Aromatic polycarbonate resin composition and molded article thereof
A polycarbonate resin and aromatic technology, applied in the field of aromatic polycarbonate resin composition and its molded products, can solve the problems of impact strength reduction, impact strength of thin-wall molded products without surface impact, etc., and achieve surface Excellent impact effect
Inactive Publication Date: 2008-12-03
MITSUBISHI ENG PLASTICS CORP
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- Abstract
- Description
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- Application Information
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Problems solved by technology
However, in these polycarbonate resin compositions, there is a problem that the impact strength in a specific direction decreases due to the dispersion of the domains formed by ABS and the influence of the orientation state.
Moreover, in the proposals proposed above, the impact strength of actual thin-walled molded products such as surface impact is not mentioned.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～5 and comparative example 1～5
[0106] Mix the components except the phosphorus flame retardant in the ratio (weight ratio) shown in Table 1 and Table 2, and mix with a drum for 20 minutes, then set the temperature of the barrel to the following specified temperature, and set it to A twin-screw extruder (manufactured by Nippon Steel Works, "TEX30HSST", barrel: 12-stage structure) with a screw speed of 250 rpm and an extrusion speed of 20 kg / hour was used for kneading, and the extruded strands were cut to produce pellets . Except for Comparative Example 5, the cylinder temperature was 250°C, and in Comparative Example 5, it was 360°C. Then, the phosphorus flame retardant is heated to 80°C, and added in the third stage counting from the side of the hopper by the gear pump. Using the obtained pellets, the following tests were performed, and the results are shown in Tables 1 and 2.
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Abstract
It is intended to provide an aromatic polycarbonate resin composition, which is excellent in surface impact strength and flame retardancy and appropriately usable in producing thin-wall molded articles, and a molded article thereof. An aromatic polycarbonate resin composition comprising, per 100 parts by weight of a blend composed of from 60 to 90% by weight of an aromatic polycarbonate resin (a), from 10 to 40% by weight of a rubbery polymer / aromatic vinyl / vinyl cyanide-based copolymer (b-1) and from 0 to 35% by weight of an aromatic vinyl / vinyl cyanide-based copolymer (b-2), from 10 to 40 parts by weight of a phosphorus-based flame retardant (c), from 0 to 5 parts by weight of a fluoropolyolefin (d) and from 0 to 50 parts by weight of an inorganic filler (e), wherein the ratio of the rubbery polymer component to the sum of the components (b-1) and (b-2) is from 31 to 50% by weight and the Charpy notched impact strength in the flow-parallel direction (Cpf) and the Charpy notched impact strength in the flow-vertical direction (Cpc) of an injection molded article of the aromatic polycarbonate resin composition, which are measured in accordance with JIS K7111, fulfill the relationship represented by the following formula (1): Cpf / Cpc<2 (1).
Description
technical field [0001] The present invention relates to an aromatic polycarbonate resin composition and its molded article. More specifically, it relates to an aromatic polycarbonate resin composition and its molded article which are excellent in surface impact strength and flame retardancy and are suitable for producing thin-walled molded articles. Background technique [0002] For a long time, polycarbonate resin has excellent mechanical properties and is widely used as raw materials in the automotive field, OA machine field, electrical and electronic fields, etc., but it has high melt viscosity, poor fluidity, and thickness dependence of impact strength Big downside. In order to ensure fluidity, a method of using a low-molecular-weight polycarbonate resin, a method of blending various fluidity improvers, and the like are exemplified. When these methods are used, the effect of fluidity improvement can be confirmed, but there are disadvantages such as loss of the original ...
Claims
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IPC IPC(8): C08L69/00C08K5/51C08L51/04
CPCC08K5/523C08L69/00Y10T428/269C08L51/04C08K3/0033C08L55/02C08K3/013C08L2666/02C08L2666/04C08L2666/14C08L2666/24
Inventor 小川泰史增木达也
Owner MITSUBISHI ENG PLASTICS CORP
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