High-gloss metallic paint for rolled steel substrate and preparation method and application

A high-gloss, metallic color technology, applied in the field of coatings, can solve the problems of affecting the light reflection effect, low gloss, poor orientation of aluminum powder, etc., to achieve the effect of improving gloss, high gloss, and enhancing orientation.

Active Publication Date: 2017-07-25
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the gloss of metallic coatings for ordinary household appliances can only reach 75-80, while the gloss of plain coatings for household appliances can reach more than 90. The reason is that the orientation of aluminum powder in the coating directly affects the light reflection effect. Poor alignment of aluminum powder, more light diffuse reflection, and lower gloss

Method used

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  • High-gloss metallic paint for rolled steel substrate and preparation method and application
  • High-gloss metallic paint for rolled steel substrate and preparation method and application
  • High-gloss metallic paint for rolled steel substrate and preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Such as figure 1 as shown, figure 1 It is a schematic flow chart of the preparation method of the high-gloss metallic paint for coil steel substrates of the present invention.

[0048] The preparation method of saturated polyester resin comprises the following steps:

[0049] Step 1: Add 130g of neopentyl glycol, 20g of trimethylolpropane, 5g of hexanediol, 158.5g of adipic acid, 8.5 g terephthalic acid, 140g isophthalic acid, start heating under the protection of nitrogen or carbon dioxide and other inert gases, start stirring when the kettle temperature reaches 140°C, then add 1.1g dibutyltin dilaurate to control the temperature of the material in the kettle At 240-250°C, react for 8 hours.

[0050] The second step: Then add 50g of xylene into the reactor, take a sample every 30 minutes, and test the acid value until the acid value of the material <3KOHmg / g is the end of the reaction.

[0051]Step 3: cool down to 120°C, add 212g of S-100 solvent oil with a solid c...

Embodiment 2

[0057] The preparation method of saturated polyester resin comprises the following steps:

[0058] Step 1: Add 70g neopentyl glycol, 20g trimethylolpropane, 10g hexanediol, 400g adipic acid, 50g para Phthalic acid, 150g of isophthalic acid, under the protection of inert gas such as nitrogen or carbon dioxide, start to heat up, start stirring when the temperature of the kettle reaches 140°C, then add 5g of dibutyltin dilaurate, and control the temperature of the material in the kettle at 240~ 250°C, react for 8 hours.

[0059] Step 2: Then add 200g of xylene into the reactor, take a sample every 30 minutes, and test the acid value until the acid value of the material <3KOHmg / g is the end of the reaction.

[0060] Step 3: Cool down to 120°C, add 200g of No. S-100 solvent oil with a solid content of 60%, filter, and set aside; the glass transition temperature of the saturated polyester resin is 22°C.

[0061] Cellulose acetate butyrate predispersion: add 10g cellulose acetate b...

Embodiment 3

[0066] The preparation method of saturated polyester resin comprises the following steps:

[0067] Step 1: Add 170g neopentyl glycol, 120g trimethylolpropane, 10g hexanediol, 100g adipic acid, 50g para Phthalic acid, 50g isophthalic acid, under the protection of inert gas such as nitrogen or carbon dioxide, start to heat up, start stirring when the kettle temperature reaches 140°C, then add 0.2g dibutyltin dilaurate, control the temperature of the material in the kettle at 240°C ~250°C, react for 8 hours.

[0068] The second step: Then add 20g of xylene into the reactor, take a sample every 30 minutes, and test the acid value until the acid value of the material <3KOHmg / g is the end of the reaction.

[0069] Step 3: Cool down to 120°C, add 10g of S-100 solvent oil with a solid content of 60%, filter, and set aside; the glass transition temperature of the saturated polyester resin is 25°C.

[0070] Cellulose acetate butyrate predispersion: add 10g cellulose acetate butyrate C...

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Abstract

The invention discloses a high-gloss metallic paint for a rolled steel substrate. The high-gloss metallic paint is prepared from the following components in parts by weight: 40-60 parts of saturated polyester resin, 6-12 parts of amino resin, 14-20 parts of an aluminum paste pre-dispersed material, 0.1-1.0 part of a defoaming agent, 0.1-1.0 part of a flatting agent, 0.1-10 parts of a cellulose acetate butyrate pre-dispersed material, 0.1-1.0 part of an acid catalyst and 5-30 parts of a solvent. The fluidity of the paint can be improved by cellulose acetate butyrate in the high-gloss metallic paint for the rolled steel substrate, and the viscosity of the paint is controlled, thereby playing a role in strengthening directional alignment of aluminum powder in a coating. The levelling property of the coating can be improved by the flatting agent in the high-gloss metallic paint for the rolled steel substrate, so that regular arrangement of the aluminum powder in the coating is driven and the glossiness is improved.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a high-gloss metallic coating for coil steel substrates, a preparation method and application. Background technique [0002] Pre-coated coil material is a kind of decorative material that adopts a fast automatic assembly line production method, after cleaning, surface treatment, coating on a continuous metal sheet, and forming a film after curing to achieve the specified physical and mechanical properties. Pre-painting the coiled steel strips not only has the direct economic benefits of reproduction, but more importantly, it can beautify the finished products and protect them from corrosion, prolong the service life of the finished products and increase the use value. [0003] At present, coiled steel is mainly used in two fields of building materials and home appliances. Coil steel coatings for building materials mainly play the role of anti-aging and corrosion res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/02C09D7/12C08G63/20C08G63/78C08G63/85
CPCC08G63/20C08G63/78C08G63/85C08K2003/0812C08L2205/035C09D7/61C09D167/02C08L1/14C08L61/28C08L91/00C08K3/08C08L61/32
Inventor 庄晓彤田昕宫原贵宏
Owner NIPPON PAINT IND COATINGS SHANGHAI
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