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Engine sound insulation pad and preparation method thereof

A sound insulation pad and engine technology, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of low flame retardancy and heat resistance, general sound insulation effect of engine sound insulation pads, and inability to meet the long-term use of sound insulation pads, etc., to achieve Excellent flame retardancy and heat resistance, good sound insulation effect

Pending Publication Date: 2022-02-18
宁波尚唯汽车饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies in the prior art, the present invention provides an engine sound insulation mat to solve the problem that the sound insulation effect of the existing engine sound insulation mat is general, its flame retardancy and heat resistance are low, and it cannot meet the sound insulation requirements of the engine under severe conditions. Problems with long-term use of the pad

Method used

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  • Engine sound insulation pad and preparation method thereof
  • Engine sound insulation pad and preparation method thereof
  • Engine sound insulation pad and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of the engine sound insulation pad of the present embodiment, it may further comprise the steps:

[0031] Step S1: Under the protection of inert gas nitrogen, the 2,4,6-tribromo-1,3,5-triazine and propenyl alcohol are stirred and dissolved in THF (tetrahydrofuran) solvent at a molar ratio of 1:1, Then add a catalyst and reflux for 24 hours at a temperature of 10°C. After distillation under reduced pressure, a triazine derivative shown in structural formula I is obtained; the 2,4,6-tribromo-1,3,5-triazine The mass ratio to the catalyst is 100:0.5; the catalyst is composed of an aqueous solution of sodium bicarbonate added with an appropriate amount of hydroxypropyl-β-cyclodextrin. The molar concentration of the sodium bicarbonate is 0.5mol / L; the added amount of the hydroxypropyl-β-cyclodextrin accounts for 0.5wt% of the total mass of the sodium bicarbonate aqueous solution;

[0032]

[0033] Step S2: Under the protection of inert gas nitrogen,...

Embodiment 2

[0039] The preparation method of the engine sound insulation pad of the present embodiment, it may further comprise the steps:

[0040] Step S1: Under the protection of inert gas nitrogen, the 2,4,6-tribromo-1,3,5-triazine and 2-methallyl alcohol were stirred and dissolved in THF ( Tetrahydrofuran (THF) solvent, then add a catalyst and reflux for 48 hours at a temperature of 10° C. After distillation under reduced pressure, a triazine derivative shown in structural formula I is obtained; the 2,4,6-tribromo-1,3 , The mass ratio of 5-triazine to the catalyst is 100:1.5; the catalyst is composed of an aqueous sodium bicarbonate solution added with an appropriate amount of hydroxypropyl-β-cyclodextrin. The molar concentration of the sodium bicarbonate is 0.8mol / L; the added amount of the hydroxypropyl-β-cyclodextrin accounts for 1wt% of the total mass of the sodium bicarbonate aqueous solution;

[0041]

[0042] Step S2: Under the protection of inert gas nitrogen, the triazine...

Embodiment 3

[0048] The preparation method of the engine sound insulation pad of the present embodiment, it may further comprise the steps:

[0049] Step S1: Under the protection of inert gas nitrogen, the molar ratio of 2,4,6-trichloro-1,3,5-triazine and 2-methyl-3-butene-1-ol is 1: 1 was stirred and dissolved in THF (tetrahydrofuran) solvent, then a catalyst was added and the temperature was 25° C. for reflux reaction for 48 hours. After vacuum distillation, the triazine derivative shown in structural formula I was obtained; the 2,4,6- The mass ratio of trichloro-1,3,5-triazine to the catalyst is 100:5; the catalyst is composed of an aqueous sodium bicarbonate solution added with an appropriate amount of hydroxypropyl-β-cyclodextrin. The molar concentration of the sodium bicarbonate is 1.2mol / L; the added amount of the hydroxypropyl-β-cyclodextrin accounts for 1.5wt% of the total mass of the sodium bicarbonate aqueous solution;

[0050]

[0051] Step S2: Under the protection of inert...

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Abstract

The invention discloses a preparation method of an engine sound insulation pad, the preparation method comprises the following steps: S1, under the protection of inert gas, carrying out reflux reaction on halogenated s-triazine and unsaturated olefin alcohol under the action of a catalyst to obtain a triazine derivative; s2, continuously carrying out heating reflux reaction on the triazine derivative and 6-isocyanato hexane-1-amine to obtain a triazine intermediate; s3, enabling the oligomer dihydric alcohol and diisocyanate to be subjected to a reaction, and obtaining a hydroxyl-terminated polyurethane prepolymer; s4, adding the triazine intermediate into the polyurethane prepolymer, and carrying out chain extension reaction to obtain a polyurethane elastomer with a main chain containing triazine; and S5, adding vinyl ferrocene into the polyurethane elastomer, and then adding an initiator and a foaming agent for foaming reaction to obtain the engine sound insulation pad. The engine sound insulation pad not only has a good sound insulation effect, but also has excellent flame retardance and heat resistance, and meets the performance requirements of long-term use of the sound insulation pad under harsh conditions of the engine.

Description

technical field [0001] The invention relates to the technical field of sound insulation pads, in particular to an engine sound insulation pad and a preparation method thereof. Background technique [0002] When the engine works as an important part of the car, it not only produces huge noise pollution, reduces the comfort of the driver and passengers, and brings driving danger in severe cases; moreover, the high temperature generated will damage the car paint on the surface of the engine compartment cover, causing car paint Accelerate aging and reduce the service life of car paint. [0003] Engine sound insulation pads play a very good role in protection, and are more and more applied to engines. Existing engine sound insulation mat materials are mainly made of resin / glass fiber, resin / cotton fiber or polyurethane; among them, sound insulation mats made of resin / glass fiber and resin / cotton fiber are heavy in weight, high in cost and cause great environmental pollution The...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F230/04C08G18/81C08G18/76C08G18/48C08J9/12B32B27/30B32B27/12B32B5/02B32B37/10B32B38/00F02B77/13C08L51/08
CPCC08F283/008C08G18/8125C08G18/7671C08G18/4854C08J9/122B32B5/18B32B5/022B32B5/245B32B37/10B32B38/0004F02B77/13C08J2351/08C08J2203/06C08J2203/08B32B2266/0278B32B2307/102B32B2307/306B32B2307/3065B32B2307/7145C08F230/04
Inventor 杜歆耘皮佳鑫
Owner 宁波尚唯汽车饰件有限公司
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