A wide-temperature-range water-based damping material and a preparation method thereof

Abstract

The application relates to the technical field of water-based damping materials, and discloses a wide-temperature-range water-based damping material and a preparation method thereof.The wide-temperature-range water-based damping material comprises, in mass fractions, 30-50 parts of an acrylate resin, 20-30 parts of hydroxyethyl methacrylate, 30-60 parts of polyethylene glycol, 5-10 parts of a dispersing agent, 3-10 parts of a functional filler, 0.3-1 part of a defoaming agent, 0.5-3 parts of a thickening agent, 2-5 parts of a film-forming agent and 1-10 parts of a reinforcing filler.

Description

Technical Field

[0001] This invention relates to the field of damping materials technology, specifically to a wide-temperature-range water-based damping material and its preparation method. Background Technology

[0002] With the rapid development of modern industry, transportation, and construction, vibration and noise control has become an urgent need for environmental protection and product reliability improvement. Waterborne damping coatings, due to their environmentally friendly, safe, and non-toxic properties, are gradually replacing traditional asphalt and solvent-based products, becoming an important development direction in this field.

[0003] However, the widespread application of waterborne damping materials is limited by a core technical bottleneck: the narrow effective damping temperature range. Damping performance mainly stems from the viscoelastic internal friction of the polymer matrix near the glass transition temperature (Tg). For a single polymer system, its effective damping temperature range (usually categorized by a loss factor tanδ ≥ 0.3) only covers a narrow temperature range near Tg (e.g., 20%-30% above and below). This is severely mismatched with the wide and varied temperature environments in many practical applications. For example, automotive components may be subjected to temperatures ranging from -40°C in frigid regions to over 100°C in the engine compartment. In low-temperature environments exceeding its effective temperature range, the material hardens and becomes brittle, losing its energy dissipation capacity; at high temperatures, it softens and becomes sticky, with a sharp drop in modulus, similarly leading to damping failure, which in turn accelerates structural fatigue, generates abnormal noises, and even poses safety hazards.

[0004] To address this issue, we provide a wide-temperature-range waterborne damping material and its preparation method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wide-temperature-range water-based damping material and its preparation method to solve this problem.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wide-temperature-range water-based damping material, comprising the following components by mass parts:

[0007] 30-50 parts of acrylate resin;

[0008] 20-30 parts of hydroxyethyl methacrylate;

[0009] 30-60 parts of polyethylene glycol;

[0010] 5-10 parts of dispersant;

[0011] 3-10 parts of functional filler;

[0012] Defoamer 0.3~1 part;

[0013] Thickener 0.5-3 parts;

[0014] 2-5 parts of film-forming agent;

[0015] 1-10 parts of reinforcing filler.

[0016] Further improvements include 10-15 parts of a fungicide.

[0017] Further improvement: The functional filler is mica powder or graphite powder.

[0018] A further improvement: the reinforcing filler is glass fiber and wood fiber.

[0019] A further improvement: the dispersant is deionized water.

[0020] Further improvement: The film-forming agent is COASOL 290 PLUS from Chemoxy, UK.

[0021] Further improvement: Use DL-174 as the defoamer.

[0022] A further improvement: the thickener is DN-2078.

[0023] This application also provides a wide-temperature-range waterborne damping material, comprising the following components by mass parts:

[0024] 40 parts of acrylate resin;

[0025] 26 parts of hydroxyethyl methacrylate;

[0026] 50 parts polyethylene glycol;

[0027] 6 parts dispersant;

[0028] 6 parts of functional filler;

[0029] 0.5 parts of defoamer;

[0030] Thickener 2 parts;

[0031] 3 parts film-forming agent;

[0032] 1-10 parts of reinforcing filler.

[0033] This application also provides a method for preparing the wide-temperature-range aqueous damping material as described in any one of the above claims, the method comprising:

[0034] S1. Add acrylate resin, hydroxyethyl methacrylate, polyethylene glycol, defoamer, thickener and film-forming agent in the above proportions, and stir at a speed of 400-500 r / min. After the addition is completed, continue stirring at the same speed for 30 min to obtain a mixture.

[0035] S2. Next, add the functional filler and reinforcing filler to the mixture in S1 according to the ratio, and stir at 400-800 r / min for 30 min to obtain the mixture;

[0036] S3. Then add the above dispersant to the mixture from step 2 and continue to stir and mix at a speed of 400-800 r / min to obtain the water-based damping coating.

[0037] Compared with the prior art, the present invention provides a wide-temperature-range water-based damping material, which has the following beneficial effects:

[0038] The water-based damping material provided by this invention uses acrylic acid, hydroxyethyl methacrylate, and polyethylene glycol as key components. Through the synergistic effect between these components, it effectively overcomes the technical shortcomings of traditional water-based damping materials, such as narrow damping temperature range and difficulty in simultaneously achieving mechanical and damping performance. This results in the following significant and beneficial technical effects:

[0039] This invention achieves a balance between an ultrawide effective damping temperature range and a high damping factor. Polyethylene glycol, as a flexible long chain, is introduced into the polymer system, and its chain segment motion provides multiple relaxation mechanisms across a wide temperature range. Simultaneously, the carboxyl groups of acrylic acid and the hydroxyl groups of hydroxyethyl methacrylate jointly construct a high-density dynamic hydrogen bond network. This synergy between "flexible chain segment relaxation" and "dynamic physical crosslinking points" allows the material to maintain a high loss factor (tanδ > 0.3) over a temperature range far exceeding the glass transition region of a single polymer (e.g., a wide temperature range from below 0°C to above 100°C), thereby efficiently dissipating vibrational energy across a broad spectrum.

[0040] This significantly improves the overall mechanical properties and durability of the material. The active hydroxyl groups of hydroxyethyl methacrylate act as chemical crosslinking sites, reacting with other components in the system to form a moderately crosslinked network, greatly enhancing the material's cohesive strength, resilience, and creep resistance. The strong polar carboxyl groups provided by acrylic acid significantly enhance the material's adhesion to various substrates (especially metals), preventing failure due to coating peeling. This combination ensures that the material maintains excellent mechanical integrity and long-term reliability even under high damping conditions.

[0041] The processing applicability and structural stability of the material have been optimized. The strong hydrophilicity of acrylic acid effectively improves the storage stability and application leveling properties of the polymer emulsion or dispersion. The introduction of polyethylene glycol not only toughens the material but also acts as an internal plasticizer, preventing it from becoming brittle at low temperatures. The synergistic effect of these three components gives the final product excellent film-forming properties, flexibility, and resistance to environmental aging, making it suitable for various application processes such as spraying and troweling, and meeting the application requirements under complex working conditions.

[0042] In summary, this invention, through the molecular design of the aforementioned ternary system, achieves multiple technical advantages such as "widening the temperature range, enhancing energy consumption, strengthening the structure, and facilitating construction" with simple and efficient components. It provides an environmentally friendly and highly competitive solution to address the urgent need for wide-temperature-range high-performance damping coatings in the industrial sector. Detailed Implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The following are specific embodiments.

[0045] Example 1

[0046] A wide-temperature-range waterborne damping material comprises, by weight parts: 30g acrylate resin, 20g hydroxyethyl methacrylate, 30g polyethylene glycol, 5g deionized water, 3g mica powder, 0.3g DL-174, 0.5g DN-2078, 2g COASOL 290 PLUS, and 1g glass fiber.

[0047] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0048] S1. Add 30g of acrylate resin, 20g of hydroxyethyl methacrylate, 30g of polyethylene glycol, 0.3g of DL-174, 0.5g of DN-2078 and 2g of COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0049] S2. Next, add 3g of mica powder and 1g of glass fiber to the mixture in S1 in sequence, and stir at 400-800r / min for 30min to obtain a mixture;

[0050] S3. Then add the above 5g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0051] Example 2

[0052] A wide-temperature-range waterborne damping material, by mass parts, comprises the following components: 50g acrylate resin, 30g hydroxyethyl methacrylate, 60g polyethylene glycol, 10g deionized water, 10g mica powder, 1g DL-174, 3g DN-2078, 5g COASOL290 PLUS, and 10g wood fiber.

[0053] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0054] S1. Add 50g acrylate resin, 30g hydroxyethyl methacrylate, 60g polyethylene glycol, 1g DL-174, 3g DN-2078 and 5g COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0055] S2. Next, add 10g of mica powder and 10g of wood fiber to the mixture in S1 in sequence, and stir at 400-800r / min for 30min to obtain a mixture;

[0056] S3. Then add the above 10g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0057] Example 3

[0058] A wide-temperature-range waterborne damping material comprises, by weight, the following components: 40g acrylate resin, 25g hydroxyethyl methacrylate, 50g polyethylene glycol, 8g deionized water, 6g mica powder, 2g DL-174, 2g DN-2078, 3g COASOL290 PLUS, and 6g wood fiber.

[0059] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0060] S1. Add 40g acrylate resin, 25g hydroxyethyl methacrylate, 50g polyethylene glycol, 0.8g DL-174, 2g DN-2078 and 3g COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0061] S2. Next, add 6g of mica powder and 6g of wood fiber to the mixture in S1 in sequence, and stir at 400-800r / min for 30min to obtain a mixture;

[0062] S3. Then add the above 8g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0063] Example 4

[0064] A wide-temperature-range waterborne damping material, by mass parts, comprises the following components: 40g acrylate resin, 25g hydroxyethyl methacrylate, 40g polyethylene glycol, 6g deionized water, 6g graphite, 0.8g DL-174, 1.8g DN-2078, 2.5g COASOL290 PLUS, and 6.5g wood fiber.

[0065] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0066] S1. Add 40g of acrylate resin, 25g of hydroxyethyl methacrylate, 40g of polyethylene glycol, 0.8g of DL-174, 1.8g of DN-2078 and 2.5g of COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0067] S2. Next, add 6g of graphite and 6.5g of wood fiber to the mixture in S1 in sequence, and stir at 400-800r / min for 30min to obtain a mixture;

[0068] S3. Then add the above 6g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0069] Example 5

[0070] A wide-temperature-range waterborne damping material, by mass parts, comprises the following components: 35g acrylate resin, 27g hydroxyethyl methacrylate, 45g polyethylene glycol, 4g deionized water, 4g graphite, 0.7g DL-174, 2.3g DN-2078, 3g COASOL290 PLUS, and 7g wood fiber.

[0071] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0072] S1. Add 35g acrylate resin, 27g hydroxyethyl methacrylate, 45g polyethylene glycol, 0.7g DL-174, 2.3g DN-2078 and 3g COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0073] S2. Next, add 4g of graphite and 7g of wood fiber to the mixture in S1 in sequence, and stir at 400-800r / min for 30min to obtain a mixture;

[0074] S3. Then add the above 4g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0075] Example 6

[0076] A wide-temperature-range waterborne damping material comprises, by weight parts: 30g acrylate resin, 22g hydroxyethyl methacrylate, 35g polyethylene glycol, 4g deionized water, 5g mica powder, 0.5g DL-174, 2.5g DN-2078, 2.5g COASOL 290 PLUS, and 5g wood fiber.

[0077] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0078] S1. Add 30g of acrylate resin, 22g of hydroxyethyl methacrylate, 35g of polyethylene glycol, 0.5g of DL-174, 2.5g of DN-2078 and 2.5g of COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0079] S2. Next, add 5g of mica powder and 5g of wood fiber to the mixture in S1 in sequence, and stir at 400-800r / min for 30min to obtain a mixture;

[0080] S3. Then add the above 4g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0081] Example 7

[0082] A wide-temperature-range waterborne damping material comprises, by weight parts: 30g acrylate resin, 22g hydroxyethyl methacrylate, 35g polyethylene glycol, 4g deionized water, 5g mica powder, 0.5g DL-174, 2.5g DN-2078, 2.5g COASOL 290 PLUS, and 5g wood fiber.

[0083] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0084] S1. Add 30g of acrylate resin, 22g of hydroxyethyl methacrylate, 35g of polyethylene glycol, 0.5g of DL-174, 2.5g of DN-2078 and 2.5g of COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0085] S2. Next, add 5g of mica powder, 5g of wood fiber, and 5g of fungicide (the fungicide is Proxel from Lonza Shanghai International Trading Co., Ltd.). TM CLF was added sequentially to the mixture of S1, and the mixture was stirred at 400-800 r / min for 30 min to obtain the mixture.

[0086] S3. Then add the above 4g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0087] Example 8

[0088] A wide-temperature-range waterborne damping material comprises, by weight parts: 30g acrylate resin, 22g hydroxyethyl methacrylate, 35g polyethylene glycol, 4g deionized water, 5g mica powder, 0.5g DL-174, 2.5g DN-2078, 2.5g COASOL 290 PLUS, and 5g wood fiber.

[0089] The preparation method of the wide-temperature-range waterborne damping material according to the above components includes the following steps:

[0090] S1. Add 30g of acrylate resin, 22g of hydroxyethyl methacrylate, 35g of polyethylene glycol, 0.5g of DL-174, 2.5g of DN-2078 and 2.5g of COASOL 290 PLUS in sequence, and stir at 400-500r / min. After the addition is completed, continue stirring at the same speed for 30min to obtain a mixture.

[0091] S2. Next, add 5g of mica powder, 5g of wood fiber, and 10g of fungicide (the fungicide is Proxel from Lonza Shanghai International Trading Co., Ltd.). TM CLF was added sequentially to the mixture of S1, and the mixture was stirred at 400-800 r / min for 30 min to obtain the mixture.

[0092] S3. Then add the above 4g of deionized water to the mixture in step 2, and continue to stir and mix at a speed of 400-800r / min to obtain the water-based damping coating.

[0093] The composite loss factor of the waterborne damping coatings prepared in Examples 1-8 at different temperatures was tested according to the method of HG / T5058-2016, and the results are shown in Table 1.

[0094] Table 1: Composite loss factor at different temperatures for each embodiment

[0095] Table 1

[0096] Example 1 0.3 0.25 0.19 0.22 0.16 0.25 0.31 0.19 0.18 0.11 Example 2 0.3 0.15 0.13 0.21 0.11 0.25 0.23 0.18 0.16 0.13 Example 3 0.2 0.05 0.15 0.22 0.13 0.25 0.13 0.19 0.11 0.11 Example 4 0.2 0.17 0.19 0.25 0.15 0.25 0.33 0.16 0.11 0.14 Example 5 0.15 0.15 0.15 0.22 0.23 0.25 0.23 0.19 0.16 0.10 Example 6 0.25 0.25 0.19 0.12 0.16 0.25 0.33 0.15 0.12 0.15 Example 7 0.15 0.15 0.29 0.22 0.19 0.25 0.13 0.19 0.16 0.13 Example 8 0.2 0.16 0.19 0.25 0.16 0.24 0.33 0.22 0.13 0.15

[0097] As shown in Table 1, the wide-temperature-range waterborne damping materials prepared in Examples 1-8 of this invention, through the molecular design of the above-mentioned ternary system, achieve multiple technical advantages of "widening the temperature range, enhancing energy dissipation, strengthening the structure, and facilitating construction" with simple and efficient components. This provides an environmentally friendly and highly competitive solution to address the urgent need for wide-temperature-range high-performance damping coatings in the industrial sector.

[0098] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wide-temperature-range waterborne damping material, characterized in that, Based on parts by mass, it includes the following components: 30-50 parts of acrylate resin; 20-30 parts of hydroxyethyl methacrylate; 30-60 parts of polyethylene glycol; 5-10 parts of dispersant; 3-10 parts of functional filler; Defoamer 0.3~1 part; Thickener 0.5-3 parts; 2-5 parts of film-forming agent; 1-10 parts of reinforcing filler.

2. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: It also includes 10-15 parts of bactericide.

3. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: The functional filler is mica powder or graphite powder.

4. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: The reinforcing filler is glass fiber or wood fiber.

5. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: The dispersant is deionized water.

6. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: The film-forming agent is COASOL 290 PLUS from Chemoxy in the UK.

7. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: The defoamer is DL-174.

8. The wide-temperature-range waterborne damping material according to claim 1, characterized in that: The thickener is DN-2078.

9. A wide-temperature-range waterborne damping material, characterized in that, Based on parts by mass, it includes the following components: 40 parts of acrylate resin; 26 parts of hydroxyethyl methacrylate; 50 parts polyethylene glycol; 6 parts dispersant; 6 parts of functional filler; 0.5 parts of defoamer; Thickener 2 parts; 3 parts film-forming agent; 1-10 parts of reinforcing filler.

10. A method for preparing a wide-temperature-range aqueous damping material as described in any one of claims 1-9, characterized in that, The preparation method includes: S1. Add acrylate resin, hydroxyethyl methacrylate, polyethylene glycol, defoamer, thickener and film-forming agent in the above proportions, and stir at 400-500 r / min. After the addition is completed, continue stirring at the same speed for 30 minutes to obtain a mixture. S2. Next, add the functional filler and reinforcing filler to the mixture in S1 according to the ratio, and stir at 400-800 r / min for 30 min to obtain the mixture; S3. Then add the above dispersant to the mixture from step 2 and continue to stir and mix at a speed of 400-800 r / min to obtain the water-based damping coating.