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Mixed soft segment type polyurethane damping material and preparation method thereof

A damping material, polyurethane technology, applied in the field of polyurethane elastomer material preparation, can solve the complicated preparation process and other problems, achieve simple process, increase glass transition temperature, and improve the effect of damping factor

Active Publication Date: 2020-12-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method combines a variety of methods to improve the damping factor, and the damping factor is indeed significantly improved, but the preparation process is relatively complicated.

Method used

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  • Mixed soft segment type polyurethane damping material and preparation method thereof
  • Mixed soft segment type polyurethane damping material and preparation method thereof
  • Mixed soft segment type polyurethane damping material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 23.80g of hydroxyl-terminated polybutadiene-acrylonitrile copolymer (HTBN, hydroxyl value 0.6305, molecular weight about 3500) and 30.03g polypropylene glycol (PPG, molecular weight 2000) into a four-necked flask, at 110°C, Vacuumize at 80r / min to remove water for 2h, cool down to 60°C, add 16.62g of toluene-2,4-diisocyanate (TDI-100) under nitrogen atmosphere, stabilize for half an hour, then raise the temperature to 75°C, stir at 240r / min for 3h , lower the temperature to 60°C and add 6.49g of 1,4-butanediol to stabilize for 10min, raise the temperature to 75°C for 2h, and finally put it in a vacuum oven at 100°C for 12h to prepare a mixed soft segment polyurethane damping material. The hardness, tensile strength, Young's modulus, loss factor and damping temperature range of the obtained damping material are listed in Table 1.

Embodiment 2

[0045] Add 19.66g of hydroxyl-terminated polybutadiene (HTPB, hydroxyl value 0.7644, molecular weight about 4500) and 17.48g polypropylene glycol (molecular weight: 2000) into a four-necked flask, vacuumize at 110°C and 80r / min. Water for 2 hours, cool down to 60°C, add 11.34g toluene-2,4-diisocyanate (TDI-100) under nitrogen atmosphere, stabilize for half an hour, then raise the temperature to 75°C, stir at 240r / min for 3h, cool down to 60°C, add 4.58 g 1,4-butanediol was stabilized for 10 minutes, heated to 75°C for 2 hours, and finally placed in a vacuum oven at 100°C for 12 hours to prepare a mixed soft-segment polyurethane damping material. The hardness, tensile strength, Young's modulus, loss factor and damping temperature range of the obtained damping material are listed in Table 1.

Embodiment 3

[0047] Add 15.92g of hydroxyl-terminated polybutadiene (HTPB, hydroxyl value 0.7644, molecular weight about 4500) and 21.22g polypropylene glycol (molecular weight: 2000) into a four-necked flask, and vacuumize at 110°C and 80r / min. Water for 2 hours, cool down to 60°C, add 11.39g of toluene-2,4-diisocyanate (TDI-100) under nitrogen atmosphere, stabilize for half an hour, then raise the temperature to 75°C, stir at 240r / min for 3h, cool down to 60°C, add 4.53 g 1,4-butanediol was stabilized for 10 minutes, heated to 75°C for 2 hours, and finally placed in a vacuum oven at 100°C for 12 hours to prepare a mixed soft-segment polyurethane damping material.

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Abstract

The invention provides a mixed soft segment type polyurethane damping material and a preparation method thereof. The soft segment of the polyurethane damping material comprises olefin oligomer dihydric alcohol and polyether dihydric alcohol. The preparation method comprises the following steps of uniformly mixing olefin oligomer dihydric alcohol and polyether dihydric alcohol, and carrying out a prepolymerization reaction with diisocyanate to obtain a biisocyanate-terminated prepolymer, and adding a chain extender into the obtained biisocyanate-terminated prepolymer, and carrying out a chain extension reaction to obtain the polyurethane damping material. The polyurethane damping material disclosed by the invention has excellent properties of two soft segments, the damping temperature rangeis improved compared with that of a single soft segment, and the polyurethane damping material has better hydrolysis resistance; meanwhile, the preparation method is simple, high in repeatability andbeneficial to industrial production.

Description

technical field [0001] The invention relates to the field of preparation of polyurethane elastomer materials, in particular to a mixed soft segment type polyurethane damping material and a preparation method thereof. Background technique [0002] Polyurethane damping material is a kind of polymer damping material, which is a block copolymer composed of oligomer diol as soft segment and diisocyanate, small molecule diol or diamine as hard segment. It contains a large number of hydrogen bonds and a microphase separation structure formed due to the thermodynamic incompatibility of the soft and hard segments. The size of the soft segment phase and the hard segment phase and the phase interface between them have a great influence on the damping performance. Compared with other polymer materials, polyurethane itself has the advantages of good wear resistance and strong molecular controllability. The temperature range and damping factor of polyurethane damping materials can be impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/69C08G18/66C08G18/48C08G18/32
CPCC08G18/698C08G18/6674C08G18/48C08G18/3206
Inventor 刘力刘芸彤梁永日
Owner BEIJING UNIV OF CHEM TECH
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