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Hard coating composition

A technology of hard coating and composition, applied in the direction of coating, epoxy resin coating, etc., can solve the problems such as difficult to form a high-hardness protective layer, and achieve improved storage stability, good elongation, transparency and elongation sex enhancing effect

Inactive Publication Date: 2014-09-10
NIPPON PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the number of remaining (meth)acryloyl groups that will be cured in the subsequent energy ray irradiation step decreases, so there is a problem that it is difficult to form a high-hardness protective layer even when energy ray is irradiated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111]JER1009 (bisphenol A type epoxy resin, number average molecular weight 3800, manufactured by Mitsubishi Chemical Corporation) solid content 15 parts by mass, Cymel 325 (melamine resin, melamine mononuclear body content rate 48% by mass, manufactured by Japan Cytech Indastries Co., Ltd.) Components 30 parts by mass, Ilugakyua 184 (1-hydroxy-cyclohexyl-phenyl-ketone, manufactured by BASF Corporation) 5 parts by mass of solid content, and Aronics M400 (a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate, Toagosei Co., Ltd.) 50 parts by mass of solid content was mixed with methyl ethyl ketone to obtain 40 mass % of non-volatile content to obtain a hard coat composition.

[0112] The obtained hard coat composition was coated on a PET film (thickness 100 μm) with a bar coater, and heated at 150° C. for 1 minute to remove the solvent to obtain a thermosetting hard coat layer with a film thickness of 5 μm.

[0113] Then use the hard coating with a hig...

Embodiment 2

[0115] Except having changed jER1009 into jER1004 (bisphenol A type epoxy resin, number average molecular weight 1400, the Mitsubishi Chemical Corporation make), it carried out similarly to Example 1, and obtained the hard-coat composition and hard-coat film.

Embodiment 3

[0117] Except having changed jER1009 into jER1010 (bisphenol A type epoxy resin, number average molecular weight 5500, the Mitsubishi Chemical Corporation make), it carried out similarly to Example 1, and obtained the hard-coat composition and hard-coat film.

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Abstract

Provided is a hard coating composition that exhibits excellent extensibility, and that is capable of forming a hard coating layer that has high hardness and is transparent. The hard coating composition contains: (a) a bisphenol A-type epoxy resin having a secondary hydroxyl group and / or a bisphenol F-type epoxy resin having a secondary hydroxyl group, each having a number-average molecular weight of 900-7,000; (b) a melamine resin; (c) a photopolymerization initiator; and (d) a multifunctional (meth)acrylate monomer having at least one hydroxyl group, and / or an oligomeric compound having at least one hydroxyl group.

Description

technical field [0001] The present invention relates to a hard coat composition capable of forming a hard coat layer having excellent elongation and high hardness and transparency. Background technique [0002] Hard coats are used in a wide range of applications such as monitors, mobile phones, notebook computers and other IT-mobile devices, other home appliances, daily sundries, interior and exterior of automobiles, etc., and are formed to protect the coated object from damage. As the use of such a hard coat layer increases, there is an increasing demand for good moldability for molded articles having various shapes such as acute angle surfaces and curved surfaces. Therefore, it is desired to maintain the original high hardness of the hard coat layer and also have elongation that can follow various moldings. [0003] From the viewpoint of not impairing the aesthetics of the molded product, the hard coat layer is required to have physical functions such as high hardness and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D4/02C09D5/00C09D7/12C09D161/28
CPCC09D4/00C08G59/5086C09D163/10
Inventor 西冈晋司张贵博
Owner NIPPON PAINT CO LTD
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