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Polyurethane sound-absorbing cotton and preparation method thereof

A sound-absorbing cotton and polyurethane technology, applied in the chemical industry, can solve the problems of easy deformation, narrow sound-absorbing frequency range, and easy aging, and achieve stable chemical and physical properties, wide sound-absorbing frequency range, and excellent sound-absorbing performance.

Active Publication Date: 2017-10-10
ZIBO ZHENGDA ENERGY SAVING NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the traditional sound-absorbing materials, whether it is wood board, slag wool, or artificial inorganic fiber cotton made of glass wool, etc., they all have their limitations. They are too heavy, produce garbage and pollute the environment, are harmful to the human body, and the sound-absorbing effect is not good. Not fire-resistant, easy to age, easy to deform
Ordinary polyurethane sound-absorbing cotton has a very narrow sound-absorbing frequency range, and the sound-absorbing effect is good only in the high-frequency field, and the sound-insulating effect is not obvious in the middle and low frequencies.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Polyurethane sound-absorbing cotton and preparation method thereof
  • Polyurethane sound-absorbing cotton and preparation method thereof
  • Polyurethane sound-absorbing cotton and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Made from A component and B component according to the following parts by weight:

[0031] A component:

[0032]

[0033] B component:

[0034] 37 parts of modified black material;

[0035] in:

[0036] The modified black material is a modified black material with an NCO content of 28.5% prepared by reacting polyether polyol with trifunctionality and molecular weight of 700 and black material PM200 at a mass ratio of 3:3.6 at 85°C for 3 hours.

[0037] Its preparation method comprises the following steps:

[0038] Put the raw materials of component A into the mixer and mix evenly, adjust the constant material temperature to 25±2°C, adjust the speed of the agitator to 4500r / min, pour component B preheated to 25±2°C into component A and stir for 20s , Pour the mixed material into a mold preheated to 40±5°C, and demould after 8 minutes to obtain the product.

[0039] The product prepared in embodiment 1 is subjected to a performance test, and the test results are a...

Embodiment 2

[0045] Made from A component and B component according to the following parts by weight:

[0046] A component:

[0047]

[0048]

[0049] B component:

[0050] 40 parts of modified black material;

[0051] in:

[0052] The modified black material is a modified black material with an NCO content of 28.5% prepared by reacting polyether polyol with trifunctionality and molecular weight of 700 and black material PM200 at a mass ratio of 3:3.6 at 85°C for 3 hours.

[0053] Its preparation method comprises the following steps:

[0054] Put the raw materials of component A into the mixer and mix evenly, adjust the constant material temperature to 25±2°C, adjust the speed of the agitator to 5000r / min, pour component B preheated to 25±2°C into component A and stir for 15s , Pour the mixed material into a mold preheated to 40±5°C, and demould after 5 minutes to obtain the product.

[0055] The product prepared in embodiment 2 is subjected to a performance test, and the test r...

Embodiment 3

[0061] Made from A component and B component according to the following parts by weight:

[0062] A component:

[0063]

[0064] B component:

[0065] 35 parts of modified black material;

[0066] in:

[0067] The modified black material is a modified black material with an NCO content of 28.5% prepared by reacting polyether polyol with trifunctionality and molecular weight of 700 and black material PM200 at a mass ratio of 3:3.6 at 85°C for 3 hours.

[0068] Its preparation method comprises the following steps:

[0069] Put the raw materials of component A into the mixer and mix evenly, adjust the constant material temperature to 25±2°C, adjust the speed of the agitator to 4000r / min, pour component B preheated to 25±2°C into component A and stir for 25s , Pour the mixed material into a mold preheated to 40±5°C, and demould after 10 minutes to obtain the product.

[0070] The product prepared in embodiment 3 is subjected to a performance test, and the test results are ...

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Abstract

The invention belongs to the field of chemicals, and specifically relates to polyurethane acoustic wool and a preparation method thereof. The polyurethane acoustic wool is prepared from a component A and a component B, wherein the component A comprises polyether polyol of which the functionality is 2-3 and the molecular weight is 3000-5000, grafted polyether polyol of which the functionality is 2-3 and the molecular weight is 5000-6000, water, foam stabilizer, amine catalyst, cross linker and chain extender; and the component B is a modified black material. The modified black material of which the NCO content is 28.5% is prepared from polyether polyol of which the functionality is 3 and the molecular weight is 700 and a black material PM200. The prepared acoustic wool has stable chemical and physical properties, does not age or absorb water, has excellent sound absorption performance and wide sound absorption frequency range, and has good sound absorption effect in the high frequency field and excellent sound insulation effect in medium and low frequencies. The preparation method provided in the invention is simple and easy to implement, and is safe and environment-friendly in the absence of solvents.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a polyurethane sound-absorbing cotton and a preparation method thereof. Background technique [0002] At present, noise pollution has become one of the four major pollutions of the human environment, and reducing noise is a basic requirement of modern architecture. Among the traditional sound-absorbing materials, whether it is wood board, slag wool, or artificial inorganic fiber cotton made of glass wool, etc., they all have their limitations. They are too heavy, produce garbage and pollute the environment, are harmful to the human body, and the sound-absorbing effect is not good. Not fire-resistant, easy to age, easy to deform. However, ordinary polyurethane sound-absorbing cotton has a narrow sound-absorbing frequency range, and the sound-absorbing effect is only good in the high-frequency field, and the sound-insulating effect is not obvious in the middle and low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G101/00
CPCC08G18/3206C08G18/3275C08G18/4804C08G18/4808C08G18/4816C08G18/667C08G18/6674C08G18/6688C08G2350/00C08G2110/0083
Inventor 耿佃勇柴可军董伟
Owner ZIBO ZHENGDA ENERGY SAVING NEW MATERIAL
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