Ultraviolet light-moisture-heat triple curable automobile aqueous intermediate coat and preparation method thereof

A compound and composition technology, which is applied in the field of ultraviolet-moisture-heat triple curing automotive water-based intermediate coating composition and its preparation, can solve the problems that it is difficult to ensure the curing of automotive intermediate coatings, and achieve excellent impact resistance and save energy. Energy, effect of improving mechanical properties

Active Publication Date: 2013-11-13
华涂化工(吉林)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Automotive intermediate coatings, as the intermediate coating connecting the automotive primer and topcoat, require a certain degree of hardness, sand and stone impact resistance, and good sanding properties. With the demand for environmental protection and energy-saving automotive coatings, UV curing technology is gradually It has been applied to automotive coatings. However, due to the need to add a large amount of pigments and fillers to the intermediate coating, it is difficult to ensure that the prepared automotive intermediate coating can be well cured even with a dual-cure coating system.

Method used

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  • Ultraviolet light-moisture-heat triple curable automobile aqueous intermediate coat and preparation method thereof
  • Ultraviolet light-moisture-heat triple curable automobile aqueous intermediate coat and preparation method thereof
  • Ultraviolet light-moisture-heat triple curable automobile aqueous intermediate coat and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Mix 35g of epoxy resin E44 and 11.4g of acrylate, add 0.02g of tetrabutylammonium bromide, and react at 85°C to 90°C for 3 hours to obtain the first intermediate product;

[0035] Add 100ml of butanone and 3g of aminopolyethylene glycol siloxane to the first intermediate product at 35°C, and continue the reaction to obtain the second intermediate product;

[0036] Add 2g of hydrochloric acid to the second intermediate product at 25°C and 30°C, stir and neutralize, then remove butanone to obtain modified epoxy acrylate.

Embodiment 2

[0037] Example 2: Mix 30g of epoxy resin E51 and 11.2g of acrylate, add 0.02g of tetrabutylammonium bromide, and react at 85°C to 90°C for 3 hours to obtain the first intermediate product;

[0038] Add 100ml of butanone and 5g of aminopolyethylene glycol siloxane to the first intermediate product at 35°C to 40°C, and continue the reaction to obtain the second intermediate product;

[0039] Add 2.2 g of sulfuric acid to the second intermediate product at 25° C. to 30° C., stir and neutralize, then remove methyl ethyl ketone to obtain modified epoxy acrylate.

Embodiment 3

[0040] Example 3: Mix 42g of epoxy resin E12 and 4.4g of methacrylate, add 0.03g of tetrabutylammonium bromide, and react at 85°C for 3h to obtain the first intermediate product;

[0041] At 40°C, add 150ml methyl ethyl ketone and 2.6g aminopolyethylene glycol siloxane to the first intermediate product, and continue the reaction to obtain the second intermediate product;

[0042] Add 1.8 g of acetic acid to the second intermediate product at 30° C., stir and neutralize, then remove methyl ethyl ketone to obtain modified epoxy acrylate.

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Abstract

The invention provides a compound with a structure represented by a formula (I). R1 is acrylic group or methacrylic group. R2 is protonic acid group. w, m, and n are degrees of polymerization, where w=1-50, m=1-50, and n=1-50. The invention also provides an ultraviolet light-moisture-heat triple curable automobile aqueous intermediate coat comprising, by weight, 50-70 parts of modified aqueous epoxy acrylate with a structure represented by the formula (I), 6-15 parts of an aqueous curing agent, 10-18 parts of water, 6-10 parts of an aqueous film-forming cosolvent, 1-2.2 parts of an aqueous dispersing agent, 0.4-0.6 parts of an aqueous defoaming agent, 0.5-0.8 parts of an aqueous leveling agent, 8-20 parts of talcum powder, 3-6 parts of titanium dioxide, and 4-5 parts of a photoinitiator. The automobile aqueous intermediate coat is environment-friendly and energy-saving, and has excellent impact resistance and good grinding performance.

Description

technical field [0001] The invention relates to the field of automotive coatings, in particular to an ultraviolet-moisture-heat triple curing automotive water-based intermediate coating composition and a preparation method thereof. Background technique [0002] In recent years, environmental protection and energy-saving UV-curable coatings have attracted widespread attention. However, the technical bottleneck of a single UV-curable coating is the incomplete curing of shadows in small areas and the difficulty of using fillers and deep curing. Therefore, UV-heat or UV-moisture dual-curing coating systems have gradually attracted widespread attention. Because this type of coating overcomes the shortcomings of single UV curing, the paint film has better mechanical properties after dual curing and crosslinking. The double-layer network structure formed by the dual-curing process further improves the hardness and wear resistance of the paint film, and at the same time overcomes th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C08G59/17C08G81/00C07F7/18C09D175/14C09D7/12
Inventor 张振久马海松高成勇
Owner 华涂化工(吉林)有限公司
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