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Water-based acrylic sealant for automobiles and preparation method thereof

A water-based acrylic and sealant technology, used in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of heavy odor, can not fully meet environmental protection requirements, large VOC emissions, etc., and achieve low VOC emissions Quantity, pollution-free durability, good embedding effect

Inactive Publication Date: 2015-02-04
三友(天津)高分子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based sealants widely used now have heavy odor and large VOC emissions, which cannot fully meet environmental protection requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Take 44% of water-based acrylic emulsion, 20% of talcum powder, 20% of heavy calcium carbonate, 8% of organic bentonite, 5% of hydroxyethyl cellulose, 1.5% of YB-401 multifunctional dispersing and anti-sedimentation agent, and S4800 disinfectant Foaming agent 1%, Kathon? LXE fungicide 0.5%.

[0018] Disperse the water-based acrylic emulsion, talcum powder, heavy calcium carbonate, organic bentonite and YB-401 multifunctional dispersing anti-sedimentation agent on a high-speed disperser at a speed of 1200 rpm for 20 minutes. After adding hydroxyethyl cellulose, disperse for 1 hour at a speed of 1000 rpm on a high-speed disperser, and finally add S4800 defoamer and Kathon? LXE fungicide, and disperse at a speed of 1000 rpm on a high-speed disperser After 20 minutes, a water-based acrylic sealant for automobiles was obtained.

Embodiment 2

[0019] Example 2: Take 35% of water-based acrylic emulsion, 20% of talcum powder, 23% of heavy calcium carbonate, 5% of fumed silica, 2% of titanium dioxide, 10% of hydroxyethyl cellulose, and YB-401 multifunctional dispersion Precipitating agent 2%, S4800 defoamer 1%, Kathon? LXE fungicide 2%.

[0020] Disperse the water-based acrylic emulsion, talcum powder, heavy calcium carbonate, fumed silica, titanium dioxide and YB-401 multifunctional dispersing anti-sedimentation agent on a high-speed disperser at 1200 rpm for 30 minutes. After adding hydroxyethyl cellulose, disperse for 1 hour at a speed of 1000 rpm on a high-speed disperser, and finally add S4800 defoamer and Kathon? LXE fungicide, and disperse at a speed of 1000 rpm on a high-speed disperser After 20 minutes, a water-based acrylic sealant for automobiles was obtained.

Embodiment 3

[0021] Example 3: Take 45% of water-based acrylic emulsion, 30% of talcum powder, 15% of glass fiber powder, 5% of hydroxyethyl cellulose, 1.5% of YB-401 multifunctional dispersing anti-sedimentation agent, and 1.5% of YB-405 high-efficiency thixotropic agent 2 %, S4800 defoamer 1%, HTK-30 fungicide 0.5%.

[0022] Disperse the water-based acrylic emulsion, talcum powder, glass fiber powder and YB-401 multifunctional dispersing anti-sedimentation agent on a high-speed disperser at 1200 rpm for 30 minutes. After adding hydroxyethyl cellulose, disperse on a high-speed disperser at a speed of 1000 rpm for 1 hour, and finally add YB-405 high-efficiency thixotropic agent, S4800 defoamer and HTK-30 fungicide, and disperse on a high-speed disperser with The number of rotations of 1000 revolutions per minute was dispersed for 20 minutes to obtain a water-based acrylic sealant for automobiles.

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PUM

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Abstract

The invention discloses a water-based acrylic sealant for automobiles and a preparation method thereof. The sealant comprises a water-based acrylic acid emulsion, a filler, a dispersing agent, a thickener, a high-efficiency thixotropic agent, a bactericide and a defoamer. The method comprises the following steps: dispersing the water-based acrylic acid emulsion, filler and dispersing agent in a high-speed dispersion machine at the rate of 1200 rpm for 20-30 minutes; adding the thickener, and dispersing at the rate of 1000 rpm for 1-1.5 hours; and finally, adding the high-efficiency thixotropic agent, bactericide and defoamer, and dispersing at the rate of 1000 rpm for 20 minutes to obtain the uniformly dispersed water-based acrylic sealant for automobiles. The sealant has the advantages of favorable stopping property, favorable squeezing constructability, favorable weather resistance, favorable wear resistance, favorable storage stability and the like, has excellent sealability after being cured, can keep permanent sealing of the automobile body, has ultralow VOC (volatile organic compound) discharge amount especially in the coating curing process, and thus, is green and environment-friendly.

Description

technical field [0001] The invention relates to a sealant for automobiles, in particular to a water-based acrylic sealant for automobiles and a preparation method thereof, which can be applied to bonding and sealing in the automobile manufacturing industry. Background technique [0002] Sealant is a fluid or extrudable unshaped material, which can be embedded and sealed, and can be stably bonded to the substrate by drying, temperature change, solvent volatilization, chemical crosslinking, and gradually shaped into a plastic solid. Viscoelastic or elastic sealing materials. When the sealant is used in automobile manufacturing, it can keep the entire car body sealed and isolate moisture, dust and smoke from the outside. [0003] With the development of automobile manufacturing technology, the performance of automobile sealant is also continuously improved. Not only must the bonding performance be good, the coating hardness is high, the wear resistance is strong, but also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00C09J11/06C09J11/04C09J11/08
Inventor 吴金丽李珍李士学王永明李建武高之香吴子刚
Owner 三友(天津)高分子技术有限公司
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