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Cationic paint composition

A composition and cationic technology, applied in the direction of electrophoretic coatings, epoxy resin coatings, coatings, etc., can solve the problem of not effectively improving the anti-rust ability of steel plates, insufficient compatibility of epoxy resins, and damage to the anti-corrosion performance of coating films, etc. question

Inactive Publication Date: 2004-12-15
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that these materials are not fully compatible with epoxy resin, and if they are mixed too much, not only cannot effectively improve the anti-rust ability of the steel plate, but also destroy the anti-corrosion performance of the coating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0102] Preparation Example 1 Polyol modified epoxy resin containing amino groups

[0103] 300 g of ε-caprolactone was added to 400 g of PP-400 (polypropylene glycol, molecular weight 400, manufactured by Sanyo Chemical Industry Co., Ltd., trade name), then heated to 130°C, added with 0.01 g of tetrabutoxide titanium, and heated again to 170°C. Maintaining this temperature, the amount of unreacted ε-caprolactone was monitored by measuring the infrared absorption spectrum of samples taken from time to time. When the reaction progress was greater than 98%, the reaction mixture was cooled to obtain Modifier 1.

[0104] 400 g of bisphenol A and 0.2 g of dimethylbenzylamine were added to 1000 g of Epicote 828EL (epoxy resin, epoxy equivalent 190, molecular weight 350, manufactured by Japan Epoxy Resin Co., Ltd., trade name), and reacted at 130°C until The epoxy equivalent becomes 750. 120 g of nonylphenol was added thereto, and the reaction was carried out at 130°C until the ep...

preparation Embodiment 2

[0105] Preparation Example 2 Polyol modified epoxy resin containing amino groups

[0106] 400 g of ε-caprolactone was added to 660 g of BPE-100 (bisphenol A polyethylene glycol, molecular weight 660, manufactured by Sanyo Chemical Industry Co., Ltd., trade name), and heated to 130°C. Then 0.01 g of titanium tetrabutoxide was added and heated to 170°C. Maintaining this temperature, the amount of unreacted ε-caprolactone was monitored by measuring the infrared absorption spectrum of samples taken from time to time. Modifier 2 was synthesized by cooling the reaction mixture when the reaction progress was greater than 98%.

[0107] Resin No. 2 with an amine value of 40 and a resin solid content of 80% was prepared according to a similar operation procedure in Preparation Example 1, except that Modifier 2 was used instead of Modifier 1.

preparation Embodiment 3

[0108] Preparation Example 3 Polyol modified epoxy resin containing amino groups

[0109] To 103 grams of diethylenetriamine was added 697 grams of ε-caprolactone and heated to 130°C. Then 0.01 g of titanium tetrabutoxide was added and heated to 170°C. Maintaining this temperature, the amount of unreacted ε-caprolactone was monitored by measuring the infrared absorption spectrum of samples taken from time to time. When the reaction progress was greater than 98%, the reaction mixture was allowed to cool to synthesize Modifier 3.

[0110] Resin No. 3 with an amine value of 40 and a resin solids content of 80% was prepared according to a similar operation procedure in Preparation Example 1, except that Modifier 3 was used instead of Modifier 1.

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Abstract

The present invention provides a cationic paint composition containing as resin component a polyol-modified amino group-containing epoxy resin obtained by reacting an epoxy resin with epoxy equivalent 180 to 2500 with a alkyl phenol and / or a carboxylic acid; a polyol obtained by adding a caprolactone to a compound containing a plurality of active hydrogen groups and an amino group-containing compound.

Description

Field of Invention [0001] The present invention relates to a cationic coating composition, more particularly, to a cationic electrodeposition coating composition capable of forming a cured coating film having excellent properties such as throwing power, steel plate rust prevention ability and the like. technical background [0002] Cationic electrodeposition coating compositions have been mainly used as an electrodeposition coating for primers for automobile bodies and other wide-ranging uses, and products having various properties have been developed so far. For example, a cationic electrodeposition coating composition has been proposed which contains a binder resin containing an epoxy resin containing amino and / or quaternary ammonium groups as water-solubility enhancing groups and using a Plasticizers such as polyamide, polyester, polyether, etc. are used for internal plasticization, and have excellent corrosion resistance and good steel plate rust resistance and adhesion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/56C08G59/62C09D5/44
CPCC08G59/56C08G59/626C09D5/4434C08G59/62Y10T428/31511Y10T428/31529
Inventor 西口滋朗神门孝司御堂河内奖富永章
Owner KANSAI PAINT CO LTD
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