Polyurethane composite acoustic material and preparation method thereof

A polyurethane and acoustic technology, applied in the field of polyurethane composite acoustic material and its preparation, can solve problems such as poor low-frequency sound absorption performance, and achieve the effects of low cost, increased degradation ability, and wide application range

CN107312150AActive Publication Date: 2017-11-03JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-11-03

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Abstract

The invention belongs to acoustic packaging materials in the field of sound absorption material design, particular relates to a polyurethane composite acoustic material and a preparation method thereof. The material is prepared from the following components: 60 parts of polyether polyol 330N, 40 parts of polyether polyol 3630, 30 parts of 4,4 diphenylmethane diisocyanate, 3 parts of foaming agent deionized water, 3 parts of foaming agent triethanolamine, 5 parts of foaming agent dichlorofluoroethane, namely HCFC-141b, 0.05 part of catalyst A1, 1 part of catalyst A33, 1.8 parts of foam stabilizer and 0.2 to 1.5 parts of pine needle fragments with 1mm to 2mm or 3mm to 4mm or 5mm to 6mm. According to the polyurethane composite acoustic material and the preparation method thereof, a low-frequency sound absorption characteristic of polyurethane is improved by adding the pine needle fragments, the degradation capability of the polyurethane is increased through the addition of the pine needle fragments, and environmental pollution is reduced, thereby a problem that sound-absorbing materials at the prior art have poor sound absorption performance at the low frequency is solved.
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Description

technical field

[0001] The invention belongs to an acoustic packaging material in the field of sound-absorbing material design, in particular to a polyurethane composite acoustic material and a preparation method thereof. Background technique

[0002] With the continuous improvement of people's living standards, the demand for cars has gradually increased from the initial means of transportation to a comfortable mobile space. If people are in a noisy environment for a long time, people will have symptoms such as tinnitus, dreaminess, palpitation, irritability, and even hearing loss and deafness. It is not uncommon to see traffic accidents indirectly caused by vehicle noise. Therefore, improvement of interior acoustic packaging is particularly important for reducing interior noise. Polyurethane composite material is the most commonly used sound-absorbing material for interior acoustic packaging materials, and has a good sound-absorbing effect in the high-frequency stage, but...

Examples

preparation example Construction

[0027] A preparation method of polyurethane composite acoustic packaging material, the preparation method may further comprise the steps:

[0028] refer to figure 1 , step 1, 60 parts of polyether polyol 330N, 40 parts of polyether polyol 3630, 3 parts of foaming agent deionized water, 3 parts of foaming agent triethanolamine, 5 parts of foaming agent monofluorodichloroethane HCFC-141b, 0.05 parts of catalyst A1, 1 part of catalyst A33 and 1.8 parts of foam stabilizer silicone oil were mixed in a plastic cup, stirred with an electric mixer at a speed of 1200 rpm at room temperature, and stirred for 5 to 8 minutes to obtain mixture A;

[0029] Step 2. Add 0.2 to 1.5 parts of 1mm to 2mm pine needle fragments, or 0.2 to 1.5 parts of 3mm to 4mm pine needle fragments or 0.2 to 1.5 parts of 5mm to 6mm pine needle fragments into mixture A, and then use an electric mixer to stir fully at a speed of 1200rmp Mixture B was obtained in 5 minutes to 8 minutes;

[0030] Step 3. Add 30 par...

Embodiment 1

[0034] A polyurethane composite acoustic packaging material, the acoustic packaging material is composed of the following components by weight ratio:

[0035]

[0036] The preparation method of the acoustic packaging material is as follows:

[0037] Step 1. Make 5 parts of the formula with exactly the same components and contents: 60 grams of polyether polyol 330N, 40 grams of polyether polyol 3630, 3 grams of deionized water, 3 grams of triethanolamine, 5 grams of HCFC-141b, 0.05 grams A1, 1 gram of A33, 1.8 grams of silicone oil were mixed and added to 5 identical plastic cups, and stirred at room temperature with an electric stirrer at a speed of 1200rmp for 5-8 minutes to obtain mixture A;

[0038] Step 2. Add 0.2g, 0.5g, 0.8g, 1.0g and 1.5g of 1-2mm pine needle fragments into the 5 plastic cups in step 1 respectively, and then use electric mixer to stir fully at 1200rmp for 5-8 minutes respectively get mixture B;

[0039] Step 3. Add 5 parts of 30g of 4,4-diphenylmet...

Embodiment 2

[0043] A polyurethane composite acoustic packaging material, the acoustic packaging material is composed of the following components by weight ratio:

[0044]

[0045] The preparation method of the acoustic packaging material is as follows:

[0046] Step 1. Make 5 parts of the formula with exactly the same components and contents: 60 grams of polyether polyol 330N, 40 grams of polyether polyol 3630, 3 grams of deionized water, 3 grams of triethanolamine, 5 grams of HCFC-141b, 0.05 grams A1, 1 gram of A33, 1.8 grams of silicone oil were mixed and added to 5 identical plastic cups, and stirred at room temperature with an electric stirrer at a speed of 1200rmp for 5-8 minutes to obtain mixture A;

[0047] Step 2. Add 0.2g, 0.5g, 0.8g, 1.0g and 1.5g of 3-4mm pine needle fragments into the 5 plastic cups in step 1, and then use an electric mixer at a speed of 1200rmp to fully stir for 5-8 minutes get mixture B;

[0048] Step 3. Add 5 parts of 30g of 4,4-diphenylmethane diisocy...