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Epoxy resin combination and coating combination containing the same

A technology of epoxy resin and composition, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of coating operability, processability reduction, weak solvent solubility reduction, and difficulty in modifying epoxy resin, etc., to achieve The effects of a wide degree of freedom of choice, good processability, and excellent coating workability

Active Publication Date: 2013-07-17
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when the molecular weight of the modified epoxy resin is designed to be a high value in order to improve the initial dryness at room temperature, its solubility to weak solvents decreases, and in addition, the viscosity of the coating increases with the increase of the resin viscosity, thereby The problem of lower coating workability and workability occurs
Therefore, it is very difficult to design modified epoxy resins with improved initial drying properties without compromising solubility in weak solvents and processability

Method used

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  • Epoxy resin combination and coating combination containing the same
  • Epoxy resin combination and coating combination containing the same
  • Epoxy resin combination and coating combination containing the same

Examples

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Embodiment

[0058] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples. In addition, "parts" and "%" in the following examples represent "parts by mass" and "% by mass", respectively.

[0059] Preparation of Rosin Modified Epoxy Resin Solution

manufacture example 1

[0061] In a reaction device having a heating device, a stirrer, and a nitrogen introduction pipe, 185 parts of "JER828" (trade name, manufactured by Japan Epoch Resin Co., Ltd., a bisphenol A type epoxy resin with an epoxy equivalent of 185) and 51 parts of gum rosin were charged. part and 98 parts of soybean oil fatty acid, heated to 160°C while stirring under a dry nitrogen atmosphere, and reacted until the acid value was 0. After adding 160 parts of "Swazel 1000" (trade name, manufactured by Cosmo Petroleum Co., Ltd., boiling point: 162 to 176°C) and cooling, 38 parts of diphenylmethane-4,4'-diisocyanate were added, and at 100°C The reaction was carried out until the isocyanate group disappeared to obtain a rosin-modified epoxy resin solution (I) with an epoxy equivalent of 745 and a heating residual component of 70%.

manufacture example 2

[0063] In a reaction device having 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), tall rosin 17 parts and 56 parts of dehydrated castor oil fatty acids were heated to 160°C while stirring in a dry nitrogen atmosphere, and reacted until the acid value became 0. After adding 145 parts of "Suwazoru 1000" and cooling, put 18 parts of toluene diisocyanate and react at 100°C until the isocyanate group disappears to obtain a rosin-modified ring with an epoxy equivalent of 455 and a heating residue of 70%. Oxygen Resin Solution (II).

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Abstract

The invention relates to an epoxy resin combination and a coating combination containing the same. The epoxy resin combination comprises a modified epoxy resin with an epoxy group obtained by reacting an epoxy resin with at least two epoxy groups in one molecule, a rosin group, a fatty acid and a polyisocyanate compound and an amine curing agent.

Description

technical field [0001] The present invention relates to epoxy resin compositions and coating compositions containing them. Background technique [0002] Epoxy resin has excellent adhesion to substrates, so it has been widely used in various fields such as coatings, adhesives, and sealants. For example, in the field of anti-corrosion coatings, epoxy resin has been used as the main agent, and the development of coatings containing polyamines as curing agents. [0003] In the field of anticorrosion coatings mentioned above, by using a fatty acid-modified epoxy resin to which a fatty acid or the like has been added as an epoxy resin, it is possible to achieve both stress relaxation and corrosion resistance of the coating film. [0004] On the other hand, in recent years, there has been a demand for the development of paints that are soluble in so-called weak solvents, which are organic solvents such as mineral spirits, which have a high flash point and a high boiling point, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/14C08G59/16C08G59/50C09D163/10
Inventor 饭岛英基伊藤圭
Owner KANSAI PAINT CO LTD
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