Modified polyurethane foam and preparation method and applications thereof

A polyurethane and foam technology is applied in the field of resource utilization of foam materials to achieve the effects of improved mechanical properties and mechanical properties, low experimental consumables, and high resource utilization.

Inactive Publication Date: 2019-06-18
肇庆市珈旺环境技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the first object of the present invention is to provide a modified polyurethane foam material with good sound absorption properties at high frequencies, medium and low frequencies, and its preparation method and application. Foam material is used as a noise reduction material in power capacitors, which can effectively solve the problem of power capacitors and low-frequency noise generated by power capacitors, and can effectively play a shockproof effect

Method used

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  • Modified polyurethane foam and preparation method and applications thereof
  • Modified polyurethane foam and preparation method and applications thereof
  • Modified polyurethane foam and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Preparation of polyurethane foam

[0059] According to the ratio, polyurethane black material (forming the hard segment of polyurethane foam) and polyurethane white material (forming the soft segment of polyurethane foam) are mixed under stirring at 250 rpm to obtain a polyurethane foam prepolymer, and then the polyurethane Foaming prepolymer The polyurethane foaming prepolymer is poured into a mold, and left to stand at room temperature for 10 minutes, demolded to obtain a sample, and the sample is aged at room temperature for 24 hours to obtain a polyurethane foam.

[0060] In this comparative example, adding polyurethane black material, polyurethane white material mass ratio is 2:8, 5:5, 6:4, 7:3, 8:2 respectively, finally obtains 5 groups of polyurethane foams, the obtained polyurethane foam The mass ratio of the hard and soft segments in the foam is 2:8, 5:5, 6:4, 7:3, and 8:2 respectively. Observe whether the shape of the polyurethane foam with the above ratio of ...

Embodiment 2

[0062] Preparation of Modified Polyurethane Foam

[0063] Mix polyurethane black material, polyurethane white material, expanded perlite, and rice husk ash according to the ratio under stirring at 250 rpm to obtain a polyurethane foam prepolymer, and then make the polyurethane foam prepolymer polyurethane foam prepolymer Pour the body into the mold, let it stand at room temperature for 10 minutes, then add the hydroxyl-terminated polyepichlorohydrin solution, then place it in an oven at 110°C for 24 hours, demould to obtain a sample, and mature the sample for 24 hours at room temperature to obtain the modified polyurethane foam. bubble body.

[0064] The mass ratio of the polyurethane black material and the polyurethane white material is 5:5.

[0065] The dosage of described expanded perlite, the dosage of rice husk ash and the dosage of terminal hydroxyl polyepichlorohydrin are divided into three groups: in the first group, the dosage of expanded perlite is 5% of the polyure...

Embodiment 3

[0069] Preparation of Modified Polyurethane Foam

[0070] Mix polyurethane black material, polyurethane white material, expanded perlite, and rice husk ash according to the ratio under stirring at 250 rpm to obtain a polyurethane foam prepolymer, and then make the polyurethane foam prepolymer polyurethane foam prepolymer Pour the body into the mold, let it stand at room temperature for 10 minutes, then add the hydroxyl-terminated polyepichlorohydrin solution, then place it in an oven at 110°C for 24 hours, demould to obtain a sample, and mature the sample for 24 hours at room temperature to obtain the modified polyurethane foam. bubble body.

[0071] The mass ratio of the polyurethane black material and the polyurethane white material is 6:4.

[0072] The amount of expanded perlite and the amount of rice husk ash are divided into three groups: the amount of expanded perlite in the first group is 5% of the quality of the polyurethane foam material, and the amount of rice husk ...

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Abstract

The invention discloses a modified polyurethane foam and a preparation method and applications thereof. Expanded perlite, rick husk ash particles, and hydroxyl terminated poly(epoxy chloropropane) areadopted to carry out modification to obtain modified polyurethane foam; the acoustic property and mechanical properties are all improved; and the modified polyurethane foam is a light and vibration-proof material having a good performance of absorbing medium-low frequency sound and can be used to prepare a sound absorption board of a power capacitor. The modified polyurethane foam is manufacturedaccording to an optimal ratio; the average low/medium frequency sound absorbing performance is obviously enhanced and can reach 0.54; and the average noise insulation factor reaches 12.13 dB. The foam mainly absorbs the capacitor noise with frequencies of 500Hz, 600Hz, and 700Hz, and the sound absorbing coefficient is obviously increased. The wastes are converted into valuable resources, and theeconomic benefits and environmental benefits are increased.

Description

technical field [0001] The invention relates to a modified polyurethane foam and its preparation method and application, and belongs to the technical field of resource utilization of foam materials. Background technique [0002] In recent years, with the development of long-distance power transmission technology, the noise problem generated by power filter equipment in HVDC converter stations, especially power capacitor equipment, has become more and more serious, which has seriously affected the daily production and life of surrounding residents. , and gradually aroused extensive attention of researchers. In the power HVDC converter station, when the capacitor unit is working, the current load imposed on it includes both power frequency and high-order harmonics. The noise generated by the vibration of the corresponding capacitor unit also has the characteristics of fundamental waves and harmonics. According to the report of the International Conference on Large Power Grids...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L63/00C08K7/26C08K3/26C08J9/00
Inventor 侯浩波雷杰妮曾建王小书王燕彭精智
Owner 肇庆市珈旺环境技术研究院
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