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A kind of preparation method suitable for 140 ℃ baking water-based damping coating

A damping paint, water-based technology, applied in the direction of coating, etc., can solve problems such as appearance defects, inability to see through the coating film, and bulges

Active Publication Date: 2021-11-19
东莞市迅杰通新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the water-based damping coatings in China are used in rail transit vehicles, ships and other fields. The curing time at room temperature usually takes more than 24 hours. The curing speed of this coating cannot meet the continuous production cycle of automotive applications. High temperature baking can accelerate Curing time, but when the water-based coating is thicker and baked at a temperature above 100°C, the surface will dry and form a film first, and the internal water vapor will not penetrate the coating film, resulting in bulging or cracking, thus forming appearance defects

Method used

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  • A kind of preparation method suitable for 140 ℃ baking water-based damping coating
  • A kind of preparation method suitable for 140 ℃ baking water-based damping coating
  • A kind of preparation method suitable for 140 ℃ baking water-based damping coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0050] 1) Prepare the following components in parts by weight: acrylic resin emulsion: 20, the content of pure acrylic emulsion in the acrylic resin emulsion is 30%, glass transition temperature Tg=0°C; deionized water: 5; defoamer: 0.3; dispersant 0.6; calcium carbonate powder: φ15μm~50μm, 70; thickener: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;

[0051] 2) Put acrylic resin emulsion, deionized water, defoamer, foaming agent, dispersant and polyether polyol in a stirring container, turn on the mixer, adjust the speed to 500rpm and stir for 5 minutes;

[0052] 3) Add calcium carbonate powder and denatured modified starch filler into the mixing container, turn on the mixer, adjust the speed to 1000rpm and stir for 10 minutes;

[0053] 4) Add the color paste into the mixing container, turn on the mixer, adjust the speed to 1000rpm and stir for 10 minutes;

[0054] 5) Add the thickener to the mixing container, turn on the...

Embodiment 4

[0057] 1) Prepare the following components in parts by weight: acrylic resin emulsion: 25, the content of pure acrylic emulsion in the acrylic resin emulsion is 30%, glass transition temperature Tg=-10°C; deionized water: 3; defoamer : 0.4; Dispersant 1: 0.4; Mica powder: φ15μm~50μm, 65; Thickener: 0.02; Microsphere foaming agent: 0.1; Color paste: 0.5; Polyether polyol: 2; Modified starch: 1;

[0058] 2) Put acrylic resin emulsion, deionized water, defoamer, foaming agent, dispersant and polyether polyol in a stirring container, turn on the mixer, adjust the speed to 400rpm and stir for 7 minutes;

[0059] 3) Add mica powder and denatured modified starch filler into the mixing container, turn on the mixer, adjust the speed to 800rpm and stir for 12 minutes;

[0060] 4) Add the color paste into the mixing container, turn on the mixer, adjust the speed to 800rpm and stir for 12 minutes;

[0061] 5) Add the thickener to the mixing container, turn on the mixer, adjust the speed ...

Embodiment 5

[0064] 1) Prepare the following components in parts by weight:

[0065] Acrylic resin emulsion: 30, preferably the content of pure acrylic emulsion in the acrylic resin emulsion is 30%, glass transition temperature Tg=20°C; deionized water: 6; defoamer: 0.1; dispersant 0.9; calcium carbonate powder: φ15μm~50μm, 60; thickener: 0.01; microsphere foaming agent: 0.5; color paste: 0.5; polyether polyol: 1; modified starch: 2;

[0066] 2) Put acrylic resin emulsion, deionized water, defoamer, foaming agent, dispersant and polyether polyol in a stirring container, turn on the mixer, adjust the speed to 600rpm and stir for 4 minutes;

[0067] 3) Add calcium carbonate powder and denatured modified starch filler into the mixing container, turn on the mixer, adjust the speed to 1200rpm and stir for 8 minutes;

[0068] 4) Add the color paste into the mixing container, turn on the mixer, adjust the speed to 1200rpm and stir for 8 minutes;

[0069] 5) Add the thickener to the mixing conta...

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Abstract

The invention relates to a method for preparing a water-based damping coating suitable for baking at 140°C, which is characterized in that it comprises the following steps: preparing the following components by weight and number: acrylic resin emulsion: 20-30; deionized water: 3-6 ;Defoamer: 0.1‑0.4; Dispersant: 0.4‑0.9; Calcium carbonate powder or mica powder: particle size range is 15μm~50μm, 50‑80; Thickener: 0.01‑0.02; Microsphere foaming agent: 0.1‑ 0.5; color paste: 0.5; polyether polyol: 1‑2; modified starch: 1‑2; put acrylic resin emulsion, deionized water, defoamer, foaming agent, dispersant and polyether polyol in In the mixing container, turn on the mixer to stir; add calcium carbonate powder or mica powder with a particle size range of 15 μm to 50 μm and denatured modified starch filler into the mixing vessel, start the mixer to stir; add the color paste to the mixing vessel, turn on the mixer to stir, the increased The thickener is added to the stirring container, and the mixer is started to stir; the defoamer is added to the stirring container, and the mixer is started to stir to obtain the damping coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of a water-based damping coating suitable for baking at 140°C. Background technique [0002] Most of the water-based damping coatings in China are used in rail transit vehicles, ships and other fields. The curing time at room temperature usually takes more than 24 hours. The curing speed of this coating cannot meet the continuous production cycle of automotive applications. High temperature baking can accelerate Curing time, but when the water-based coating is thicker and baked at a temperature above 100°C, the surface will dry and form a film first, and the internal water vapor will not penetrate the coating film, resulting in bulging or cracking, thereby forming appearance defects. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method suitable for baking water-based damping coatings at 140°C. The prepared coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D125/14C09D133/08C09D7/61C09D7/65
CPCC08L2205/03C08L2205/035C09D125/14C09D133/08C09D7/61C09D7/65C08L33/08C08L71/00C08L3/04C08K3/34C08K3/26C08L25/14
Inventor 张秦铵
Owner 东莞市迅杰通新材料有限公司