Resin laminate

A technology of laminates and resin layers, applied in synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problem of differences in wear resistance and scratch resistance, inability to achieve pencil hardness, hindering transparency Problems such as property, etc., to achieve the effect of excellent processability

Inactive Publication Date: 2014-11-05
NIPPON STEEL CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the examples shown as specific examples of these methods, pencils are made by using polyethylene terephthalate films and cellulose triacetate films, which are inherently harder than polycarbonate resins, as substrates. Hardness ranges from 4H to 6H. Although this effect is confirmed, pencil hardness cannot be achieved with only a thin hard coat layer, so a hard base layer and auxiliary functions of inorganic materials are required
Therefore, these base layers and inorganic materials become important factors that hinder transparency, and are not suitable for display devices such as liquid crystal displays.
[0006] In addition, an attempt has been made to form a two-layer coating film with a specific film thickness on a polycarbonate resin substrate using polycarbonate resin, which is a resin with low pencil hardness. Formate acrylate, polyfunctional oligomers, polyfunctional monomers, monofunctional monomers, and ultraviolet curable resins with a specific number of functional groups, but the maximum pencil hardness in this technology is 4H, which is not sufficient (see Patent Document 7)
[0007] In addit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] (Preparation of hard resin layer)

[0101] 85 parts by weight of dipentaerythritol hexaacrylate and 15 parts by weight of PMMA were heated and kneaded to 110°C, and then 2.5 parts by weight of 1-hydroxycyclohexyl phenyl ketone as a photopolymerization initiator was mixed to obtain a curable resin composition.

[0102] Next, using a roll coater, the curable resin composition was cast (cast) on the peeled PET so that the thickness became 0.15 mm, and the other peeled PET was laminated on the casted After the curable resin composition, use a 30W / cm high-pressure mercury lamp to 4000mJ / cm 2 The accumulated exposure dose is cured, and the PET that has undergone the peeling treatment is completely peeled off to obtain a sheet-shaped hard resin layer with a predetermined thickness. The tensile elastic modulus and total light transmittance of the obtained hard resin layer were measured. The results are shown in Table 1.

[0103] (Manufacturing of resin laminates)

[0104] A...

Embodiment 2

[0106] Except having made the compounding composition into the weight ratio shown in Table 1, it carried out similarly to Example 1, and obtained the hard resin layer and the resin laminated body. Table 1 shows the evaluation results of the molded articles obtained.

Synthetic example 1

[0108] 400 ml of 2-propanol (IPA) as a solvent and 5% tetramethylammonium hydroxide aqueous solution (TMAH aqueous solution) as a basic catalyst were placed in a reaction vessel equipped with a stirrer, a dropping funnel, and a thermometer. 150 ml of IPA and 126.9 g of 3-methacryloxypropyltrimethoxysilane (MTMS: SZ-6030 manufactured by Dow Corning Toray Silicone Co., Ltd.) were added to the dropping funnel, and the reaction vessel was dripped at room temperature for 30 minutes while stirring the reaction vessel. Add MTMS to the IPA solution. After the dropwise addition of MTMS was completed, the mixture was stirred for 2 hours without heating. After stirring for 2 hours, the solvent was removed under reduced pressure and dissolved in 500 ml of toluene. The reaction solution was washed with saturated brine until it became neutral, and then dehydrated with anhydrous magnesium sulfate. Anhydrous magnesium sulfate was filtered off and concentrated to obtain 86 g of a cage-type s...

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Abstract

The invention provides a resin laminate having relatively high surface hardness and high transparency. The resin laminate has a hard resin layer and a substrate layer. The hard resin layer is formed by a curing resin composition with multi-functional (methyl)acryloyl monomers as an essential ingredient, has a three-dimensional cross-linking structure and a thickness of 25 [mu]m-250[mu]m. The substrate layer is formed by a monolayer thermoplastic resin or two or more layers of a multi-layer thermoplastic resin. An independent tensile elasticity modulus of the hard resin layer is 2.000-4,000 MPa; and a total light transmittance is over 90%. Besides, a ratio (t1/t2) of a total thickness (t1) of the substrate layer to the thickness (t2) of the hard resin layer is 0.25-10; and a scratch hardness of the resin laminate is over 40 g.

Description

technical field [0001] The present invention relates to a resin laminate having excellent surface hardness, transparency, and molding processability, and particularly to a resin laminate suitable for a display panel as a transparent multilayer sheet. Background technique [0002] In electronic equipment such as digital cameras and mobile phones, as substrates of liquid crystal displays, etc., or as protective plates for protecting the surface of liquid crystal displays from scratches, contamination, etc., acrylic, polycarbonate, poly Laminates made of thermoplastic resins such as ethylene phthalate. These laminated resins have excellent optical properties and are less likely to be broken than glass, so they have come to be widely used in fields where glass has been conventionally used in recent years. However, thermoplastic resins such as acrylic, polycarbonate, and polyethylene terephthalate have disadvantages in that surface hardness, abrasion resistance, and scratch resi...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B7/12
CPCB32B7/12B32B27/08B32B27/308B32B2307/412B32B2307/584
Inventor 北村健一岩下新一佐藤惠后藤祯寿山田裕明熊田直刚矶崎正义林敬一
Owner NIPPON STEEL CHEMICAL CO LTD
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