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Curable coating composition

A composition and curing technology, applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of laminating steel plates failing to ensure sharpness, and achieve reduced production costs, excellent gloss, basic Excellent physical properties

Inactive Publication Date: 2020-06-05
KCC CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, laminated steel sheets to which the composition is applied have not been able to ensure sufficient distinctness of image, and therefore development of an adhesive composition having excellent adhesion while having excellent distinctness of image is still required

Method used

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  • Curable coating composition
  • Curable coating composition
  • Curable coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-11 and comparative example 1-8

[0060] Curable coating compositions of Examples 1-11 and Comparative Examples 1-8 were prepared by mixing resins, curing agents, pigments, catalysts, solvents, and additives according to the compositions described in Table 1 and Table 2 below. In the following Table 1 and Table 2, the usage-amount unit of each composition is weight%.

[0061] 【Table 1】

[0062]

[0063]

[0064] 【Table 2】

[0065]

[0066] Resin 1: polyester polyol resin (Tg 10°C, Mn 8000, hydroxyl value 12mgKOH / g) 99% by weight and epoxy-modified polyester polyol resin (Tg-55°C, Mn 2,300, hydroxyl value 100mgKOH / g) 1% by weight mixed resin

[0067] Resin 2: polyester polyol resin (Tg 10°C, Mn 8000, hydroxyl value 12mgKOH / g) 95% by weight and epoxy-modified polyester polyol resin (Tg-55°C, Mn 2,300, hydroxyl value 100mgKOH / g) 5% by weight mixed resin

[0068] Resin 3: polyester polyol resin (Tg 0°C, Mn 8000, hydroxyl value 12mgKOH / g)

[0069] Resin 4: polyester polyol resin (Tg 20°C, Mn 10000, hy...

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Abstract

The present invention relates to a curable coating composition for laminated steel sheets which has excellent appearance distinctness and physical properties required for the coating. The curable coating composition according to the present invention comprises a resin and a curing agent, the resin comprises a polyester resin, and the curing agent comprises a blocked isocyanate. The number averagemolecular weight of the polyester resin is 8000-14000, the glass transition temperature Tg is-20-40 DEG C, and the functional group ratio NCO / OH of the polyester resin to the blocked isocyanate is 0.5-1.5.

Description

technical field [0001] The present invention relates to a curable coating composition for a laminated steel sheet which is excellent in distinctness of image appearance and physical properties required for coatings. Background technique [0002] A laminated steel sheet formed by coating a synthetic resin film on a steel sheet is not only excellent in durability, but also resistant to corrosion, so it is not easy to rust, has little color change, and has a beautiful appearance, so it is widely used as various interior and exterior materials. [0003] In general, laminated steel sheets are prepared by coating an adhesive composition on top of a zinc or chromium-plated steel sheet and then adhering a polyvinyl chloride (PVC) film. When PVC film is used, there is an advantage of being able to obtain a laminated steel sheet with excellent sharpness of image, but due to the discharge of dioxin and toxic additives from additives such as lead, organotin, and zinc used in the prepara...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D7/63
CPCC08K2003/2241C08L2205/025C08L2205/03C09D167/00C09D7/63C08L67/00C08K5/29C08K3/22C08K3/04C08G18/246C08G18/42C08G18/4202C08G18/73C08G18/808C09D175/06
Inventor 孙仁石金宜勳金东建赵益载
Owner KCC CORP CO LTD