Method for producing (meth)acrylic resin composition, method for producing (meth)acrylic resin molded body, (meth)acrylic resin molded body, front surface plate for liquid crystal display device, and touch panel
A methyl methacrylate, acrylic resin technology, used in the manufacture of (meth)acrylic resin compositions, the manufacture of (meth)acrylic resin moldings, the (meth)acrylic resin moldings, and liquid crystal display devices. In the field of front panels and touch panels, it can solve the problem that the impact strength of acrylic resin is not necessarily sufficient, and achieve the effect of excellent impact resistance and durability
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[0166] The following examples illustrate the present invention. In the description below, "part" means "part by mass". In addition, the haze, impact resistance, and durability of the molded article were evaluated by the following methods.
[0167] (1) Haze
[0168] The initial haze before the thermal shock test and the haze after the thermal shock test of the molded article were measured based on JIS K7136 using Nippon Denshoku Kogyo Co., Ltd. HAZE METER NDH2000 (trade name).
[0169] (2) Impact resistance
[0170] A square test piece with a side of 50 mm was cut out from the molded body, and the impact resistance was evaluated by obtaining the 50% failure height based on ISO 6603-1 in addition to the conditions described in the following falling ball test method.
[0171]
[0172] Before the measurement, the test piece was left to stand in an atmosphere with a temperature of 23° C. and a relative humidity of 50% for 24 hours or more. Then, place the test piece on the su...
manufacture example 1
[0181] Manufacture of mold (1)
[0182] Two stainless steel plates (SUS304, 300 mm in length, 300 mm in width, and 30 mm in thickness) were opposed to each other, and their edges were sealed with a gasket made of soft polyvinyl chloride to prepare a mold (1).
manufacture example 2
[0183] Manufacture of mold (2)
[0184] On a stainless steel plate (SUS304, length 300mm, width 300mm, and thickness 30mm), apply an ultraviolet curable composition comprising succinic acid / trimethylolethane / acrylic acid in a molar ratio of 1 / 2 / 4 condensation mixture 50 parts, 1,6-hexanediol diacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name: C6DA) 50 parts, and benzoin ethyl ether (manufactured by Seiko Chemical Co., Ltd., Product name: Seikuor BEE) 2 servings. A polyethylene terephthalate film (PET film) with a thickness of 12 μm is superimposed on the obtained coating film, and the excess is squeezed out so that the thickness of the coating film becomes 15 μm using a rubber roller with a JIS hardness of 40°. The ultraviolet curable composition was crimped so as not to contain air bubbles in the coating film. The thickness of the coating film depends on the supply amount of the ultraviolet curable composition and the developed area (530cm ...
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