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Epoxy-resin coating composite

A technology of epoxy resin coating and epoxy resin, which is applied in the direction of epoxy resin coating, anti-corrosion coating, coating, etc., can solve the problem of loss of softness of the coating film, achieve beautiful appearance, excellent adhesion between exposed layers, and softness excellent effect

Inactive Publication Date: 2014-11-26
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modified epoxy resin has good solubility in weak solvents such as mineral spirits, but since the epoxy resin is modified with an acrylic resin or a polymerizable unsaturated monomer, the coating film becomes brittle over time, Tendency to lose flexibility of the formed coating film

Method used

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Examples

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Embodiment

[0084] Hereinafter, the present invention will be more specifically described based on examples, but the present invention is not limited to these examples. In addition, "parts" and "%" in the following examples mean "parts by mass" and "% by mass", respectively.

[0085] Preparation of Rosin Modified Epoxy Resin Solution

manufacture example 1

[0087] In the reaction device that has heating device, stirrer and nitrogen introduction tube, add " jER828 " (trade name, Japanese Epoch Resin company make, epoxy equivalent is the bisphenol A type epoxy resin of 185) 185 parts, gum rosin 51 parts 98 parts of soybean oil fatty acids were heated and reacted at 160°C while stirring under a dry nitrogen atmosphere until the acid value became 0. Then add 160 parts of "Suwazo-1000" (trade name, manufactured by Cosmo Petroleum Co., Ltd., boiling point: 162-176° C.), and after cooling, 38 parts of diphenylmethane-4,4'-diisocyanate are charged in 100 It reacted at ℃ until the isocyanate group disappeared, and obtained the rosin-modified epoxy resin solution (I-1) whose epoxy equivalent was 745 and the heating residual component was 70%.

manufacture example 2

[0089] In a reaction device with a heating device, a stirrer, and a nitrogen introduction pipe, 250 parts of "jER834" (trade name, manufactured by Japan Epoch Resin Co., Ltd., a bisphenol A type epoxy resin with an epoxy equivalent of 250) and 17 parts of tall rosin were added. part and 56 parts of dehydrated castor oil fatty acid were heated to 160°C while stirring under a dry nitrogen atmosphere, and reacted until the acid value became 0. Next, add 145 parts of "Swazel 1000" (trade name, manufactured by Cosmo Petroleum Co., Ltd., boiling point: 162 to 176°C), and after cooling, add 18 parts of toluene diisocyanate and react at 100°C until the isocyanate group disappears. , to obtain an epoxy equivalent of 455, a rosin-modified epoxy resin solution (I-2) with a heating residual component of 70%.

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Abstract

The invention provides an epoxy-resin coating composite, which comprises rosin modified epoxy resin and acrylic acid modified epoxy resin.The rosin modified epoxy resin is obtained by the reaction of epoxy resin, rosin, fatty acids and polyisocyanates compounds, wherein one molecule of the epoxy resin has at least two epoxy radicals.

Description

technical field [0001] The present invention relates to epoxy resin coating compositions useful for heavy duty coatings. Background technique [0002] In the field of heavy-duty anti-corrosion coatings, epoxy resin coating compositions with excellent corrosion resistance, chemical resistance, adhesion, etc., which have the functions of protecting bridges, mechanical equipment, tanks, etc., are widely used. The function of protecting steel structures such as steel structures or metal products such as steel plates and steel pipes from external corrosive environments. Since epoxy resins are generally highly polar, they can be used by dissolving in organic solvents with strong solubility, such as aromatic hydrocarbons such as toluene and xylene, and ketones such as methyl ethyl ketone. [0003] However, although these organic solvents show excellent solubility for epoxy resins, on the other hand, they are highly harmful to the human body, and have low flash points and boiling p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D151/08C09D7/12C09D5/08
Inventor 野阪邦义加纳央横田雅之浜村寿弘
Owner KANSAI PAINT CO LTD
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