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Polyurethane/epoxy sliding ring damping coating and preparation method thereof

A damping coating and polyurethane technology, applied in the field of damping materials, can solve the problems of high permanent deformation rate of coatings, stress concentration, poor mechanical properties of coatings, etc., and achieve the effect of reducing fracture and reducing permanent deformation rate.

Active Publication Date: 2022-02-01
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing polyurethane / epoxy damping coating has a homogeneous network structure. When the coating is subjected to an external force, the polyurethane network will move relative to each other, which will easily cause stress concentration, and the molecular chain will be easily broken, resulting in poor mechanical properties of the coating and permanent coating. High deformation rate

Method used

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  • Polyurethane/epoxy sliding ring damping coating and preparation method thereof
  • Polyurethane/epoxy sliding ring damping coating and preparation method thereof

Examples

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experiment example

[0045] Experimental example: Damping coating obtained by the above-described Examples 1-10 and Comparative Examples 1-6, using DMA equipment to measure the damping value of the coating at each temperature, as shown in Table 3.

[0046] Table 3 is the damping performance of Examples 1-10 and the contrast 1-6 coating

[0047]

[0048]

[0049] In the above Table 3, the units of each data are ° C, wherein the Tα represents the temperature corresponding to the maximum damping value, and TANΔmax (attα) represents the maximum damping value of the coating.

[0050] From the above Table 3, the coating of Examples 1-10 can be obtained, with excellent damping properties and mechanical properties, and the temperature range of the coating tan δ> 0.3 of Example 1-4 is 99.1 ° C, 107.8 ° C, 127.4 ° C, respectively. 119.9 ° C. The permanent deformation rate of the coating can be as low as 28%. In Comparative Example 1-6, the temperature range of the coating tan δ> 0.3 is 48.3 ° C, 57.1 ° C, 4...

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Abstract

The invention relates to the technical field of damping materials, in particular to a polyurethane / epoxy sliding ring damping coating and a preparation method thereof. The coating is prepared from the following components: 6-10 parts of polyurethane, 1-5 parts of epoxy resin, 2-10 parts of polyrotaxane and 0.02-0.05 part of a curing agent. According to the invention, polyrotaxane is added into polyurethane epoxy resin, and a cross-linking point of polyrotaxane and a main chain of a network molecule can slide, so that all molecular chains of a network structure can be subjected to external force, the stress concentration of the molecular chains is reduced, and the permanent deformation rate of the coating is reduced. Moreover, the amount of the used epoxy resin is less than that of the polyurethane, so that the epoxy content in the coating system is low, an epoxy network is not easy to form, or the formed epoxy network is few, the movement of the polyurethane network is not hindered, and the coating system is high in motility, high in friction energy consumption, high in material damping peak value and wide in high-damping temperature range.

Description

Technical field [0001] The present invention relates to the field of damping materials, and in particular, a polyurethane / epoxy sliding ring damping coating and a preparation method thereof. Background technique [0002] The damping coating is configured by adding an appropriate amount of filler in a polymer resin, and is a special coating that can be coated with a metal material having a shock absorption and noise reduction. Polyurethane damping coatings are more coatings of studies, while epoxy resins have excellent physical chemical properties, and their solids have good mechanical properties, good chemical stability, low curing shrinkage rate, etc., in many fields . [0003] The existing polyurethane / epoxy damping coating is a homogeneous network structure. When the coating is external for external force, the polyurethane network produces relatively movement, which is easy to cause the stress concentration, the molecular chain is easy to break, resulting in poor mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D105/16C09D163/02C08B37/16
CPCC09D175/08C09D105/16C08B37/0015C08L2205/04C08L5/16C08L63/00C08L75/08
Inventor 李姜冯强张捷郭少云沈梦露秦超
Owner SICHUAN UNIV
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