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Water borne epoxy intermediate paint

A technology of water-based epoxy and water-based epoxy resin, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problems of affecting the mechanical properties and anti-corrosion properties of coatings, long curing time, uneven film-forming surface, etc., to improve mechanical properties and salt spray resistance, convenient and quick construction, and the effect of meeting environmental protection requirements

Active Publication Date: 2011-06-15
武汉海源九天新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based curing agent belongs to the polyamide curing agent. The polyamide curing agent has the problem of poor compatibility with epoxy resin. After the two are mixed, they cannot be uniformly dispersed, resulting in uneven film-forming surface, which affects the mechanical properties and anti-corrosion properties of the coating.
And the curing time is too long, which cannot meet the requirements of continuous production of containers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The weight percentage of each component in component A is: water-based epoxy curing agent 30%, polycarboxylate ammonium salt 0.2%, polycarboxylate sodium salt 0.18%, aluminum tripolyphosphate 1%, zinc oxide 2%, micaceous iron oxide Red 5%, iron oxide red 5%, mica powder 1%, talc powder 3%, calcium carbonate 1%, lauryl ester 1%, polysiloxane 0.1%, polyether modified polydimethylsiloxane 0.1%, isothiazolinone 0.01%, organic zinc chelate 0.5%, associative polyurethane 0.01%, demineralized water 49.9%.

[0066] The weight percent of each composition in the B component is: self-emulsifying water-based epoxy resin 10%, demineralized water 90%, stir to obtain B component, wherein

[0067] The self-emulsifying water-based epoxy resin is prepared by the following method: 1.0g p-aminobenzoic acid is added in the reactor, 30ml acetone is added under stirring, then 1.4g epoxy resin CYD-128 is added to react, and at 35 After reacting at ℃ for 4 hours, acetone and excess p-aminobenz...

Embodiment 2

[0071] The weight percent of each component in component A is: water-based epoxy curing agent 43.61%, polycarboxylate ammonium salt 0.5%, polycarboxylate sodium salt 0.5%, aluminum tripolyphosphate 0.5%, zinc oxide 0.5%, micaceous iron oxide Red 5%, iron oxide yellow 5%, mica powder 1%, barium sulfate 2%, kaolin 2%, lauryl ester 2%, polysiloxane 0.1%, polyether modified polydimethylsiloxane 0.1 %, isothiazolinone 0.5%, organic zinc chelate 0.5%, associative polyurethane 0.1%, demineralized water 36.09%.

[0072] The weight percent of each composition in the B component is: self-emulsifying water-based epoxy resin 20%, demineralized water 80%, stir to obtain B component, wherein

[0073] The self-emulsifying waterborne epoxy resin is prepared by the following method: 1.0g p-aminobenzoic acid is added in the reactor, 30ml acetone is added under stirring, then 1.4g epoxy resin CYD-128 is added to react, and the reaction is carried out at 60 After reacting at ℃ for 1.5h, acetone ...

Embodiment 3

[0077] The weight percent of each component in component A is: water-based epoxy curing agent 23%, polycarboxylate ammonium salt 1%, zinc phosphate 1%, zinc borate 1%, aluminum tripolyphosphate 2.5%, zinc oxide 0.5%, oxide Iron red 3%, titanium dioxide 2%, iron oxide yellow 5%, mica powder 1%, barium sulfate 1%, talc powder 1%, kaolin 1%, calcium carbonate 1%, lauryl ester 2%, polysiloxane Alkane 1%, polyether modified polydimethylsiloxane 0.5%, isothiazolinone 0.5%, organic zinc chelate 2%, associative polyurethane 0.1%, demineralized water 49.9%.

[0078] The weight percent of each composition in the B component is: self-emulsifying water-based epoxy resin 10%, demineralized water 90%, stir to obtain B component, wherein

[0079] The water-based epoxy resin was prepared by the following method: 2.0g TDI was added to the reactor, 30ml of dehydrated acetone was added under stirring, and 1.6g of p-hydroxybenzoic acid was added to react, and after reacting at 80°C for 2.5h, The...

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Abstract

The invention discloses water borne epoxy intermediate paint. The intermediate paint comprises a component A and a component B, and the weight ratio of the component A to the component B is between 0.5 and 10, wherein the component A comprises the following ingredients in percentage by weight: 23-55 percent of water borne epoxy resin curing agent, 0.1-1 percent of wetting dispersant, 1-5 percent of antirust pigment, 5-10 percent of tinting pigment, 1-5 percent of filler, 1-2 percent of film forming auxiliary, 0.1-1 percent of defoaming agent, 0.1-0.5 percent of flatting agent, 0.01-0.5 percent of antiseptic, 0.5-2 percent of rust inhibitor, 0.01-0.1 percent of rheology modifier and 36.09-49.9 percent of softened water; and the component B comprises the following ingredients in percentage by weight: 10-30 percent of self-emulsified water borne epoxy resin and 70-90 percent of softened water. By compounding a self-emulsified epoxy resin emulsion and a self-emulsified water borne epoxy resin curing agent, the mechanical performance and the salt mist resistance of the paint can be improved, and the environmentally friendly requirement can be fulfilled.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings for containers, in particular to a water-based epoxy intermediate paint. Background technique [0002] The water-based intermediate paint for containers requires good anti-corrosion properties, good adhesion with the top coat and primer, and quick-drying properties. The existing container coating matching schemes are basically similar, and epoxy zinc phosphate is generally used as the container intermediate paint. This intermediate paint will release a large amount of volatile organic compounds during the production process and pollute the environment. With the increasingly stringent environmental protection regulations, the International Container Standardization Committee has put forward higher requirements for the environmental protection and hygiene of container coatings, and the environmental protection of container coatings has become inevitable. [0003] A water-based epoxy in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12
Inventor 刘胜波牛永华张良均李娜
Owner 武汉海源九天新材料有限公司
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