Micro-foamed water-based damping coating and preparation method thereof

A damping coating and micro-foaming technology, applied in polyester coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of difficult stabilization of foaming gas, long curing time of coating, difficulty in cell size and density Control and other issues to achieve the effect of improving the curing speed

Active Publication Date: 2017-08-18
段辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional foaming damping coatings use chemical foaming or physical foaming during the preparation process, and it is difficult to control the size and density of cells.
Foaming by physical method, because the curing time of thermoplastic resin coating is longer, and the curing of thermosetting resin coating requires high temperature, the foaming gas is difficult to stabilize, so it is mostly limited to its application in plastics and composite materials

Method used

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  • Micro-foamed water-based damping coating and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A micro-foaming water-based damping coating, which uses water-based emulsion as the main agent, damping fillers as the main filler, organic fillers as auxiliary fillers, and an appropriate amount of crosslinking agent, catalyst, gas foaming agent and water;

[0029] Contains the following raw materials in parts by weight:

[0030] 10 parts of water-based emulsion, 80 parts of damping filler, 0.5 part of organic filler, 50 parts of crosslinking agent, 0.01 part of catalyst, 30 parts of water;

[0031] Gas blowing agent is CO 2 Gas, the temperature of the gas blowing agent is 220°C, and the pressure of the gas blowing agent is 10Mpa.

[0032] Preferably, the aqueous emulsion is a mixed solution of an aqueous acrylic resin emulsion and an alkyd resin emulsion, wherein both the aqueous acrylic resin and the alkyd resin have a glass transition temperature of 20°C to 30°C.

[0033] Preferably, the damping filler is flake mica and graphite.

[0034] Preferably, the organic ...

Embodiment 2

[0044] A micro-foaming water-based damping coating, which uses water-based emulsion as the main agent, damping fillers as the main filler, organic fillers as auxiliary fillers, and an appropriate amount of crosslinking agent, catalyst, gas foaming agent and water;

[0045] Contains the following raw materials in parts by weight:

[0046] 60 parts of water-based emulsion, 20 parts of damping filler, 10 parts of organic filler, 10 parts of crosslinking agent, 2 parts of catalyst, 5 parts of water;

[0047] Gas blowing agent is CO 2 Gas, the temperature of the gas blowing agent is 250°C, and the pressure of the gas blowing agent is 8Mpa.

[0048] Preferably, the aqueous emulsion is a mixture of epoxy resin emulsion and polyurethane resin emulsion, wherein both the epoxy resin and the polyurethane resin have a glass transition temperature of 40°C to 60°C.

[0049] Preferably, the damping filler is calcium carbonate.

[0050] Preferably, the organic filler is a defoamer, a levelin...

Embodiment 3

[0060] A micro-foaming water-based damping coating, which uses water-based emulsion as the main agent, damping fillers as the main filler, organic fillers as auxiliary fillers, and an appropriate amount of crosslinking agent, catalyst, gas foaming agent and water;

[0061] Contains the following raw materials in parts by weight:

[0062] 35 parts of aqueous emulsion, 50 parts of damping filler, 5 parts of organic filler, 30 parts of crosslinking agent, 1 part of catalyst, and 17 parts of water.

[0063] Gas blowing agent is CO 2 Gas, the temperature of the gas blowing agent is 235°C, and the pressure of the gas blowing agent is 9Mpa.

[0064] Preferably, the aqueous emulsion is a mixed solution of an alkyd resin emulsion and an epoxy resin emulsion, wherein the glass transition temperatures of the alkyd resin and the epoxy resin are both 70°C to 80°C.

[0065] Preferably, the damping filler is barium sulfate and titanium dioxide glass fiber.

[0066] Preferably, the organic...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to micro-foamed water-based damping coating and a preparation method thereof and aims to solve the problem that the size and the density of cells of the damping coating in the prior art are difficult to control. To solve the problem, the micro-foamed water-based damping coating is prepared from a water-based emulsion serving as a main agent, damping filler serving as main filler, organic filler serving as auxiliary filler as well as a proper amount of a crosslinking agent, a catalyst, a gas foaming agent and water; specifically, the micro-foamed water-based damping coating is prepared from raw materials by weight as follows: 10-60 parts of the water-based emulsion, 20-80 parts of the damping filler, 0.5-10 parts of the organic filler, 10-50 parts of the crosslinking agent, 0.01-2 parts of the catalyst and 5-30 parts of water, wherein the temperature of the gas foaming agent ranges from 220 DEG C to 250 DEG C, and the pressure of the gas foaming agent ranges from 8 Mpa to 10 Mpa. Besides, the invention further provides a method for preparing the micro-foamed water-based damping coating. The size and density of cells of the damping coating can be controlled effectively after the coating is foamed through the gas foaming agent.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and specifically provides a microfoaming water-based damping coating and a preparation method thereof. Background technique [0002] Damping coatings use the viscoelastic properties of polymer materials to absorb part of the vibration energy and then release it in the form of heat (that is, mechanical loss), so as to achieve the purpose of reducing the amplitude, reducing vibration and suppressing noise. Water-based damping paint is an environmentally friendly paint that uses water as the main dispersion solvent, uses inorganic and organic matter as fillers, and does not contain toxic organic solvents. Due to the advantages of good flame resistance, high adhesion, corrosion resistance, aging resistance, high damping performance and low cost at the same time, water-based damping coatings are currently being widely used in automobiles, trains, ships, aircraft, construction machinery and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D167/08C09D163/00C09D175/04C09D7/12C08J9/12
CPCC08J9/122C08J2203/06C08J2203/08C08J2333/00C08J2363/00C08J2367/08C08J2433/00C08J2463/00C08J2467/08C08J2475/04C08K2003/2241C08K2003/265C08K2003/3045C08L2203/14C08L2205/03C08L2312/00C09D7/61C09D7/63C09D7/65C09D7/70C09D133/00C09D163/00C09D167/08C08L67/08C08L61/32C08K13/04C08K7/00C08K3/34C08K3/04C08K5/315C08L33/00C08L75/04C08K13/02C08K3/26C08K5/42C08L63/00C08K7/14C08K3/22C08K3/30
Inventor 段辉
Owner 段辉
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