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Spray type damping material

A damping material and metal silicon powder technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as limiting damping performance, and achieve the effects of increasing internal friction, improving damping performance, and improving energy consumption

Active Publication Date: 2020-08-28
QINGDAO SHAMU INT TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the silanized silicon powder described in the invention, the silane coupling agent wraps the silicon powder as physical adsorption; It is difficult to cause shearing effect on the surrounding polymer structure to dissipate energy, which limits the improvement of its damping performance.
In addition, since concrete is a rigid material, there is no obvious deformation under vibration conditions, and no shear deformation occurs; energy can only be dissipated through the relative displacement between silica particles and silane coupling agents, which further Limits the improvement of its damping performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The surface of the metal silicon powder is silanized, and the specific steps are:

[0019] (1) carry out plasma surface activation to metal silicon powder under nitrogen environment, weigh the appropriate amount of surface activated metal silicon powder, under stirring condition, slowly join in the silane coupling agent methanol solution that mass fraction is 0.5%; Said The particle size of the metal silicon powder is 350 mesh; the silane coupling agent is γ-aminopropyltriethoxysilane.

[0020] (2) Stirring and reacting at room temperature for 6 hours to complete the silanization reaction on the surface of the metal silicon powder; the surface silanization modification of the metal silicon powder introduces a large amount of terminal amino groups on the surface of the silicon powder.

[0021] (3) After filtering, washing and vacuum drying, the surface-modified metal silicon powder is obtained.

[0022] Weigh 30 parts by weight of 4-methyl-1,3-diaminocyclohexane, 45 par...

Embodiment 2

[0026] Different from Example 1, the surface of the metal silicon powder is silanized, and the specific steps are:

[0027] (1) The massfraction of silane coupling agent in the methanol solution of described silane coupling agent is 1.5%; The particle diameter of described metal silicon powder is 500 orders; Described silane coupling agent is 3-aminopropyltrimethoxy silane.

[0028] (2) Stirring and reacting at room temperature for 2 hours to complete the silanization reaction on the surface of the metal silicon powder.

[0029] (3) After filtering, washing and vacuum drying, the surface-modified metal silicon powder is obtained.

[0030] Weigh 40 parts by weight of 3,5-diethyl-2,4-toluenediamine, 60 parts by weight of amino-terminated polyether D230, 70 parts by weight of polycarbonate polyol, and 1 part by weight of metal silicon powder whose surface has been silanized , 3 parts by weight of a dispersant, 2 parts by weight of a flame retardant to form the R component; the ...

Embodiment 3

[0034] Different from Example 1, the surface of the metal silicon powder is silanized, and the specific steps are:

[0035] (1) The mass fraction of the silane coupling agent in the methanol solution of the silane coupling agent is 2.5%; the particle diameter of the metal silicon powder is 700 orders; the silane coupling agent is γ-aminopropyl triethoxy base silane.

[0036] (2) stirring and reacting at room temperature for 8 hours, so that the surface of the metal silicon powder is silanized;

[0037] (3) After filtering, washing and vacuum drying, the surface-modified metal silicon powder is obtained.

[0038]Weigh 50 parts by weight of 3,3'-dichloro-4,4'-diaminodiphenylmethane, 75 parts by weight of amino-terminated polyether D400, 5 parts by weight of polycarbonate polyol, and 5 parts by weight of polyacrylate polyol , 5 parts by weight of metal silicon powder after silanization treatment on the surface, 6 parts by weight of auxiliary coupling agent, and 4 parts by weigh...

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PUM

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Abstract

The invention relates to a spraying type damping material. A composite damping material is prepared by the reaction of a component A and a component R according to a weight ratio of 1:1, wherein the component A is a semi-prepolymer which is synthesized by 40 to 70 parts of polyisocyanate by weight and 50 to 70 parts of hydroxyl terminated polyether by weight; the component R is prepared from the following components in parts by weight: 20 to 60 parts of diamine chain extender, 10 to 75 parts of amine terminated polyether, 10 to 70 parts of hydroxyl terminated polyether, 1 to 30 parts of metalsilicon powder, and 1 to 30 parts of additive; the diamine chain extender consists of primary amine, and the surface of the metal silicon powder is treated by silanization. The prepared spraying typedamping material has the advantages that the diamine chain extender mainly consists of a molecule structure containing primary amine, so that the reaction activity is higher, the gelation time is shorter, the diamine chain extender is favorable for the spraying type damping material to quickly gelate, and the overflow in the construction process is avoided; the property is obviously improved, andthe important meaning is realized in the actual production.

Description

technical field [0001] The invention belongs to the field of construction, and relates to a spray damping composite material and a preparation method thereof, in particular to a composite damping material made by adding surface-modified metal silicon powder to existing spray damping materials and a preparation method thereof . Background technique [0002] Composite damping materials are made by adding inorganic fillers on the basis of existing damping materials. The addition of inorganic fillers can limit the movement of molecules through friction with polymers, increase the phase lag between stress and strain, and make damping materials The Tg of Tg moves to the high temperature direction, expanding the damping temperature range; in addition, it can also weaken the cross-linking effect between molecules, reduce the cross-linking density, and increase the tanδ of the damping factor. Fan Yongzhong et al. prepared fiber-reinforced epoxy resin composites, and studied the effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C08G18/66C08G18/10C08G18/40C08G18/50C08G18/44C08G18/32C08K9/06C08K3/34
CPCC08G18/10C08G18/4018C08G18/4063C08G18/44C08G18/5021C08G18/6618C08G2150/50C08K3/34C08K9/06C08K2201/005C09D175/04C08G18/3234C08G18/324C08G18/3243C08G18/3814
Inventor 许圣鸣丁国雷梁龙强鞠家辉
Owner QINGDAO SHAMU INT TRADE