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Impact resistance modifier and resin composition

A technology of impact resistance and modifier, applied in the field of impact resistance modifier, can solve the problems of decreased hardness and low practicability, and achieve the effect of excellent impact resistance and excellent transparency

Inactive Publication Date: 2007-04-18
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, although the impact resistance is improved to a certain extent, it is required to further improve the impact resistance
[0005] Although a large amount of impact modifier such as the above-mentioned multilayer structure graft copolymer can achieve higher impact resistance, such a methacrylic resin composition has low practicability due to a decrease in hardness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] [Manufacture of multilayer structure graft copolymer (1)]

[0082] Into a five-neck flask equipped with a stirrer, a reflux condenser, a nitrogen blowing port, a monomer addition port, and a thermometer, the following component 1 was put.

[0083] (ingredient 1)

[0084] 234 parts of deionized water

[0085] Sodium carbonate 0.034 parts

[0086] Next, under the condition of mixing and stirring the system, the temperature was raised to 80° C. while replacing nitrogen, and the following component 2 was added.

[0087] (ingredient 2)

[0088] Ferrous sulfate 1.27×10 -4 share

[0089] Disodium edetate 3.80×10 -4 share

[0090] SFS 0.48 parts

[0091] After 5 minutes, the mixture (a-1) (0.42 parts / min) of the following composition was added over 4 hours, and the state of 80°C was maintained for 2 hours to complete the polymerization of the inner layer polymer. The polymerization rate of the obtained latex (A-1) (unreacted monomers were measured by gas chromatography, ...

Embodiment 11

[0111] [Preparation and evaluation of resin compositions containing impact modifiers]

[0112] Next, using a twin-screw extruder with an outer shape of 30mmΦ (PCM-30 type (trade name) manufactured by Ikegai Co., Ltd., L / D=25), at a cylinder temperature of 230°C to 260°C and a mold temperature of 260°C, the A mixture of 400 parts of multilayer structure graft copolymer (1) and 600 parts of methacrylic acid resin (AP-1) (acrypet V, trade name, manufactured by Mitsubishi Rayon Co., Ltd.) Acrylic resin (1)] / [multilayer structure graft copolymer (1)]=60 / 40 (mass ratio) of the resin composition particles. Next, molded bodies were prepared using the pellets, and the Izod impact strength and haze were evaluated. Table 3 shows the results.

Embodiment 2～10、 comparative example 1～6

[0114] [Manufacture of multilayer structure graft copolymer (2) to (16)]

[0115] Except that the kind, amount, etc. of raw materials are changed as shown in Table 1, the method of manufacturing the multilayer structure graft copolymer (1) shown in Example 1 is operated in the same way to obtain the multilayer structure graft copolymer (2) ~(16). In addition, Table 2 shows the mass average particle diameter of the polymer in the inner layer and the Tg of the polymer in the outer layer. Among them, the multi-layer structure graft copolymer (16) may coagulate during recovery due to the low Tg of the outer layer, and the powder cannot be recovered.

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PUM

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Abstract

Disclosed is a resin composition having excellent impact resistance without deteriorating excellent transparency of a methacrylic resin. Specifically, an impact resistance modifier composed of a multilayered polymer having at least two layers, namely 100 parts by mass of an inner-layer polymer which contains an alkyl acrylate and a multifunctional monomer and has a mass-average particle size of 200-300 nm and 30-100 parts by mass of an outer-layer polymer which contains an alkyl methacrylate and has a Tg of 20-80 1 / 2 C, is blended into a methacrylic resin whose main constitutional unit is a methyl methacrylate.

Description

technical field [0001] The present invention relates to a resin composition excellent in transparency and impact resistance, and an impact modifier used therefor. Background technique [0002] Methacrylic resins are excellent in transparency, weather resistance, and formability, and are widely used in automotive parts, lighting products, and various panels. However, methacrylic resins generally have insufficient impact resistance, so their uses are limited. [0003] Therefore, in order to improve the impact resistance of methacrylic resin, it has been proposed to improve the hardness of methacrylic resin and the like by adding a multilayer structure graft copolymer with a three-layer structure of hard-soft-hard as the basic structure. A method for improving the impact resistance of high-quality resins (for example, refer to Patent Document 1). However, in this method, although the impact resistance is improved to some extent, it is still not satisfactory. [0004] In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08L33/12C08L51/00
CPCC08L33/12C08L2666/02
Inventor 长坂俊夫杨井寿美畠山宏毅
Owner MITSUBISHI RAYON CO LTD