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A kind of general epoxy primer and preparation method thereof

A primer and epoxy technology, applied in the field of coatings, can solve the problems of loss of protective function of the paint layer, low adhesion, scratches or scratches on the substrate, etc., to reduce curing shrinkage, improve anti-corrosion ability, improve The effect of adhesion

Active Publication Date: 2019-04-23
无锡市玉邦树脂涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, the adhesion ability of common epoxy primers sold on the market is generally relatively low. Once the surface of the paint layer is subjected to a large mechanical impact, the paint layer is likely to be removed from the substrate. If it is peeled off, the base material will be exposed to the air and be corroded by external substances. What's more, the base material will be directly scratched or scratched, and then the protective function of the paint layer on the base material will be lost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Prepare component A:

[0065] S1, 3kgC9 petroleum resin, 3kg epoxy-modified phenolic resin and 3kg xylene are mixed and dissolved to make a pre-dissolved solution for subsequent use;

[0066] S2. Put 5kg of high-molecular epoxy resin, 5kg of low-molecular epoxy resin and 3.2kg of xylene into the dispersion tank in sequence, and disperse at a high speed for 5-18 minutes to make it evenly dispersed;

[0067] S3. Add 0.5kg of bentonite under high-speed dispersion, and disperse for 15-45 minutes to make it evenly dispersed;

[0068] S4. Add 0.2kg methyl phosphate and 0.3kg sulfonate under high-speed dispersion, and disperse for 5-25 minutes to fully activate the bentonite;

[0069] S5. Add 3kg of titanium dioxide, 6kg of mica iron oxide, 7kg of mica powder, 7kg of zinc phosphate, 6kg of feldspar powder and 4kg of talcum powder into the dispersing tank in sequence, and disperse at a high speed until the fineness is ≤40 μm, and keep it at a temperature of 55-60 25~45min;

...

Embodiment 2

[0074] Prepare component A:

[0075] S1, make pre-dissolved solution after mixing and dissolving 8kgC9 petroleum resin, 8kg epoxy-modified phenolic resin and 7kg xylene;

[0076] S2. Put 15kg of high-molecular epoxy resin, 10kg of low-molecular epoxy resin and 7.8kg of xylene into the dispersion tank in turn, and disperse at a high speed for 5-18 minutes to make it evenly dispersed;

[0077] S3. Add 2kg of bentonite under high-speed dispersion, and disperse for 15-45 minutes to make it evenly dispersed;

[0078] S4. Add 1.2kg polyoxyethylene alkylphenol ether and 0.8kg polyoxyethylene polyoxypropylene block copolymer under high-speed dispersion, and disperse for 5-25 minutes to fully activate the bentonite;

[0079] S5. Add 10kg of titanium dioxide, 12kg of mica iron oxide, 14kg of mica powder, 10kg of zinc phosphate, 11kg of feldspar powder and 13kg of talcum powder into the dispersing tank in sequence, and disperse at high speed until the fineness is ≤40 μm, and keep it at ...

Embodiment 3

[0084] Prepare component A:

[0085] S1, 5.5kgC9 petroleum resin, 5.5kg epoxy-modified phenolic resin and 4.8kg xylene are mixed and dissolved to make a pre-dissolved solution for subsequent use;

[0086] S2. Put 10kg of high-molecular epoxy resin, 7.5kg of low-molecular epoxy resin and 5.3kg of xylene into the dispersion tank in turn, and disperse at a high speed for 5-18 minutes to make the dispersion even;

[0087] S3. Add 1.3kg of bentonite under high-speed dispersion, and disperse for 15-45 minutes to make it evenly dispersed;

[0088] S4. Add 0.8kg dimethyl phosphate and 0.5kg polyoxyethylene fatty alcohol ether under high-speed dispersion, and disperse for 5-25 minutes to fully activate the bentonite;

[0089] S5. Add 6kg titanium dioxide and 9kg mica iron oxide, 10.5kg mica powder, 8.5kg zinc phosphate, 8.5kg feldspar powder and 8.5kg talcum powder to the dispersion cylinder in turn, disperse at high speed to fineness≤40μm, and Keep for 25-45min under 60°C;

[0090]...

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Abstract

The invention provides an epoxy universal primer which comprises a component A and a component B, wherein the component A comprises the following ingredients in parts by weight: 5-10 parts of low molecule epoxy resin, 5-15 parts of high molecular epoxy resin, 3-8 parts of C9 petroleum resin, 3-8 parts of epoxy modified phenolic resin, 0.5-2 parts of bentonite, 0.5-2 parts of a wetting dispersant, 3-10 parts of titanium dioxide, 30-60 parts of anticorrosion pigment and 10-20 parts of xylene; and the component B comprises the following ingredients in parts by weight: 40-70 parts of chain extension modified polyamide, 2-10 parts of a curing accelerator and 30-60 parts of xylene. The epoxy universal primer has relatively strong anticorrosion capability, and the adhesive force between the epoxy universal primer and a metallic substrate is stronger than that between a general primer and the metallic substrate, so that the effective protection of the epoxy universal primer to the metallic substrate is greatly improved, and thus the epoxy universal primer is suitable for being used on the surfaces of most of metallic substrates.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an epoxy universal primer and a preparation method thereof. Background technique [0002] Epoxy Universal Primer is a multipurpose epoxy primer that can be used on stainless steel, galvanized sheet, aluminum or smooth steel surfaces in addition to conventionally prepared steel surfaces, suitable for immersion It has excellent versatility and corrosion resistance in water environment and air exposure environment. [0003] However, in the prior art, the adhesion ability of common epoxy primers sold on the market is generally relatively low. Once the surface of the paint layer is subjected to a large mechanical impact, the paint layer is likely to be removed from the substrate. If it is peeled off, the base material will be exposed to the air and be corroded by external substances. What's more, the base material will be directly scratched or scratched, and then the protective function of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D161/14C09D7/61C09D7/63C09D7/65C09D5/08
CPCC08K2201/014C08L2205/035C09D5/084C09D7/61C09D7/63C09D7/65C09D161/14C09D163/00C08L63/00C08L57/02C08L61/14C08K13/02C08K3/346C08K3/34C08K2003/2272C08K2003/328C08K2003/2241
Inventor 刘源徐建东强飞
Owner 无锡市玉邦树脂涂料有限公司