-0.5 parts by weight of benzoyl peroxide, 0.3-0.7 parts by weight of azobisisobutyronitrile foaming agent, 55-85 parts by weight of toluene, 2-6 parts by weight of silicon dioxide, 3-9 parts by weight of talc and 1-7 parts by weight of dioctyl phthalate; The composite reinforcing agent is obtained by mixing acrylic acid and Chaogel base polyimide in a mass ratio of 1:2-3.

[0021] Example 1: In this example, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: Prepare the following components: 12 parts by weight of composite reinforcing agent, 48 parts by weight of styrene, 0.5 parts by weight of benzoyl peroxide, 0.7 parts by weight of azobisisobutyronitrile foaming agent, 85 parts by weight of toluene, 6 parts by weight of silicon dioxide, 9 parts by weight of talc and 7 parts by weight of dioctyl phthalate; The composite strengthener is obtained by mixing acrylic acid and Choger base polyimide in a mass ratio of 1:2; the mass ratio of Choger base polyimide to N,N-dimethylformamide is 1:15; the mass ratio of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride to acrylic acid is 0.5:1; the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.6:1; The chogel base polyimide was added to N,N-dimethylformamide and stirred until completely dissolved. Acrylic acid was added under stirring, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide were added in sequence. The reaction mixture was stirred at room temperature for 12 hours. After the reaction was completed, the reaction mixture was poured into ethanol to precipitate the product, and the precipitate was washed and dried in a vacuum drying oven at 70°C to constant weight to obtain a composite strengthener.

[0022] The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, a 1% mass fraction of benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve, wherein the azobisisobutyronitrile foaming agent accounts for 2% of the mass of toluene, and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine at a pre-foaming temperature of 90°C and a pre-foaming time of 15 minutes. The pre-foamed material is transferred to a mold for final molding at a molding temperature of 120°C and a molding time of 60 minutes to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

[0023] Example 2: In this example, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: Prepare the following components: 12 parts by weight of composite reinforcing agent, 48 parts by weight of styrene, 0.5 parts by weight of benzoyl peroxide, 0.7 parts by weight of azobisisobutyronitrile foaming agent, 85 parts by weight of toluene, 6 parts by weight of silicon dioxide, 9 parts by weight of talc and 7 parts by weight of dioctyl phthalate; The composite strengthener is obtained by mixing acrylic acid and Choger base polyimide in a mass ratio of 1:2.5; the mass ratio of Choger base polyimide to N,N-dimethylformamide is 1:15; the mass ratio of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride to acrylic acid is 0.5:1; the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.6:1; The chogel base polyimide was added to N,N-dimethylformamide and stirred until completely dissolved. Acrylic acid was added under stirring, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide were added in sequence. The reaction mixture was stirred at room temperature for 12 hours. After the reaction was completed, the reaction mixture was poured into ethanol to precipitate the product, and the precipitate was washed and dried in a vacuum drying oven at 70°C to constant weight to obtain a composite strengthener.

[0024] The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, a 1% mass fraction of benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve, wherein the azobisisobutyronitrile foaming agent accounts for 2% of the mass of toluene, and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine at a pre-foaming temperature of 90°C and a pre-foaming time of 15 minutes. The pre-foamed material is transferred to a mold for final molding at a molding temperature of 120°C and a molding time of 60 minutes to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

[0025] Example 3: In this example, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: Prepare the following components: 12 parts by weight of composite reinforcing agent, 48 parts by weight of styrene, 0.5 parts by weight of benzoyl peroxide, 0.7 parts by weight of azobisisobutyronitrile foaming agent, 85 parts by weight of toluene, 6 parts by weight of silicon dioxide, 9 parts by weight of talc and 7 parts by weight of dioctyl phthalate; The composite strengthener is obtained by mixing acrylic acid and Choger base polyimide in a mass ratio of 1:3; the mass ratio of Choger base polyimide to N,N-dimethylformamide is 1:15; the mass ratio of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride to acrylic acid is 0.5:1; the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.6:1; The chogel base polyimide was added to N,N-dimethylformamide and stirred until completely dissolved. Acrylic acid was added under stirring, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide were added in sequence. The reaction mixture was stirred at room temperature for 12 hours. After the reaction was completed, the reaction mixture was poured into ethanol to precipitate the product, and the precipitate was washed and dried in a vacuum drying oven at 70°C to constant weight to obtain a composite strengthener.

[0026] The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, a 1% mass fraction of benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve, wherein the azobisisobutyronitrile foaming agent accounts for 2% of the mass of toluene, and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine at a pre-foaming temperature of 90°C and a pre-foaming time of 15 minutes. The pre-foamed material is transferred to a mold for final molding at a molding temperature of 120°C and a molding time of 60 minutes to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

[0027] Example 4: In this example, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: Prepare the following components: 12 parts by weight of a composite reinforcing agent, 42 parts by weight of styrene, 0.1 parts by weight of benzoyl peroxide, 0.3 parts by weight of azobisisobutyronitrile foaming agent, 55 parts by weight of toluene, 2 parts by weight of silicon dioxide, 3 parts by weight of talc and 1 part by weight of dioctyl phthalate; The composite strengthener is obtained by mixing acrylic acid and Choger base polyimide in a mass ratio of 1:3; the mass ratio of Choger base polyimide to N,N-dimethylformamide is 1:10; the mass ratio of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride to acrylic acid is 0.3:1; the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.2:1; The chogel base polyimide was added to N,N-dimethylformamide and stirred until completely dissolved. Acrylic acid was added under stirring, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide were added in sequence. The reaction mixture was stirred at room temperature for 12 hours. After the reaction was completed, the reaction mixture was poured into ethanol to precipitate the product, and the precipitate was washed and dried in a vacuum drying oven at 70°C to constant weight to obtain a composite strengthener.

[0028] The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, a 1% mass fraction of benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C, stirred for 4-6 hours under nitrogen protection, and then the heating device is turned off and naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve, wherein the azobisisobutyronitrile foaming agent accounts for 2% of the mass of toluene, and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer, and the mixed material is transferred to a pre-foaming machine. The pre-foaming temperature is 90°C and the pre-foaming time is 15 minutes. The pre-foamed material is transferred to a mold for final molding. The molding temperature is 120°C and the molding time is 60 minutes to obtain a building energy-saving expandable polystyrene sound insulation board. Example 5: In this example, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: Prepare the following components: 8 parts by weight of composite reinforcing agent, 48 parts by weight of styrene, 0.5 parts by weight of benzoyl peroxide, 0.7 parts by weight of azobisisobutyronitrile foaming agent, 85 parts by weight of toluene, 6 parts by weight of silicon dioxide, 9 parts by weight of talc and 7 parts by weight of dioctyl phthalate; The composite strengthener is obtained by mixing acrylic acid and Choger base polyimide in a mass ratio of 1:3; the mass ratio of Choger base polyimide to N,N-dimethylformamide is 1:15; the mass ratio of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride to acrylic acid is 0.5:1; the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.6:1; The chogel base polyimide was added to N,N-dimethylformamide and stirred until completely dissolved. Acrylic acid was added under stirring, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide were added in sequence. The reaction mixture was stirred at room temperature for 12 hours. After the reaction was completed, the reaction mixture was poured into ethanol to precipitate the product, and the precipitate was washed and dried in a vacuum drying oven at 70°C to constant weight to obtain a composite strengthener.

[0029] The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, a 1% mass fraction of benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve, wherein the azobisisobutyronitrile foaming agent accounts for 2% of the mass of toluene, and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine at a pre-foaming temperature of 90°C and a pre-foaming time of 15 minutes. The pre-foamed material is transferred to a mold for final molding at a molding temperature of 120°C and a molding time of 60 minutes to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

[0030] Example 6: In this example, the specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: Prepare the following components: 10 parts by weight of a composite reinforcing agent, 48 parts by weight of styrene, 0.5 parts by weight of benzoyl peroxide, 0.7 parts by weight of azobisisobutyronitrile foaming agent, 85 parts by weight of toluene, 6 parts by weight of silicon dioxide, 9 parts by weight of talc and 7 parts by weight of dioctyl phthalate; The composite strengthener is obtained by mixing acrylic acid and Choger base polyimide in a mass ratio of 1:3; the mass ratio of Choger base polyimide to N,N-dimethylformamide is 1:15; the mass ratio of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride to acrylic acid is 0.5:1; the mass ratio of N-hydroxysuccinimide to acrylic acid is 0.6:1; The chogel base polyimide was added to N,N-dimethylformamide and stirred until completely dissolved. Acrylic acid was added under stirring, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide were added in sequence. The reaction mixture was stirred at room temperature for 12 hours. After the reaction was completed, the reaction mixture was poured into ethanol to precipitate the product, and the precipitate was washed and dried in a vacuum drying oven at 70°C to constant weight to obtain a composite strengthener.

[0031] The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, a 1% mass fraction of benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve, wherein the azobisisobutyronitrile foaming agent accounts for 2% of the mass of toluene, and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine at a pre-foaming temperature of 90°C and a pre-foaming time of 15 minutes. The pre-foamed material is transferred to a mold for final molding at a molding temperature of 120°C and a molding time of 60 minutes to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

[0032] Comparative Example 1: The method of Example 3 was adopted, and the amount of the composite reinforcing agent added was 1 part by weight.

[0033] Comparative Example 2: The method of Example 3 was adopted, and the composite strengthening agent contained only acrylic acid and no Chaugol base polyimide.

[0034] Comparative Example 3: The method of Example 3 was adopted, and the composite strengthening agent contained only Chaogel base polyimide and no acrylic acid.

[0035] The present invention prepares a building energy-saving expandable polystyrene sound insulation board, which has good tensile strength, temperature resistance, heat preservation and sound insulation performance in the application of the sound insulation board technology field. Specific tests are shown in the following table: The tensile strength of polystyrene sound insulation board is tested according to GB / T 29906-2013 "Molded Polystyrene Board Thin Plastering External Wall Insulation System Materials". The tensile strength refers to the maximum stress that the material can withstand when subjected to tensile force. It is an important indicator to measure the material's ability to resist tensile damage. In building materials, tensile strength determines the stability and durability of the material when subjected to stress. Materials with high tensile strength are not easy to break when subjected to large external forces, thereby improving the safety and service life of the building. In building structures, such as walls, roofs and floors, the tensile strength of the material directly affects its load-bearing capacity and ability to resist external loads.

[0036] The thermal conductivity of the insulation board is tested according to GB / T 10294-2008 "Determination of steady-state thermal resistance and related properties of insulating materials - Guarded hot plate method". Its thermal conductivity is tested at 25°C. Thermal insulation performance refers to the ability of a material to prevent heat transfer. The lower the thermal conductivity, the better the thermal insulation performance of the material. Good thermal insulation performance can reduce the energy consumption of buildings, improve indoor comfort, and reduce heating and cooling costs. At the same time, it can also reduce energy consumption and meet the requirements of energy conservation and environmental protection.

[0037] According to GB-T 1634-1-2004 "Determination of Deformation Temperature of Plastics under Load Part 1: General Test Method", the heat deformation temperature of the plate is tested. Temperature resistance refers to the ability of a material to maintain its physical and chemical properties unchanged under high or low temperature environments. It is an important indicator to measure whether a material can work normally under extreme temperature conditions. Materials with high temperature resistance can maintain their shape and performance in high or low temperature environments, preventing deformation, cracking or failure caused by temperature changes.

[0038] According to GB / T 18696 "Measurement of sound absorption coefficient and acoustic impedance in acoustic impedance tubes", the sound absorption coefficient is tested at 1000Hz. The larger the sound absorption coefficient, the better the sound insulation performance. Sound insulation performance refers to the ability of a material to prevent sound transmission. Good sound insulation performance can reduce the impact of external noise on the indoor environment and improve living and working comfort. Sound insulation performance is particularly important in noise-sensitive places such as residences, hospitals and schools.

[0039] The obtained data are shown in Table 1 Table 1 Performance data of Examples 1-6 and Comparative Examples 1-3 By comparing Examples 1-6 with Comparative Examples 1-3, it can be seen that in a building energy-saving expandable polystyrene sound insulation board, the composite reinforcing agent will have a significant impact on the tensile strength, heat resistance, thermal insulation and sound insulation performance.

[0040] According to Examples 1-3, as the proportion of components in the composite reinforcing agent continues to change, the tensile strength, temperature resistance, and thermal insulation and sound insulation properties of the energy-saving expandable polystyrene sound insulation board for buildings gradually increase. This is because the flexible chain segments of acrylic acid and the rigid structure of the Chaoger base polyimide can work synergistically to form a uniform and stable molecular network, thereby improving the overall strength and toughness of the material. The rigid structure of the Chaoger base polyimide can effectively limit the movement of the molecular chain, thereby enhancing the temperature resistance of the material. The Chaoger base polyimide with low thermal conductivity can offset the increase in density caused by the enhanced bonding force, the decrease in heat resistance and thermal insulation properties, and the higher density makes it easier to better absorb sound wave energy, so the sound insulation performance is improved.

[0041] According to Example 3 and Example 4, it can be seen that with the continuous change of the content of other components in the energy-saving expandable polystyrene sound insulation board for building, the tensile strength, heat resistance, thermal insulation and sound insulation performance of the energy-saving expandable polystyrene sound insulation board for building have no obvious change. This is because the other components mainly have filling and reinforcement functions, and their content changes slightly within a certain range, which has little effect on the mechanical properties, heat resistance and sound insulation performance of the material, and therefore has no obvious change.

[0042] According to Example 3, Example 5 and Example 6, as the content of the composite reinforcing agent continues to change, the tensile strength, temperature resistance, thermal insulation and sound insulation performance of the building energy-saving expandable polystyrene sound insulation board continue to change. This is because the acrylic acid in the composite reinforcing agent provides flexible segments, which can absorb and disperse external forces, reduce the generation and expansion of cracks, thereby improving the tensile strength of the material. The rigid structure of the Chaoger base polyimide can enhance the temperature resistance of the material, improve the low thermal conductivity, and then improve the thermal insulation performance. The chemical bonding between the Chaoger base polyimide and acrylic acid makes the material denser, reduces the penetration of sound waves, and improves the sound insulation effect.

[0043] According to the above test experiments, Example 3 is used as the optimal example and compared with Comparative Examples 1-3 respectively.

[0044] By comparing Example 3 with Comparative Example 1, it can be seen that when the content of the composite reinforcing agent is too low, the tensile strength, temperature resistance, thermal insulation and sound insulation performance of the building energy-saving expandable polystyrene sound insulation board are worse. This is because the active components acrylic acid and Chaogel base polyimide have a weaker interaction with polystyrene, and cannot fully coordinate the enhancement of the tensile strength performance of polystyrene, cannot effectively reduce the thermal conductivity of polystyrene, the thermal insulation performance of the material is poor, and cannot effectively reduce internal gaps and reduce the propagation speed of sound waves, and the sound insulation performance of the material is poor.

[0045] By comparing Example 3 with Comparative Example 2, it can be seen that the composite reinforcing agent contains only acrylic acid and does not contain Chaoger base polyimide, the tensile strength, temperature resistance, thermal insulation and sound insulation performance of the building energy-saving expandable polystyrene sound insulation board are worse. This is because the rigid structure of the Chaoger base polyimide can provide the necessary rigid support, enhance the overall strength and toughness of the material, and improve the temperature resistance and low thermal conductivity of the material. In addition, due to the lack of Chaoger base polyimide, the intermolecular interaction force is weak, the density of the material decreases, and the sound insulation performance also deteriorates.

[0046] By comparing Example 3 and Comparative Example 3, it can be seen that the tensile strength, temperature resistance, thermal insulation and sound insulation performance of the energy-saving expandable polystyrene sound insulation board for building are worse when the composite reinforcing agent contains only choger base polyimide and does not contain acrylic acid. This is because acrylic acid provides flexible segments to improve the flexibility of the material. The material containing only choger base polyimide lacks flexible segments, has insufficient flexibility, and is prone to brittle fracture when subjected to stress, thereby reducing performance.

[0047] In summary, by using a composite reinforcing agent, a uniform and stable molecular network is formed through the flexible chain segments of acrylic acid and the rigid structure of the Chongger base polyimide, thereby improving the overall strength and toughness of the material. The excellent high temperature resistance and low thermal conductivity of the Chongger base polyimide are utilized to improve the heat resistance and thermal insulation of polystyrene, and achieve the energy-saving expandability of polystyrene in buildings. At the same time, due to the interaction between acrylic acid and Chongger base polyimide, the sound insulation performance is further improved.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A building energy-saving expandable polystyrene sound insulation board, characterized in that: The invention comprises the following components in parts by weight: 8-12 parts by weight of a composite reinforcing agent, 42-48 parts by weight of styrene, 0.1-0.5 parts by weight of benzoyl peroxide, 0.3-0.7 parts by weight of azobisisobutyronitrile foaming agent, 55-85 parts by weight of toluene, 2-6 parts by weight of silicon dioxide, 3-9 parts by weight of talc and 1-7 parts by weight of dioctyl phthalate; The composite reinforcing agent is obtained by mixing acrylic acid and Chaogel base polyimide in a mass ratio of 1:2-3.

2. The building energy-saving expandable polystyrene sound insulation board according to claim 1, characterized in that: The specific preparation method of the composite strengthener is as follows: Add the Chogel base polyimide to N,N-dimethylformamide and stir until it is completely dissolved. Add acrylic acid under stirring, and then add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide in sequence. Stir the reaction mixture at room temperature for 12-15 hours. After the reaction is completed, pour the reaction mixture into ethanol to precipitate the product, wash the precipitate, and dry it in a vacuum drying oven at 60-70°C to constant weight to obtain a composite strengthener.

3. The building energy-saving expandable polystyrene sound insulation board according to claim 2, characterized in that: The mass ratio of the Chaogel base polyimide to N,N-dimethylformamide is 1:10-15.

4. The building energy-saving expandable polystyrene sound insulation board according to claim 2, characterized in that: The mass ratio of the 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride to acrylic acid is 0.3-0.5:

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5. The building energy-saving expandable polystyrene sound insulation board according to claim 2, characterized in that: The mass ratio of the N-hydroxysuccinimide to acrylic acid is 0.2-0.6:

1.

6. The building energy-saving expandable polystyrene sound insulation board according to claim 1, characterized in that: The specific preparation method of the building energy-saving expandable polystyrene sound insulation board is as follows: The composite reinforcing agent is added to toluene and stirred until completely dissolved. Styrene is added under stirring, and silicon dioxide, talcum powder and dioctyl phthalate are added in sequence. After mixing evenly, benzoyl peroxide solution is weighed and added to the mixture. The mixture is heated to 70-75°C and stirred for 4-6 hours under nitrogen protection. The heating device is turned off and the mixture is naturally cooled to room temperature. Azobisisobutyronitrile foaming agent is added to toluene to dissolve and then added to the mixture. The azobisisobutyronitrile foaming agent and the mixture are evenly mixed using a stirrer. The mixed material is transferred to a pre-foaming machine. The pre-foamed material is transferred to a mold for final molding to obtain an energy-saving expandable polystyrene sound insulation board for buildings.

7. The building energy-saving expandable polystyrene sound insulation board according to claim 6, characterized in that: The mass fraction of the benzoyl peroxide solution is 1-3%.

8. The building energy-saving expandable polystyrene sound insulation board according to claim 6, characterized in that: The azobisisobutyronitrile foaming agent accounts for 2-5% of the mass of toluene.

9. The building energy-saving expandable polystyrene sound insulation board according to claim 6, characterized in that: The pre-foaming temperature is 90-100° C., and the pre-foaming time is 10-20 minutes.

10. The building energy-saving expandable polystyrene sound insulation board according to claim 6, characterized in that: The molding temperature is 100-120° C., and the molding time is 30-60 minutes.

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