Multifunctional polyurethane thermal insulation material for fish tank and preparation method thereof

Abstract

The application belongs to the technical field of polyurethane, and particularly relates to a multifunctional polyurethane thermal insulation material for fish tanks and a preparation method thereof. The multifunctional polyurethane thermal insulation material for fish tanks comprises component A and component B. The component A comprises polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D and a composite catalyst. The component B comprises modified MDI. The functionality of the polyether polyol A is 5, and the hydroxyl value is 380 mgKOH / g. The functionality of the polyether polyol B is 4.2, and the hydroxyl value is 380 mgKOH / g. The functionality of the polyether polyol C is 5, and the hydroxyl value is 460 mgKOH / g. The functionality of the polyester polyol D is 4, and the hydroxyl value is 400 mgKOH / g. The composite catalyst is A-33, PC-41 and TMR-2. The multifunctional polyurethane thermal insulation material for fish tanks has excellent thermal insulation performance, significantly reduces volatile odor, and the preparation method is also provided.

Description

Technical Field

[0001] This invention belongs to the field of polyurethane technology, specifically relating to a multifunctional polyurethane insulation material for aquariums and its preparation method. Background Technology

[0002] With the rapid development of the ornamental aquarium industry, people have placed higher demands on the stability and aesthetics of aquarium environments. Currently, there are two main types of aquarium insulation methods: one is to wrap the tank with inorganic insulation materials such as glass wool and rock wool; the other is to rely on a heater for continuous operation. However, these traditional methods have significant drawbacks. First, materials such as glass wool and rock wool have high density, significantly increasing the overall weight of the aquarium, and are inconvenient to install, making it difficult to fit tightly into the curved or irregularly shaped structures commonly found in modern aquariums. Their insulation performance is limited, and their high thermal conductivity fails to effectively block heat loss, forcing the heating equipment to operate at high loads for extended periods, resulting in high energy consumption. In addition, these materials have monotonous colors (mostly gray-white or yellowish-brown), making it difficult to coordinate with diverse home décor or aquarium landscaping styles, seriously affecting the viewing experience, and they lack color customization capabilities. Second, relying solely on a heater for direct heating allows heat to easily dissipate rapidly into the environment through the tank walls, resulting in low energy efficiency. At the same time, heaters can cause localized excessively high water temperatures in the aquarium while distant areas remain too cold, creating a harmful temperature gradient that poses a risk of temperature stress to aquatic organisms.

[0003] Polyurethane foam, as a high-performance insulation material, is widely used in construction, cold chain logistics, and other fields, and its introduction offers new possibilities for aquarium insulation. However, its direct application in home aquariums still faces unique challenges. On the one hand, to meet the installation requirements of aquariums, the material needs to have low density (lightweight), good dimensional stability, and mechanical strength to withstand certain environmental stresses. On the other hand, home aquariums are often placed in enclosed or semi-enclosed living spaces such as living rooms and studies, which places stringent requirements on the material's environmental friendliness and odor characteristics. Catalysts such as amines (e.g., PC8, BDMA) used in traditional polyurethane formulations tend to continuously release irritating odors after preparation, and long-term volatilization may affect indoor air quality and have potential negative impacts on the health of keepers and sensitive aquatic organisms. Therefore, developing a polyurethane system with low odor characteristics is one of the key issues that must be addressed for its widespread application in indoor aquariums.

[0004] Existing technologies include research aimed at improving the performance of polyurethane materials. For example, Chinese patent CN114940738A discloses a polyurethane composition that uses a specific ratio of polyether polyols (including high-functionality sucrose / sorbitol-based, amine initiator-based, vegetable oil-based, and low-functionality small molecule initiator-based polyols), a composite catalyst (a combination of foaming, gelling, and trimerizing catalysts), and a composite foaming agent system of pentane, hydrofluoroolefins, and propane, aiming to regulate material properties. While this technical solution designs the foaming system, catalyst combination, and polyol compatibility, its research and development goal is not specifically targeted at the aquarium insulation application scenario. In particular, it has not yet proposed a systematic solution for the low-odor characteristic, which is crucial in the home indoor environment, and for how to balance the multi-functional integrated requirements of lightweight, high insulation efficiency, dimensional stability, and decorative aesthetics (such as customizable colors). Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a multifunctional polyurethane insulation material for aquariums, which has excellent heat preservation performance, structural stability and lightweight, while significantly reducing volatile odors and allowing for flexible customization of appearance and color, so as to meet the complex needs of modern family aquarium keeping for energy conservation, environmental protection, ecological health and aesthetic decoration. The present invention also provides its preparation method.

[0006] The aforementioned multifunctional polyurethane insulation material for aquariums comprises component A and component B. Component A, by weight, includes: 50-60 parts polyether polyol A, 20-30 parts polyether polyol B, 10-20 parts polyether polyol C, 5-15 parts polyester polyol D, and 0.4-2 parts composite catalyst; component B includes modified diphenylmethane diisocyanate. The polyether polyol A has a functionality of 5-6 and a hydroxyl value of 370-390 mgKOH / g; the polyether polyol B has a functionality of 4-6 and a hydroxyl value of 360-400 mgKOH / g; the polyether polyol C has a functionality of 4-7 and a hydroxyl value of 420-470 mgKOH / g; and the polyester polyol D has a functionality of 4-6 and a hydroxyl value of 380-420 mgKOH / g. The composite catalyst is a mixture of catalysts A-33, PC-41, TMR-2, and A-201.

[0007] Polyether polyol A has a viscosity of 6000~9000 mPa at 25℃. s, Polyether polyol B has a viscosity of 2000~3000 mPa at 25℃. s, polyether polyol C has a viscosity of 12000~16000 mPa at 25℃. s, Polyester polyol D has a viscosity of 8000~12000 mPa at 25℃. s.

[0008] Polyether polyol A is R5118G, polyether polyol B is R6205, polyether polyol C is R6207, and polyester polyol D is 4400T.

[0009] The mass ratio of component A to component B is 1:1.2 to 1:1.3.

[0010] Component A, by weight, also includes 2-2.5 parts foam stabilizer, 1.5-2 parts closed-cell agent, 11-13 parts physical foaming agent, 1.7-2 parts auxiliary chemical foaming agent, and 0.2-0.8 parts color paste.

[0011] The foam stabilizer is L-580, which maintains the stability of the foam structure, reduces the open cell ratio, and improves the thermal insulation effect.

[0012] The closed-cell agent is ZH-100, which improves the closed-cell rate of the material and enhances its thermal insulation and waterproof performance.

[0013] The physical foaming agent is cyclopentane, which is environmentally friendly and low in toxicity. After foaming, it forms a fine closed-cell structure, reducing the material density and having no irritating odor. The colorant is an environmentally friendly aquarium-specific colorant (purchased from Dongguan Caijian Chemical Co., Ltd.), which is water-resistant and does not fade. It has good compatibility with polyurethane substrates and releases no odor. It is available in a variety of colors, including ocean blue, grass green, and light cyan.

[0014] The auxiliary chemical foaming agent reacts with water and isocyanate to generate carbon dioxide gas, which works synergistically with cyclopentane to optimize the cell distribution, improve the material's thermal insulation performance and lightweight properties, and has no additional odor or pollution.

[0015] Catalysts A-33, PC-41, TMR-2, and A-201 are formulated in the following weight ratios: 0.12~0.3 parts, 0.2~0.3 parts, 0.06~0.15 parts, and 0.1~0.25 parts, respectively. A-33 and A-201 are low-odor amine catalysts, PC-41 promotes the reaction between isocyanate and water, and TMR-2 enhances the efficiency of the cross-linking reaction. The synergistic effect of these four catalysts significantly reduces the release of irritating odors from the catalyst system while precisely controlling the foaming rate and ensuring uniform cell size. The cured material has an odor level ≤2 (refer to GB / T35465-2017), meeting the requirements for use in enclosed home environments. Traditional catalysts (PC8, BDMA, PC-41 blend): PC8 and BDMA are conventional amine catalysts. Although they can promote the foaming reaction, they easily release irritating odors, resulting in an odor level ≥3 after curing, making them unsuitable for enclosed home environments.

[0016] The preparation method of the aforementioned multifunctional polyurethane insulation material for aquariums includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D, composite catalyst, foam stabilizer, closed cell agent, color paste, and auxiliary chemical foaming agent are added to the mixing tank in sequence and stirred at room temperature; then physical foaming agent is added and stirring is continued. After passing the inspection, it is component A. (2) Component B: Modified diphenylmethane diisocyanate was selected for use; (3) Molding process: Mix component A and component B, stir and mix, pour into mold for foaming, and cure at room temperature after foaming to obtain multifunctional polyurethane insulation material for aquariums.

[0017] Step (1) Stir at room temperature for 0.2~0.4h.

[0018] Step (3) Stir and mix for 10~15 seconds.

[0019] This invention addresses the core requirements of low weight and high insulation performance. It also allows for customized colors through the incorporation of colorant, while maintaining mechanical strength, dimensional stability at high and low temperatures, and low odor. This makes it suitable for use in enclosed environments such as homes, ensuring a healthy indoor environment and the well-being of aquarium organisms. The polyurethane material itself has extremely low density, far lower than traditional glass wool and rock wool. When applied to aquariums, it does not significantly increase the overall weight of the tank, facilitating installation and relocation. It easily conforms to curved surfaces, corners, and other irregular structures of aquariums, making installation convenient. Its internal closed-cell honeycomb structure effectively blocks heat transfer, has low thermal conductivity, and provides excellent insulation, significantly reducing water temperature loss, lowering energy consumption of heating equipment, and maintaining long-term water temperature stability.

[0020] This invention addresses two key issues. First, it allows for the direct incorporation of specialized color pastes during polyurethane preparation. These color pastes exhibit excellent compatibility with the polyurethane substrate, ensuring no impact on the material's thermal insulation performance or mechanical structure. A variety of colors, such as ocean blue, grass green, and light cyan, can be customized to suit different aquarium decor styles and aquarium needs, preserving the insulation function while enhancing the overall aesthetic harmony of the aquarium. This addresses the limitation of traditional insulation materials' limited color options. Second, it optimizes the catalyst system by employing a composite catalyst of A-33, PC-41, TMR-2, and A-201. Compared to traditional catalyst systems containing PC8 and BDMA, this system significantly reduces the release of irritating odors during material preparation and use, while maintaining foaming efficiency and cross-linking effects. This meets the needs of use in enclosed environments such as homes, preventing adverse effects on humans and aquatic life.

[0021] Polyurethane substrate itself has a certain mechanical strength. By optimizing the proportion of polyether polyol, isocyanate and additives in the formula, the compressive and tear resistance of the material can be further improved, avoiding damage caused by collision or squeezing during installation or use. At the same time, the addition of special stabilizers enhances the dimensional stability of the material in high and low temperature environments, preventing the material from shrinking or expanding due to changes in aquarium water temperature (4-32℃, the common breeding temperature range) or fluctuations in ambient temperature, ensuring that the insulation layer is tightly attached to the aquarium wall, without falling off or peeling.

[0022] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention uses a specific composite catalyst system of A-33, PC-41, TMR-2 and A-201 to replace traditional amine catalysts such as PC8 and BDMA. While accurately controlling the foaming reaction and ensuring the uniform and fine structure of the foam, it significantly reduces the release of volatile and irritating odors during the preparation and curing process of the material, meets the requirements of use in closed environments such as homes, effectively protects the health and safety of indoor environments and aquatic organisms, and solves the problem that existing thermal insulation materials have a strong odor and are not suitable for closed spaces.

[0023] (2) This invention innovatively introduces aquarium-specific environmentally friendly colorant with good compatibility with polyurethane substrate into component A, realizing flexible customization of the appearance color of the insulation material. Users can choose from a variety of colors such as ocean blue, grass green, and light cyan according to the decoration style of the aquarium. While ensuring that the insulation performance and mechanical strength of the material are not sacrificed, the overall aesthetic coordination and ornamental value of the aquarium are greatly improved, breaking through the technical limitations of traditional insulation materials with single color and poor decoration.

[0024] (3) This invention successfully prepared a polyurethane material with lightweight properties, excellent thermal insulation, high closed-cell ratio, and good structural stability by optimizing the combination of polyols, using cyclopentane as a physical foaming agent in conjunction with water as a chemical foaming agent, and combining it with a closed-cell agent and a foam stabilizer. This material has low density, making it easy to install and move; low thermal conductivity, which can effectively reduce heat loss from the aquarium and save energy; at the same time, it has good compressive and tear resistance and dimensional stability under high and low temperature environments, and can fit tightly into the irregular structure of the aquarium. It will not fall off or warp after long-term use, and its overall performance is excellent. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments.

[0026] Polyether polyol A (R5118G): Functionality of 5, hydroxyl value of 380mgKOH / g, viscosity of 6000~9000mPa·s at 25℃, purchased from Yinuowei New Materials Co., Ltd. As the main polyether, it forms the basic skeleton structure of the foam. It uses a mixture of sucrose and small molecule diols (such as ethylene glycol, propylene glycol, etc.) as the initiator, with propylene oxide (PO) as the main component and ethylene oxide (EO) as the oxidized olefin.

[0027] Polyether polyol B (R6205): with a functionality of 4.2, a hydroxyl value of 380 mg KOH / g, and a viscosity of 2000~3000 mPa·s at 25℃, was purchased from Yinuowei New Materials Co., Ltd. It provides good flowability for foam formation, with propylene glycol as the core initiator, propylene oxide (PO) as the main component, and ethylene oxide (EO) as the end-capping agent for oxidized olefins.

[0028] Polyether polyol C (R6207): with a functionality of 5, a hydroxyl value of 460 mg KOH / g, and a viscosity of 12000~16000 mPa·s at 25℃, purchased from Yinuowei New Materials Co., Ltd., plays a role in enhancing crosslinking density and improving mechanical strength in the formulation system, while also helping to balance the viscosity of the system and optimize the uniformity of the cell structure. It uses propylene glycol as the core initiator, propylene oxide (PO) as the main component, and ethylene oxide (EO) as the end-capping agent for oxidized olefins.

[0029] Polyester polyol D (4400T): Functionality is 4, hydroxyl value is 400mgKOH / g, viscosity at 25℃ is 8000~12000mPa·s, purchased from Yinuowei New Materials Co., Ltd., the initiator is o-toluene diamine (OTDA), propylene oxide (PO) is the main component, and ethylene oxide (EO) is used as the end-capping agent for oxidized olefins.

[0030] Foam stabilizer (L-580): purchased from Evonik Industries; Cage-closing agent (ZH-100): purchased from Shanghai Zhanhua Chemical Co., Ltd.; The color pastes used in Examples 1-3 and Comparative Example 2 were environmentally friendly color pastes specifically for aquariums (purchased from Dongguan Caijian Chemical Co., Ltd.).

[0031] A-33: Purchased from Evonik Industries; PC-41: Purchased from Evonik Industries; TMR-2: Purchased from Evonik Industries; PC8: Purchased from Evonik Industries; BDMA: Acquired from Evonik Industries; A-201: Purchased from Momentive (Shanghai) Trading Co., Ltd.; Ordinary industrial color paste (blue): purchased from Dongguan Caijian Chemical Co., Ltd.; Modified MDI: Purchased from Yantai Wanhua Polyurethane Co., Ltd. (Wanhua PM200).

[0032] Example 1 The aforementioned multifunctional polyurethane insulation material for aquariums comprises component A and component B. Component A, by weight, includes: 50 parts polyether polyol A (R5118G), 30 parts polyether polyol B (R6205), 15 parts polyether polyol C (R6207), 5 parts polyester polyol D (4400T), a composite catalyst (A-33: 0.3 parts, PC-41: 0.2 parts, TMR-2: 0.15 parts, A-201: 0.1 parts), 2 parts foam stabilizer (L-580), 1.5 parts closed-cell agent (ZH-100), 0.8 parts blue pigment, 12 parts cyclopentane, and 2 parts water. Component B includes modified MDI.

[0033] The preparation method of the aforementioned multifunctional polyurethane insulation material for aquariums includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D, composite catalyst (A-33, PC-41, TMR-2, A-201 compound), foam stabilizer, closed cell agent, color paste and water are added to the stirred tank in sequence and stirred at room temperature for 0.3h; then cyclopentane is added and stirring is continued for 0.5h. After passing the inspection, it is component A.

[0034] (2) Selection of component B: Modified MDI was selected.

[0035] (3) Molding process: Mix component A and component B at a weight ratio of 1:1.2, stir at 4500r / min for 12s until the mixture is uniform, pour into a mold in the shape of a fish tank for foaming, and cure at room temperature for 10h after foaming to obtain a multifunctional polyurethane insulation material for fish tanks.

[0036] Example 2 The aforementioned multifunctional polyurethane insulation material for aquariums comprises component A and component B. Component A, by weight, includes: 55 parts polyether polyol A (R5118G), 20 parts polyether polyol B (R6205), 10 parts polyether polyol C (R6207), 15 parts polyester polyol D (4400T), (A-33: 0.2 parts, PC-41: 0.3 parts, TMR-2: 0.1 parts, A-201: 0.15 parts) composite catalyst, 2.5 parts foam stabilizer (L-580), 2 parts closed-cell agent (ZH-100), 0.5 parts grass green pigment, 13 parts cyclopentane, and 1.7 parts water. Component B includes modified MDI.

[0037] The preparation method of the aforementioned multifunctional polyurethane insulation material for aquariums includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D, composite catalyst (A-33, PC-41, TMR-2, A-201 compound), foam stabilizer, closed cell agent, color paste and water are added to the stirred tank in sequence and stirred at room temperature for 0.2h to ensure that the color paste is uniformly dispersed without precipitation; then cyclopentane is added and stirring is continued for 0.5h. After passing the inspection, it is component A.

[0038] (2) Selection of component B: Modified MDI was selected.

[0039] (3) Molding process: Mix component A and component B at a weight ratio of 1:1.2, stir at 4000r / min for 10s until the mixture is uniform, pour into a mold in the shape of a fish tank for foaming, and cure at room temperature for 10h after foaming to obtain a multifunctional polyurethane insulation material for fish tanks.

[0040] Example 3 The aforementioned multifunctional polyurethane insulation material for aquariums comprises component A and component B. Component A, by weight, includes: 60 parts polyether polyol A (R5118G), 20 parts polyether polyol B (R6205), 10 parts polyether polyol C (R6207), 10 parts polyester polyol D (4400T), a composite catalyst (A-33: 0.12 parts, PC-41: 0.24 parts, TMR-2: 0.06 parts, A-201: 0.25 parts), 2 parts foam stabilizer (L-580), 1.8 parts closed-cell agent (ZH-100), 0.2 parts light blue pigment, 11 parts cyclopentane, and 2 parts water. Component B includes modified MDI.

[0041] The preparation method of the aforementioned multifunctional polyurethane insulation material for aquariums includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D, composite catalyst (A-33, PC-41, TMR-2, A-201 compound), foam stabilizer, closed cell agent, color paste and water are added to the stirred tank in sequence and stirred at room temperature for 0.4h to ensure that the color paste is uniformly dispersed without precipitation; then cyclopentane is added and stirring is continued for 0.5h. After passing the inspection, it is component A.

[0042] (2) Selection of component B: Modified MDI was selected.

[0043] (3) Molding process: Mix component A and component B at a weight ratio of 1:1.3, stir at 5000r / min for 15s until the mixture is uniform, pour into a mold in the shape of a fish tank for foaming, and cure at room temperature for 10h after foaming to obtain a multifunctional polyurethane insulation material for fish tanks.

[0044] Comparative Example 1 The polyurethane insulation material comprises component A and component B. Component A, by weight, includes: 65 parts polyether polyol A (R5118G), 20 parts polyether polyol B (R6205), 10 parts polyether polyol C (R6207), 5 parts polyester polyol D (4400T), (PC8: 0.4 parts, BDMA: 0.2 parts, PC-41: 0.1 parts) composite catalyst, 2 parts foam stabilizer (L-580), 1.5 parts closed-cell agent (ZH-100), 0.8 parts ordinary industrial color paste (blue), 12 parts cyclopentane, and 1.5 parts water. Component B includes ordinary MDI.

[0045] The preparation method of the polyurethane thermal insulation material includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D, composite catalyst (PC8, PC-41, BDMA compound), foam stabilizer, closed cell agent, ordinary industrial color paste (blue) and water are added to the stirred tank in sequence and stirred at room temperature for 0.3h; then cyclopentane is added and stirring is continued for 0.5h. After passing the inspection, it is component A.

[0046] (2) Component B selection: ordinary MDI.

[0047] (3) Molding process: Mix component A and component B at a weight ratio of 1:1.2, stir at 4500r / min for 12s until uniformly mixed, pour into a custom-made fish tank-shaped mold for foaming, and cure at room temperature for 10h after foaming to obtain polyurethane insulation material. The odor level of the cured material is ≥4.

[0048] Comparative Example 2 The polyurethane insulation material comprises component A and component B. Component A, by weight, includes: 55 parts polyether polyol A (R5118G), 25 parts polyether polyol B (R6205), 12 parts polyether polyol C (R6207), 8 parts polyester polyol D (4400T), (PC8: 0.4 parts, BDMA: 0.2 parts, A-33: 0.1 parts) composite catalyst, 2 parts foam stabilizer (L-580), 0.8 parts blue pigment, 12 parts cyclopentane, and 1.5 parts water. Component B includes ordinary MDI.

[0049] The preparation method of the polyurethane thermal insulation material includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyester polyol D, composite catalyst (PC8, A-33, BDMA compound), foam stabilizer, blue pigment, and water are added to the stirred tank in sequence and stirred at room temperature for 0.3h; then cyclopentane is added and stirring is continued for 0.5h. After passing the inspection, it is component A.

[0050] (2) Selection of component B: ordinary MDI is selected.

[0051] (3) Molding process: Mix component A and component B at a weight ratio of 1:1.2, stir at 4500r / min for 12s until uniformly mixed, pour into a custom-made fish tank-shaped mold for foaming, and cure at room temperature for 10h after foaming to obtain polyurethane insulation material. The odor level of the cured material is ≥3.

[0052] The materials prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests. The test items included density, thermal conductivity (insulation effect), compressive strength, high and low temperature dimensional change rate (-5℃ freezing for 24h, 40℃ high temperature for 24h), odor level (refer to GB / T35465-2017, level 1 is odorless, level 5 is strong irritating odor), and color stability (1 month soaking). The test results are shown in Table 1.

[0053] Table 1 Test Results

[0054] The test results show that Examples 1-3 maintain significant advantages: firstly, the thermal conductivity is stably controlled between 0.0200-0.0205 W / (m²). K), as low as 0.020 W / (m The first is a polyether polyol with excellent thermal insulation properties and a density maintained at 27.8-29.2 kg / m³, while its lightweight characteristics remain unaffected. This is attributed to the uniform closed-cell structure formed by the synergistic combination of cyclopentane and water. Secondly, thanks to the highly cross-linked properties of the rationally combined polyether polyols, the compressive strength remains at 190-198 kPa, meeting the mechanical requirements of practical use. Thirdly, the low-odor catalyst system and special colorant offer stable performance, with an odor level of 2 and no fading after one month of immersion. The comparative sample has a lower closed-cell rate, higher thermal conductivity, and significantly inferior odor and mechanical properties due to catalyst defects and insufficient formulation.

Claims

1. A multifunctional polyurethane insulation material for fish tanks, characterized in that: It includes component A and component B, wherein component A comprises, by weight, 50-60 parts of polyether polyol A, 20-30 parts of polyether polyol B, 10-20 parts of polyether polyol C, 5-15 parts of polyether polyol D, and 0.4-2 parts of composite catalyst; component B includes modified diphenylmethane diisocyanate. Polyether polyol A is R5118G, polyether polyol B is R6205, polyether polyol C is R6207, and polyether polyol D is 4400T. The composite catalyst is a mixture of catalysts A-33, PC-41, TMR-2, and A-201, with the following weight ratios: 0.12~0.3 parts, 0.2~0.3 parts, 0.06~0.15 parts, and 0.1~0.25 parts, respectively. Component A, by weight, further includes 2-2.5 parts foam stabilizer, 1.5-2 parts closed-cell agent, 11-13 parts physical foaming agent, 1.7-2 parts auxiliary chemical foaming agent, and 0.2-0.8 parts color paste; the foam stabilizer is L-580, the closed-cell agent is ZH-100, the physical foaming agent is cyclopentane, and the auxiliary chemical foaming agent is water.

2. The multifunctional polyurethane insulation material for aquariums according to claim 1, characterized in that: The mass ratio of component A to component B is 1:1.2 to 1:1.

3.

3. A method for preparing a multifunctional polyurethane insulation material for aquariums as described in claim 1 or 2, characterized in that: Includes the following steps: (1) Preparation of component A: Polyether polyol A, polyether polyol B, polyether polyol C, polyether polyol D, composite catalyst, foam stabilizer, closed cell agent, color paste, and auxiliary chemical foaming agent are added to the mixing tank in sequence and stirred at room temperature; then physical foaming agent is added and stirring is continued. After passing the inspection, it is component A. (2) Component B: Modified diphenylmethane diisocyanate was selected for use; (3) Molding process: Mix component A and component B, stir and mix, pour into mold for foaming, and cure at room temperature after foaming to obtain multifunctional polyurethane insulation material for aquariums.

4. The preparation method of the multifunctional polyurethane insulation material for aquariums according to claim 3, characterized in that: Step (1) Stir at room temperature for 0.2~0.4h.

5. The preparation method of the multifunctional polyurethane insulation material for aquariums according to claim 4, characterized in that: Step (3) Stir and mix for 10~15 seconds.

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