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Precoated coil coating for adhering polyester film and using method thereof

A technology of coil coating and polyester film, which is applied in the direction of polyester coating, coating, and the device for coating liquid on the surface, etc. It can solve the problems that cannot meet the use requirements, and achieve simple and practical use methods and good adhesion , the effect of firm adhesion

Active Publication Date: 2009-12-16
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, the quality of the ECM board is not only related to the quality of the PET film used, but also related to the quality of the pre-coated coil coating used to bond the PET film, because between the coating and the substrate and between the coating and the PET film The adhesion of PET film determines the decorative and protective effect of PET film on household appliances. In addition, household appliances also have higher requirements on the durability and boiling resistance of the coating film, so the existing pre-coated coil coatings are directly used as adhesive polyester films. The pre-coated coil coatings are not up to the use requirements

Method used

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  • Precoated coil coating for adhering polyester film and using method thereof
  • Precoated coil coating for adhering polyester film and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 prepares the polyester resin PE-1~PE-6 that has hydroxyl functional group

[0019] 1. The formula and main parameters are shown in Table 1

[0020] Table 1

[0021]

[0022] Note 1: HY-C-02 thinner is the product brand of Jiangsu Hongye Coating Technology Industry Co., Ltd.;

[0023] 4100 is the brand name of domestic dibutyltin oxide esterification catalyst;

[0024] Note 2: The acids and alcohols used to prepare polyester resins with hydroxyl functional groups are not limited to the raw materials listed in Table 1;

[0025] 2. Synthesis process

[0026] In the four-neck flask equipped with stirring, thermometer, water separator, fractionating column, and inert gas inlet, add the remaining raw materials except HY-C-02 thinner according to the formula in Table 1, and feed inert gas from the inert gas inlet. Slowly raise the temperature under the protection of inert gas, reflux reaction at 140°C, heat up to 230°C in 4 to 5 hours, and keep the tem...

Embodiment 2

[0027] Example 2 Preparation of Precoated Coil Coatings 1-6 for Adhesive Polyester Film

[0028] (1) The formula of coatings 1-6: it is composed of the following components, and the mass percentage of each component is as follows:

[0029] The film-forming resin is 20% to 35% in solid terms, the additive is 0.5% to 5%, the pigment and filler is 20% to 35%, and the solvent is 25% to 50%. Among them, the film-forming resin is composed of number average molecules It is composed of polyester resin with hydroxyl functional group and cross-linked resin with a quality of 3500-20000 and a hydroxyl value of 6-35. In terms of resin solids, the polyester resin with hydroxyl functional group is 70%-95%, and the cross-linked resin is 5%. %~30%, the specific formula is shown in Table 2.

[0030] Table 2

[0031] components

raw material name

Raw material specification

Dosage, g

Paint 1

Dosage, g

Paint 2

Dosage...

Embodiment 3

[0048] Embodiment 3 uses precoated coil material coating thermal lamination bonding polyester film of the present invention to prepare polyester film laminated precoated coil sample:

[0049] (1) coating the precoated coil coating of the present invention on the precoated coil surface with primer

[0050] How to use it

[0051] 1. Take a cold-rolled steel plate of 12cm×15cm×0.5mm, wash it, and treat it with chromium treatment solution according to the existing method;

[0052] 2. Bake in an oven at 120°C for 30s and take it out;

[0053] 3. On the dried steel plate, use 10 # Scratch coat the wire rod with HY-JD-101-3 white primer, dry it, and its dry film thickness is 4-6 μm;

[0054] 4. Use 26 on the white primer film # The pre-coated coil coating of the present invention prepared in Example 2 of wire bar scraping is dried after drying (furnace temperature: 280 ℃; baking time: 45~46s; board temperature: 216~232 ℃), after taking out from oven, its The total thickness of t...

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Abstract

The invention relates to precoated coil coating for adhering a polyester film and a using method thereof. The precoated coil coating comprises the following compositions in percentage by mass: 20 to 35 percent of film-forming resin in solid, 0.5 to 5 percent of an auxiliary agent, 20 to 35 percent of pigment and filling, and 25 to 50 percent of solvent, wherein the film-forming resin consists of 70 to 95 percent of polyester resin which is provided with hydroxy functional group and has number average molecular weight of between 3,500 and 20,000 and a hydroxyl value of between 6 and 35, and 5 to 30 percent of crosslinked resin. The using method is to directly coat the precoated coil coating for adhering the polyester film on a steel plate which is treated by chemical transforming solution and laminate and adhere the polyester film on site, or directly coat the precoated coil coating on a precoated coil which is precoated with priming coat, bake and cure the coil, and laminate and adhere the polyester film on site. The polyester film laminated precoated coil prepared by the precoated coil coating has excellent adhesive force, cup drawing and water boiling resistance.

Description

technical field [0001] The present invention relates to a precoated coil coating for bonding polyester film and a method of using the same. Background technique [0002] Pre-coated coil coating is a type of coating that has developed rapidly in recent years. It can be pre-coated on the surface of various coils such as cold-rolled steel, galvanized steel, aluminum, galvanized aluminum and galvanized steel to make pre-coated coils. material. In addition to being used in the construction sector, pre-coated coils are also increasingly used in household appliances. Among them, polyester (hereinafter referred to as PET) film laminated pre-coated coil (referred to as ECM board) is a primer with a certain film thickness rolled on the pre-passivated steel plate, which is quickly forced to bake and cure at high temperature (generally, the temperature range of the board is 204 ~241°C), it is prepared by quickly laminating PET film, which is a very important type of product in pre-coa...

Claims

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Application Information

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IPC IPC(8): C09D167/00B05D7/16
Inventor 王利群吴奎录冯春苗李大鸣
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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