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High-performance polyurethane damping material and one-step production method thereof

A damping material, polyurethane technology, applied in the field of polyurethane, can solve the problems of increased viscosity of the material system, uneven damping performance, uneven dispersion of fillers, etc., to achieve high elongation, good wear resistance, and a large adjustable range of hardness Effect

Active Publication Date: 2019-12-03
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of damping fillers, graft modification, or the introduction of damping structural units can easily lead to increased viscosity of the material system, uneven dispersion of fillers, etc., resulting in problems such as decreased material strength, increased hardness, and uneven damping performance.

Method used

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  • High-performance polyurethane damping material and one-step production method thereof
  • High-performance polyurethane damping material and one-step production method thereof
  • High-performance polyurethane damping material and one-step production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dehydration of polyols: Dehydrate 400 g of polycaprolactone diols with a number-average molecular weight of 2000 at 95-100° C. for 2 hours under a vacuum of -0.1 MPa.

[0026] (2) Preparation of elastomer: polycaprolactone diol, chain extender 1 and catalyst (using propylene glycol to prepare triethylenediamine content as 33% solution) with number average molecular weight of 2000 after dehydration, according to Proportion 100g / 26.6g / 0.05g After mixing evenly, keep the temperature at 70°C, add 40g of MDI, mix evenly and defoam, pour into a mold at 120°C, demould for 60 minutes, vulcanize for 20 hours at 100°C, and measure after 7 days at room temperature performance. The properties of the obtained materials are shown in Table 2.

Embodiment 2

[0028] (1) Dehydration of polyols: 400 g of polycaprolactone diols with a number average molecular weight of 1000 are dehydrated at 95 to 100 ° C for 2 hours under a vacuum degree of -0.1 MPa, and are discharged for later use; 400 g of polycaprolactone diols with a number average molecular weight of 550 Caprolactone trihydric alcohol is dehydrated at 95-100°C and vacuum degree -0.1MPa for 2 hours, and the material is discharged for later use;

[0029] (2) Preparation of elastomer: polycaprolactone dibasic alcohol after dehydration, polycaprolactone tribasic alcohol, chain extender 2, catalyst (use the triethylenediamine content of propylene glycol preparation to be the solution of 33%) ) according to the ratio of 100 / 31.2 / 19.7 / 0.08, mix evenly, keep the temperature at 70°C, add 55g of MDI, mix evenly and defoam, pour it into a mold at 120°C, demould after 120min, vulcanize at 100°C for 20h, and place it at room temperature Performance was measured after 7 days. The properties...

Embodiment 3

[0031] (1) Dehydration of polyols: 400 g of polytetrahydrofuran diols with a number-average molecular weight of 2000 were dehydrated for 2 hours at 95-100° C. and a vacuum degree of -0.1 MPa, and discharged for later use.

[0032] (2) Preparation of elastomer: mix polytetrahydrofuran diol with a number average molecular weight of 2000 after dehydration, chain extender 1, and catalyst T-12 in a proportion of 100g / / 13.8g / 0.0g8, and keep the temperature at 80°C , add 18.5g TDI, mix evenly and defoam, pour it into a mold at 120°C, demould after 120min, vulcanize at 100°C for 24h, leave it at room temperature for 7 days, then test its performance. The properties of the obtained materials are shown in Table 2.

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Abstract

The invention discloses a high-performance polyurethane damping material and a one-step production method thereof. The high-performance polyurethane damping material is produced from the following rawmaterials in percentage by weight: 10%-80% of macromolecular polyol, 15%-70% of isocyanate, 5%-20% of a chain extender, 0%-2% of a catalyst and 0-10% of other assistants, a sum of the weight percentages of the components is 100%, and the high-performance polyurethane damping material is characterized in that the chain extender has a structural formula as shown in the specification, wherein R is an alkyl group, a branched alkyl group, a naphthene base, an aromatic base or a substituent group-containing aromatic base; and R1, R2, R3 and R4 are H, alkyl groups, branched alkyl groups, naphthene bases, aromatic bases or substituent group-containing aromatic bases. No damping filler is introduced into the material, graft modification is avoided, and no damping structure units are introduced into the material, so that the material system viscosity is not improved. Moreover, the high-performance polyurethane damping material has excellent comprehensive mechanical performance, and the dampingperformance of the material is improved, so that the requirements of a production technology and the strength of the material in certain special vibration attenuation working environments are met. Theone-step production technology is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a polyurethane material with high strength and high loss factor and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, there are more and more frequencies and places where vibration and noise appear, and the vibration and noise generated by high automation are flooding every corner of life. Vibration, impact and noise will cause serious harm to social production and social life. On the one hand, severe vibration directly affects the normal operation of instruments and meters, and brings many outstanding problems to electronic devices, instruments and meters, engineering structures and environmental protection. Problems, on the other hand, vibration, noise, etc. seriously interfere with people's work and life, and endanger human health. Therefore, vibration reduction and noise reduction is an important probl...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/7671C08G18/7614C08G18/6655C08G18/6688C08G18/4277C08G18/4854C08G18/4238C08G18/3275
Inventor 石雅琳苏丽丽徐庆辉尹璐
Owner LIMING RES INST OF CHEM IND
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