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Low-temperature curing primer-topcoat coil coating back paint and preparation method thereof

A technology of coil coating and back coating, applied in anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of poor corrosion resistance, low curing temperature and high temperature, achieve low curing temperature and reduce energy consumption , the effect of simple preparation process

Inactive Publication Date: 2016-03-23
陕西宝塔山油漆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It aims to overcome the defects of high temperature of conventional coil coating back paint curing board, high energy consumption required to produce color-coated board, and poor corrosion resistance, and provide a low curing temperature, fast drying speed, good storage stability and Good workability, good scratch resistance, hardness and corrosion resistance, suitable for the "one coating and one baking" construction application of the processing equipment of domestic color-coated board processing enterprises, the curing board temperature is 199 ° C ~ 216 ° C, 30 ~ 35s curing Film-forming low-temperature curing bottom surface all-in-one coil coating back paint and preparation method thereof

Method used

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  • Low-temperature curing primer-topcoat coil coating back paint and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] A kind of coil coating back paint that the low-temperature curing bottom surface of present embodiment describes, it is made of containing 44 parts by weight B301 high reactivity long-chain type low-hydroxyl polyester resin, 11.2 parts of mixed solvent (being S-150 aromatic hydrocarbon Solvent: mixed dibasic ester DBE=6:4 mixture), 0.8 parts of dispersant BYK104, 0.4 parts of leveling agent polyether modified polyacrylate, 20 parts of rutile titanium dioxide, 0.1 parts of carbon black, 6 parts of functional Anti-corrosion pigment aluminum tripolyphosphate, 5 parts of precipitated barium sulfate, 3 parts of 609 epoxy resin, 6 parts of CYMEL303 amino resin, 3 parts of adhesion promoter Hemings Deqian's PLH, 0.1 part of defoamer BYK1790 and 0.4 Parts of closed dinonyl naphthalene disulfonic acid catalyst.

[0024] The preparation method of a low-temperature curing bottom-surface-integrated coil coating back paint is as follows: 44 parts of B301 high-reactivity long-chain l...

Embodiment 2

[0029] A kind of coil coating back paint that the low-temperature curing bottom surface of present embodiment describes, it is made of containing 45 parts by weight B301 high reactivity long-chain type low-hydroxyl polyester resin, 10 parts of solvent (being S-150 aromatic hydrocarbon solvent : Ethylene glycol butyl ether = 5:5 mixture), 0.4 parts of dispersant BYK110, 0.6 parts of leveling agent fluorine-modified polyacrylate, 18 parts of rutile titanium dioxide, 0.3 parts of carbon black, 8 parts of functional anti-corrosion pigment phosphoric acid Zinc, 7 parts of precipitated barium sulfate, 2 parts of 609 epoxy resin, 6 parts of CYMEL303 amino resin, 2.2 parts of adhesion promoter Hemings Deqian's PLH, 0.1 part of defoamer BYK1790 and 0.4 parts of closed type II Nonyl naphthalene disulfonic acid catalyst composition.

[0030] Add 45 parts of B301 high-reactivity long-chain low-hydroxyl polyester resin, 7 parts of solvent, 0.4 parts of dispersant, and 0.8 parts of leveling...

Embodiment 3

[0034]A kind of coil coating back paint that the low-temperature curing bottom surface of present embodiment describes, it is made of containing 48 parts by weight B301 high reactivity long-chain type low-hydroxyl polyester resin, 10 parts of solvent (being ethylene glycol butyl ether: DBE: S-150 aromatic hydrocarbon solvent: butanol = 4:3:2:1 mixture), 1.1 parts of dispersant BYK104, 0.3 parts of leveling agent polyether modified polyacrylate, 16 parts of rutile titanium dioxide, 0.3 parts Organic lemon yellow, 6 parts of functional anti-corrosion pigment aluminum tripolyphosphate, 4.2 parts of precipitated barium sulfate, 3 parts of 609 epoxy resin, 8 parts of CYMEL303 amino resin, 2 parts of adhesion promoter Hemings Deqian's PLH, It consists of 0.5 parts of defoamer BYK1790 and 0.6 parts of blocked dinonyl naphthalene disulfonic acid catalyst.

[0035] Add 48 parts of B301 high-reactivity long-chain low-hydroxyl polyester resin, 7 parts of solvent, 1.1 parts of dispersant,...

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Abstract

The invention discloses low-temperature curing primer-topcoat coil coating back paint and a preparation method thereof. The low-temperature curing primer-topcoat coil coating back paint is prepared from the following components in mass ratio by stirring and mixing under the rotating-speed stirring condition: 40-48% of saturated polyester resin, 4-8% of amino resin, 2-6% of epoxy resin, 18-25% of pigment, 6-10% of functional anticorrosion pigment, 6-10% of filler, 10-20% of a solvent, 0.4-1.1% of a dispersing agent, 0.3-0.6% of a leveling agent, 0.1-0.5% of a defoaming agent, 2-4% of an adhesion promoter and 0.4-0.8% of a catalyst. The low-temperature curing primer-topcoat coil coating back paint product has low curing temperature and can meet hardness, toughness, corrosion resistance, acid resistance, alkali resistance, heat resistance and processability required by a galvanized steel sheet, and a single coating has excellent adhesive force, machinability and anti-corrosion property. The low-temperature curing primer-topcoat coil coating back paint product is simple in preparation technology, is applicable to being coated on the surfaces of a hot galvanized steel sheet, an electro-galvanized steel sheet and a cold-rolled steel sheet, so as to form a colorful coating protective film, and is also applicable to continuous roller painting of a continuous coating high-speed production line.

Description

technical field [0001] The invention relates to a back paint and a preparation method thereof, in particular to a low-temperature curing bottom-surface-in-one coil coating back paint and a preparation method thereof for the back of a color-coated board. Background technique [0002] Coil coating is a special coating used to coat the surface of steel plates and make pre-coated metal coils. Due to the changeable color, lightness, easy processing and excellent mechanical properties of pre-coated metal coils, it is widely used in construction fields have been widely applied. [0003] According to the characteristics of the application, coil coatings include primers, backcoats and topcoats. These three different types of coatings have different functions and requirements when applied to metal sheets. Conventional coil coatings do not have very high technical requirements for the back paint. They need primer and back paint to match, and "two-coat and two-baking" construction, whi...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D161/32C09D163/00C09D5/08C09D7/12
Inventor 邵海龙张宏洲孙佳佳张新平张翼刘宪文陈安强
Owner 陕西宝塔山油漆股份有限公司
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