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A kind of silicone type polyurethane damping material and preparation method thereof

A damping material, polyurethane technology, applied in the field of organic polymer material synthesis, can solve problems such as low elastic modulus and unsuitable damping materials

Active Publication Date: 2021-04-27
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic solvents are used in its preparation, and the elastic modulus is low, so it is not suitable for use as a damping material.

Method used

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  • A kind of silicone type polyurethane damping material and preparation method thereof
  • A kind of silicone type polyurethane damping material and preparation method thereof
  • A kind of silicone type polyurethane damping material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Synthesis of terminal alkenyl ether alcohols:

[0034] Add 116.16g of allyl alcohol and 4g of KOH into a 2L stainless steel autoclave, vacuumize for 10 minutes, fill with nitrogen for 5 minutes, then repeat the vacuum and nitrogen filling twice, then vacuumize, heat up to 110°C, and add the measured Methyl propylene oxide 576.8g, the feeding time of the feeding pump is 2h, the pressure in the reactor is controlled not to exceed 0.7MPa, after the feeding is completed, the reaction temperature is controlled at 110-115°C, and the reaction is 5h. After there is no pressure in the reactor, keep warm After 0.5 h, the temperature was lowered to 70° C. and vacuum was applied for 1 h, the temperature was lowered and the material was filtered to obtain 679.1 g of light yellow terminal alkenyl ether alcohol with a yield of 98%.

[0035] 2) Synthesis of diols with the same carbon dimethyl structure and the same silicon dimethyl structure:

[0036] Add 141.16g of terminal hydrog...

Embodiment 2

[0040]In the step 3) the diisocyanate added in the preparation process of silicone polyurethane damping material is IPDI, the addition amount is 44.7g, the chain extender is MDBA, the dosage is 36.4g, and the rest are the same as in Example 1. The tensile strength, brittleness temperature, loss factor and damping temperature range of the obtained damping material are listed in Table 1.

Embodiment 3

[0042] Said step 3) the preparation process of organosilicon polyurethane damping material, add said step 2) 20g of diol synthesized, polytetrahydrofuran diol (molecular weight 1000) 20g, TDI addition is 41.1g, chain extender is MDBA , Add-on 39.5g, all the other are with embodiment 1. The tensile strength, brittleness temperature, loss factor and damping temperature range of the obtained damping material are listed in Table 1.

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Abstract

An organosilicon type polyurethane damping material and a preparation method thereof, the damping material is synthesized from methyl propylene oxide, the main chain of the molecule contains a homocarbodimethyl structure and a homosilyl dimethyl structure, and an enol and methyl alcohol are used. Synthesize terminal alkenyl ether alcohol with propylene oxide, and then synthesize diol with same carbodimethyl structure and same silyl dimethyl structure with double-ended hydrogen silicone oil with the same silicon dimethyl structure, and then use this raw material with diisocyanate Polyurethane prepolymer is synthesized, the prepolymer is reacted with a chain extender, and the silicone type polyurethane damping material is obtained after curing. The damping material prepared by the invention has good mechanical properties and damping properties, and meanwhile, the low temperature brittleness resistance, heat resistance and hydrolysis resistance of the material are improved by the introduction of organic silicon. Thereby expanding its application in cutting-edge weapons and equipment, aerospace vehicles, navigation, construction, environmental protection and other fields.

Description

technical field [0001] The invention relates to an organosilicon type polyurethane damping material and a preparation method thereof, belonging to the field of synthesis of organic polymer materials. Background technique [0002] Polyurethane damping material is a polymer damping material with practical value that has been studied earlier and more at home and abroad. Polyurethane damping material is a block polymer composed of soft and hard segments, which has a large number of hydrogen bonds and a certain degree of microphase separation, and can obtain high loss factor in a wide temperature range by adjusting the structure and ratio of soft and hard segments damping material. Polyurethane damping materials can convert part of the kinetic energy into heat energy and dissipate it when the structure is deformed, reduce the resonance amplitude of the structure, increase fatigue life and reduce structural noise, so that it can be used in cutting-edge weaponry, aerospace vehicle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/65C08G18/61C08G18/48C08G18/12C08G18/32C08G77/46
CPCC08G18/12C08G18/4009C08G18/4808C08G18/4825C08G18/4854C08G18/61C08G77/46C08G2350/00C08G18/3814C08G18/324
Inventor 周海军李彦涛陈孝起周萌萌张晓蕾刘德居杨淑兰
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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