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Polyurethane elastomer material with wide temperature range and high damping capacity and preparation method thereof

A polyurethane elastomer and wide temperature range technology, applied in the field of polyurethane elastomer, can solve the problems of poor low-temperature damping performance and inability to meet the use requirements in cold seasons, achieve excellent damping performance, broaden the application field, and improve damping performance.

Inactive Publication Date: 2016-11-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent application CN102898606A discloses a suspension hindered phenolic polyurethane damping material and its preparation method. The polyurethane material prepared by this method can produce a continuous platform, widen the temperature range, and the effective temperature range can reach 93°C, but its low temperature damping performance is relatively low Poor, the damping factor tanδ is less than 0.3 at -10°C, which cannot meet the requirements of cold seasons in some areas

Method used

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  • Polyurethane elastomer material with wide temperature range and high damping capacity and preparation method thereof
  • Polyurethane elastomer material with wide temperature range and high damping capacity and preparation method thereof
  • Polyurethane elastomer material with wide temperature range and high damping capacity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035](1) Add 40 parts of polyester diol to a three-necked flask equipped with a condensing reflux tube, a stirrer and a thermometer; seal the device, turn on the heating device and raise the temperature to 105°C, stir (250r / min), and turn on the oil type Vacuum with a vacuum pump and dry for 2 hours at a pressure of 1 MPa.

[0036] (2) After the temperature drops to room temperature, turn off the vacuum pump and turn on N 2 , N 2 Add 9 parts of isophorone diisocyanate under protection, stir (300r / min), heat up to 70°C within a few minutes, add 0.3mL of 50ppm catalyst dibutyltin dilaurate dropwise, keep warm for 2 hours, stop the reaction, and you can get Polyurethane prepolymers of polyester diols, N 2 The vibe is preserved.

[0037] (3) Take the measured polyurethane prepolymer in a three-necked flask, blow nitrogen, add 14 parts of HDI trimer, and stir (350r / min), the system starts to become transparent and clear.

[0038] (4) Weigh 10 parts of 2,2'‐diaminodiphenyl disu...

Embodiment 2

[0040] (1) Add 40 parts of polyester diol to a three-necked flask equipped with a condensing reflux tube, a stirrer and a thermometer; seal the device, turn on the heating device and raise the temperature to 110°C, stir (200r / min), and turn on the oil type Vacuum the vacuum pump and dry within 1MPa pressure for 2.5h.

[0041] (2) After the temperature drops to room temperature, turn off the vacuum pump and feed N 2 , N 2 Add 9 parts of isophorone diisocyanate under protection, stir (300r / min), heat up to 75°C within a few minutes, add 0.5mL of 50ppm catalyst dibutyltin dilaurate dropwise, keep warm for 3 hours, stop the reaction, and you can Polyurethane prepolymers to obtain polyester diols, N 2 The vibe is preserved.

[0042] (3) Take the measured polyurethane prepolymer in a three-necked flask, blow nitrogen, add 14 parts of HDI trimer, stir (350r / min), and the system starts to become transparent and clear.

[0043] (4) Weigh 10 parts of 3,3'‐dihydroxydiphenyl disulfide...

Embodiment 3

[0045] (1) In a three-necked flask equipped with a condensing reflux tube, a stirrer and a thermometer, add 40 parts of polyester diol; seal the device, turn on the heating device and raise the temperature to 115°C, stir (200r / min), and turn on the oil Vacuum with a vacuum pump and dry for 2.5 hours at a pressure of 1MPa.

[0046] (2) After the temperature drops to room temperature, turn off the vacuum pump and turn on N 2 , N 2 Add 9 parts of isophorone diisocyanate under protection, stir (300r / min), heat up to 70°C within a few minutes, add 0.4mL of 50ppm catalyst dibutyltin dilaurate dropwise, stop the reaction after keeping warm for 3 hours, and you can get Polyurethane prepolymers of polyester diols, N 2 The vibe is preserved.

[0047] (3) Take the measured polyurethane prepolymer in a three-necked flask, pass nitrogen gas, then add 14 parts of HDI trimer, and stir (350r / min), the system starts to become transparent and clear.

[0048] (4) Weigh 10 parts of 4,4'‐diami...

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Abstract

The invention discloses a polyurethane elastomer material with the wide temperature range and the high damping capacity and a preparation method thereof. The preparation method comprises the steps that polyester diol and a diisocyanato raw material are adopted to react with each other to prepare a polyurethane prepolymer, the polyurethane prepolymer is poured into a polytetrafluoroethylene plate mold by taking an HDI trimer as a cross-linking agent and taking a raw material containing dynamic reversible disulfide bonds as a chain extender to remove bubbles, and heat preservation and curing molding are conducted. According to the polyurethane elastomer designed and synthesized based on the molecular structure, the damping factor tan<delta> is larger than 0.3 when the temperature of the damping material exceeds the temperature range of 220 DEG C (minus 50 DEG C-178 DEG C), and the damping factor tan<delta> is larger than 0.4 when the temperature of the damping material exceeds the temperature range of 200 DEG C (minus 44 DEG C-165 DEG C); the polyurethane elastomer material has the good high-low temperature damping property and can be expected to be widely applied to the damping and noise reducing aspects in the fields of building materials, automobiles, national defense, aerospace and the like.

Description

technical field [0001] The invention relates to a polyurethane elastomer, in particular to a polyurethane elastomer material with wide temperature range and high damping and a preparation method thereof. Background technique [0002] While the development of modern industry has brought great convenience to the production and life of human society, the harm caused by mechanical vibration and noise to human is becoming more and more serious. Therefore, there are higher requirements for shock and noise reduction technology, not only to meet the needs of various occasions, but also to have a good damping effect. At present, the use of damping materials and technologies is one of the most effective methods to control vibration and noise. Due to their viscoelastic properties, polymer materials have been widely used in the field of damping. [0003] Wide temperature range high damping material requires at least a temperature range above 80 °C, and its damping factor tanδ>0.3. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/75C08G18/66C08G18/42C08G18/32
CPCC08G18/3863C08G18/42C08G18/6651C08G18/755C08G18/792
Inventor 卢珣李翰模王巍巍
Owner SOUTH CHINA UNIV OF TECH
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