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Transparent thermoplastic resin composition and molded article thereof

A technology of thermoplastic resin and composition, which is applied in the field of transparent thermoplastic resin composition, can solve the problems of insufficient balance and limitation of transparency, impact resistance, fluidity and mold pollution, and achieve good mold pollution and good color tone , highly transparent effect

Pending Publication Date: 2022-03-01
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in either method, the balance of transparency, impact resistance, fluidity, and mold contamination is insufficient, and application to a wide range of applications may be limited.

Method used

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  • Transparent thermoplastic resin composition and molded article thereof
  • Transparent thermoplastic resin composition and molded article thereof
  • Transparent thermoplastic resin composition and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0132] Hereinafter, although an Example is given and this invention is described in more detail, this invention is not limited to these Examples, and is interpreted. First, the evaluation method will be described.

[0133] (1) Mass average particle size of rubbery polymer

[0134] After diluting and dispersing the latex of the rubbery polymer (r) in an aqueous medium, the particle size distribution was measured with a laser scattering diffraction particle size distribution measuring device "LS 13 320" (Beckman Coulter Co., Ltd.). The mass average particle diameter of the rubbery polymer (r) was calculated from this particle diameter distribution.

[0135] (2) Refractive index of rubbery polymer (r)

[0136] While stirring 150 ml of methanol at 300 rpm, 10 ml of emulsified rubber latex was added, and then 20 ml of sulfuric acid adjusted to 10% by mass was added to obtain a precipitate of a rubbery polymer (r). The precipitate of the rubbery polymer (r) was dried under reduce...

manufacture example 1

[0184] (Manufacture example 1) graft copolymer (A-1)

[0185] In a four-neck flask with an internal capacity of 5 liters equipped with a stirring blade, 50 parts by mass (solid content conversion) of polybutadiene latex (mass average particle diameter of rubber: 0.30 μm, refractive index: 1.516), 130 parts by mass of pure water, 0.4 parts by mass of sodium laurate, 0.2 parts by mass of glucose, 0.2 parts by mass of sodium pyrophosphate, and 0.01 parts by mass of ferrous sulfate. After nitrogen replacement, the temperature was adjusted to 60°C, and 3.0 parts by mass of styrene was initially added over 45 minutes while stirring. parts, a monomer mixture of 12.0 parts by mass of methyl methacrylate and 0.16 parts by mass of tert-dodecylmercaptan.

[0186] Next, an initiator mixture of 0.3 parts by mass of cumene hydroperoxide, 1.6 parts by mass of sodium laurate as an emulsifier, and 25 parts by mass of pure water was continuously added dropwise over 4 hours. Simultaneously, a m...

manufacture example 2

[0187] (Manufacture example 2) graft copolymer (A-2)

[0188] Into a four-neck flask with an internal capacity of 5 liters equipped with a stirring blade, 50 parts by mass (solid content conversion) of polybutadiene latex (rubber mass average particle diameter 0.30 μm, refractive index 1.516), 130 parts by mass of pure water, and laurel 0.4 parts by mass of sodium bicarbonate, 0.2 parts by mass of glucose, 0.2 parts by mass of sodium pyrophosphate, and 0.01 parts by mass of ferrous sulfate. After nitrogen substitution, the temperature was adjusted to 60°C, and 2.5 parts by mass of styrene was initially added over 45 minutes while stirring. , a monomer mixture of 2.0 parts by mass of acrylonitrile, 10.5 parts by mass of methyl methacrylate, and 0.16 parts by mass of t-dodecylmercaptan.

[0189] Next, an initiator mixture of 0.3 parts by mass of cumene hydroperoxide, 1.6 parts by mass of sodium laurate as an emulsifier, and 25 parts by mass of pure water was continuously added d...

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Abstract

The present invention addresses the problem of providing a transparent thermoplastic resin composition having excellent impact resistance and flowability, high transparency, good color tone, and good mold contamination properties, the transparent thermoplastic resin composition being mainly composed of the following transparent thermoplastic resin composition, the transparent thermoplastic resin composition contains 15-40 ppm (inclusive) of a polydimethylsiloxane adhesive (C) having a weight-average molecular weight of 300,000 or more with respect to 100 parts by mass of a transparent thermoplastic resin composition comprising 10-60 parts by mass of a graft copolymer (A) and 40-90 parts by mass of a vinyl copolymer (B), and the graft copolymer (A) is obtained by polymerizing a polydimethylsiloxane resin (C) having a weight-average molecular weight of 300,000 or more in the presence of a rubbery polymer (r). The vinyl copolymer (B) is obtained by graft-copolymerizing a monomer mixture (a) containing at least an aromatic vinyl monomer (a1) and a (meth) acrylate monomer (a2), and the vinyl copolymer (B) is obtained by copolymerizing a monomer mixture (b) containing at least an aromatic vinyl monomer (b1), a (meth) acrylate monomer (b2) and a vinyl cyanide monomer (b3).

Description

technical field [0001] The present invention relates to a transparent thermoplastic resin composition having excellent impact resistance and fluidity, high transparency, good color tone, and good mold staining properties. Background technique [0002] It is known that rubbery polymers such as diene rubbers contain (i) aromatic vinyl compounds such as styrene and α-methylstyrene, and (ii) cyanide vinyl compounds such as acrylonitrile and methacrylonitrile. , A transparent ABS resin obtained by copolymerizing with (iii) a graft copolymer of unsaturated carboxylic acid alkyl ester compounds such as methyl methacrylate and methyl acrylate. This transparent ABS resin is excellent in (i) transparency, (ii) mechanical strength balance such as impact resistance and rigidity, (iii) fluidity, (iii) mold contamination, cost efficiency, etc., so it is used in home appliances and communication-related equipment. It is widely used in applications such as general miscellaneous goods and m...

Claims

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Application Information

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IPC IPC(8): C08F279/06C08L33/06C08L51/04C08L83/04
CPCC08L51/04C08L83/04C08L33/12C08F279/02C08L2205/03C08F220/14C08G77/04C08F279/06C08F212/08C08F220/44C08L51/085C08L25/12C08L33/06C08L25/14C08L2201/10C08L2203/30
Inventor 柴田拓哉菅贵纪长谷隆行
Owner TORAY IND INC
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