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Polyester type polyurethane damping material and preparation method

A technology of polyester polyurethane and damping materials, which is applied in the field of polyester polyurethane damping materials and its preparation, can solve the problems of low loss factor of damping alloys, unsatisfactory damping performance, low elastic modulus, etc., and achieve good mechanical properties and high Effect of loss factor and damping temperature range wide

Inactive Publication Date: 2009-08-19
HEBEI ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These polymer viscoelastic materials have a high loss factor, but the elastic modulus is too low and the mechanical properties are poor, and the loss factor of the damping alloy with high mechanical properties is too low to meet the requirements of damping performance.

Method used

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  • Polyester type polyurethane damping material and preparation method
  • Polyester type polyurethane damping material and preparation method
  • Polyester type polyurethane damping material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Room temperature vulcanized polyester polyurethane damping material

[0040] (1) Add 100g of polyneopentyl adipate (PNA-2000) into a three-necked flask equipped with a stirrer and a thermometer, dehydrate at 120-140°C for 2 hours under vacuum -0.095MPa, and then cool down to 50 ℃, add 17.7g of TDI-100, slowly raise the temperature to 80±5℃ and react for 2h, then degas at 85~90℃ under vacuum-0.095MPa to prepare the prepolymer and seal it for later use;

[0041] (2) Take 100g of prepolymer at 85°C, add 11.2g of MOCA melted at 100-120°C, stir evenly and pour it into a hot glass mold coated with a release agent. Place the sample at room temperature for 7 days to vulcanize, and test its various properties, see figure 1 and Table 1.

[0042]Table 1 Mechanical properties of room temperature vulcanized PU damping materials

[0043]

Embodiment 2

[0045] (1) same as embodiment 1;

[0046] (2) The vulcanization condition was changed to 100°C×4h, and then placed at room temperature for seven days to test various properties, and the others were the same as in Example 1. See figure 2 ,Table 2.

[0047] Table 2 Mechanical properties of high temperature vulcanized PU damping material

[0048]

Embodiment 3

[0050] (1) Add 100g of polyneopentyl adipate (PNA-1000) into a three-necked flask equipped with a stirrer and a thermometer, dehydrate at 120-140°C for 2 hours under vacuum-0.095MPa, then cool down to 50°C, Add 36.0g of TDI-100, slowly raise the temperature to 80±5°C for 2 hours, degas at 85-90°C under vacuum-0.095MPa, and seal the prepolymer for use;

[0051] (2) Take 100g of prepolymer at 85°C, add 19.9g of MOCA melted at 100-120°C, stir evenly and pour it into a hot glass mold coated with a release agent. Place the sample at room temperature for 7 days to vulcanize, and test its various properties, see image 3 ,table 3.

[0052] Table 3 Mechanical properties of PU damping materials

[0053]

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Abstract

The invention provides a polyester polyurethane damping material with dimethyl structure with the same carbon number on main chain and a preparation method thereof. The preparation method comprises the following steps: A. allowing polyester glycol dehydrated in vacuum to react with diisocyanate to synthesize a prepolymer; and B. allowing the prepolymer to react with a chain extender or block and graft to synthesize the polyester polyurethane damping material with dimethyl structure with the same carbon number on the main chain; choosing 3,3'-dichloro-4,4'-diaminodiphenylmethane, 3,5- dimethythiotoluene diamine, 1,4-butanediol or trimethylolpropane as the chain extender for room temperature vulcanization. The polyester polyurethane damping material has good thermal stability, acid and alkali resistance, hydrolytic resistance, weatherability and high damping property. Meanwhile, the polyester main chain contains ester group with strong polarity, and forms a plurality of hydrogen bonds with urethane group to improve intermolecular acting force, thus the polyester polyurethane has good mechanical property. High-performance damping materials for use under different temperature can be obtained by adjusting position of damping peak by changing molecular weight of the polyester glycol and by adding liquid packing. The preparation method is simple with low energy consumption.

Description

technical field [0001] The invention relates to a polyester polyurethane damping material and a preparation method thereof, and belongs to the technical field of synthesis of organic polymer materials or synthesis of shock-absorbing and noise-reducing materials. Background technique [0002] Polyurethane is a polymer damping material that has been studied more at home and abroad and has practical value. This is because polyurethane itself has a large number of hydrogen bonds, a certain degree of microphase separation structure, and a high damping factor. The advantage of polyurethane as a damping material is that it can obtain a damping material with a wide temperature range and a high loss factor by adjusting the ratio of soft and hard segments. The usual polyester polyurethane damping material is a series of soft and hard polymers composed of polyether or polyester as the soft segment and diisocyanate and diamine or diol chain extender as the hard segment. The ratio of so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65C08G18/10C08G18/42C08G18/32
Inventor 李彦涛刘德居刘会强杨淑兰周海军张晓蕾
Owner HEBEI ENERGY RES INST
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