Aqueous finish paint used for coiled material

A water-based topcoat, water-soluble technology, applied in polyester coatings, coatings and other directions, can solve the problems of poor water resistance of the coating film, and achieve the effects of good water resistance, energy saving and good flexibility

Active Publication Date: 2009-10-07
ZHEJIANG TRANSFER PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by this invention is to overcome the defects in the above-mentioned prior art, and provide a water-based topcoat that uses sodium-substituted sulfoisophthalic acid to realize water-soluble polyester resin, so as to solve the problem of poor water resistance of existing coating films. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 25Kg of 5-sodiosulfoisophthalic acid, 30Kg of 1,4 cyclohexanedicarboxylic acid, 40Kg of hexahydrophthalic anhydride, 155Kg of isophthalic acid, 44Kg of adipic acid, 32.5Kg of 1,6 - Add hexanediol, 142Kg of neopentyl glycol, 5.5Kg of trimethylolpropane, and 0.5Kg of monobutyl dihydroxytin chloride into the reaction pot, slowly heat to 150-220°C, and react until the acid value is less than Below 5.0mgKOH / g, cool to 100-150°C, add propylene glycol methyl ether and dilute, wait until the temperature is lowered to 80-95°C, add deionized water and dilute to form a water-soluble polyester resin with 45% solid content, filter, and pack.

[0024] The performance test results are as follows:

[0025] project

Embodiment 2

[0027] Throw 18Kg 5-sodiosulfoisophthalic acid, 100Kg isophthalic acid, 70Kg hexahydrophthalic anhydride, 42Kg adipic acid, 23Kg1, 4-cyclohexyl dicarboxylic acid, 16Kg trimethylolpropane, 97Kg Add neoglutaric acid, 90Kg 1, 6-hexanediol, 0.065Kg chloromonobutyldihydroxytin into the reaction pot, slowly raise the temperature to 150-220°C to react until the acid value is less than 5mgKOH / g, cool to 100-150 ℃, add propylene glycol methyl ether and dilute, wait until the temperature drops to 80-95 ℃, then dilute with deionized water to form a water-soluble polyester resin with a solid content of 45%, filter and pack.

[0028] The performance test results are as follows:

[0029] project

Embodiment 3

[0031] Cast 40Kg 5-sodiosulfoisophthalic acid, 60Kg 1, 4 cyclohexanedicarboxylic acid, 120Kg hexahydrophthalic anhydride, 27.5 isophthalic acid, 45Kg adipic acid, 130Kg neopentyl glycol, 91.8Kg1 , 6-hexanediol, 5.0Kg trimethylolpropane, 1.05Kg chloromonobutyl dihydroxytin into the pot to heat up, keep warm at 150-220°C until the acid value is less than 5.0mgKOH / g, cool to 100-150 °C, dilute with propylene glycol methyl ether, wait until the temperature drops to 80-95 °C, then dilute with deionized water to form a water-soluble polyester resin with a solid content of 45%, filter and pack.

[0032] The performance test results are as follows:

[0033] project

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Abstract

The invention discloses an aqueous finish paint used for coiled material. For a present aqueous paint used for steel band, in the preparation of epoxy modified polyester resin in the paint, it becomes aqueous must after amine neutralization, thereby, the steel band coated by the paint has the disadvantage of poor coating film water resistance. The aqueous finish painting in the invention comprises the following components: water soluble saturated polyester resin 45-50%, pigment 25-35%, aqueous defoaming agent 0.2-0.5%, aqueous wetting and dispersing agent 0.5-0.8%, aqueous leveling agent 0.3-1.0%, ethers solvent 2-5%, water 5-10%, water soluble amino resin 5-8%baking vanish cooling catalyst 0.2-0.8%, delustering powder 0-1.0% and aqueous anti-scratch agent 0-0.1%. The invention realizes water solubility of polyester resin by dicarboxybenzenesulfonic acid sodium salt, does not need amine neutralization, and achieves coating film with good water resistance.

Description

technical field [0001] The invention relates to coil coatings for construction and industrial packaging, in particular to a water-based topcoat for coils. Background technique [0002] At present, the coil coatings on the market are mostly solvent-based. Due to the high total volatile organic solvents (TVOC), these coil coatings have relatively large environmental pollution, and the recycling is limited, resulting in waste of resources and harm to people. cause harm to the health of people, and do not meet the requirements of environmental protection. At present, research work on the application of water-based coil coatings has been carried out at home and abroad. The disadvantages of most existing water-based coil coatings are poor outdoor durability, and chalking, fading, and loss of light will occur when used in open places. Chinese patent application 200710047452.5 discloses a water-based coating for steel strips. When preparing the epoxy-modified polyester resin, it mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D167/02
Inventor 钱炳江吴勇胡娟施建权
Owner ZHEJIANG TRANSFER PAINT CO LTD
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