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Methacrylic resin composition, preparation method thereof, particles and moulded body

A methacrylic, resin composition technology, applied in the directions of instruments, optics, optical components, etc., can solve problems such as the generation of carbides, and achieve the effects of less foreign matter content, excellent physical properties and appearance, and excellent continuous production.

Active Publication Date: 2018-01-05
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the extrusion temperature of heat-resistant acrylic resin is higher than that of general acrylic resin, and it is close to the temperature at which the resin decomposes. Therefore, due to the deterioration of the resin, black foreign matter such as carbides and brown foreign matter tend to be generated in large quantities.

Method used

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  • Methacrylic resin composition, preparation method thereof, particles and moulded body
  • Methacrylic resin composition, preparation method thereof, particles and moulded body
  • Methacrylic resin composition, preparation method thereof, particles and moulded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0612] Hereinafter, specific examples and comparative examples are given and described, but the present invention is not limited to these examples.

[0613] [raw material]

[0614] The raw materials used in the following Examples and Comparative Examples are as follows.

[0615] [[Monomers constituting methacrylic resin]]

[0616] ■Methyl methacrylate (MMA)

[0617] Asahi Kasei Co., Ltd. (as a polymerization inhibitor, 2.5 ppm of 2,4-dimethyl-6-tert-butylphenol (2,4-di-methyl- 6-tert-butylphenol))

[0618] N-Phenylmaleimide (N-PMI): Manufactured by Nippon Shokubai Co., Ltd.

[0619] N-cyclohexylmaleimide (N-CMI): manufactured by Nippon Shokubai Co., Ltd.

[0620] 2-(Hydroxymethyl)methyl acrylate (MHMA): manufactured by Combi Bloks

[0621] [[Organic solvents]]

[0622] Meta-xylene: Mitsui Chemicals Co., Ltd. product

[0623] ■Toluene

[0624] [[other]]

[0625] ■n-octylmercaptan (NOM): manufactured by NOF Corporation, used as a chain transfer agent.

[0626] ■Perhex...

manufacture example 1

[0720] In the 1.25m equipped with a stirring device equipped with paddle-shaped wings, a temperature sensor, a cooling pipe, and a nitrogen introduction pipe 3 Methyl methacrylate (MMA), 33.0kg of N-phenylmaleimide (N-PMI), 84.7kg of N-cyclohexylmaleimide (N- CMI), 450.0 kg of m-xylene, and 0.28 kg of n-octyl mercaptan were dissolved to prepare a raw material solution. Nitrogen was blown thereinto, and the temperature was raised to 125°C while stirring.

[0721] Separately, an initiator feed solution obtained by mixing 0.23 kg of Perhexa C-75 and 1.82 kg of m-xylene was prepared.

[0722] When the raw material solution reached 127° C., the supply (addition) of the initiator supply solution (polymerization initiator mixed solution) was started according to procedures (1) to (6).

[0723] (1) 0.0 to 0.5 hours: the supply rate is 1.00 kg / hour.

[0724] (2) 0.5 to 1.0 hours: the supply rate is 0.50 kg / hour.

[0725] (3) 1.0 to 2.0 hours: the supply rate is 0.42 kg / hour.

[07...

manufacture example 2

[0735] In a 200L reactor with a stirring device equipped with a paddle-shaped wing, a temperature sensor, a cooling pipe, and a nitrogen introduction pipe, add 41.0 kg of methyl methacrylate (MMA), 10.0 kg of 2-(hydroxymethyl) Methyl acrylate (manufactured by Combi Bloks) and 50.0 kg of toluene were used to prepare a raw material solution. While blowing nitrogen therein, stirring was carried out, and the temperature of the liquid was raised to 107°C.

[0736] Separately, an initiator feed solution in which 0.05 kg of Perhexa C-75 and 0.36 kg of toluene were mixed was prepared.

[0737] When the temperature of the raw material solution reached 107° C., the supply of the initiator feed solution was started according to the procedures (1) to (4).

[0738] (1) 0.0 to 0.5 hours: the supply rate is 0.20 kg / hour.

[0739] (2) 0.5 to 1.0 hours: the supply rate is 0.10 kg / hour.

[0740] (3) 1.0 to 3.0 hours: the supply rate is 0.075 kg / hour.

[0741] (4) 3.0 to 7.0 hours: the suppl...

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Abstract

The purpose of the invention is to provide a methacrylic resin composition which has excellent continuous productivity and less content of foreign matters and can prepare a moulded body with excellentphysical property and appearance and also provide a preparation method of the methacrylic resin composition, particles and the moulded body. According to the invention, the composition contains methacrylic resin which contains more than 50 mass percent of a methacrylate monomer unit (A) and has ring structure, a glass-transition temperature is 110 DEG C to 160 DEG C, a particle counter is used for measuring, and each 1g contains less than 100 of foreign matters with partical sizes of more than 10[mu]m and less than 20[mu]m; the prepare method comprises: when an extruder runs, delivery volumes(delivery volumes / number of holes) of the methacrylic resin composition from holes of each die is more than 5kg / (hr*number) and less than 30 kg / (hr*number).

Description

technical field [0001] The present invention relates to a methacrylic resin composition with a low content of fine foreign matter, a method for producing the methacrylic resin composition, and a pellet and a molded article containing the methacrylic resin composition. Background technique [0002] In recent years, with the expansion of the display market, the demand for viewing images more clearly has increased, and optical materials that have higher optical characteristics in addition to transparency, heat resistance, and strength are required. [0003] Acrylic resins ((meth)acrylate polymers) are attracting attention as the above-mentioned optical materials from the viewpoints of transparency, surface hardness, optical properties, and the like. Moreover, in recent years, with the advancement of flat panel displays such as liquid crystal display devices, plasma displays, and organic EL display devices, infrared sensors, and optical waveguides, etc., and the expansion of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F222/40C08F220/28C08L33/12C08K5/00C08K5/134C08K5/526G02B1/04
Inventor 村上史树岩渕义昌
Owner ASAHI KASEI KK
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