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Wide temperature domain damping polyurethane micropore elastomer material and preparation method thereof

A technology of microporous elastomer and elastomer material, which is applied in the field of polyurethane microporous elastomer material and its preparation, can solve the problems of low damping factor and limited application range, achieve excellent damping and vibration reduction performance, and meet the needs of use

Active Publication Date: 2009-09-02
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the temperature of the damping loss peak of the traditional polyurethane microcellular elastomer is lower than -20°C, its damping factor is low in the temperature range of 0°C to 40°C, which limits its application range under normal temperature conditions

Method used

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  • Wide temperature domain damping polyurethane micropore elastomer material and preparation method thereof
  • Wide temperature domain damping polyurethane micropore elastomer material and preparation method thereof

Examples

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preparation example Construction

[0045] The preparation method of the wide temperature range damping polyurethane microcellular elastomer material of the present invention comprises the steps of following order:

[0046] (1). Vacuumize polyol I and polyol II in a vacuum oven at 140°C for 2 hours, cool to room temperature, then mix the two in proportion and stir evenly.

[0047] (2). Add the chain extender, catalyst, and blowing agent to the mixture obtained in step (1), stir evenly, and adjust the temperature of the mixture to 40°C;

[0048] (3). Weigh the isocyanate and heat it to 40°C;

[0049](4). Evenly coat the inner wall of the metal mold with a release agent, dry the release agent, and heat the metal mold to 45°C;

[0050] (5). Add the isocyanate in step (3) to the mixture obtained in step (2), stir for 15 seconds at a speed of 2000 rpm with a strong mixer, and then quickly pour the stirred mixture into the mold in step (4) , seal the mold after the material fills the mold;

[0051] (6). Put the mol...

Embodiment 1

[0053] After melting polyethylene adipate polyol (CMA-1024) with a molecular weight of 1000, it was placed in a vacuum oven at 140°C for 1 hour of vacuum treatment, cooled to room temperature, and set aside. Polyoxypropylene ether polyol with a molecular weight of 4000 (abbreviated as polyether polyol, TEP-330N) was vacuum-treated in a vacuum oven at 140°C for 1 hour, cooled to room temperature, and set aside. Take 52.93 parts of TEP-330N, add 5.88 parts of CMA-1024, then add 5.29 parts of 1,4-butanediol (BD), 0.35 parts of H 2 O, 0.17 parts of A-33, 0.09 parts of T-12 to form a resin mixture. The above resin mixture was mixed evenly at a speed of 2000 rpm. Add 35.28 parts of modified MDI to the above mixture, quickly stir the mixture evenly, pour it into a mold at 45°C, mature it at 100°C for 2 hours, and demould after cooling to obtain a light yellow polyurethane microcellular elastomer material.

[0054] The prepared material has a density of 0.36 g / cm 3 , the temperatur...

Embodiment 2

[0056] The rest of this example is the same as Example 1, the difference is: take 46.39 parts of TEP-330N, add 11.60 parts of CMA-1024, and then add 5.22 parts of BD and 0.35 parts of H 2 O, 0.17 parts of A-33, 0.09 parts of T-12 to form a resin mixture. The above resin mixture was mixed evenly at a speed of 2000 rpm. Add 36.18 parts of modified MDI to the above mixture, quickly stir the mixture evenly, pour it into a mold at 45°C, mature it at 100°C for 2 hours, and demould after cooling to obtain a light yellow polyurethane microcellular elastomer material.

[0057] The prepared material has a density of 0.38 g / cm 3 , the temperature range of its damping factor (tanδ) greater than 0.2 is -28℃~+81℃, and its maximum damping factor (tanδ max ) is 0.46, tanδ max The corresponding temperature is -9.4°C, the tensile strength is 0.76MPa, and the elongation at break is 95.5%.

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Abstract

The invention provides a wide temperature domain damping polyurethane micropore elastomer material and a preparation method thereof; the formulation comprises 20 percent to 55 percent of polylol I, 5 percent to 38 percent of polylol II, 32 percent to 44 percent of isocyanate, 3.0 percent to 12.0 percent of chain extender, 0.10 percent to 0.30 percent of composite catalyst and 0.1 percent to 0.5 percent of foaming agent. The preparation method comprises the following steps: the polylol I and the polylol II are evenly mixed; the chain extender, the composite catalyst and foaming agent and other additives are added; the inner wall of a metal mold is coated with a releasing agent, heating and drying are carried out; and the mixture is added with isocyanate, is stirred with strong force, and the obtained mixture is cast into the mold, sealed, cured, cooled and demoulded so as to obtain the polyurethane micropore elastomer material. The invention adopts two types of polylol with large distance of molecular weight as polyurethane soft segment, leads the material to have excellent damping performance in the temperature range of -20 DEG C to 50 DEG C and can meet the use requirements under normal temperature condition.

Description

technical field [0001] The invention relates to a polyurethane microporous elastomer material and a preparation method thereof, in particular to a polyurethane microporous elastomer material with damping and vibration reduction properties in a wide temperature range and a preparation method thereof. Background technique [0002] Damping (or internal friction) refers to the phenomenon that the mechanical vibration energy is consumed due to internal reasons during the vibration of the material. Damping performance, also commonly referred to as vibration damping performance, is a functional property of a material. [0003] As a class of environmentally friendly products, damping materials are widely used in vibration and noise reduction in the fields of vehicles, industrial machinery, construction civil engineering, household appliances, precision instruments and military equipment. Their research and development can not only produce significant social and economic benefits, A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/08C08G101/00
Inventor 田春蓉梁书恩王建华赵秀丽蔚春蓉
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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