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Curable composition for flexible hard coat

A curable composition and curable technology, applied in coatings, instruments, optics, etc., can solve problems such as non-stretchability

Active Publication Date: 2021-09-14
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, multifunctional acrylates are generally not stretchable due to their high crosslink density
In this way, there is a trade-off relationship between the stretchability and scratch resistance of the hard coat layer, and it is a problem to balance the properties of both.

Method used

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  • Curable composition for flexible hard coat
  • Curable composition for flexible hard coat
  • Curable composition for flexible hard coat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0123] Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples.

[0124] In addition, in the examples, the apparatus and conditions used for the preparation of the samples and the analysis of the physical properties are as follows.

[0125] (1) Coating with a bar coater

[0126] Device: PM-9050MC manufactured by SMT Co., Ltd.

[0127] Bar: A-Bar OSP-15 manufactured by OSG SYSTEM PRODUCTS Co., Ltd., with a maximum wet film thickness of 15 μm (equivalent to WIREBAR #6.6).

[0128] Coating speed: 4m / min.

[0129] (2) Oven

[0130] Apparatus: Dust-free dryer DRC433FA manufactured by Advantec Toyo Co., Ltd.

[0131] (3) UV curing

[0132] Apparatus: CV-110QC-G manufactured by Heraeus Co., Ltd.

[0133] Lamp: High-pressure mercury lamp H-bulb manufactured by Heraeus Co., Ltd.

[0134] (4) Gel Permeation Chromatography (GPC)

[0135] Apparatus: HLC-8220GPC manufacture...

manufacture example 1

[0173] [Production Example 1] Production of Surface Modifier SM

[0174] 1.19 g (0.5 mmol) of PFPE1, 0.52 g (2.0 mmol) of BEI, 0.017 g (0.01 times the total mass of PFPE1 and BEI) of DOTDD, and 1.67 g of MEK were charged into the spiral tube. This mixture was stirred at room temperature (about 23° C.) for 24 hours using a Starer Chip to obtain a 50% by mass MEK solution of the surface modifier SM as the target compound. The weight average molecular weight: Mw of the obtained SM measured in terms of polystyrene by GPC was 3000, and the degree of dispersion: Mw (weight average molecular weight) / Mn (number average molecular weight) was 1.2.

Embodiment 1～ Embodiment 3、 comparative example 1～ comparative example 4

[0176] The following components were mixed as described in Table 1 to prepare a curable composition having a solid content concentration described in Table 1. In addition, here, solid content means components other than a solvent. In addition, in Table 1, [part] shows [part by mass]. This curable composition was coated on an A4 size double-sided easy-adhesive PET film [Toray Co., Ltd. Lumirror (trademark registration) U403, thickness 100 μm] with a bar coater to obtain a coating film. The coating film was dried in an oven at 120° C. for 3 minutes to remove the solvent. The resulting film was irradiated with an exposure dose of 1200mJ / cm in air 2 By exposing to UV light, a hard coat film having a hard coat layer (cured film) having a layer (film) thickness of about 2 μm was produced.

[0177] Scratch resistance, stretchability, buckling resistance, pencil hardness, and antifouling properties of the obtained hard coat film were evaluated. The evaluation methods of scratch re...

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Abstract

The invention provides a curable composition capable of forming a hard coating having extremely high scratch resistance, hardness, stretchability, bendability, and stain resistance. Disclosed are: a curable composition comprising (a) 100 parts by mass of an active energy ray-curable non-oxyethylene-modified polyfunctional monomer, (b) 30 parts by mass to 150 parts by mass of an active energy ray-curable oxyethylene-modified polyglycerin polyfunctional monomer, (c) 0.05 parts by mass to 10 parts by mass, per 100 parts by mass in total of the component (a) and the component (b), of a perfluoropolyether including a poly(oxyperfluoroalkylene) group and having, on both terminals of the molecular chain thereof, an active energy ray-polymerizable group with an urethane bond interposed therebetween (excluding perfluoropolyethers having a poly(oxyalkylene) group between the poly(oxyperfluoroalkylene) group and the urethane bond), and (d) 1 part by mass to 20 parts by mass, per 100 parts by mass in total of the component (a) and the component (b), of a polymerization initiator that generates radicals by active energy rays; and a hard coat film including a hard coating formed by the composition.

Description

technical field [0001] The present invention relates to a curable composition useful as a hard coat layer forming material applied to surfaces of various display elements such as curved touch panel displays. Specifically, it relates to a curable composition capable of forming a hard coat layer having extremely high scratch resistance, hardness, elongation, buckling resistance, and antifouling properties. Background technique [0002] In many electronic devices, such as home appliances such as televisions, communication devices such as mobile phones, office equipment such as copiers, entertainment equipment such as game machines, medical equipment such as X-ray imaging devices, and living equipment such as microwave ovens, there are devices that can be operated with fingers. Touch panel displays using liquid crystal display elements or OLED (organic EL) display elements. These touch panel displays are equipped with a transparent plastic substrate laminated with a hard coat l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D4/06C08J7/046
CPCC08J7/04C09D7/20C09D5/00C08F220/20C09D4/00C08F290/06C08F290/062C08F220/28C08F222/10C08F2/50C09D4/06C08J7/046G02B1/14
Inventor 原口将幸辻本晴希
Owner NISSAN CHEM IND LTD
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